From 360966dcdfef76af0728e3222df7731712f1e096 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=A1vid=20Andor?= <david-andor@kozpontiagy.hu>
Date: Tue, 16 Feb 2021 21:58:41 +0100
Subject: [PATCH] EventDispatcher uses only the return value of the last one
 listener, refs #9703

---
 src/Composer/EventDispatcher/EventDispatcher.php | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/Composer/EventDispatcher/EventDispatcher.php b/src/Composer/EventDispatcher/EventDispatcher.php
index faedb969a..329b00f0a 100644
--- a/src/Composer/EventDispatcher/EventDispatcher.php
+++ b/src/Composer/EventDispatcher/EventDispatcher.php
@@ -156,8 +156,9 @@ class EventDispatcher
 
         $this->pushEvent($event);
 
-        $return = 0;
+        $returnMax = 0;
         foreach ($listeners as $callable) {
+            $return = 0;
             $this->ensureBinDirIsInPath();
 
             if (!is_string($callable)) {
@@ -273,6 +274,8 @@ class EventDispatcher
                 }
             }
 
+            $returnMax = max($returnMax, $return);
+
             if ($event->isPropagationStopped()) {
                 break;
             }
@@ -280,7 +283,7 @@ class EventDispatcher
 
         $this->popEvent();
 
-        return $return;
+        return $returnMax;
     }
 
     protected function executeTty($exec)