Regressions on trunk at revision 174804 vs revision 174801

[H.J. Lu ia32]

New failures:
FAIL: 20_util/unique_ptr/cons/pointer_array.cc (test for excess errors)
FAIL: 23_containers/map/modifiers/insert/3.cc (test for excess errors)
FAIL: 23_containers/multiset/requirements/exception/generation_prohibited.cc (test for excess errors)

New passes:
FAIL: 24_iterators/operations/next.cc (test for excess errors)
FAIL: 24_iterators/operations/prev.cc (test for excess errors)
FAIL: ext/throw_value/cons.cc (test for excess errors)