[Bug libstdc++/122380] [15/16 regression] std::variant with std::vectors of differing types may lead to double frees

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122380

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The reverse test would be to compile using GCC 15.2.0 and add -save-temps

But when compiling that .ii with GCC 14 you'll also need to add these options:

-D__builtin_operator_delete="::operator delete"
-D__builtin_operator_new="::operator new"

That's to work around a backwards-incompatible change in the GCC 15 headers
which can't be compiled by GCC 14.