[r14-6470 Regression] FAIL: g++.dg/pr112822.C -std=gnu++98 (test for excess errors) on Linux/x86_64

[r14-6470 Regression] FAIL: g++.dg/pr112822.C -std=gnu++98 (test for excess errors) on Linux/x86_64

[haochen.jiang]

On Linux/x86_64,

788e0d48ec639d44294434f4f20ae94023c3759d is the first bad commit
commit 788e0d48ec639d44294434f4f20ae94023c3759d
Author: Peter Bergner <bergner@linux.ibm.com>
Date:   Tue Dec 12 16:46:16 2023 -0600

    testsuite: Add testcase for already fixed PR [PR112822]

caused

FAIL: g++.dg/pr112822.C  -std=gnu++14 (test for excess errors)
FAIL: g++.dg/pr112822.C  -std=gnu++98 (test for excess errors)

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-6470/usr --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl --enable-libmpx x86_64-linux --disable-bootstrap

To reproduce:

$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=g++.dg/pr112822.C --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=g++.dg/pr112822.C --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=g++.dg/pr112822.C --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=g++.dg/pr112822.C --target_board='unix{-m64\ -march=cascadelake}'"

(Please do not reply to this email, for question about this report, contact me at haochen dot jiang at intel.com.)
(If you met problems with cascadelake related, disabling AVX512F in command line might save that.)
(However, please make sure that there is no potential problems with AVX512.)