https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119497
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- Testcase: #include <assert.h> constexpr int foo(int i) { assert(i != 0); return 1; } constexpr int i = foo(0); We do already show the assert(...) macro in the caret diagnostic, so maybe this would be clear: a.cc:5:3: error: assertion failed: i != 0 5 | assert(i != 0); | ^~~~~~ a.cc:5:3: note: assertions must not fail when used in a constant expression And suppress any mention of __assert_fail, __assert_rtn etc. which are not meant to be implementation details of assert. This would be consistent with how we present static_assert failures: a.cc:11:15: error: static assertion failed: blah 11 | static_assert(false, "blah"); | ^~~~~