stl_algobase.h:431: warning: 'void* __builtin_memcpy(void, const void, unsigned int)' reading between 8 and 2147483644 bytes from a region of size 4 [-Wstringop-overread]

redi at gcc dot gnu.org via Gcc-bugs Wed, 02 Apr 2025 08:25:14 -0700

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107087


--- Comment #21 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Ted Lyngmo from comment #20)
> I noticed something very similar that started with 12.4 and that is still
> there. I think it's a duplicate this ticket so I'll post here for you to
> decide.

No, that's nothing to do with the COW std::string and is a -Warray-bounds
warning, not a -Wstringop-overread warning. There are lots of other bugs about
-Warray-bounds though, see the meta-bug PR 56456.

[Bug tree-optimization/107087] [12 Regression] bits/stl_algobase.h:431: warning: 'void* __builtin_memcpy(void*, const void*, unsigned int)' reading between 8 and 2147483644 bytes from a region of size 4 [-Wstringop-overread]

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[Bug tree-optimization/107087] [12 Regression] bits/stl_algobase.h:431: warning: 'void* __builtin_memcpy(void, const void, unsigned int)' reading between 8 and 2147483644 bytes from a region of size 4 [-Wstringop-overread]