From fb1ebcb9cc0d60842b286c54a5f7de9335d8d7c3 Mon Sep 17 00:00:00 2001
From: Nathan Adams <dinnerbone@dinnerbone.com>
Date: Mon, 8 Aug 2022 23:20:32 +0200
Subject: [PATCH] avm1: loadMovieNum with blank url is an unload, not a load -
 fixes #7337

---
 core/src/avm1/activation.rs | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/core/src/avm1/activation.rs b/core/src/avm1/activation.rs
index 7c7821313..07ec81192 100644
--- a/core/src/avm1/activation.rs
+++ b/core/src/avm1/activation.rs
@@ -1291,14 +1291,21 @@ impl<'a, 'gc, 'gc_context> Activation<'a, 'gc, 'gc_context> {
         } else if level_target > -1 {
             // `loadMovieNum` call.
             if let Some(clip_target) = clip_target {
-                let future = self.context.load_manager.load_movie_into_clip(
-                    self.context.player.clone(),
-                    clip_target,
-                    Request::get(url.to_utf8_lossy().into_owned()),
-                    None,
-                    None,
-                );
-                self.context.navigator.spawn_future(future);
+                if url.is_empty() {
+                    // Blank URL on movie loads = unload!
+                    if let Some(mut mc) = clip_target.as_movie_clip() {
+                        mc.replace_with_movie(&mut self.context, None)
+                    }
+                } else {
+                    let future = self.context.load_manager.load_movie_into_clip(
+                        self.context.player.clone(),
+                        clip_target,
+                        Request::get(url.to_utf8_lossy().into_owned()),
+                        None,
+                        None,
+                    );
+                    self.context.navigator.spawn_future(future);
+                }
             }
             return Ok(FrameControl::Continue);
         }