https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91227
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> --- Yes, I meant &&. And yes, folding it either way is strictly valid in both C, where the result of the relational expression is undefined, and C++ where it's unspecified. But besides being inconsistent with the inequality (which is well-defined in both languages, except perhaps the dubious past-the-end case), knowing that the pointer cannot very well point into the local object, folding the relational expression to true would seem rather perverse. I wouldn't be surprised if it triggered (latent) bugs. Folding it to false, OTOH, seems safe,
