Regressions on master at commit r17-325 vs commit r17-322 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r17-325 vs commit r17-322 on Linux/x86_64
New failures:

New passes:
FAIL: 27_io/basic_stringbuf/sputn/wchar_t/9404-2.cc  -std=gnu++20 (test for 
excess errors)