<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-size:large">Hi Andrei,<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Sep 22, 2020 at 5:21 AM Andrei Chis <<a href="mailto:chisvasileandrei@gmail.com">chisvasileandrei@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"> <div style="word-wrap:break-word;line-break:after-white-space">Hi Eliot,<div><br></div><div>Unfortunately with the assert vm with memory leak checks it seems I cannot reproduce the problem. </div><div>I’ll try to run it a few more times, maybe I get lucky and get a crash (a run takes a few hours). </div><div><br></div><div>For our case, calling `self pc` before copying a context really helped. Before almost 50% of our builds were failing; now we get no more failures at all.</div><div>Thanks for your insights!</div><div><br></div><div>Are there other ways to get relevant/helpful details from a crash with a normal vm?</div></div></blockquote><div><br></div><div class="gmail_default" style="font-size:large">The crash.log should include the primitive trace log, which is the last 256 external primitives the VM has called. Can you post that part of the crash log?</div><div class="gmail_default" style="font-size:large"><br></div><div class="gmail_default" style="font-size:large">The memory leak checking can be turned on in a production VM, it's just that the output is a bit harder to parse.  So try that also.</div><div class="gmail_default" style="font-size:large"></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div style="word-wrap:break-word;line-break:after-white-space"><div>Cheers,<br></div><div>Andrei</div><div><br><div><br><blockquote type="cite"><div>On 15 Sep 2020, at 01:27, Eliot Miranda <<a href="mailto:eliot.miranda@gmail.com" target="_blank">eliot.miranda@gmail.com</a>> wrote:</div><br><div><span style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline">Hi Andrei,</span><br style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><br style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><div dir="ltr" style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><blockquote type="cite"><br>On Sep 14, 2020, at 3:22 PM, Andrei Chis <<a href="mailto:chisvasileandrei@gmail.com" target="_blank">chisvasileandrei@gmail.com</a>> wrote:<br><br></blockquote></div><blockquote type="cite" style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><div dir="ltr"><span>Hi Eliot,<div><br></div><div>The setup in GT is a bit customised (some changes in the headless vm, some custom plugins, custom rendering) so I first thought it will be impossible to reproduce the bug in a more standard manner. </div><div>However turns out it is possible. If I use the following script after running the tests a few times in lldb I get the crash starting from a plain Pharo 8 image.</div><div><br></div><div><div><span style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures">$ curl<span> </span></span><a href="https://get.pharo.org/64/80+vm" style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures" target="_blank">https://get.pharo.org/64/80+vm</a><span style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures"><span> </span>| bash</span></div><div><span style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures">$ curl -L<span> </span></span><a href="https://raw.githubusercontent.com/feenkcom/gtoolkit/master/scripts/localbuild/loadgt.st" style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures" target="_blank">https://raw.githubusercontent.com/feenkcom/gtoolkit/master/scripts/localbuild/loadgt.st</a><span style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures"><span> </span>-o<span> </span></span><a href="http://loadgt.st/" style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures" target="_blank">loadgt.st</a><span style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures"><span> </span> </span></div><div><span style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures">$ ./pharo Pharo.image st --quit<span> </span></span><a href="http://loadgt.st/" style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures" target="_blank"></a></div><div><span style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures"><br></span></div><div><span style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures">$ lldb ./pharo-vm/Pharo.app/Contents/MacOS/Pharo</span></div><div><span style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures">(lldb) run --headless Pharo.image examples --junit-xml-output 'GToolkit-.*' 'GT4SmaCC-.*' 'DeepTraverser-.*' Brick 'Brick-.*' Bloc 'Bloc-.*' 'Sparta-.*'</span></div></div><div><br><div><br></div><div>I also tried to compile the vm myself on Mac (Catalina 10.15.6). I build a normal and assert for <a href="https://github.com/OpenSmalltalk/opensmalltalk-vm" target="_blank">https://github.com/OpenSmalltalk/opensmalltalk-vm</a> and <a href="https://github.com/pharo-project/opensmalltalk-vm" target="_blank">https://github.com/pharo-project/opensmalltalk-vm</a> from the cog branch.</div><div>In both cases I get an issue related to pixman 0.34.0 [1] but that’s easy to workaround. For <a href="https://github.com/OpenSmalltalk/opensmalltalk-vm" target="_blank">https://github.com/OpenSmalltalk/opensmalltalk-vm</a> I got an extra problem related to Cairo [2] and had to change libpng from libpng16 to libpng12 to get it to work.</div><div><br></div><div><div>With both the normal VMs I could reproduce the bug and got stacks with the Context>copyTo: messages. </div><div><br></div><div>With the assert VMs I only got a crash for now with the assert vm from <a href="https://github.com/pharo-project/opensmalltalk-vm" target="_blank">https://github.com/pharo-project/opensmalltalk-vm</a>. However there is no Context>copyTo: and the memory seems quite corrupted. </div><div>I suspect the crash also appears in <a href="https://github.com/OpenSmalltalk/opensmalltalk-vm" target="_blank">https://github.com/OpenSmalltalk/opensmalltalk-vm</a>  but seems that with the assert vm it is much harder to reproduce. Had to run the tests 20 times and got one crash; running the tests once take 20-30 minutes. </div><div><br></div><div><br></div><div>This is from only crash until now with the assert vm. Not sure if they are helpful or not, or actually related to the problem.</div><div><br></div><div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">validInstructionPointerinFrame(GIV(instructionPointer), GIV(framePointer)) 18471</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">Pharo was compiled with optimization - stepping may behave oddly; variables may not be available.</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">Process 73731 stopped</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(180,36,25)"><span style="font-variant-ligatures:no-common-ligatures">* thread #1, queue =<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">'com.apple.main-thread'</span><span style="font-variant-ligatures:no-common-ligatures">, stop reason =<span> </span></span><span style="font-variant-ligatures:no-common-ligatures">EXC_BAD_ACCESS (code=2, address=0x157800000)</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #0:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x0000000100015837</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>Pharo`longAtPointerput(ptr="????", val=5513312480) at<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(46,174,187)">sqMemoryAccess.h</span><span style="font-variant-ligatures:no-common-ligatures">:</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">142</span><span style="font-variant-ligatures:no-common-ligatures">:</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">84</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>[opt]</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">   139<span> </span><span style="white-space:pre-wrap">        </span> <span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">static</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">inline</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>sqInt intAtPointer(</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">char</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*ptr)<span style="white-space:pre-wrap">                       </span>{<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">return</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>(sqInt)(*((</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">int</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*)ptr)); }</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">   140<span> </span><span style="white-space:pre-wrap"> </span> <span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">static</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">inline</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>sqInt intAtPointerput(</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">char</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*ptr,<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">int</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>val)<span style="white-space:pre-wrap">      </span>{<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">return</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>(sqInt)(*((</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">int</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*)ptr)= val); }</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">   141<span> </span><span style="white-space:pre-wrap">    </span> <span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">static</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">inline</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>sqInt longAtPointer(</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">char</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*ptr)<span style="white-space:pre-wrap">                      </span>{<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">return</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*(sqInt *)ptr; }</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">-> 142<span> </span><span style="white-space:pre-wrap">    </span> <span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">static</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">inline</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>sqInt longAtPointerput(</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">char</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*ptr, sqInt val)<span style="white-space:pre-wrap">        </span>{<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">return</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*(sqInt *)ptr</span><span style="text-decoration:underline;font-variant-ligatures:no-common-ligatures">=</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>val; }</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">   143<span> </span><span style="white-space:pre-wrap">        </span> <span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">static</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">inline</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>sqLong long64AtPointer(</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">char</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*ptr)<span style="white-space:pre-wrap">                   </span>{<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">return</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*(sqLong *)ptr; }</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">   144<span> </span><span style="white-space:pre-wrap">    </span> <span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">static</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">inline</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>sqLong long64AtPointerput(</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">char</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*ptr, sqLong val)<span style="white-space:pre-wrap">    </span>{<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">return</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*(sqLong *)ptr= val; }</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">   145<span> </span><span style="white-space:pre-wrap">       </span> <span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">static</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">inline</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">float</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>singleFloatAtPointer(</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">char</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*ptr)<span style="white-space:pre-wrap">                    </span>{<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">return</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*(</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">float</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>*)ptr; }</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">Target 0: (Pharo) stopped.</span></div></div><div><br></div><div><br></div><div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(153,153,153)"><span style="font-variant-ligatures:no-common-ligatures">(lldb)<span> </span></span><span style="font-variant-ligatures:no-common-ligatures">bt</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(180,36,25)"><span style="font-variant-ligatures:no-common-ligatures">* thread #1, queue =<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">'com.apple.main-thread'</span><span style="font-variant-ligatures:no-common-ligatures">, stop reason =<span> </span></span><span style="font-variant-ligatures:no-common-ligatures">EXC_BAD_ACCESS (code=2, address=0x157800000)</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">  * frame #0:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x0000000100015837</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>Pharo`longAtPointerput(ptr="????", val=5513312480) at<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(46,174,187)">sqMemoryAccess.h</span><span style="font-variant-ligatures:no-common-ligatures">:</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">142</span><span style="font-variant-ligatures:no-common-ligatures">:</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">84</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>[opt]</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #1:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00000001000161cf</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>Pharo`marryFrameSP(theFP=<unavailable>, theSP=0x0000000000000000) at<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(46,174,187)">gcc3x-cointerp.c</span><span style="font-variant-ligatures:no-common-ligatures">:</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">68120</span><span style="font-variant-ligatures:no-common-ligatures">:</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">3</span><span style="font-variant-ligatures:no-common-ligatures">[opt]</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #2:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x000000010001f5ac</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>Pharo`ceContextinstVar(maybeContext=5510359872, slotIndex=0) at<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(46,174,187)">gcc3x-cointerp.c</span><span style="font-variant-ligatures:no-common-ligatures">:</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">15221</span><span style="font-variant-ligatures:no-common-ligatures">:</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">12</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>[opt]</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(159,160,28)"><span style="font-variant-ligatures:no-common-ligatures">    frame #3:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures">0x00000001480017d6</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #4:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00000001000022be</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>Pharo`interpret at<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(46,174,187)">gcc3x-cointerp.c</span><span style="font-variant-ligatures:no-common-ligatures">:</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">2755</span><span style="font-variant-ligatures:no-common-ligatures">:</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">3</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>[opt]</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #5:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00000001000bc244</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>Pharo`-[sqSqueakMainApplication runSqueak](self=0x0000000101c76dc0, _cmd=<unavailable>) at<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(46,174,187)">sqSqueakMainApplication.m</span><span style="font-variant-ligatures:no-common-ligatures">:</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">201</span><span style="font-variant-ligatures:no-common-ligatures">:</span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">2</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>[opt]</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #6:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff3326729b</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>Foundation`__NSFirePerformWithOrder + 360</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #7:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff30ad3335</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #8:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff30ad3267</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>CoreFoundation`__CFRunLoopDoObservers + 457</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #9:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff30ad2805</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>CoreFoundation`__CFRunLoopRun + 874</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #10:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff30ad1e3e</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>CoreFoundation`CFRunLoopRunSpecific + 462</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #11:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff2f6feabd</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>HIToolbox`RunCurrentEventLoopInMode + 292</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #12:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff2f6fe6f4</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>HIToolbox`ReceiveNextEventCommon + 359</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #13:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff2f6fe579</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 64</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #14:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff2dd44039</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>AppKit`_DPSNextEvent + 883</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #15:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff2dd42880</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>AppKit`-[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1352</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #16:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff2dd3458e</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>AppKit`-[NSApplication run] + 658</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #17:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff2dd06396</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>AppKit`NSApplicationMain + 777</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">    frame #18:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x00007fff6ab3ecc9</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>libdyld.dylib`start + 1</span></div></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures"><br></span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures"><br></span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures"><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures;color:rgb(153,153,153)">(lldb)<span> </span></span><span style="font-variant-ligatures:no-common-ligatures">call printCallStack()</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3920 M INVALID RECEIVER>(nil) 0x148716b40: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3968 M [] in INVALID RECEIVER>(nil) Context(Object)>>doesNotUnderstand: #bounds</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures"> 0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe39a8 M INVALID RECEIVER>(nil) 0x1489fcec0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe39e8 M INVALID RECEIVER>(nil)  0x1489fcec0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3a30 I INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3a80 M [] in INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3ab8 M INVALID RECEIVER>(nil)  0x148163cd0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3b08 I INVALID RECEIVER>(nil)  0x148163c18: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3b40 M INVALID RECEIVER>(nil)  0x148163c18: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3b78 M INVALID RECEIVER>(nil)  0x1481634e0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3bc0 I INVALID RECEIVER>(nil)  0x148716a38: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3c10 I INVALID RECEIVER>(nil)  0x14d0338e8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3c40 M INVALID RECEIVER>(nil)  0x14d0338e8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3c78 M INVALID RECEIVER>(nil)  0x14d0338e8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3cc0 M INVALID RECEIVER>(nil)  0x14d0337f0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3d08 M INVALID RECEIVER>(nil)  0x14d033738: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3d50 M INVALID RECEIVER>(nil)  0x14d033680: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3d98 M INVALID RECEIVER>(nil)  0x1946493f0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3de0 M INVALID RECEIVER>(nil)  0x194649338: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3e28 M INVALID RECEIVER>(nil)  0x194649280: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3e70 M INVALID RECEIVER>(nil)  0x1946491c8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe3eb8 M INVALID RECEIVER>(nil)  0x194649110: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbec768 M INVALID RECEIVER>(nil)  0x194649038: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbec7b0 M INVALID RECEIVER>(nil)  0x194648f60: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbec7f8 M INVALID RECEIVER>(nil)  0x194648e88: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbec840 M INVALID RECEIVER>(nil)  0x194648dd0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbec888 M INVALID RECEIVER>(nil)  0x194648d18: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbec8d0 M INVALID RECEIVER>(nil)  0x194648c60: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbec918 M INVALID RECEIVER>(nil)  0x194648b88: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbec960 M INVALID RECEIVER>(nil)  0x194648ad0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbec9a8 M INVALID RECEIVER>(nil)  0x194648a18: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbec9f0 M INVALID RECEIVER>(nil)  0x194648960: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeca38 M INVALID RECEIVER>(nil)  0x1946488a8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeca80 M INVALID RECEIVER>(nil)  0x1946487f0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbecac8 M INVALID RECEIVER>(nil)  0x194648708: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbecb10 M INVALID RECEIVER>(nil)  0x194648620: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbecb58 M INVALID RECEIVER>(nil)  0x194648508: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbecba0 M INVALID RECEIVER>(nil)  0x194648450: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbecbe8 M INVALID RECEIVER>(nil)  0x1481641a8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbecc30 M INVALID RECEIVER>(nil)  0x1481640f0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbecc78 M INVALID RECEIVER>(nil)  0x148164038: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeccc0 M INVALID RECEIVER>(nil)  0x148163f80: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbecd08 M INVALID RECEIVER>(nil)  0x148163ec8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbecd50 M INVALID RECEIVER>(nil)  0x148163e10: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbecd98 M INVALID RECEIVER>(nil)  0x148163d28: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbecde0 M INVALID RECEIVER>(nil)  0x148163c18: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbece28 M INVALID RECEIVER>(nil)  0x148163b38: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbece70 M INVALID RECEIVER>(nil)  0x148163a80: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeceb8 M INVALID RECEIVER>(nil)  0x1481639c8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7758 M INVALID RECEIVER>(nil)  0x1481638e0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe77a0 M INVALID RECEIVER>(nil)  0x148163808: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe77e8 M INVALID RECEIVER>(nil)  0x148163750: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7830 M INVALID RECEIVER>(nil)  0x148163698: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7878 M INVALID RECEIVER>(nil)  0x1481635c0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe78c0 M INVALID RECEIVER>(nil)  0x1481634e0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7908 M INVALID RECEIVER>(nil)  0x148163408: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7950 M INVALID RECEIVER>(nil)  0x148163350: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7998 M INVALID RECEIVER>(nil)  0x148163298: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe79e0 M INVALID RECEIVER>(nil)  0x148163188: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7a28 M INVALID RECEIVER>(nil)  0x148163098: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7a70 M INVALID RECEIVER>(nil)  0x148162fa0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7ab8 M INVALID RECEIVER>(nil)  0x148162ec8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7b00 M INVALID RECEIVER>(nil)  0x148162e10: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7b48 M INVALID RECEIVER>(nil)  0x148712a08: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7b90 M INVALID RECEIVER>(nil)  0x148712950: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7bd8 M INVALID RECEIVER>(nil)  0x148712898: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7c20 M INVALID RECEIVER>(nil)  0x148713cc0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7c68 M INVALID RECEIVER>(nil)  0x148713018: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7cb0 M INVALID RECEIVER>(nil)  0x148713480: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7cf8 M INVALID RECEIVER>(nil)  0x148713140: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7d40 M INVALID RECEIVER>(nil)  0x148713928: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7d88 M INVALID RECEIVER>(nil)  0x1487133c8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7de0 I INVALID RECEIVER>(nil)  0x148713238: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7e28 I INVALID RECEIVER>(nil)  0x1487131f8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7e70 I INVALID RECEIVER>(nil)  0x1487131f8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe7eb8 I INVALID RECEIVER>(nil)  0x1487123d8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeea68 I INVALID RECEIVER>(nil)  0x1487123d8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeeac8 M [] in INVALID RECEIVER>(nil)  0x1487123d8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeeb00 M INVALID RECEIVER>(nil)  0x148713108: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeeb50 I INVALID RECEIVER>(nil)  0x148713480: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeeb98 I INVALID RECEIVER>(nil)  0x148713480: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeebe0 I INVALID RECEIVER>(nil)  0x1487131f8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeec10 M INVALID RECEIVER>(nil) 0x9=1</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeec48 M INVALID RECEIVER>(nil)  0x1487123c8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeeca0 M [] in INVALID RECEIVER>(nil)  0x1487123d8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeecd0 M INVALID RECEIVER>(nil)  0x1487130d0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeed10 M INVALID RECEIVER>(nil)  0x1487123d8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeed58 M INVALID RECEIVER>(nil)  0x1487123d8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeedb0 I INVALID RECEIVER>(nil)  0x1487123c8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeedf0 I INVALID RECEIVER>(nil)  0x1487123c8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeee20 M [] in INVALID RECEIVER>(nil)  0x148162ce8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeee78 M INVALID RECEIVER>(nil)  0x148162df0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbeeec0 M INVALID RECEIVER>(nil)  0x148162ce8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5978 M INVALID RECEIVER>(nil)  0x148162f80: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe59d8 M [] in INVALID RECEIVER>(nil)  0x148162f80: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5a18 M INVALID RECEIVER>(nil)  0x148163150: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5a68 M INVALID RECEIVER>(nil)  0x148162f80: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5aa0 M INVALID RECEIVER>(nil)  0x148162f80: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5ad8 M [] in INVALID RECEIVER>(nil)  0x148162f80: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5b08 M INVALID RECEIVER>(nil)  0x1481634c0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5b48 M INVALID RECEIVER>(nil)  0x14c403ca8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5b88 M INVALID RECEIVER>(nil)  0x148162f80: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5bc0 M INVALID RECEIVER>(nil)  0x148162f80: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5bf0 M [] in INVALID RECEIVER>(nil)  0x148162f80: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5c20 M INVALID RECEIVER>(nil)  0x148162f80: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5c68 M INVALID RECEIVER>(nil)  0x148162f80: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5c98 M INVALID RECEIVER>(nil)  0x194656468: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5cd0 M [] in INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5d00 M INVALID RECEIVER>(nil)  0x148163bf0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5d50 M [] in INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5d88 M INVALID RECEIVER>(nil)  0x1489fcff0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5dc0 M INVALID RECEIVER>(nil)  0x1489fcff0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5e00 M INVALID RECEIVER>(nil)  0x148163de0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5e38 M INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5e80 M INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbe5eb8 M [] in INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdf9d8 M INVALID RECEIVER>(nil)  0x194648430: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfa10 M [] in INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfa50 M [] in INVALID RECEIVER>(nil)  0x148a02930: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfa90 M INVALID RECEIVER>(nil)  0x1946486d8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfad0 M INVALID RECEIVER>(nil)  0x148a02930: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfb10 M INVALID RECEIVER>(nil)  0x1946485e0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfb48 M INVALID RECEIVER>(nil)  0x1489f7da8: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfb80 M INVALID RECEIVER>(nil)  0x148a02930: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfbb8 M INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfbe8 M [] in INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfc20 M INVALID RECEIVER>(nil)  0x1489fcff0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfc58 M INVALID RECEIVER>(nil)  0x1489fcff0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfc98 M INVALID RECEIVER>(nil)  0x194648c40: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfcc8 M [] in INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfd08 M INVALID RECEIVER>(nil)  0x194648f40: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfd40 M [] in INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfd70 M INVALID RECEIVER>(nil)  0x14902a730: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfdb0 M INVALID RECEIVER>(nil)  0x194648118: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfde8 M INVALID RECEIVER>(nil)  0x14c4033c0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfe20 M [] in INVALID RECEIVER>(nil)  0x14c4033c0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfe70 M [] in INVALID RECEIVER>(nil)  0x14d032f98: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    0x7ffeefbdfeb8 M INVALID RECEIVER>(nil)  0x14d032fe0: a(n) bad class</span></div><div style="margin:0px;font-stretch:normal;line-height:normal;min-height:13px"><span style="font-variant-ligatures:no-common-ligatures"></span><br></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">(callerContextOrNil == (nilObject())) || (isContext(callerContextOrNil)) 72783</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">       0x14d033738 is not a context</span></div></span></div></div></div></span></div></blockquote><div style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><br></div><span style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline">OK, interesting.  Both the assert failure and the badly corrupted stack trace lead me to believe that the issue happens long before the crash and is probably a stack corruption, either by a primitive cutting back the stack incorrectly, or some other hot riot ion (for example are all those nils in </span><span style="font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;font-family:Menlo;font-size:11px">INVALID RECEIVER>(nil) </span><span style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;float:none;display:inline">real or an artifact of attempting to print an invalid value?).</span><div style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><br></div><div style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none">So the next step is to run the asset vm with leak checking turned on.  Use</div><div style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><br></div><div style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none">myvm —leakcheck 3 to check after every GC</div><div style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><br></div><div style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none">We can add, eg leak checking after an FFI call, in an afternoon</div><div style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><br><blockquote type="cite"><div dir="ltr"><span><div><div><div>A more realistic setup would be to run GT with an assert headless vm. But until now I did not figure out how to build an assert vm for the gt-headless branch from <a href="https://github.com/feenkcom/opensmalltalk-vm" target="_blank">https://github.com/feenkcom/opensmalltalk-vm</a>. </div><div><br></div><div>Cheers,</div><div>Andrei</div></div><div><br></div><div><br></div><div>[1] <a href="https://github.com/OpenSmalltalk/opensmalltalk-vm/issues/258" target="_blank">https://github.com/OpenSmalltalk/opensmalltalk-vm/issues/258</a></div><div><br></div><div>[2] <span style="font-family:Menlo;font-size:11px">checking for cairo's PNG functions feature...</span><span style="font-family:Menlo;font-size:11px"> </span></div><div><span style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures">configure: WARNING: Could not find libpng in the pkg-config search path</span></div><div><span style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures">checking whether cairo's PNG functions feature could be enabled... no</span></div><div><span style="font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;font-variant-ligatures:no-common-ligatures">configure: error: recommended PNG functions feature could not be enabled</span></div><div><br><blockquote type="cite"><div>On 14 Sep 2020, at 17:32, Eliot Miranda <<a href="mailto:eliot.miranda@gmail.com" target="_blank">eliot.miranda@gmail.com</a>> wrote:</div><br><div><div dir="auto">Hi Andrei,<br><div dir="ltr"><br></div><div dir="ltr"><br><blockquote type="cite">On Sep 14, 2020, at 7:15 AM, Andrei Chis <<a href="mailto:chisvasileandrei@gmail.com" target="_blank">chisvasileandrei@gmail.com</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><span>Hi Eliot,<br><div><br><blockquote type="cite"><div>On 12 Sep 2020, at 01:42, Eliot Miranda <<a href="mailto:eliot.miranda@gmail.com" target="_blank">eliot.miranda@gmail.com</a>> wrote:</div><br><div><div dir="ltr" style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><div dir="ltr"><div dir="ltr">Hi Andrei,</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Sep 11, 2020 at 11:48 AM Andrei Chis <<a href="mailto:chisvasileandrei@gmail.com" target="_blank">chisvasileandrei@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"> <div dir="ltr"><div dir="ltr">Hi Eliot,<div><br></div><div>Thanks for the answer. That helps to understand what is going on and it can explain why just adding a call to `self pc` makes the crash disappear. </div><div><br></div><div>Just what was maybe not obvious in my previous email is that we get this problem more or less randomly. We have tests for verifying that tools work when various extensions raise exceptions (these tests copy the stack). Sometimes they work correctly and sometimes they crash. These crashes happen in various tests and until now the only common thing we noticed is that the pc of the contexts where the crash happens looks off. Also the contexts in which this happens are at the beginning of the stack so part of a long computation (it gets copied multiple times).</div><div><br></div><div>Initially we suspected that there is some memory corruption somewhere due to external calls/memory. Just the fact that calling `self pc` before seems to fix the issue reduces those chances. But who knows.</div></div></div></blockquote><div><br></div><div>Well, it does look like a VM bug.  The VM is somehow failing to intercept some access, perhaps in shallow copy.  Weird.  I shall try and reproduce.   Is there anything special about the process you copy using copyTo: ?</div></div></div></div></div></blockquote><div><br></div><div>I don’t think there is something special about that process. It is the process that we start to run tests [1]. The exception happens in the running process and the crash is when copying the stack of that running process.</div></div></span></div></blockquote><div><br></div>Ok, cool.  What I’d like to do is get a copy of your test setup and run it in an assert vm to try and get more information.  AFAICT the vm code is good do the bug is not obvious.  An assert vm may give more information before the crash.  Have you tried running the system on an assert vm yet?<div><br><blockquote type="cite"><div dir="ltr"><span><div><div>Checked some previous logs and we get these kinds of crashes on the CI server since at least two years. So it does not look like a new bug (but who knows).</div><br><blockquote type="cite"><div><div dir="ltr" style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><div dir="ltr"><div class="gmail_quote"><div><br></div><div>(see below)</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div>On Fri, Sep 11, 2020 at 6:36 PM Eliot Miranda <<a href="mailto:eliot.miranda@gmail.com" style="font-size:11px" target="_blank">eliot.miranda@gmail.com</a>> wrote:<br></div></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"> <div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr">Hi Andrei,<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Sep 11, 2020 at 8:58 AM Andrei Chis <<a href="mailto:chisvasileandrei@gmail.com" target="_blank">chisvasileandrei@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"> <div dir="ltr">Hi,<div><br></div><div>We are getting often crashes on our CI when calling `Context>copyTo:` in a GT image and a vm build from <a href="https://github.com/feenkcom/opensmalltalk-vm" target="_blank">https://github.com/feenkcom/opensmalltalk-vm</a>.</div><div><br></div><div>To sum up during `Context>copyTo:`, `Object>>#copy` is called on a context leading to a segmentation fault crash. Looking at that context in lldb the pc looks off.  It has the value `0xfffffffffea7f6e1`.</div><div><div><br></div><div><pre style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:11.9px;margin-top:0px;margin-bottom:16px;padding:16px;overflow:auto;line-height:1.45;background-color:rgb(246,248,250);border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-right-radius:6px;border-bottom-left-radius:6px;color:rgb(36,41,46)"><code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:11.9px;padding:0px;margin:0px;border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-right-radius:6px;border-bottom-left-radius:6px;word-break:normal;border:0px;display:inline;overflow:visible;line-height:inherit"> (lldb) call (void *) printOop(0x1206b6990)
    0x1206b6990: a(n) Context
     0x1206b6a48 0xfffffffffea7f6e1                0x9        0x1146b2e08        0x1206b6b00 
     0x1206b6b28        0x1206b6b50 <br></code></pre></div></div><div><br></div><div>Can this indicate some corruption or is it expected to have such values? `CoInterpreter>>ensureContextHasBytecodePC:` has code that also handles negative values for the pc which suggests that this might be expected.<br></div></div></blockquote><div><br></div><div>The issue is that that value is expected *inside* the VM.  It is the frame pointer for the context.  But above the Vm this value should be hidden. The VM should intercept all accesses to such fields in contexts and automatically map them back to the appropriate values that the image expects to see.  [The same thing is true for CompiledMethods; inside the VM methods may refer to their JITted code, but this is invisible from the image].  Intercepting access to Context state already happens with inst var access in methods, with the shallowCopy primitive, with instVarAt: et al, etc.</div><div><br></div><div>So I expect the issue here is that copyTo: invokes some primitive which does not (yet) check for a context receiver and/or argument, and hence accidentally it reveals the hidden state to the image and a crash results.  What I need to know are the definitions for copyTo: and copy, etc all the way down to primitives.</div></div></div></div></div></blockquote><div><br></div><div>Here is the source code:</div></div></div></blockquote><div><br></div><div>Cool, nothing unusual here.  This should all work perfectly.  Tis a VM bug. However...</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_quote"><div>Context >> copyTo: aContext <br></div><div>"Copy self and my sender chain down to, but not including, aContext.  End of copied chain will have nil sender."<br>   <span> </span>| copy |<br>   <span> </span>self == aContext ifTrue: [^ nil].<br>   <span> </span>copy := self copy.<br>   <span> </span>self sender ifNotNil: [<br>       <span> </span>copy privSender: (self sender copyTo: aContext)].<br>   <span> </span>^ copy<br></div></div></div></blockquote><div><br></div><div>Let me suggest</div><div><br></div><span>Context >> copyTo: aContext </span><br><span>   "Copy self and my sender chain down to, but not including, aContext.  End of copied chain will have nil sender."</span><br><span>    | copy |</span><br><span>    self == aContext ifTrue: [^ nil].</span><br><span>    copy := self copy.</span><br><span>    self sender ifNotNil:</span><br><span>        [:mySender| copy privSender: (mySender copyTo: aContext)].</span><br><div><span>    ^ copy</span> </div></div></div></div></div></blockquote><div><br></div><div>Nice!</div><div><br></div><div>I also tried the non-recursive implementation of Context>>#copyTo: from Squeak and it also crashes.</div><div><br></div><div>Not sure if related but now in the same image as before I got a different crash and printing the stack does not work. But this time the error seems to come from handleStackOverflow</div><div><br></div><div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures;color:rgb(153,153,153)">(lldb)<span> </span></span><span style="font-variant-ligatures:no-common-ligatures">call (void *)printCallStack()</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">invalid frame pointer</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">invalid frame pointer</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">invalid frame pointer</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">error: Execution was interrupted, reason: EXC_BAD_ACCESS (code=EXC_I386_GPFLT).</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">The process has been returned to the state before expression evaluation.</span></div><div style="margin:0px;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures"><div style="margin:0px;font-stretch:normal;line-height:normal;color:rgb(153,153,153)"><span style="font-variant-ligatures:no-common-ligatures">(lldb)<span> </span></span><span style="font-variant-ligatures:no-common-ligatures">bt</span></div><div style="margin:0px;font-stretch:normal;line-height:normal;color:rgb(180,36,25)"><span style="font-variant-ligatures:no-common-ligatures">* thread #1, queue =<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">'com.apple.main-thread'</span><span style="font-variant-ligatures:no-common-ligatures">, stop reason =<span> </span></span><span style="font-variant-ligatures:no-common-ligatures">EXC_BAD_ACCESS (code=2, address=0x121e00000)</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">  * frame #0:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x0000000100162258</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>libGlamorousToolkitVMCore.dylib`marryFrameSP + 584</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    frame #1:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x0000000100172982</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>libGlamorousToolkitVMCore.dylib`handleStackOverflow + 354</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    frame #2:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x000000010016b025</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>libGlamorousToolkitVMCore.dylib`ceStackOverflow + 149</span></div><div style="margin:0px;font-stretch:normal;line-height:normal;color:rgb(159,160,28)"><span style="font-variant-ligatures:no-common-ligatures">    frame #3:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures">0x00000001100005b3</span></div><div style="margin:0px;font-stretch:normal;line-height:normal"><span style="font-variant-ligatures:no-common-ligatures">    frame #4:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(159,160,28)">0x0000000100174d99</span><span style="font-variant-ligatures:no-common-ligatures"><span> </span>libGlamorousToolkitVMCore.dylib`ptEnterInterpreterFromCallback + 73</span></div></span></div><div><span style="font-variant-ligatures:no-common-ligatures"><br></span></div></div><div><br></div><div>Cheers,</div><div>Andrei</div><div><br></div><div>[1] <span style="font-family:Menlo;font-size:11px">./GlamorousToolkit.app/Contents/MacOS/GlamorousToolkit</span><span style="font-family:Menlo;font-size:11px">  </span><span style="font-family:Menlo;font-size:11px">Pharo.image examples --junit-xml-output 'GToolkit-.*' 'GT4SmaCC-.*' 'DeepTraverser-.*' Brick 'Brick-.*' Bloc 'Bloc-.*' 'Sparta-.*'</span></div><div><br></div><br><blockquote type="cite"><div><div dir="ltr" style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><div dir="ltr"><div class="gmail_quote"><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_quote"><div></div><div>Object>>#copy<br></div><div>    <span> </span>^self shallowCopy postCopy<br><br></div>Object >> shallowCopy<br>   <span> </span>| class newObject index |<br>   <span> </span><primitive: 148><br>   <span> </span>class := self class.<br>   <span> </span>class isVariable<br>       <span> </span>ifTrue:<span> </span><br>           <span> </span>[index := self basicSize.<br>           <span> </span>newObject := class basicNew: index.<br>           <span> </span>[index > 0]<br>               <span> </span>whileTrue:<span> </span><br>                   <span> </span>[newObject basicAt: index put: (self basicAt: index).<br>                   <span> </span>index := index - 1]]<br>       <span> </span>ifFalse: [newObject := class basicNew].<br>   <span> </span>index := class instSize.<br>   <span> </span>[index > 0]<br>       <span> </span>whileTrue:<span> </span><br>           <span> </span>[newObject instVarAt: index put: (self instVarAt: index).<br>           <span> </span>index := index - 1].<br>   <span> </span>^ newObject<br><div><br></div><div>The code of the primitiveClone looks the same [1]</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div class="gmail_quote"><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div></div><div>Changing `Context>copyTo:` by adding a `self pc` before calling `self copy` leads to no more crashes. Not sure if there is a reason for that or just plain luck.<br></div><div><br></div><div>A simple reduced stack is below (more details in this issue [1]). The crash happens always with contexts reified as objects (in this case 0x1206b6990 s [] in GtExamplesCommandLineHandler>runPackages). </div><div>Could this suggest some kind of issue in the vm when reifying contexts, or just some other problem with memory corruption?</div></div></blockquote><div><br></div><div>This looks like an oversight in some primitive.  Here for example is the implementation of the shallowCopy primitive, a.k.a. clone, and you can see where it explcitly intercepts access to a context.</div><div><br></div><div><div>primitiveClone</div><div><span style="white-space:pre-wrap">     </span>"Return a shallow copy of the receiver.</div><div><span style="white-space:pre-wrap">     </span><span> </span>Special-case non-single contexts (because of context-to-stack mapping).</div><div><span style="white-space:pre-wrap">       </span><span> </span>Can't fail for contexts cuz of image context instantiation code (sigh)."</div><div><br></div><div><span style="white-space:pre-wrap">    </span>| rcvr newCopy |</div><div><span style="white-space:pre-wrap"> </span>rcvr := self stackTop.</div><div><span style="white-space:pre-wrap">   </span>(objectMemory isImmediate: rcvr)</div><div><span style="white-space:pre-wrap">         </span>ifTrue:</div><div><span style="white-space:pre-wrap">                  </span>[newCopy := rcvr]</div><div><span style="white-space:pre-wrap">                </span>ifFalse:</div><div><span style="white-space:pre-wrap">                 </span>[(objectMemory isContextNonImm: rcvr)</div><div><span style="white-space:pre-wrap">                            </span>ifTrue:</div><div><span style="white-space:pre-wrap">                                  </span>[newCopy := self cloneContext: rcvr]</div><div><span style="white-space:pre-wrap">                             </span>ifFalse:</div><div><span style="white-space:pre-wrap">                                 </span>[(argumentCount = 0</div><div><span style="white-space:pre-wrap">                                      </span><span> </span> or: [(objectMemory isForwarded: rcvr) not])</div><div><span style="white-space:pre-wrap">                                         </span>ifTrue: [newCopy := objectMemory clone: rcvr]</div><div><span style="white-space:pre-wrap">                                            </span>ifFalse: [newCopy := 0]].</div><div><span style="white-space:pre-wrap">                        </span>newCopy = 0 ifTrue:</div><div><span style="white-space:pre-wrap">                              </span>[^self primitiveFailFor: PrimErrNoMemory]].</div><div><span style="white-space:pre-wrap">      </span>self pop: argumentCount + 1 thenPush: newCopy</div></div><div><br></div><div>But since Squeak doesn't have copyTo: I have no idea what primitive is being used.  I'm guessing 168 primitiveCopyObject, which seems to check for a Context receiver, but not for a CompiledCode receiver.  What does the primitive failure code look like?  Can you post the copyTo: implementations here please?</div></div></div></div></div></blockquote><div><br></div><div>The code is above. I also see Context>>#copyTo: in Squeak calling also Object>>copy for contexts.</div><div><br></div><div><div dir="ltr"><div>When a crash happens we don't get the exact same error all the time. For example we get most often on mac:</div><div><br></div><div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">Process 35690 stopped</span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">* thread #1, queue =<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">'com.apple.main-thread'</span><span style="font-variant-ligatures:no-common-ligatures">, stop reason =<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(180,36,25)">EXC_BAD_ACCESS (code=EXC_I386_GPFLT)</span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(159,160,28)"><span style="font-variant-ligatures:no-common-ligatures"><span>   <span> </span></span>frame #0:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures">0x00000001100b1004</span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">-><span> <span> </span></span>0x1100b1004: inl<span>   <span> </span></span>$0x4c, %eax</span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures"><span>   <span> </span></span>0x1100b1006: leal<span> </span><span> <span> </span></span>-0x5c(%rip), %eax</span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures"><span>   <span> </span></span>0x1100b100c: pushq<span> <span> </span></span>%r8</span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures"><span>   <span> </span></span>0x1100b100e: movabsq $0x1109e78e0, %r9<span> </span><span>       <span> </span></span>; imm = 0x1109E78E0<span> </span></span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">Target 0: (GlamorousToolkit) stopped.</span></div></div><div><br></div></div><div><br></div><div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">Process 29929 stopped</span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(180,36,25)"><span style="font-variant-ligatures:no-common-ligatures">* thread #1, queue =<span> </span></span><span style="font-variant-ligatures:no-common-ligatures;color:rgb(47,180,29)">'com.apple.main-thread'</span><span style="font-variant-ligatures:no-common-ligatures">, stop reason =<span> </span></span><span style="font-variant-ligatures:no-common-ligatures">EXC_BREAKPOINT (code=EXC_I386_BPT, subcode=0x0)</span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;color:rgb(159,160,28)"><span style="font-variant-ligatures:no-common-ligatures"><span>   <span> </span></span>frame #0:<span> </span></span><span style="font-variant-ligatures:no-common-ligatures">0x00000001100fe7ed</span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">-><span> <span> </span></span>0x1100fe7ed: int3<span>   </span></span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures"><span>   <span> </span></span>0x1100fe7ee: int3<span>   </span></span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures"><span>   <span> </span></span>0x1100fe7ef: int3<span>   </span></span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures"><span>   <span> </span></span>0x1100fe7f0: int3<span>   </span></span></div><div style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"><span style="font-variant-ligatures:no-common-ligatures">Target 0: (GlamorousToolkit) stopped.</span></div><p style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo"></p></div></div><div><br></div><div>[1] <a href="https://github.com/feenkcom/opensmalltalk-vm/blob/5f7d49227c9599a35fcb93892b727c93a573482c/smalltalksrc/VMMaker/StackInterpreterPrimitives.class.st#L325" target="_blank">https://github.com/feenkcom/opensmalltalk-vm/blob/5f7d49227c9599a35fcb93892b727c93a573482c/smalltalksrc/VMMaker/StackInterpreterPrimitives.class.st#L325</a><br></div><div><br></div><div>Cheers,</div><div>Andrei</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div class="gmail_quote"><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><pre style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:11.9px;margin-top:0px;margin-bottom:16px;padding:16px;overflow:auto;line-height:1.45;background-color:rgb(246,248,250);border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-right-radius:6px;border-bottom-left-radius:6px;color:rgb(36,41,46)"><code style="box-sizing:border-box;font-family:SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;font-size:11.9px;padding:0px;margin:0px;border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-right-radius:6px;border-bottom-left-radius:6px;word-break:normal;border:0px;display:inline;overflow:visible;line-height:inherit"> 0x7ffeefbb4380 M Context(Object)>copy 0x1206b6990: a(n) Context
    0x7ffeefbb43b8 M Context>copyTo: 0x1206b6990: a(n) Context
    0x7ffeefbb4400 M Context>copyTo: 0x1206b5ae0: a(n) Context
  ...
    0x7ffeefba6078 M Context>copyTo: 0x110548b28: a(n) Context
    0x7ffeefba60d0 I Context>copyTo: 0x110548a70: a(n) Context
    0x7ffeefba6118 I MessageNotUnderstood(Exception)>freezeUpTo: 0x110548a20: a(n) MessageNotUnderstood
    0x7ffeefba6160 I MessageNotUnderstood(Exception)>freeze 0x110548a20: a(n) MessageNotUnderstood
    0x7ffeefba6190 M [] in GtExampleEvaluator>result 0x110544fb8: a(n) GtExampleEvaluator
    0x7ffeefba61c8 M BlockClosure>cull: 0x110545188: a(n) BlockClosure
    0x7ffeefba6208 M Context>evaluateSignal: 0x110548c98: a(n) Context
    0x7ffeefba6240 M Context>handleSignal: 0x110548c98: a(n) Context
    0x7ffeefba6278 M Context>handleSignal: 0x110548be0: a(n) Context
    0x7ffeefba62b0 M MessageNotUnderstood(Exception)>signal 0x110548a20: a(n) MessageNotUnderstood
    0x7ffeefba62f0 M GtDummyExamplesWithInheritanceSubclassB(Object)>doesNotUnderstand: exampleH 0x1105487d8: a(n) GtDummyExamplesWithInheritanceSubclassB
    0x7ffeefba6328 M GtExampleEvaluator>primitiveProcessExample:withEvaluationContext: 0x110544fb8: a(n) GtExampleEvaluator
 ...
    0x7ffeefbe64d0 M [] in GtExamplesHDReport class(HDReport class)>runPackages: 0x1145e41c8: a(n) GtExamplesHDReport class
    0x7ffeefbe6520 M [] in Set>collect: 0x1206b5ab0: a(n) Set
    0x7ffeefbe6568 M Array(SequenceableCollection)>do: 0x1206b5c50: a(n) Array
       0x1206b5b98 s Set>collect:
       0x1206b5ae0 s GtExamplesHDReport class(HDReport class)>runPackages:
       0x1206b6990 s [] in GtExamplesCommandLineHandler>runPackages
       0x1206b6a48 s BlockClosure>ensure:
       0x1206b6b68 s UIManager class>nonInteractiveDuring:
       0x1206b6c48 s GtExamplesCommandLineHandler>runPackages
       0x1206b6d98 s GtExamplesCommandLineHandler>activate
       0x1206b75d0 s GtExamplesCommandLineHandler class(CommandLineHandler class)>activateWith:
       0x1207d2f00 s [] in PharoCommandLineHandler(BasicCommandLineHandler)>activateSubCommand:
       0x1207e6620 s BlockClosure>on:do:
       0x1207f7ab8 s PharoCommandLineHandler(BasicCommandLineHandler)>activateSubCommand:
       0x120809d40 s PharoCommandLineHandler(BasicCommandLineHandler)>handleSubcommand
       0x12082ca60 s PharoCommandLineHandler(BasicCommandLineHandler)>handleArgument:
       0x120789938 s [] in PharoCommandLineHandler(BasicCommandLineHandler)>activate
       0x1207a83e0 s BlockClosure>on:do:
       0x1207b57a0 s [] in PharoCommandLineHandler(BasicCommandLineHandler)>activate
       0x1207bf830 s [] in BlockClosure>newProcess</code></pre></div><div>Cheers,</div><div>Andrei</div><div><br></div><div><br></div><div>[1] <a href="https://github.com/feenkcom/gtoolkit/issues/1440" target="_blank">https://github.com/feenkcom/gtoolkit/issues/1440</a></div><div><br></div></div></blockquote></div><br clear="all"><div><br></div>--<span> </span><br><div dir="ltr"><div dir="ltr"><div><span style="font-size:small;border-collapse:separate"><div>_,,,^..^,,,_<br></div><div>best, Eliot</div></span></div></div></div></div></div></div></blockquote></div></div></blockquote></div><br clear="all"><div><br></div>--<span> </span><br><div dir="ltr"><div dir="ltr"><div><span style="font-size:small;border-collapse:separate"><div>_,,,^..^,,,_<br></div><div>best, Eliot</div></span></div></div></div></div></div></div></blockquote></div></span></div></blockquote></div></div></div></blockquote></div></div></span></div></blockquote><br><div><span style="background-color:rgba(255,255,255,0)">_,,,^..^</span><span style="background-color:rgba(255,255,255,0)">,,,_ (phone)</span></div></div></div></blockquote></div><br></div></div></blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><span style="font-size:small;border-collapse:separate"><div>_,,,^..^,,,_<br></div><div>best, Eliot</div></span></div></div></div></div>