Regressions on master at commit r12-2898 vs commit r12-2891 on Linux/x86_64

[H.J. Lu]

New failures:
FAIL: g++.dg/warn/uninit-1.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/warn/uninit-1.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/warn/uninit-1.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/warn/uninit-1.C  -std=gnu++17 (test for excess errors)
FAIL: g++.dg/warn/uninit-1.C  -std=gnu++17 (test for excess errors)
FAIL: g++.dg/warn/uninit-1.C  -std=gnu++17 (test for excess errors)
FAIL: g++.dg/warn/uninit-1.C  -std=gnu++2a (test for excess errors)
FAIL: g++.dg/warn/uninit-1.C  -std=gnu++2a (test for excess errors)
FAIL: g++.dg/warn/uninit-1.C  -std=gnu++2a (test for excess errors)
FAIL: g++.dg/warn/uninit-1.C  -std=gnu++98 (test for excess errors)
FAIL: g++.dg/warn/uninit-1.C  -std=gnu++98 (test for excess errors)
FAIL: g++.dg/warn/uninit-1.C  -std=gnu++98 (test for excess errors)

New passes: