Regressions on trunk at revision 259231 vs revision 259227

[H.J. Lu x32]

New failures:
FAIL: g++.dg/pr80463.C  -std=gnu++11 (test for excess errors)
FAIL: g++.dg/pr80463.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/pr80463.C  -std=gnu++98 (test for excess errors)

New passes: