Remove legacy Twig_ namespace support

Author: GromNaN

CHANGELOG.md

@@ -6,6 +6,7 @@ CHANGELOG
 
  * Add argument `$label` to `VarDumper::dump()`
  * Require explicit argument when calling `VarDumper::setHandler()`
+ * Remove display of backtrace in `Twig_Template`, only `Twig\Template` are supported
 
 6.4
 ---

Caster/ExceptionCaster.php

@@ -214,7 +214,7 @@ public static function castFrameStub(FrameStub $frame, array $a, Stub $stub, boo
                 $ellipsis = $ellipsis->attr['ellipsis'] ?? 0;
 
                 if (is_file($f['file']) && 0 <= self::$srcContext) {
-                    if (!empty($f['class']) && (is_subclass_of($f['class'], 'Twig\Template') || is_subclass_of($f['class'], 'Twig_Template')) && method_exists($f['class'], 'getDebugInfo')) {
+                    if (!empty($f['class']) && is_subclass_of($f['class'], 'Twig\Template') && method_exists($f['class'], 'getDebugInfo')) {
                         $template = null;
                         if (isset($f['object'])) {
                             $template = $f['object'];