Switched to non-null defaults in exception constructors

Author: derrabus

Exception/MethodNotAllowedException.php

@@ -22,7 +22,10 @@ class MethodNotAllowedException extends \RuntimeException implements ExceptionIn
 {
     protected $allowedMethods = [];
 
-    public function __construct(array $allowedMethods, string $message = null, int $code = 0, \Throwable $previous = null)
+    /**
+     * @param string[] $allowedMethods
+     */
+    public function __construct(array $allowedMethods, ?string $message = '', int $code = 0, \Throwable $previous = null)
     {
         $this->allowedMethods = array_map('strtoupper', $allowedMethods);
 
@@ -32,7 +35,7 @@ public function __construct(array $allowedMethods, string $message = null, int $
     /**
      * Gets the allowed HTTP methods.
      *
-     * @return array
+     * @return string[]
      */
     public function getAllowedMethods()
     {

RouteCollectionBuilder.php

@@ -362,11 +362,11 @@ private function load($resource, string $type = null): array
         }
 
         if (null === $resolver = $this->loader->getResolver()) {
-            throw new LoaderLoadException($resource, null, null, null, $type);
+            throw new LoaderLoadException($resource, null, 0, null, $type);
         }
 
         if (false === $loader = $resolver->resolve($resource, $type)) {
-            throw new LoaderLoadException($resource, null, null, null, $type);
+            throw new LoaderLoadException($resource, null, 0, null, $type);
         }
 
         $collections = $loader->load($resource, $type);