From f4c5152f454d86438cb53af7fbcb15061df165b9 Mon Sep 17 00:00:00 2001
From: Fabien Potencier <fabien.potencier@gmail.com>
Date: Fri, 2 Mar 2018 10:56:39 -0800
Subject: [PATCH] optimized calls to custom extension runtimes

---
 lib/Twig/Node/Expression/Call.php | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/Twig/Node/Expression/Call.php b/lib/Twig/Node/Expression/Call.php
index 727646fe6..3ba45e377 100644
--- a/lib/Twig/Node/Expression/Call.php
+++ b/lib/Twig/Node/Expression/Call.php
@@ -28,7 +28,13 @@ abstract class Twig_Node_Expression_Call extends Twig_Node_Expression
                     $compiler->raw(sprintf('$this->env->getRuntime(\'%s\')->%s', $callable[0], $callable[1]));
                 }
             } elseif ($r instanceof ReflectionMethod && $callable[0] instanceof Twig_ExtensionInterface) {
-                $compiler->raw(sprintf('$this->env->getExtension(\'%s\')->%s', get_class($callable[0]), $callable[1]));
+                // For BC/FC with namespaced aliases
+                $class = (new ReflectionClass(get_class($callable[0])))->name;
+                if (!$compiler->getEnvironment()->hasExtension($class)) {
+                    throw new Twig_Error_Runtime(sprintf('The "%s" extension is not enabled.', $class));
+                }
+        
+                $compiler->raw(sprintf('$this->extensions[\'%s\']->%s', ltrim($class, '\\'), $callable[1]));
             } else {
                 $closingParenthesis = true;
                 $compiler->raw(sprintf('call_user_func_array($this->env->get%s(\'%s\')->getCallable(), array', ucfirst($this->getAttribute('type')), $this->getAttribute('name')));