https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123180
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Keywords| |wrong-code
Last reconfirmed| |2025-12-18
Status|UNCONFIRMED |NEW
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Indeed, this code was adapted from std::stable_sort where it's correct:
if (__builtin_expect(__buf.size() == __buf._M_requested_size(), true))
std::__merge_adaptive
(__first, __middle, __last, __len1, __len2, __buf.begin(), __comp);
else if (__builtin_expect(__buf.begin() == 0, false))
std::__merge_without_buffer
(__first, __middle, __last, __len1, __len2, __comp);
else
