Regressions on trunk at revision 201886 vs revision 201880

[H.J. Lu Intel64 Core 2/i7]

New failures:
FAIL: 22_locale/money_get/get/char/1.cc (test for excess errors)
FAIL: 22_locale/money_get/get/wchar_t/1.cc (test for excess errors)
FAIL: 27_io/basic_filebuf/imbue/12206.cc (test for excess errors)
FAIL: 27_io/basic_stringbuf/sungetc/wchar_t/1.cc (test for excess errors)
FAIL: tr1/6_containers/unordered_multiset/erase/1.cc (test for excess errors)

New passes:
FAIL: 22_locale/num_get/get/char/12.cc (test for excess errors)
FAIL: 22_locale/time_get/get_date/wchar_t/3.cc (test for excess errors)
FAIL: 27_io/basic_stringbuf/cons/2020.cc (test for excess errors)
FAIL: decimal/make-decimal.cc (test for excess errors)
FAIL: ext/throw_allocator/check_allocate_max_size.cc (test for excess errors)
FAIL: tr1/5_numerical_facilities/special_functions/06_comp_ellint_3/compile_2.cc (test for excess errors)
FAIL: tr1/5_numerical_facilities/special_functions/11_cyl_neumann/compile_2.cc (test for excess errors)