From f1c1ba27b4456adbf9c3ab38be9c7c5f5e4f1282 Mon Sep 17 00:00:00 2001
From: Max Gfeller <mg@cyon.ch>
Date: Thu, 19 Dec 2013 07:58:58 +0100
Subject: [PATCH] Throw an exception if no listeners have been found for given
 event.

---
 src/Composer/EventDispatcher/EventDispatcher.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Composer/EventDispatcher/EventDispatcher.php b/src/Composer/EventDispatcher/EventDispatcher.php
index 9c2aee91f..2f19673c4 100644
--- a/src/Composer/EventDispatcher/EventDispatcher.php
+++ b/src/Composer/EventDispatcher/EventDispatcher.php
@@ -118,6 +118,10 @@ class EventDispatcher
     {
         $listeners = $this->getListeners($event);
 
+        if(sizeof($listeners) === 0) {
+            throw new \InvalidArgumentException(sprintf('Script "%s" does not exist', $event->getName()));
+        }
+
         foreach ($listeners as $callable) {
             if (!is_string($callable) && is_callable($callable)) {
                 call_user_func($callable, $event);