On Feb 17 2023, Alejandro Colomar via Gcc wrote: > C2x (N3054 is the latest I know): > > If a pointer value is used in an evaluation after > the object the pointer points to (or just past) > reaches the end of its lifetime, > the behavior is undefined. > <https://www.open-std.org/JTC1/SC22/WG14/www/docs/n3054.pdf#subsection.6.2.4> > > > This new wording doesn't even allow one to use memcmp(3); > just reading the pointer value, however you do it, is UB.
But memcmp does not read the value, it reads the object representation, and reading the representation is never UB. -- Andreas Schwab, sch...@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."
