Scoping error on setheading when wrapping a Graphics Box in a DoIt Box

[rigdern]

Repro steps

I reproed this with Boxer 3.4.18 2024-05-26 on macOS

1. Create a Graphics Box. Name it graphics. Name its sprite turtle-sprite.
2. Outside of the Graphics Box, write a line like this that sets the sprite's heading to a random value:
   

Unexpected result: An error is returned:

Error: 
Primitive SETHEADING
Don't have a Sprite to Talk to

Repro file

You can see the bug in this boxer file: scoping demo.box.zip. Here's a screenshot of that file:

[sgithens]

Huh, this is a pretty interesting issue, thank you for the detailed reproduction, including both working and failing tests. We've had this sort of "not having a sprite issue to talk to" issue pop up here and there and occasionally. I hope this detailed set of test cases should make it relatively easy to track down. Thanks much!