https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93059
--- Comment #31 from Bernd Edlinger <bernd.edlinger at hotmail dot de> --- Yes, you usually need to make a full bootstrap / make check twice which the same svn revision one with and one without your patch. You also should make sure that the test case actually is able to fail before your patch. You run "$(srcdir)/contrib/test_summary -t" each time and compare the output.