pkt-line: fix packet_read_line() to handle len < 0 errors

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 83492af05f2bfd8ca1ec796b7ae8dccc84f0f31b..fb2a090a0ce464cf6f663fa367c4859bd3a5f619 100644 (file)
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -1128,25 +1128,22 @@ static const char *update(struct command *cmd, struct shallow_info *si)
 static void run_update_post_hook(struct command *commands)
 {
        struct command *cmd;
-       int argc;
        struct child_process proc = CHILD_PROCESS_INIT;
        const char *hook;
 
        hook = find_hook("post-update");
-       for (argc = 0, cmd = commands; cmd; cmd = cmd->next) {
-               if (cmd->error_string || cmd->did_not_exist)
-                       continue;
-               argc++;
-       }
-       if (!argc || !hook)
+       if (!hook)
                return;
 
-       argv_array_push(&proc.args, hook);
        for (cmd = commands; cmd; cmd = cmd->next) {
                if (cmd->error_string || cmd->did_not_exist)
                        continue;
+               if (!proc.args.argc)
+                       argv_array_push(&proc.args, hook);
                argv_array_push(&proc.args, cmd->ref_name);
        }
+       if (!proc.args.argc)
+               return;
 
        proc.no_stdin = 1;
        proc.stdout_to_stderr = 1;