Regressions on trunk at revision 250376 vs revision 250367

[H.J. Lu Intel64]

New failures:

New passes:
FAIL: 21_strings/basic_string/modifiers/insert/wchar_t/1.cc execution test
FAIL: g++.dg/ext/sync-4.C  -std=gnu++11 execution test
FAIL: g++.dg/ext/sync-4.C  -std=gnu++11 execution test
FAIL: g++.dg/ext/sync-4.C  -std=gnu++14 execution test
FAIL: g++.dg/ext/sync-4.C  -std=gnu++14 execution test
FAIL: g++.dg/ext/sync-4.C  -std=gnu++98 execution test
FAIL: g++.dg/ext/sync-4.C  -std=gnu++98 execution test