[Webkit-unassigned] [Bug 200863] Crash in JSC::SlotVisitor::visitChildren

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=200863

--- Comment #27 from Krzysztof Konopko <kris at youview.com> ---
Interestingly, in order to try out the latest WebKit code on our AArch64 platform, I had to switch from GCC 8.x to GCC 9.x.  Just by doing that and without changing anything else, I can no longer reproduce the issue in any way, while with GCC 8.x the very same thing makes it fairly easy to reproduce the crash.

It's conceivable that GCC could have a bug fixed in 9.x, yet I was not able to reproduce the crash on RPi3 AArch64 after I built the same WPE 2.34.7 with the same GCC 8.x.

Also, as indicated in Comment #8, Valgrind warns about using uninitialised values originating on the stack, which comes from the latest WebKit main branch built with GCC 12.x for x86_64.

So yeah, could be that GCC 9.x changes the timings but the issue remains buried even deeper, or maybe it's the issue with GCC 8.x.  Yet to be found.

Also Michael claimed in Comment #12 that he can "see this crash every once in a while", presumably on a more recent (?) WebKit and on x86_64 (?)

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