[Webkit-unassigned] [Bug 279285] JSC::IndexingHeader::preCapacity: SIGSEGV

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=279285

--- Comment #17 from Michael Orlitzky <michael at orlitzky.com> ---
(In reply to Michael Catanzaro from comment #16)
> And specifically only at -O2 optimization level, so that narrows things down
> significantly. It could be a GCC bug, or it could be undefined behavior in
> JSC.
> 
> Since almost all distros build with GCC and -O2, yet only you are
> complaining, it might also occur only in combination with one of the other
> compiler flags you use.

My CFLAGS are "-O2 -pipe -mabi=lp64d -march=rv64gc -mtune=thead-c906" which should be unexciting except maybe for the -mtune=thead-c906. AFAIK it only provides a few optimization hints:

https://gcc.gnu.org/pipermail/gcc-patches/2021-June/573305.html

I've just upgraded to gcc-14.2.1 and was planning to re-try; I could drop the -mtune at the same time.

I think the most likely explanation is that few people are using RISC-V, and fewer of those are using epiphany, and fewer of those are building their own, and fewer of those are using the latest versions of everything, and fewer of those would be willing to spend a few days rebuilding webkit to debug if it crashes. We may be down to {me}.

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