t/3512: demonstrate unrelated submodule/file conflict as cherry-pick failure

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3512-cherry-pick-submodule.sh

@@ -10,4 +10,40 @@ KNOWN_FAILURE_NOFF_MERGE_DOESNT_CREATE_EMPTY_SUBMODULE_DIR=1
 KNOWN_FAILURE_NOFF_MERGE_ATTEMPTS_TO_MERGE_REMOVED_SUBMODULE_FILES=1
 test_submodule_switch "git cherry-pick"
 
+test_expect_failure 'unrelated submodule/file conflict is ignored' '
+	test_create_repo sub &&
+
+	touch sub/file &&
+	git -C sub add file &&
+	git -C sub commit -m "add a file in a submodule" &&
+
+	test_create_repo a_repo &&
+	(
+		cd a_repo &&
+		>a_file &&
+		git add a_file &&
+		git commit -m "add a file" &&
+
+		git branch test &&
+		git checkout test &&
+
+		mkdir sub &&
+		>sub/content &&
+		git add sub/content &&
+		git commit -m "add a regular folder with name sub" &&
+
+		echo "123" >a_file &&
+		git add a_file &&
+		git commit -m "modify a file" &&
+
+		git checkout master &&
+
+		git submodule add ../sub sub &&
+		git submodule update sub &&
+		git commit -m "add a submodule info folder with name sub" &&
+
+		git cherry-pick test
+	)
+'
+
 test_done