Regressions on master at commit r13-2452 vs commit r13-2398 on Linux/i686

[H.J. Lu]

New failures:
FAIL: 30_threads/async/49668.cc (test for excess errors)
FAIL: backward/hash_set/check_construct_destroy.cc (test for excess errors)
FAIL: ext/concurrence_lock_error/cons_virtual_derivation.cc (test for excess errors)
FAIL: gfortran.dg/gomp/doacross-5.f90   -O   (test for errors, line 28)
FAIL: gfortran.dg/gomp/doacross-5.f90   -O   (test for errors, line 42)
FAIL: gfortran.dg/gomp/doacross-5.f90   -O   (test for errors, line 48)
FAIL: gfortran.dg/gomp/doacross-5.f90   -O   (test for errors, line 55)
FAIL: gfortran.dg/gomp/doacross-5.f90   -O   (test for errors, line 70)
FAIL: gfortran.dg/gomp/doacross-5.f90   -O   (test for errors, line 82)
FAIL: gfortran.dg/gomp/doacross-5.f90   -O  (test for excess errors)
FAIL: tr1/6_containers/hash/operators/size_t.cc (test for excess errors)

New passes: