Regressions on trunk at revision 218300 vs revision 218267

[H.J. Lu Intel64 Core i7]

New failures:
FAIL: 28_regex/algorithms/regex_match/ecma/wchar_t/63199.cc (test for excess errors)
FAIL: 28_regex/algorithms/regex_match/ecma/wchar_t/anymatcher.cc (test for excess errors)
FAIL: 28_regex/algorithms/regex_match/ecma/wchar_t/cjk_match.cc (test for excess errors)
FAIL: 28_regex/algorithms/regex_match/ecma/wchar_t/hex.cc (test for excess errors)
FAIL: 28_regex/algorithms/regex_match/extended/wstring_locale.cc (test for excess errors)
FAIL: 28_regex/algorithms/regex_replace/wchar_t/51711.cc (test for excess errors)
FAIL: 28_regex/basic_regex/assign/wchar_t/cstring.cc (test for excess errors)
FAIL: 28_regex/basic_regex/assign/wchar_t/cstring_op.cc (test for excess errors)
FAIL: 28_regex/basic_regex/assign/wchar_t/pstring.cc (test for excess errors)
FAIL: 28_regex/basic_regex/assign/wchar_t/range.cc (test for excess errors)
FAIL: 28_regex/basic_regex/assign/wchar_t/string.cc (test for excess errors)
FAIL: 28_regex/basic_regex/assign/wchar_t/string_op.cc (test for excess errors)
FAIL: 28_regex/basic_regex/ctors/basic/pstring_wchar_t.cc (test for excess errors)
FAIL: 28_regex/basic_regex/ctors/string_wchar_t.cc (test for excess errors)
FAIL: 28_regex/basic_regex/ctors/wchar_t/cstring.cc (test for excess errors)
FAIL: 28_regex/basic_regex/ctors/wchar_t/range.cc (test for excess errors)
FAIL: 28_regex/iterators/regex_iterator/wchar_t/string_01.cc (test for excess errors)
FAIL: 28_regex/iterators/regex_iterator/wchar_t/string_02.cc (test for excess errors)
FAIL: 28_regex/iterators/regex_token_iterator/wchar_t/string_01.cc (test for excess errors)
FAIL: 28_regex/iterators/regex_token_iterator/wchar_t/wstring_02.cc (test for excess errors)
FAIL: 28_regex/traits/wchar_t/user_defined.cc (test for excess errors)

New passes:
FAIL: gcc.target/i386/avx512ifma-vpmaddhuq-2.c (test for excess errors)
FAIL: gcc.target/i386/avx512ifma-vpmaddhuq-2.c (test for excess errors)
FAIL: gcc.target/i386/avx512ifma-vpmaddluq-2.c (test for excess errors)
FAIL: gcc.target/i386/avx512ifma-vpmaddluq-2.c (test for excess errors)
FAIL: gcc.target/i386/avx512vbmi-vpermb-2.c (test for excess errors)
FAIL: gcc.target/i386/avx512vbmi-vpermb-2.c (test for excess errors)
FAIL: gcc.target/i386/avx512vbmi-vpermi2b-2.c (test for excess errors)
FAIL: gcc.target/i386/avx512vbmi-vpermi2b-2.c (test for excess errors)
FAIL: gcc.target/i386/avx512vbmi-vpermt2b-2.c (test for excess errors)
FAIL: gcc.target/i386/avx512vbmi-vpermt2b-2.c (test for excess errors)
FAIL: gcc.target/i386/avx512vbmi-vpmultishiftqb-2.c (test for excess errors)
FAIL: gcc.target/i386/avx512vbmi-vpmultishiftqb-2.c (test for excess errors)