<div>It's very simple.<br></div><div><br></div><div>1. Sit down at your desk.<br></div><div>2. Check to make sure that your desk is wood. Concrete is not a wise choice.<br></div><div>3. Move everything of value to further than an arms reach.<br></div><div>4. Slam your head into the desk until you head drives itself through and leaves a head shaped hole.<br></div><div>5. Start gdb. At this point gdb will make sense.<br></div><div><br></div><div><br></div><div ><br></div><div class="ik_mail_quote"><div>On 2021-12-28T19:25:21.000+01:00, tim Rowledge <tim@rowledge.org> wrote:</div><blockquote class="ws-ng-quote"><pre style="white-space: normal;">OK, so I guess the most likely issue is some edge case in the ARM fastblt path. What fun; time to try to remember how to use gdb.<br><br><blockquote class="ws-ng-quote"> On 2021-12-28, at 1:40 AM, Bruce O'Neel <<a target="_blank" class="defaultMailLink" href="mailto:bruce.oneel@pckswarms.ch">bruce.oneel@pckswarms.ch</a>> wrote:<br> <br> HI,<br> <br> I can repeat this on ARMv8 linux, but both ARMv6 linux and x86-64 linux are ok.<br> <br> In my case the VM is self built from this commit hash<br> <br> Date: Mon Dec 20 22:21:04 2021 CommitHash: 0cfe6c72e<br> <br> using gcc 7.5.0 on a Ubuntu 18.04.6 system so not identical to Tim's.<br> <br> cheers<br> <br> bruce<br> On 2021-12-28T03:58:19.000+01:00, David T. Lewis <<a target="_blank" class="defaultMailLink" href="mailto:lewis@mail.msen.com">lewis@mail.msen.com</a>> wrote:<br> On Mon, Dec 27, 2021 at 05:21:16PM -0800, tim Rowledge wrote:<br> I was just trying out a workspace in an MVC project for reasons and discovered that (even with the latest sqcogspur64ARMv8linuxht/lib/squeak/5.0-202112201228-64bit/squeak VM) scrolling text in a workspace will cause a segfault. This is running on a PI 4, 64bit release of Raspberry Pi OS, 20892 image.<br> <br> To test - <br> open an MVC project<br> open a Workspace - the location on screen does not appear to matter<br> type a few characters with enough CRs to make the scrollbar suasage smaller than the scrollbar<br> scroll using the sausage.<br> boom<br> pro$it?<br> <br> <br><blockquote class="ws-ng-quote"> <snip><br></blockquote> <br> <br> Can anybody else see this? On any other cpu/OS?<br> <br> <br> No problem for me on Intel linux64x64. I'm using a locally compiled<br> VM but that is not likely to make a difference, so I expect that the<br> issue is somehow ARM related. My image is 20901 running on:<br> <br> Virtual Machine<br> ---------------<br> /usr/local/lib/squeak/5.0-202112202121-64bit/squeak<br> Open Smalltalk Cog[Spur] VM [CoInterpreterPrimitives * VMMaker.oscog-dtl.3123]<br> Unix built on Dec 27 2021 12:51:27 Compiler: 4.2.1 Compatible Clang 3.8.0 (tags/RELEASE_380/final)<br> platform sources revision VM: 202112202121 <a target="_blank" class="defaultMailLink" href="mailto:lewis@lewis-Gazelle-Pro">lewis@lewis-Gazelle-Pro</a>:squeak/git/opensmalltalk-vm Date: Mon Dec 20 22:21:04 2021 CommitHash: 0cfe6c7 Plugins: 202112202121 <a target="_blank" class="defaultMailLink" href="mailto:lewis@lewis-Gazelle-Pro">lewis@lewis-Gazelle-Pro</a>:squeak/git/opensmalltalk-vm<br> CoInterpreter * VMMaker.oscog-dtl.3123 uuid: a0d4db62-a6ac-4d9c-ba51-5eec2ce0c415 Dec 27 2021<br> StackToRegisterMappingCogit * VMMaker.oscog-dtl.3123 uuid: a0d4db62-a6ac-4d9c-ba51-5eec2ce0c415 Dec 27 2021<br> <br></blockquote> <br><br>tim<br>--<br>tim Rowledge; <a target="_blank" class="defaultMailLink" href="mailto:tim@rowledge.org">tim@rowledge.org</a>; <a target="_blank" class="defaultMailLink" href="http://www.rowledge.org/tim">http://www.rowledge.org/tim</a><br>If you don't pay the exorcist do you get repossessed?</pre></blockquote></div>