From c97b7a9be5701ea606ef3eecb01016903f9d25ac Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Mon, 14 Jan 2019 16:37:33 +0100
Subject: [PATCH] Fix implementation of filterPackages

---
 src/Composer/Repository/ComposerRepository.php | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/src/Composer/Repository/ComposerRepository.php b/src/Composer/Repository/ComposerRepository.php
index 829883b58..6e3994380 100644
--- a/src/Composer/Repository/ComposerRepository.php
+++ b/src/Composer/Repository/ComposerRepository.php
@@ -185,17 +185,25 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
 
     private function filterPackages(array $packages, $constraint = null, $returnFirstMatch = false)
     {
-        $packages = array();
+        if (null === $constraint) {
+            if ($returnFirstMatch) {
+                return reset($packages);
+            }
+
+            return $packages;
+        }
+
+        $filteredPackages = array();
 
         foreach ($packages as $package) {
-
             $pkgConstraint = new Constraint('==', $package->getVersion());
-            if (null === $constraint || $constraint->matches($pkgConstraint)) {
+
+            if ($constraint->matches($pkgConstraint)) {
                 if ($returnFirstMatch) {
                     return $package;
                 }
 
-                $packages[] = $package;
+                $filteredPackages[] = $package;
             }
         }
 
@@ -203,7 +211,7 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
             return null;
         }
 
-        return $packages;
+        return $filteredPackages;
     }
 
     public function getPackages()