https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86328
--- Comment #5 from janus at gcc dot gnu.org --- (In reply to janus from comment #4) > Bisection shows that this regression was introduced by Paul's r251949 on > 2017-09-10. I could verify that reverting the expr.c part of that commit does not cure the bug, so the problematic part must be somewhere in the trans* changes.