Merge branch 'jk/fetch-pack-fsck-wo-lock-pack'

"git fetch-pack -k -k" without passing "--lock-pack" (which we
never do ourselves) did not work at all, which has been corrected.

* jk/fetch-pack-fsck-wo-lock-pack:
  fetch-pack: fix segfault when fscking without --lock-pack

fetch-pack.c

@@ -1038,8 +1038,10 @@ static int get_pack(struct fetch_pack_args *args,
 
 		if (!is_well_formed)
 			die(_("fetch-pack: invalid index-pack output"));
-		if (pack_lockfile)
+		if (pack_lockfiles && pack_lockfile)
 			string_list_append_nodup(pack_lockfiles, pack_lockfile);
+		else
+			free(pack_lockfile);
 		parse_gitmodules_oids(cmd.out, gitmodules_oids);
 		close(cmd.out);
 	}

t/t5500-fetch-pack.sh

@@ -993,6 +993,16 @@ test_expect_success 'ensure bogus fetch.negotiationAlgorithm yields error' '
 		       fetch origin server_has both_have_2
 '
 
+test_expect_success 'fetch-pack with fsckObjects and keep-file does not segfault' '
+	rm -rf server client &&
+	test_create_repo server &&
+	test_commit -C server one &&
+
+	test_create_repo client &&
+	git -c fetch.fsckObjects=true \
+	    -C client fetch-pack -k -k ../server HEAD
+'
+
 test_expect_success 'filtering by size' '
 	rm -rf server client &&
 	test_create_repo server &&