https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88656
--- Comment #4 from gerd at egidy dot de --- (In reply to Richard Earnshaw from comment #3) > A regression is not a bug that applies in all previous releases. A > regression is where something worked in some previous releases but does not > work now. using __builtin_return_address(0) as described in the bug report worked in gcc 5.4.0 and before. To be more specific, it worked before the fix for bug 77933 was incorporated. So to me this is a regression.