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<p>Hi Eliot,</p>
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<p>thanks for the fix! Sorry for raising the same question again, but wouldn't it still be safer to dispense with the #isArray call here? It allows the simulated code to break out of the simulation by overriding #isArray anywhere. I think I posted a proof of
concept here: <a href="http://forum.world.st/The-Trunk-Kernel-eem-1366-mcz-tp5126558p5126713.html" class="x_OWAAutoLink" id="LPlnk461878">http://forum.world.st/The-Trunk-Kernel-eem-1366-mcz-tp5126558p5126713.html</a> :-)</p>
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Best,
<div>Christoph
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>Von:</b> Squeak-dev <squeak-dev-bounces@lists.squeakfoundation.org> im Auftrag von commits@source.squeak.org <commits@source.squeak.org><br>
<b>Gesendet:</b> Dienstag, 2. Februar 2021 03:57:12<br>
<b>An:</b> squeak-dev@lists.squeakfoundation.org; packages@lists.squeakfoundation.org<br>
<b>Betreff:</b> [squeak-dev] The Trunk: Kernel-eem.1367.mcz</font>
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<div class="PlainText">Eliot Miranda uploaded a new version of Kernel to project The Trunk:<br>
<a href="http://source.squeak.org/trunk/Kernel-eem.1367.mcz">http://source.squeak.org/trunk/Kernel-eem.1367.mcz</a><br>
<br>
==================== Summary ====================<br>
<br>
Name: Kernel-eem.1367<br>
Author: eem<br>
Time: 1 February 2021, 6:57:09.713484 pm<br>
UUID: def9aaa1-eb71-4da5-8f86-85856d9b88ad<br>
Ancestors: Kernel-eem.1366<br>
<br>
Fix mistake in the previous commit. Thanks Levente!<br>
<br>
=============== Diff against Kernel-eem.1366 ===============<br>
<br>
Item was changed:<br>
----- Method: Context>>isPrimFailToken: (in category 'private') -----<br>
+ isPrimFailToken: contextOrPrimFailToken<br>
+ "Answer if contextOrPrimFailToken, which will either be a Context object or<br>
+ a primitive fail token (a tuple of the PrimitiveFailToken unique object and<br>
+ a primitive failure code), is the latter. This should only be used with the<br>
+ (possibly indirect) results of Context>>doPrimitive:method:receiver:args:"<br>
+ ^contextOrPrimFailToken isArray<br>
+ and: [contextOrPrimFailToken size = 2<br>
+ and: [(contextOrPrimFailToken at: 1) == PrimitiveFailToken]]!<br>
- isPrimFailToken: anObject<br>
- ^(self objectClass: anObject) isArray<br>
- and: [anObject size = 2<br>
- and: [(anObject at: 1) == PrimitiveFailToken]]!<br>
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