[Bug libstdc++/104442] atomic::wait incorrectly loops in case of spurious notification when __waiter is shared

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104442

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Tom submitted
https://gcc.gnu.org/pipermail/gcc-patches/2022-February/590050.html already,
which is slightly different.