Throw an exception in ScopedCallback for invalid callbacks.

Change-Id: I303dec64e55df0b1de73c6db6577bfb005cbe464

diff --git a/includes/ScopedCallback.php b/includes/ScopedCallback.php
index fa88c0e..ef22e0a 100644 (file)
--- a/includes/ScopedCallback.php
+++ b/includes/ScopedCallback.php
@@ -31,8 +31,12 @@ class ScopedCallback {
 
        /**
         * @param callable $callback
+        * @throws MWException
         */
        public function __construct( $callback ) {
+               if ( !is_callable( $callback ) ) {
+                       throw new MWException( "Provided callback is not valid." );
+               }
                $this->callback = $callback;
        }