https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97237
Bug ID: 97237 Summary: [10/11 Regression] static_assert does not accept fpermissive code Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: lutztonineubert at gmail dot com Target Milestone: --- The following valid code: constexpr bool test() { auto i = 1 << 132; return true; } static_assert(test()); Build with GCC -fpermissive does compile in GCC 9 but not in 10/11: > non-constant condition for static assertion See: https://gcc.godbolt.org/z/r85zvP But this code is valid in all versions: constexpr bool test() { auto i = 1 << 132; return true; } constexpr auto t = test(); static_assert(t);