From eceda0ffc79f8506ab0aa9363721e518886c501e Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Sun, 21 Oct 2012 19:16:11 +0200
Subject: [PATCH] Fix regression introduced in
 beb9a5bd727d49bf539db676f1aa946901090257

---
 src/Composer/DependencyResolver/Pool.php | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/Composer/DependencyResolver/Pool.php b/src/Composer/DependencyResolver/Pool.php
index 2216d5215..28cdcfaaf 100644
--- a/src/Composer/DependencyResolver/Pool.php
+++ b/src/Composer/DependencyResolver/Pool.php
@@ -387,6 +387,23 @@ class Pool
             $replaces = $candidate->getReplaces();
         }
 
+        // aliases create multiple replaces/provides for one target so they can not use the shortcut
+        if (isset($replaces[0]) || isset($provides[0])) {
+            foreach ($provides as $link) {
+                if ($link->getTarget() === $name && $constraint->matches($link->getConstraint())) {
+                    return self::MATCH_PROVIDE;
+                }
+            }
+
+            foreach ($replaces as $link) {
+                if ($link->getTarget() === $name && $constraint->matches($link->getConstraint())) {
+                    return self::MATCH_REPLACE;
+                }
+            }
+
+            return self::MATCH_NONE;
+        }
+
         if (isset($provides[$name]) && $constraint->matches($provides[$name]->getConstraint())) {
             return self::MATCH_PROVIDE;
         }