Add another test

src/ExpressionParser.php

@@ -469,9 +469,8 @@ class ExpressionParser
                 $recurseArgs = new ArrayExpression([new ConstantExpression(0, $line), $args->getNode('0')], $line);
                 $expr = new GetAttrExpression(new NameExpression('loop', $line), new ConstantExpression('__invoke', $line), $recurseArgs, Template::METHOD_CALL, $line);
                 $expr->setAttribute('is_generator', true);
-                $expr = new FilterExpression($expr, new ConstantExpression('raw', $line), new Node(), $line);
 
-                return $expr;
+                return new FilterExpression($expr, new ConstantExpression('raw', $line), new Node(), $line);
             default:
                 if (null !== $alias = $this->parser->getImportedSymbol('function', $name)) {
                     $arguments = new ArrayExpression([], $line);

tests/Node/ForTest.php

@@ -11,6 +11,8 @@ namespace Twig\Tests\Node;
  * file that was distributed with this source code.
  */
 
+use Twig\Environment;
+use Twig\Loader\ArrayLoader;
 use Twig\Node\Expression\AssignNameExpression;
 use Twig\Node\Expression\NameExpression;
 use Twig\Node\ForNode;
@@ -156,6 +158,29 @@ yield from \$__internal_compile_1(\$__internal_compile_0, \$context, \$blocks, \
 EOF
         ];
 
+        // recursive loop
+        $env = new Environment(new ArrayLoader(['index' => '{% for item in items %}{{ loop(item.children) }}{% endfor %}']));
+        $node = $env->parse($env->tokenize($env->getLoader()->getSourceContext('index')))->getNode('body');
+
+        $tests[] = [$node, <<<EOF
+// line 1
+\$__internal_compile_0 = new \Twig\Runtime\LoopIterator({$this->getVariableGetter('items')});
+\$__internal_compile_1 = function (\$__internal_compile_0, &\$context, \$blocks, &\$__internal_compile_1, \$depth) {
+    \$macros = \$this->macros;
+    \$__internal_compile_2 = \$context;
+    \$context['loop'] = new \Twig\Runtime\LoopContext(\$__internal_compile_0, \$__internal_compile_2, \$blocks, \$__internal_compile_1, \$depth);
+    foreach (\$__internal_compile_0 as \$context["_key"] => \$context["item"]) {
+        yield from CoreExtension::getAttribute(\$this->env, \$this->source, \$context["loop"], "__invoke", arguments: [CoreExtension::getAttribute(\$this->env, \$this->source, \$context["item"], "children", arguments: [], lineno: 1)], type: "method", lineno: 1);
+    }
+    unset(\$context['_key'], \$context['item'], \$context['loop']);
+    \$context = array_intersect_key(\$context, \$__internal_compile_2) + \$__internal_compile_2;
+    return; yield;
+};
+\Closure::bind(\$__internal_compile_1, \$this, self::class);
+yield from \$__internal_compile_1(\$__internal_compile_0, \$context, \$blocks, \$__internal_compile_1, 0);
+EOF
+        , $env];
+
         return $tests;
     }
 }