Regressions on trunk at revision 222440 vs revision 222421

[Intel Automatic Testing System [ia32 Core AVXi PIE]]

New failures:

New passes:
FAIL: g++.dg/ext/alias-canon2.C  -std=c++11 (test for excess errors)
FAIL: g++.dg/ext/alias-canon2.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/ext/alias-canon2.C  -std=c++98 (test for excess errors)