index-pack: work around thread-unsafe pread()

diff --git a/t/t4010-diff-pathspec.sh b/t/t4010-diff-pathspec.sh
index 589bc6bfb4543324dcf6f166c4db482958f26e63..9f5659f7fe4df23d805e6c38264a1ebf38fc2538 100755 (executable)
--- a/t/t4010-diff-pathspec.sh
+++ b/t/t4010-diff-pathspec.sh
@@ -110,6 +110,23 @@ test_expect_success 'diff-tree -r with wildcard' '
        test_cmp expected result
 '
 
+test_expect_success 'setup submodules' '
+       test_tick &&
+       git init submod &&
+       ( cd submod && test_commit first; ) &&
+       git add submod &&
+       git commit -m first &&
+       ( cd submod && test_commit second; ) &&
+       git add submod &&
+       git commit -m second
+'
+
+test_expect_success 'diff-tree ignores trailing slash on submodule path' '
+       git diff --name-only HEAD^ HEAD submod >expect &&
+       git diff --name-only HEAD^ HEAD submod/ >actual &&
+       test_cmp expect actual
+'
+
 test_expect_success 'diff multiple wildcard pathspecs' '
        mkdir path2 &&
        echo rezrov >path2/file1 &&