Issue 337 - Race condition preventing initialization on first run

lib/filesystem/io.js

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2014 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 168 matching lines @@
       var Utils = require("utils").Utils;
       Utils.runAsync(callback.bind(null, null, {
         exists: true,
         isDirectory: false,
         isFile: true,
         lastModified: 0
       }));
       return;
     }
 
-    this._getFileEntry(file, false, function(fs, fileEntry)
-    {
-      fileEntry.getMetadata(function(metadata)
+    // This needs to use Utils.runAsync(), otherwise FilterStorage might
+    // initialize too early - see #337.
+    require("utils").Utils.runAsync(function() {
+      this._getFileEntry(file, false, function(fs, fileEntry)
       {
-        callback(null, {
-          exists: true,
-          isDirectory: fileEntry.isDirectory,
-          isFile: fileEntry.isFile,
-          lastModified: metadata.modificationTime.getTime()
-        });
+        fileEntry.getMetadata(function(metadata)
+        {
+          callback(null, {
+            exists: true,
+            isDirectory: fileEntry.isDirectory,
+            isFile: fileEntry.isFile,
+            lastModified: metadata.modificationTime.getTime()
+          });
+        }, callback);
       }, callback);
-    }, callback);
+    }.bind(this));
   }
 };