[Bug middle-end/83239] False positive from -Wstringop-overflow on simple std::vector code

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83239

--- Comment #22 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The new trunk/gcc/testsuite/g++.dg/pr83239.C test has started failing, due to a
change I made to std::vector, see PR 86153