Regressions on trunk at revision 259250 vs revision 259231

[H.J. Lu ia32]

New failures:

New passes:
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)