[Bug libstdc++/98449] [DR 3343] notify_all_at_thread_exit() should notify on cond while lock is held to avoid a race

[vini.ipsmaker at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98449

--- Comment #3 from Vinícius dos Santos Oliveira <vini.ipsmaker at gmail dot 
com> ---
LLVM's libcxx already applied this 1-line patchset:
https://github.com/llvm/llvm-project/commit/64fc3cd55d586498dd21c5b3cfaa755793913772

Can we have the same here on GCC side (I've already submitted the patch
earlier).