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bug#49415: ‘Internal compiler error: Segmentation fault’ when building a

From: Ludovic Courtès
Subject: bug#49415: ‘Internal compiler error: Segmentation fault’ when building aarch64-linux-gnu cross-compiler [core-updates]
Date: Tue, 06 Jul 2021 12:13:16 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux)


Maxime Devos <maximedevos@telenet.be> skribis:

> While testing a patch re-introducing %build-inputs when cross-compiling
> (probably irrelevant to the build failure though), I encountered an ICE
> (internal compiler error).  I checked 'dmesg'; it is not an OOM.
> I believe I encountered similar errors in the past, though they disappeared
> when I retried the build, so this looks like a non-determenistic build
> failure.


> -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall 
> -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag
> -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long 
> -Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H -I. -I. 
> -I../../gcc-10.3.0/gcc -I../../gcc-10.3.0/gcc/.
> -I../../gcc-10.3.0/gcc/../include -I../../gcc-10.3.0/gcc/../libcpp/include  
> -I../../gcc-10.3.0/gcc/../libdecnumber 
> -I../../gcc-10.3.0/gcc/../libdecnumber/dpd -I../libdecnumber -I../../gcc-
> 10.3.0/gcc/../libbacktrace   -o tree-ssa-structalias.o -MT 
> tree-ssa-structalias.o -MMD -MP -MF ./.deps/tree-ssa-structalias.TPo 
> ../../gcc-10.3.0/gcc/tree-ssa-structalias.c
> during RTL pass: vartrack
> ../../gcc-10.3.0/gcc/tree-ssa-strlen.c: In function ‘void 
> maybe_warn_overflow(gimple*, tree, const vr_values*, strinfo*, bool, bool)’:
> ../../gcc-10.3.0/gcc/tree-ssa-strlen.c:2336:1: internal compiler error: 
> Segmentation fault
>  2336 | }
>       | ^
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <https://gcc.gnu.org/bugs/> for instructions.
> make[2]: *** [Makefile:1117: tree-ssa-strlen.o] Error 1

I built it a few times in recent days (from x86_64-linux) and did not
experience this bug (didn’t see it on ci.guix either).  So yes, maybe
it’s a non-deterministic bug?


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