Also prevent throwing another exception in the case that the exception logger level is not set.

Also prevent throwing another exception in the case that the exception logger level is not set.

src/Monolog/ErrorHandler.php

@@ -72,7 +72,7 @@ class ErrorHandler
     public function registerExceptionHandler($level = null, $callPrevious = true)
     {
         $prev = set_exception_handler(array($this, 'handleException'));
-        $this->uncaughtExceptionLevel = $level === null ? LogLevel::ERROR : $level;
+        $this->uncaughtExceptionLevel = $level;
         if ($callPrevious && $prev) {
             $this->previousExceptionHandler = $prev;
         }
@@ -121,7 +121,11 @@ class ErrorHandler
      */
     public function handleException(\Exception $e)
     {
-        $this->logger->log($this->uncaughtExceptionLevel, 'Uncaught exception', array('exception' => $e));
+        $this->logger->log(
+            $this->uncaughtExceptionLevel === null ? LogLevel::ERROR : $this->uncaughtExceptionLevel,
+            'Uncaught exception',
+            array('exception' => $e)
+        );
 
         if ($this->previousExceptionHandler) {
             call_user_func($this->previousExceptionHandler, $e);