Show traces for non-fatal ErrorExceptions, close #562, #524

src/Whoops/Exception/Inspector.php

@@ -252,7 +252,7 @@ protected function getTrace($e)
         }
 
         if (!extension_loaded('xdebug') || !xdebug_is_enabled()) {
-            return [];
+            return $traces;
         }
 
         // Use xdebug to get the full stack trace and remove the shutdown handler stack trace