https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113772
--- Comment #3 from Iain Sandoe <iains at gcc dot gnu.org> --- extern pure nothrow @nogc @safe bool __atomic_always_lock_free(uint, shared(const(void))*); extern pure nothrow @nogc @safe bool __atomic_is_lock_free(uint, shared(const(void))*); perhaps there's a parameter type mismatch or sth?