prevent generic status 406 and 500 responses when encountering throwable. instanceof exception condition was retained for PHP <7.

Author: bartbrinkman

src/Listener/ApiProblemListener.php

@@ -96,7 +96,7 @@ public function onRender(MvcEvent $e)
         $status = $e->getResponse()->getStatusCode();
         $exception = $model->getVariable('exception');
 
-        if ($exception instanceof \Exception) {
+        if ($exception instanceof \Exception || $exception instanceof \Throwable) {
             $apiProblem = new ApiProblem($status, $exception);
         } else {
             $apiProblem = new ApiProblem($status, $model->getVariable('message'));
@@ -156,7 +156,7 @@ public function onDispatchError(MvcEvent $e)
 
         // Marshall an ApiProblem and view model based on the exception
         $exception = $e->getParam('exception');
-        if (! $exception instanceof \Exception) {
+        if (! ($exception instanceof \Exception || $exception instanceof \Throwable)) {
             // If it's not an exception, do not know what to do.
             return;
         }

src/Listener/RenderErrorListener.php

@@ -65,7 +65,11 @@ public function onRenderError(MvcEvent $e)
         $details = false;
 
         $exception = $e->getParam('exception');
-        if ($exception instanceof \Exception
+        if (
+            (
+                $exception instanceof \Exception
+                || $exception instanceof \Throwable
+            )
             && ! $exception instanceof ViewExceptionInterface
         ) {
             $code = $exception->getCode();