Regressions on master at commit r16-6962 vs commit r16-6959 on Linux/x86_64

[Haochen Jiang]

Regressions on master at commit r16-6962 vs commit r16-6959 on Linux/x86_64
New failures:

New passes:
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C  -std=c++20 (test for excess errors)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C  -std=c++20 (test for excess errors)