Regressions on trunk at revision 157187 vs revision 157163

[H.J. Lu Intel64]

New failures:
FAIL: gcc.dg/pr36997.c  (test for warnings, line 7)
FAIL: gcc.dg/pr36997.c  (test for warnings, line 7)
FAIL: gcc.dg/pr36997.c (test for excess errors)
FAIL: gcc.dg/pr36997.c (test for excess errors)

New passes:
FAIL: 30_threads/promise/members/set_value3.cc execution test
FAIL: 30_threads/promise/members/set_value3.cc execution test
WARNING: program timed out.
WARNING: program timed out.