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-Wstringop-overflow in GCC 12.1 at -O3 (not reproducible in GCC trunk) #2989

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hgkjshegfskef opened this issue Jul 16, 2022 · 2 comments
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-Wstringop-overflow in GCC 12.1 at -O3 (not reproducible in GCC trunk) #2989

hgkjshegfskef opened this issue Jul 16, 2022 · 2 comments

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@hgkjshegfskef
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hgkjshegfskef commented Jul 16, 2022 •
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fmtlib: trunk
Repro: https://godbolt.org/z/7YM9oY4cj

Perhaps this is just to add to the collection of bogus -Wstringop-overflow warnings. Unless I'm using the library incorrectly. Seems to be fixed in GCC trunk (future version 13?). Note that the warning does not appear at -O2 and lower.
@vitaut
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vitaut commented Jul 16, 2022

This looks like a false positive which is fixed in the latest gcc so I don't think we should do anything about it. You can suppress the warning with FMT_SYSTEM_HEADERS or some other method.

@vitaut vitaut closed this as completed Jul 16, 2022
codeinred added a commit to codeinred/fmt that referenced this issue Mar 3, 2023
@codeinred
Fix code causing spurious Wstringop-overflow warning
46ae7ea 
See fmtlib#2989, fmtlib#3054, and others
@codeinred codeinred mentioned this issue Mar 3, 2023
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vitaut pushed a commit that referenced this issue Mar 18, 2023
@codeinred @vitaut
Fix code causing spurious Wstringop-overflow warning
d9bc5f1 
See #2989, #3054, and others
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vitaut commented Mar 18, 2023

Worked around in d9bc5f1.

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