<body><div id="__MailbirdStyleContent" style="font-size: 10pt;font-family: Arial;color: #000000;text-align: left" dir="ltr">
Hi Christoph --<div><br></div><div>If would be nice if we could integrate some of the proposed fixes from you and Jaromir into Trunk/6.0.</div><div><br></div><div>Best,</div><div>Marcel</div><div class="mb_sig"></div><blockquote class='history_container' type='cite' style='border-left-style:solid;border-width:1px; margin-top:20px; margin-left:0px;padding-left:10px;'>
<p style='color: #AAAAAA; margin-top: 10px;'>Am 04.05.2022 19:59:59 schrieb Thiede, Christoph <christoph.thiede@student.hpi.uni-potsdam.de>:</p><div style='font-family:Arial,Helvetica,sans-serif'>
<div id="divtagdefaultwrapper" style="font-size: 12pt;color: #000000;font-family: Calibri,Helvetica,sans-serif" dir="ltr">
<p><br>
</p>
<div dir="ltr">
<div id="x_divtagdefaultwrapper" dir="ltr" style="font-size: 12pt;color: rgb(0, 0, 0);font-family: Calibri, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols">
<p>Hi Lauren,</p>
<p><br>
</p>
<p>I think this issue has already been discussed in <span>Kernel-ct.1405 et al. (Squeak Inbox Talk might be a nice way to find all related discussions to "BlockCannotReturn"). What do you think about the solutions proposed there? :-)</span></p>
<p><span><br>
</span></p>
<p><span>Best,</span></p>
<p><span>Christoph</span></p>
</div>
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="x_divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif;color: #000000"><b>Von:</b> Squeak-dev <squeak-dev-bounces@lists.squeakfoundation.org> im Auftrag von Lauren Pullen <drurowin@gmail.com><br>
<b>Gesendet:</b> Donnerstag, 28. April 2022 07:25:44<br>
<b>An:</b> squeak-dev@lists.squeakfoundation.org<br>
<b>Betreff:</b> [squeak-dev] SIGTRAP when Proceeding from BlockCannotReturn</span>
<div> </div>
</div>
</div>
<span style="font-size: 10pt"><span style="font-size: 10pt">
<div class="PlainText">I found a VM crash while doing my UI testing.<br>
<br>
platform sources revision VM: 202204190959<br>
runner@Mac-1650369142700.local:work/opensmalltalk-vm/opensmalltalk-vm<br>
Date: Tue Apr 19 11:59:48 2022 CommitHash: 2a0e785 Plugins: 202204190959<br>
runner@Mac-1650369142700.local:work/opensmalltalk-vm/opensmalltalk-vm<br>
<br>
If you make the novice mistake of putting a ^ in a block and evaluating<br>
that block after the method returns, a debugger window helpfully appears<br>
saying BlockCannotReturn.<br>
<br>
If you press Proceed the OS will kill Squeak. No crash.dmp file is<br>
created for this crash.<br>
<br>
The debugger does not respect the value of #isResumable (which<br>
BlockCannotReturn returns true for, by the way) and always permits the<br>
user to resume the operation using the Proceed button. I believe there<br>
is a method on Exception that also disregards #isResumable To force an<br>
operation to never proceed you must return the Exception after signaling it.<br>
<br>
Where is the best place to fix this? We can make the debugger respect<br>
#isResumable and set BlockCannotReturn to return false. We can also<br>
make Context>>cannotReturn:to: never return normally. We can also catch<br>
nil in the VM.<br>
<br>
</div>
</span></span></div>
</div></blockquote>
</div></body>