Regressions on trunk at revision 263445 vs revision 263433

[H.J. Lu (ia32 Core i7)]

New failures:

New passes:
FAIL: g++.old-deja/g++.mike/p784.C  -std=gnu++11 (test for excess errors)
FAIL: g++.old-deja/g++.mike/p784.C  -std=gnu++14 (test for excess errors)
FAIL: g++.old-deja/g++.mike/p784.C  -std=gnu++98 (test for excess errors)