https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101087
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Marek Polacek <mpola...@gcc.gnu.org>: https://gcc.gnu.org/g:cbef732522568f8adce46c472b16391c864d0fd0 commit r11-8709-gcbef732522568f8adce46c472b16391c864d0fd0 Author: Marek Polacek <pola...@redhat.com> Date: Wed Jul 7 20:02:18 2021 -0400 c++: Fix noexcept with unevaluated operand [PR101087] It sounds plausible that this assert int f(); static_assert(noexcept(sizeof(f()))); should pass: sizeof produces a std::size_t and its operand is not evaluated, so it can't throw. noexcept should only evaluate to false for potentially evaluated operands. Therefore I think that check_noexcept_r shouldn't walk into operands of sizeof/decltype/ alignof/typeof. PR c++/101087 gcc/cp/ChangeLog: * cp-tree.h (unevaluated_p): New. * except.c (check_noexcept_r): Use it. Don't walk into unevaluated operands. gcc/testsuite/ChangeLog: * g++.dg/cpp0x/noexcept70.C: New test. (cherry picked from commit dee00bf6894be0cabb8f263c993357a6f8444f8b)
