[zendframework/zendframework#2210] Pass ErrorHandler::stop() result as previous exception

- Per @mark-mabe
- Any place where an exception is throw immediately following an
  ErrorHandler::stop() call should pass the result of that call as the previous
  exception.

Author: weierophinney

src/Adapter/Digest.php

@@ -172,9 +172,9 @@ public function authenticate()
 
         ErrorHandler::start(E_WARNING);
         $fileHandle = fopen($this->filename, 'r');
-        ErrorHandler::stop();
+        $error      = ErrorHandler::stop();
         if (false === $fileHandle) {
-            throw new Exception\UnexpectedValueException("Cannot open '$this->filename' for reading");
+            throw new Exception\UnexpectedValueException("Cannot open '$this->filename' for reading", 0, $error);
         }
 
         $id       = "$this->username:$this->realm";

src/Adapter/Http/FileResolver.php

@@ -105,10 +105,10 @@ public function resolve($username, $realm, $password = null)
 
         // Open file, read through looking for matching credentials
         ErrorHandler::start(E_WARNING);
-        $fp = fopen($this->file, 'r');
-        ErrorHandler::stop();
+        $fp     = fopen($this->file, 'r');
+        $error = ErrorHandler::stop();
         if (!$fp) {
-            throw new Exception\RuntimeException('Unable to open password file: ' . $this->file);
+            throw new Exception\RuntimeException('Unable to open password file: ' . $this->file, 0, $error);
         }
 
         // No real validation is done on the contents of the password file. The