From 54488fb09d4ae9ef990269eefe4c16fe9ea58748 Mon Sep 17 00:00:00 2001
From: Duncan McClean <duncan@duncanmcclean.com>
Date: Wed, 2 Sep 2026 09:58:44 +0100
Subject: [PATCH] only treat paired slot tags as named slot definitions

`checkPartialForNamedSlots` picked up non-paired `{{ slot:title }}` output tags inside a nested partial pair, reducing them to empty strings and overwriting the real slot content.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TDjs3WSZv7K4p2bX6e1DZ9
---
 .../Language/Runtime/NodeProcessor.php        |  2 +-
 tests/Antlers/Runtime/PartialsTest.php        | 23 +++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/View/Antlers/Language/Runtime/NodeProcessor.php b/src/View/Antlers/Language/Runtime/NodeProcessor.php
index 1d7bf42b81a..a20730d1080 100644
--- a/src/View/Antlers/Language/Runtime/NodeProcessor.php
+++ b/src/View/Antlers/Language/Runtime/NodeProcessor.php
@@ -1137,7 +1137,7 @@ protected function checkPartialForNamedSlots(AntlersNode $node)
         $namedSlots = [];
 
         foreach ($node->children as $child) {
-            if ($child instanceof AntlersNode && ! $child->isComment && $child->name->name == 'slot') {
+            if ($child instanceof AntlersNode && ! $child->isComment && $child->isPaired() && $child->name->name == 'slot') {
                 $namedSlots[$child->name->methodPart] = $child;
             }
         }
diff --git a/tests/Antlers/Runtime/PartialsTest.php b/tests/Antlers/Runtime/PartialsTest.php
index 223a3f2c555..bb0172bd71b 100644
--- a/tests/Antlers/Runtime/PartialsTest.php
+++ b/tests/Antlers/Runtime/PartialsTest.php
@@ -95,4 +95,27 @@ public function test_assignments_in_earlier_partials_do_not_blank_a_later_partia
 
         $this->assertSame('FILTERhi<slot>KEEPME</slot>', $this->renderString($template, [], true));
     }
+
+    public function test_named_slots_render_inside_a_nested_partial_that_uses_the_default_slot()
+    {
+        $template = <<<'EOT'
+{{ partial:accordion index="1" }}
+    {{ slot:title }}<h2>The Title</h2>{{ /slot:title }}
+    {{ slot:icon }}<button>+</button>{{ /slot:icon }}
+    {{ slot:body }}<p>The Body</p>{{ /slot:body }}
+{{ /partial:accordion }}
+EOT;
+
+        $accordion = <<<'EOT'
+<div id="accordion-{{ index }}">{{ partial:flex_column class="p-6" }}<div class="header">{{ slot:title }}{{ slot:icon }}</div><div class="content">{{ slot:body }}</div>{{ /partial:flex_column }}</div>
+EOT;
+
+        $this->withFakeViews();
+        $this->viewShouldReturnRaw('accordion', $accordion);
+        $this->viewShouldReturnRaw('flex_column', '<div class="flex flex-col {{ class }}">{{ slot }}</div>');
+
+        $expected = '<div id="accordion-1"><div class="flex flex-col p-6"><div class="header"><h2>The Title</h2><button>+</button></div><div class="content"><p>The Body</p></div></div></div>';
+
+        $this->assertSame($expected, $this->renderString($template, [], true));
+    }
 }