http-fetch: clear leaking git-index-pack(1) arguments

We never clear the arguments that we pass to git-index-pack(1). Create a
common exit path and release them there to plug this leak.

This is leak is exposed by t5702, but plugging the leak does not make
the whole test suite pass.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Jeff King <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

http-fetch.c

@@ -106,6 +106,7 @@ int cmd_main(int argc, const char **argv)
 	int nongit;
 	struct object_id packfile_hash;
 	struct strvec index_pack_args = STRVEC_INIT;
+	int ret;
 
 	setup_git_directory_gently(&nongit);
 
@@ -157,8 +158,8 @@ int cmd_main(int argc, const char **argv)
 
 		fetch_single_packfile(&packfile_hash, argv[arg],
 				      index_pack_args.v);
-
-		return 0;
+		ret = 0;
+		goto out;
 	}
 
 	if (index_pack_args.nr)
@@ -170,7 +171,12 @@ int cmd_main(int argc, const char **argv)
 		commit_id = (char **) &argv[arg++];
 		commits = 1;
 	}
-	return fetch_using_walker(argv[arg], get_verbosely, get_recover,
-				  commits, commit_id, write_ref,
-				  commits_on_stdin);
+
+	ret = fetch_using_walker(argv[arg], get_verbosely, get_recover,
+				 commits, commit_id, write_ref,
+				 commits_on_stdin);
+
+out:
+	strvec_clear(&index_pack_args);
+	return ret;
 }