[Bug tree-optimization/109717] -Warray-bound error with gnu++20 and fmt library

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109717

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And requiring every library to annotate every assumption causes regressions
like PR 109703, where the cure is worse than the disease.

A wrong-code bug is worse than a false positive warning, but the warnings are
forcing people to modify correct code.