https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72752
--- Comment #15 from Paolo Carlini <paolo.carlini at oracle dot com> --- Thanks for the new bug. Note that this bug is marked as [6 Regression] and still open, thus isn't surprising at all that some or even all the testcases here fail in 6, actually it's expected. If you have testcases failing in 7 or 8, please open new bugs, for clarity. Thanks a lot again for your help!