[Bug libstdc++/100153] Undefined behavior in stl_bvector.h

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100153

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2021-04-20

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think the bug is that vector<bool>::shrink_to_fit() always allocates, even if
the new capacity is zero.

It should set _M_start._M_p == _M_end_of_storage == nullptr