[Bug libstdc++/88782] Crash when mixing make_shared from gcc <= 8.2 with make_shared from gcc >= 8.3

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88782

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That's wrong in exactly the cases r266380 was meant to solve.