avm2: Don't create new texts/sprites/buttons with an empty movie

core/src/avm2/globals/flash/display/sprite.rs

@@ -7,8 +7,6 @@ use crate::avm2::value::Value;
 use crate::avm2::Error;
 use crate::avm2::Multiname;
 use crate::display_object::{MovieClip, SoundTransform, TDisplayObject};
-use crate::tag_utils::SwfMovie;
-use std::sync::Arc;
 use swf::{Rectangle, Twips};
 
 /// Implements `flash.display.Sprite`'s `init` method, which is called from the constructor
@@ -35,7 +33,7 @@ pub fn init_empty_sprite<'gc>(
     let class_object = this
         .instance_of()
         .ok_or("Attempted to construct Sprite on a bare object")?;
-    let movie = Arc::new(SwfMovie::empty(activation.context.swf.version()));
+    let movie = activation.context.swf.clone();
     let new_do = MovieClip::new_with_avm2(movie, this, class_object, activation.context.gc_context);
 
     this.init_display_object(&mut activation.context, new_do.into());

core/src/avm2/globals/flash/text/text_field.rs

@@ -8,9 +8,7 @@ use crate::avm2::Error;
 use crate::display_object::{AutoSizeMode, EditText, TDisplayObject, TextSelection};
 use crate::html::TextFormat;
 use crate::string::AvmString;
-use crate::tag_utils::SwfMovie;
 use crate::{avm2_stub_getter, avm2_stub_setter};
-use std::sync::Arc;
 use swf::Color;
 
 /// Implements `flash.text.TextField`'s `init` method, which is called from the constructor.
@@ -23,7 +21,7 @@ pub fn init<'gc>(
         activation.super_init(this, &[])?;
 
         if this.as_display_object().is_none() {
-            let movie = Arc::new(SwfMovie::empty(activation.context.swf.version()));
+            let movie = activation.context.swf.clone();
             let new_do = EditText::new(&mut activation.context, movie, 0.0, 0.0, 100.0, 100.0);
 
             this.init_display_object(&mut activation.context, new_do.into());

core/src/display_object/avm2_button.rs

@@ -137,7 +137,7 @@ impl<'gc> Avm2Button<'gc> {
     }
 
     pub fn empty_button(context: &mut UpdateContext<'_, 'gc>) -> Self {
-        let movie = Arc::new(SwfMovie::empty(context.swf.version()));
+        let movie = context.swf.clone();
         let button_record = swf::Button {
             id: 0,
             is_track_as_menu: false,