[PATCH 1/2] t9300: Add a test covering 'sub/testname' to 'sub/testname/testfile' renaming

@@ -1039,6 +1039,37 @@ test_expect_success \
 	 git diff-tree -M -r M3^ M3 >actual &&
 	 compare_diff_raw expect actual'
 
+cat >input <<INPUT_END
+blob
+mark :1
+data 10
+test file
+
+reset refs/heads/M4
+commit refs/heads/M4
+mark :2
+committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+data 8
+initial
+M 100644 :1 testname
+
+commit refs/heads/M5
+mark :3
+committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
+data 8
+initial
+from refs/heads/M4
+M 100644 :1 testname/testfile
+D testname
+
+INPUT_END
+
+test_expect_success \
+	'M: rename file into new subdirectory with same name' \
+	'git fast-import <input &&
+	 git checkout M5 &&
+	 test -d testname && test -f testname/testfile'
+
 ###
 ### series N
 ###

@@ -1595,6 +1595,15 @@ static int tree_content_remove(
 				 * exist and need not be deleted.
 				 */
 				return 1;
+			if (!slash1 && S_ISREG(e->versions[0].mode) && S_ISDIR(e->versions[1].mode))
+			    /*
+			     * If p names a file in some subdirectory and in
+			     * some commit that file got deleted, a directory
+			     * with the same name was set up in the same directory,
+			     * then there is no need to step into for further
+			     * iteration or deletion.
+			     */
+				return 0;
 			if (!slash1 || !S_ISDIR(e->versions[1].mode))
 				goto del_entry;
 			if (!e->tree)