Regressions on trunk at revision 249971 vs revision 249935

[H.J. Lu Intel64 Core i7]

New failures:
FAIL: 21_strings/basic_string/modifiers/insert/char/1.cc execution test
FAIL: 21_strings/basic_string/modifiers/insert/wchar_t/1.cc execution test

New passes:
FAIL: gcc.target/i386/pr69255-2.c  (test for errors, line 15)
FAIL: gcc.target/i386/pr69255-2.c  (test for errors, line 15)
FAIL: gcc.target/i386/pr69255-2.c  (test for warnings, line 15)
FAIL: gcc.target/i386/pr69255-2.c  (test for warnings, line 15)
FAIL: gcc.target/i386/pr69255-2.c  (test for warnings, line 15)
FAIL: gcc.target/i386/pr69255-2.c  (test for warnings, line 15)