[Vm-dev] BitBltSimulation buffer overrun

Nicolas Cellier nicolas.cellier.aka.nice at gmail.com
Tue Sep 3 21:44:50 UTC 2019

Hi all,
while running a debug squeak.cog.spur macos x64, I noticed repeated logs in

> (((usqInt)sourceIndex)) < endOfSource 2132

This corresponds to failing assert: in BitBltSimulation slang

    srcLongAt: idx
         <inline: #always>
         self assert: idx asUnsignedInteger < endOfSource.
         ^self long32At: idx

Maybe it's a well known bug, but it's easy to trigger if you are after it:
Open Squeak5.1-16548-64bit.image (I took that of nsboot while testing
failing Newspeak bootstrap
Open TestRunner and run all tests...
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