Merge branch 'jk/fail-null-clone' into maint

* jk/fail-null-clone:
  clone: die when trying to clone missing local path

builtin/clone.c

@@ -413,7 +413,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	if (path)
 		repo = xstrdup(make_nonrelative_path(repo_name));
 	else if (!strchr(repo_name, ':'))
-		repo = xstrdup(make_absolute_path(repo_name));
+		die("repository '%s' does not exist", repo_name);
 	else
 		repo = repo_name;
 	is_local = path && !is_bundle;

t/t5701-clone-local.sh

@@ -144,4 +144,17 @@ test_expect_success 'clone empty repository, and then push should not segfault.'
 	test_must_fail git push)
 '
 
+test_expect_success 'cloning non-existent directory fails' '
+	cd "$D" &&
+	rm -rf does-not-exist &&
+	test_must_fail git clone does-not-exist
+'
+
+test_expect_success 'cloning non-git directory fails' '
+	cd "$D" &&
+	rm -rf not-a-git-repo not-a-git-repo-clone &&
+	mkdir not-a-git-repo &&
+	test_must_fail git clone not-a-git-repo not-a-git-repo-clone
+'
+
 test_done