Use facades.

app/Providers/ErrorServiceProvider.php

@@ -1,5 +1,7 @@
 <?php namespace App\Providers;
 
+use App, Log;
+use Exception;
 use Illuminate\Support\ServiceProvider;
 
 class ErrorServiceProvider extends ServiceProvider {
@@ -17,9 +19,9 @@ class ErrorServiceProvider extends ServiceProvider {
 		// exceptions. If nothing is returned, the default error view is
 		// shown, which includes a detailed stack trace during debug.
 
-		$this->app->error(function(\Exception $exception, $code)
+		App::error(function(Exception $exception, $code)
 		{
-			$this->app['log']->error($exception);
+			Log::error($exception);
 		});
 	}