[ExpressionLanguage] throws an exception on calling uncallable method

Author: fmata

src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php

@@ -77,8 +77,11 @@ public function evaluate($functions, $values)
                 if (!is_object($obj)) {
                     throw new \RuntimeException('Unable to get a property on a non-object.');
                 }
+                if (!is_callable($toCall = array($obj, $this->nodes['attribute']->attributes['value']))) {
+                    throw new \RuntimeException(sprintf('Unable to call method "%s" of object "%s".', $this->nodes['attribute']->attributes['value'], get_class($obj)));
+                }
 
-                return call_user_func_array(array($obj, $this->nodes['attribute']->attributes['value']), $this->nodes['arguments']->evaluate($functions, $values));
+                return call_user_func_array($toCall, $this->nodes['arguments']->evaluate($functions, $values));
 
             case self::ARRAY_CALL:
                 $array = $this->nodes['node']->evaluate($functions, $values);

src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php

@@ -163,6 +163,16 @@ public function testRegisterAfterEval($registerCallback)
         $registerCallback($el);
     }
 
+    /**
+     * @expectedException \RuntimeException
+     * @expectedExceptionMessageRegExp  /Unable to call method "\w+" of object "\w+"./
+     */
+    public function testCallBadCallable()
+    {
+        $el = new ExpressionLanguage();
+        $el->evaluate('foo.myfunction()', array('foo' => new \stdClass()));
+    }
+
     /**
      * @dataProvider getRegisterCallbacks
      * @expectedException \LogicException