[Bug tree-optimization/107927] vector::push_back gives array bounds warning with optimization and undefined sanitizer

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107927

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2022-11-30

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I can't seem to reproduce with the unreduced non-preprocessed source?  In the
reduced testcase there's

void _M_range_initialize(_ForwardIterator __first, _ForwardIterator __last,
                           random_access_iterator_tag) {
    size_type __n;
    _M_impl._M_start =
        _M_allocate(_S_check_init_len(__n, _M_get_Tp_allocator()));

so __n is clearly uninitialized.