https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86842
--- Comment #4 from fiesh at zefix dot tv --- > So I'm strongly opposed to that part of the suggestion. Either you get all > the ABI-preserving debug checks, or none. Checking all (possible) preconditions without any limit on the introduced complexity might not be possible within reasonable time. Checking transitivity naively is O(N^3). Maybe there's a better way to check something is a strict weak ordering, but in general there might always be a sentence whose veracity cannot be established more efficiently. So if the library wanted to provide checks for every precondition that can be verified (which was my original proposition), I don't see how it's possible meaningfully without any restriction on the computational efforts spent.