Regressions on trunk at revision 193764 vs revision 193757

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

New failures:

New passes:
FAIL: 21_strings/basic_string/inserters_extractors/wchar_t/28277.cc execution test
FAIL: 23_containers/set/requirements/exception/generation_prohibited.cc (test for excess errors)
FAIL: 23_containers/set/requirements/typedefs.cc (test for excess errors)
FAIL: 23_containers/vector/bool/modifiers/insert/31370.cc execution test
FAIL: 23_containers/vector/bool/requirements/citerators.cc (test for excess errors)
FAIL: 26_numerics/random/student_t_distribution/requirements/explicit_instantiation/1.cc (test for excess errors)
FAIL: 27_io/basic_ostream/inserters_character/wchar_t/28277-3.cc execution test
FAIL: 27_io/basic_ostream/inserters_character/wchar_t/28277-4.cc execution test
FAIL: 27_io/ios_base/types/iostate/constexpr_operators.cc (test for excess errors)
FAIL: 27_io/ios_base/types/openmode/constexpr_operators.cc (test for excess errors)
FAIL: 28_regex/algorithms/regex_match/extended/string_range_01_03.cc (test for excess errors)
FAIL: 28_regex/algorithms/regex_match/extended/string_range_02_03.cc (test for excess errors)
FAIL: 28_regex/algorithms/regex_replace/char/51711.cc (test for excess errors)
FAIL: gcc.dg/c99-intconst-1.c (test for excess errors)
FAIL: gcc.dg/vect/vect-outer-2a-big-array.c execution test
FAIL: gfortran.dg/integer_exponentiation_4.f90  -O   (test for errors, line 24)
FAIL: gfortran.dg/integer_exponentiation_4.f90  -O   (test for errors, line 25)
FAIL: gfortran.dg/integer_exponentiation_4.f90  -O   (test for errors, line 26)
FAIL: gfortran.dg/integer_exponentiation_4.f90  -O   (test for errors, line 27)
FAIL: gfortran.dg/integer_exponentiation_4.f90  -O   (test for errors, line 35)
FAIL: gfortran.dg/integer_exponentiation_4.f90  -O   (test for errors, line 36)
FAIL: gfortran.dg/integer_exponentiation_4.f90  -O   (test for errors, line 37)
FAIL: gfortran.dg/integer_exponentiation_4.f90  -O   (test for errors, line 38)
FAIL: gfortran.dg/integer_exponentiation_4.f90  -O   (test for errors, line 41)
FAIL: gfortran.dg/integer_exponentiation_4.f90  -O   (test for errors, line 42)