https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119497
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #0) > Another way to word it could be: > > note: failed assertion is not a constant expression: '...' Actually maybe not this, because it might lead people to think that the actual condition was not constant, whereas the problem is that the condition is false.