[Bug sanitizer/69204] ThreadSanitizer: False positive on std::promise usage

[bugzil...@reto-schneider.ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69204

--- Comment #7 from bugzil...@reto-schneider.ch ---
I did some bisecting. r219770 is the commit which breaks my example.