Regressions on trunk at revision 246835 vs revision 246830

[H.J. Lu Intel64]

New failures:

New passes:
FAIL: g++.dg/pr80374.C  -std=c++11 (test for excess errors)
FAIL: g++.dg/pr80374.C  -std=c++11 (test for excess errors)
FAIL: g++.dg/pr80374.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/pr80374.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/pr80374.C  -std=c++98 (test for excess errors)
FAIL: g++.dg/pr80374.C  -std=c++98 (test for excess errors)