From 97d09a9b77e1f5059f5d6ab284ed268a33ce3b1b Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Tue, 8 Aug 2017 15:56:08 +0200
Subject: [PATCH] Make github driver code more robust

---
 src/Composer/Repository/Vcs/GitHubDriver.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Composer/Repository/Vcs/GitHubDriver.php b/src/Composer/Repository/Vcs/GitHubDriver.php
index d1d6705f1..916150fa3 100644
--- a/src/Composer/Repository/Vcs/GitHubDriver.php
+++ b/src/Composer/Repository/Vcs/GitHubDriver.php
@@ -512,8 +512,8 @@ class GitHubDriver extends VcsDriver
     {
         $headers = $this->remoteFilesystem->getLastHeaders();
         foreach ($headers as $header) {
-            if (substr($header, 0, 5) === 'Link:') {
-                $links = explode(',', substr($header, 5));
+            if (preg_match('{^link:\s*(.+?)\s*$}i', $header, $match)) {
+                $links = explode(',', $match[1]);
                 foreach ($links as $link) {
                     if (preg_match('{<(.+?)>; *rel="next"}', $link, $match)) {
                         return $match[1];