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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/105723] Optimization false positive warning
Date: Wed, 25 May 2022 07:34:20 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105723

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
          Component|c++                         |libstdc++

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
In file included from
/opt/compiler-explorer/gcc-12.1.0/include/c++/12.1.0/algorithm:61,
                 from <source>:1:
In function '_OIter std::transform(_IIter, _IIter, _OIter, _UnaryOperation)
[with _IIter =3D reverse_iterator<__gnu_cxx::__normal_iterator<unsigned cha=
r*,
vector<unsigned char> > >; _OIter =3D
reverse_iterator<__gnu_cxx::__normal_iterator<unsigned char*, vector<unsign=
ed
char> > >; _UnaryOperation =3D some_func(const uint8_t*
const&)::<lambda(uint8_t)>]',
    inlined from 'void some_func(const uint8_t* const&)' at <source>:15:23:
/opt/compiler-explorer/gcc-12.1.0/include/c++/12.1.0/bits/stl_algo.h:4263:1=
9:
error: writing 1 byte into a region of size 0 [-Werror=3Dstringop-overflow=
=3D]
 4263 |         *__result =3D __unary_op(*__first);
      |         ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
compilation terminated due to -Wfatal-errors.
cc1plus: some warnings being treated as errors
Compiler returned: 1=