[Bug libstdc++/60662] simple use of call_once throws a system_error exception, but not if sleep_for is called beforehand

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60662

--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Antoine Pitrou from comment #7)
> It seems this comment is mistaken as GCC 13.3, at least, still uses
> pthread_once for std::call_once:
> 
> > This should be fixed in GCC 11 which no longer uses pthread_once for 
> > std::call_once.

The comment was correct, but then the change was reverted.