Regressions on master at commit r12-7608 vs commit r12-7601 on Linux/x86_64

[H.J. Lu]

New failures:
FAIL: g++.dg/other/pr84964.C  -std=c++14  (test for warnings, line 6)
FAIL: g++.dg/other/pr84964.C  -std=c++14  (test for warnings, line 6)
FAIL: g++.dg/other/pr84964.C  -std=c++17  (test for warnings, line 6)
FAIL: g++.dg/other/pr84964.C  -std=c++17  (test for warnings, line 6)
FAIL: g++.dg/other/pr84964.C  -std=c++20  (test for warnings, line 6)
FAIL: g++.dg/other/pr84964.C  -std=c++20  (test for warnings, line 6)
FAIL: g++.dg/other/pr84964.C  -std=c++98  (test for warnings, line 6)
FAIL: g++.dg/other/pr84964.C  -std=c++98  (test for warnings, line 6)

New passes: