[Test Breakage 2.46.0-rc0] Test t4135.06 fails on NonStop

Here is the breakage. This looks like a non-portable dependency on /dev/zero was introduced.

expecting success of 4153.6 '--reject overrides --no-reject':
        rm -fr .git/rebase-apply &&
        git reset --hard &&
        git checkout first &&
        rm -f file.rej &&

        test_must_fail git am --no-reject side1.eml &&
        test_path_is_dir .git/rebase-apply &&
        test_path_is_missing file.rej &&

        test_must_fail git am --retry --reject </dev/zero &&
        test_path_is_dir .git/rebase-apply &&
        test_path_is_file file.rej

+ rm -fr .git/rebase-apply
+ git reset --hard
HEAD is now at 4f3810f side2
+ git checkout first
Warning: you are leaving 2 commits behind, not connected to
any of your branches:

  4f3810f side2
  deca85c side1

If you want to keep them by creating a new branch, this may be a good time to do so with:

 git branch <new-branch-name> 4f3810f

HEAD is now at 3aaf771 first
+ rm -f file.rej
+ test_must_fail git am --no-reject side1.eml
Applying: side1
error: patch failed: file:1
error: file: patch does not apply
Patch failed at 0001 side1
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am
--abort".
hint: Disable this message with "git config advice.mergeConflict false"
+ test_path_is_dir .git/rebase-apply
+ test_path_is_missing file.rej
+ test_must_fail git am --retry --reject
+ test_eval_inner_[6]: /dev/zero: cannot open
error: last command exited with $?=1
not ok 6 - --reject overrides --no-reject
#
#               rm -fr .git/rebase-apply &&
#               git reset --hard &&
#               git checkout first &&
#               rm -f file.rej &&
#
#               test_must_fail git am --no-reject side1.eml &&
#               test_path_is_dir .git/rebase-apply &&
#               test_path_is_missing file.rej &&
#
#               test_must_fail git am --retry --reject </dev/zero &&
#               test_path_is_dir .git/rebase-apply &&
#               test_path_is_file file.rej
#
1..6

-- Brief whoami: NonStop&UNIX developer since approximately UNIX(421664400) NonStop(211288444200000000) -- In real life, I talk too much.