[Bug libstdc++/65033] C++11 atomics: is_lock_free result does not always match the real lock-free property

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65033

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See PR54005 for some of the history.