Regressions on trunk at revision 202825 vs revision 202823

[H.J. Lu Intel64]

New failures:
FAIL: 23_containers/list/requirements/exception/propagation_consistent.cc (test for excess errors)
FAIL: abi/demangle/abi_examples/23.cc (test for excess errors)

New passes:
FAIL: c-c++-common/asan/sanity-check-pure-c-1.c  -O0  (test for excess errors)