Regressions on trunk at revision 248074 vs revision 248064

[H.J. Lu Intel64]

New failures:
FAIL: g++.dg/cpp1z/nested-namespace-def1.C    (test for errors, line 14)
FAIL: g++.dg/cpp1z/nested-namespace-def1.C    (test for errors, line 14)
FAIL: g++.dg/cpp1z/nested-namespace-def1.C   (test for excess errors)
FAIL: g++.dg/cpp1z/nested-namespace-def1.C   (test for excess errors)

New passes:
FAIL: gfortran.dg/operator_1.f90   -O0  execution test