[Bug c++/104635] for loop optimized into infinite loop

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104635

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It isn't well-defined code though. It's undefined, as you yourself said. It
can't be both.