https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67066
--- Comment #5 from Eric Gallager <egall at gwmail dot gwu.edu> --- (In reply to Jonathan Wakely from comment #3) > Are you playing "use as many configure options as possible"? Yeah, basically (as many interesting-looking ones as possible, at least). I can confirm that removing the --enable-concept-checks flag works.
