From 8768143d7e2901e03143a423bc4a127dc4e48f0a Mon Sep 17 00:00:00 2001
From: Tom Schuster <evilpies@gmail.com>
Date: Mon, 8 Jul 2024 21:19:08 +0200
Subject: [PATCH] avm2: Throw error for missing end tag in E4X

---
 core/src/avm2/e4x.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/core/src/avm2/e4x.rs b/core/src/avm2/e4x.rs
index 48eaad1bd..69e76bac7 100644
--- a/core/src/avm2/e4x.rs
+++ b/core/src/avm2/e4x.rs
@@ -979,6 +979,15 @@ impl<'gc> E4XNode<'gc> {
                 Event::Eof => break,
             }
         }
+
+        // Throw an error for unclosed tags.
+        if let Some(current_tag) = open_tags.last() {
+            return Err(make_error_1085(
+                activation,
+                &current_tag.local_name().unwrap().to_utf8_lossy(),
+            ));
+        }
+
         Ok(top_level)
     }