From 4dfa3c469e04e5db02e4840ea23a1aa6264f0f9c Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Sun, 20 Jul 2014 19:07:31 +0200
Subject: [PATCH] Fix class map generator handling of missing files

---
 src/Composer/Autoload/ClassMapGenerator.php | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Composer/Autoload/ClassMapGenerator.php b/src/Composer/Autoload/ClassMapGenerator.php
index 8f45adee8..0f289bcbd 100644
--- a/src/Composer/Autoload/ClassMapGenerator.php
+++ b/src/Composer/Autoload/ClassMapGenerator.php
@@ -116,6 +116,14 @@ class ClassMapGenerator
 
         try {
             $contents = @php_strip_whitespace($path);
+            if (!$contents) {
+                if (!file_exists($path)) {
+                    throw new \Exception('File does not exist');
+                }
+                if (!is_readable($path)) {
+                    throw new \Exception('File is not readable');
+                }
+            }
         } catch (\Exception $e) {
             throw new \RuntimeException('Could not scan for classes inside '.$path.": \n".$e->getMessage(), 0, $e);
         }