Regressions on trunk at revision 267619 vs revision 267607

[H.J. Lu (ia32 Core i7)]

New failures:
FAIL: libstdc++-prettyprinters/cxx17.cc print v2
FAIL: libstdc++-prettyprinters/cxx17.cc print v2

New passes:
FAIL: c-c++-common/attributes-4.c  -std=gnu++14 (test for excess errors)
FAIL: c-c++-common/attributes-4.c  -std=gnu++17 (test for excess errors)
FAIL: c-c++-common/attributes-4.c  -std=gnu++98 (test for excess errors)
FAIL: c-c++-common/attributes-4.c  -Wc++-compat  (test for excess errors)