[r14-11203 Regression] FAIL: g++.dg/modules/pr114630_a.C -std=c++2b (test for excess errors) on Linux/x86_64

[haochen.jiang]

On Linux/x86_64,

7c013a681cc138b8f191b75e408fe322d7fd998c is the first bad commit
commit 7c013a681cc138b8f191b75e408fe322d7fd998c
Author: Nathaniel Shead <nathanieloshead@gmail.com>
Date:   Fri Jan 10 01:06:37 2025 +1100

    c++/modules: Handle chaining already-imported local types [PR114630]

caused

FAIL: g++.dg/modules/pr114630_a.C module-cmi X (gcm.cache/X.gcm)
FAIL: g++.dg/modules/pr114630_a.C -std=c++17 (test for excess errors)
FAIL: g++.dg/modules/pr114630_a.C -std=c++2a (test for excess errors)
FAIL: g++.dg/modules/pr114630_a.C -std=c++2b (test for excess errors)

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/gcc-14/releases/gcc-14/r14-11203/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="modules.exp=g++.dg/modules/pr114630_a.C --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="modules.exp=g++.dg/modules/pr114630_a.C --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="modules.exp=g++.dg/modules/pr114630_a.C --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="modules.exp=g++.dg/modules/pr114630_a.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.)