[Bug testsuite/92829] [10 regression] several test case failures starting with r278983

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92829

--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Only the gcc.dg/Warray-bounds-56.c failure.  I still see the failures below in
a recent test result
(https://gcc.gnu.org/ml/gcc-testresults/2020-01/msg00764.html):

FAIL: gcc.dg/Wstringop-overflow-25.c  (test for warnings, line 317)
FAIL: gcc.dg/Wstringop-overflow-25.c  (test for warnings, line 318)
FAIL: gcc.dg/Wstringop-overflow-25.c  (test for warnings, line 319)

FAIL: g++.dg/warn/Wstringop-overflow-4.C  -std=gnu++14  (test for warnings,
line 117)
FAIL: g++.dg/warn/Wstringop-overflow-4.C  -std=gnu++17  (test for warnings,
line 117)
FAIL: g++.dg/warn/Wstringop-overflow-4.C  -std=gnu++2a  (test for warnings,
line 117)
FAIL: g++.dg/warn/Wstringop-overflow-4.C  -std=gnu++98  (test for warnings,
line 117)