https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88332
--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> --- "target pdp11*-*-*" is the _comment_ argument to dg-error here as written; that's why it is displayed in the summary like that, too. I don't see why it doesn't fail on most systems though, hrm. FWIW, I'll update gcc110 to centos 7.6 some time soon (from 7.4).