Throw the actual exception when using a modifier, if one exists, so we can see the right stack trace

Author: jasonvarga

src/Modifiers/Modify.php

@@ -157,7 +157,7 @@ public function modify($modifier, $params = [])
         } catch (Exception $e) {
             // If a modifier's code raised an exception, we'll just
             // catch it here and rethrow it as a ModifierException.
-            $e = new ModifierException($e->getMessage());
+            $e = new ModifierException($e->getMessage(), 0, $e);
             $e->setModifier($modifier);
             throw $e;
         }

src/View/Antlers/Parser.php

@@ -1458,7 +1458,7 @@ protected function runModifier($modifier, $data, $parameters, $context = [])
         try {
             return Modify::value($value)->context($context)->$modifier($parameters)->fetch();
         } catch (ModifierException $e) {
-            throw_if(config('app.debug'), $e);
+            throw_if(config('app.debug'), ($prev = $e->getPrevious()) ? $prev : $e);
             Log::notice(sprintf('Error in [%s] modifier: %s', $e->getModifier(), $e->getMessage()));
 
             return $value;