From a7ad186c89a597239536586b6fd09ac5df154869 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Thu, 9 Apr 2020 17:12:35 +0200
Subject: [PATCH] Return early in case a call to the wrapped repo is
 unnecessary

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

diff --git a/src/Composer/Repository/FilterRepository.php b/src/Composer/Repository/FilterRepository.php
index 92c8283a8..78be0e225 100644
--- a/src/Composer/Repository/FilterRepository.php
+++ b/src/Composer/Repository/FilterRepository.php
@@ -116,6 +116,10 @@ class FilterRepository implements RepositoryInterface
             }
         }
 
+        if (!$packageMap) {
+            return array('namesFound' => array(), 'packages' => array());
+        }
+
         $result = $this->repo->loadPackages($packageMap, $acceptableStabilities, $stabilityFlags);
         if (!$this->canonical) {
             $result['namesFound'] = array();