test_expect_success 'loop-upstream-pipe' '
(
	git rev-list --objects --no-object-names base..loose |
	while read oid
	do
# LINT: "|| echo" signals failure in loop upstream of a pipe
		path="$objdir/$(test_oid_to_path "$oid")" &&
		printf "%s %d\n" "$oid" "$(test-tool chmtime --get "$path")" ||
		echo "object list generation failed for $oid"
	done |
	sort -k1
) >expect &&
'