submodule.c: report the submodule that an error occurs in

diff --git a/t/lib-submodule-update.sh b/t/lib-submodule-update.sh
index d7699046f6545be28d5c39c058d4ca9db9e93793..4ee54325bcdc5813aafcc2a9c823285e2c6fe8ae 100755 (executable)
--- a/t/lib-submodule-update.sh
+++ b/t/lib-submodule-update.sh
@@ -781,7 +781,8 @@ test_submodule_recursing_with_args_common() {
                (
                        cd submodule_update &&
                        git branch -t invalid_sub1 origin/invalid_sub1 &&
-                       test_must_fail $command invalid_sub1 &&
+                       test_must_fail $command invalid_sub1 2>err &&
+                       test_i18ngrep sub1 err &&
                        test_superproject_content origin/add_sub1 &&
                        test_submodule_content sub1 origin/add_sub1
                )
@@ -885,6 +886,7 @@ test_submodule_switch_recursing_with_args () {
                (
                        cd submodule_update &&
                        git branch -t replace_sub1_with_file origin/replace_sub1_with_file &&
+                       echo ignored >.git/modules/sub1/info/exclude &&
                        : >sub1/ignored &&
                        $command replace_sub1_with_file &&
                        test_superproject_content origin/replace_sub1_with_file &&
@@ -1014,4 +1016,18 @@ test_submodule_forced_switch_recursing_with_args () {
                        test_submodule_content sub1 origin/modify_sub1
                )
        '
+
+       test_expect_success "$command: changed submodule worktree is reset" '
+               prolog &&
+               reset_work_tree_to_interested add_sub1 &&
+               (
+                       cd submodule_update &&
+                       rm sub1/file1 &&
+                       : >sub1/new_file &&
+                       git -C sub1 add new_file &&
+                       $command HEAD &&
+                       test_path_is_file sub1/file1 &&
+                       test_path_is_missing sub1/new_file
+               )
+       '
 }