Regressions on trunk at revision 202826 vs revision 202825

[H.J. Lu ia32 Core 2/i7]

New failures:
FAIL: 23_containers/unordered_set/buckets/swap.cc (test for excess errors)
FAIL: g++.old-deja/g++.ext/pretty3.C -std=c++11 (test for excess errors)
FAIL: g++.old-deja/g++.pt/repo4.C -std=gnu++98 (test for excess errors)
FAIL: libvtv.cc/register_set_pair.cc -O0 -fvtable-verify=std (test for excess errors)

New passes: