Regressions on trunk at revision 268064 vs revision 268009

[H.J. Lu (x32)]

New failures:
FAIL: gcc.dg/utf-array.c  (test for errors, line 15)
FAIL: gcc.dg/utf-array.c  (test for errors, line 21)
FAIL: gcc.dg/utf-array.c  (test for errors, line 33)
FAIL: gcc.dg/utf-array.c (test for excess errors)

New passes:
FAIL: 21_strings/basic_string_view/operators/wchar_t/2.cc execution test
FAIL: 27_io/filesystem/path/concat/strings.cc execution test
FAIL: experimental/string_view/operators/wchar_t/2.cc execution test