Ah, thank you. If it can just do the equivalent of WARN_ON_ONCE(…) and continue, and the check wouldn’t be slow enough to make people disable it, then yeah, that sounds really good.
Supposedly ~5% (1-29%), but I'm testing my own projects to verify (my guess is higher at 10-20%, but will depend on the code). Supposedly it's to land in gcc at some point but I dunno the time table.
