Simple VideoStreamPlayback causes thread panic

[funatsufumiya]

I just created VideoStreamPlayback as just simple as possible (with dummy data), causes thread error.
https://github.com/funatsufumiya/godot_test_video_stream

• code: src/lib.rs

First error shows use the "experimental-threads" feature, but when enabled it, still panic occurs when some audio IOThread interrupted.

thread '<unnamed>' panicked at /xxx/.cargo/git/checkouts/gdext-76630c89719e160c/8163134/godot-ffi/src/binding/single_threaded.rs:100:13:
assertion `left == right` failed: attempted to access binding from different thread than main thread; this is UB - use the "experimental-threads" feature.
  left: ThreadId(1)
 right: ThreadId(2)

thread '<unnamed>' panicked at /xxx/.cargo/git/checkouts/gdext-76630c89719e160c/8163134/godot-core/src/storage/multi_threaded.rs:59:13:
Gd<T>::bind() failed, already bound; T = godot_test_video_stream::TestVideoStreamPlayback.
  Make sure to use `self.base_mut()` or `self.base()` instead of `self.to_gd()` when possible.
  Details: cannot borrow while accessible mutable borrow exists.

• Full error log (backtrace) without experimental-threads:
  error_without_experimental_threads.txt

• Full error log (backtrace) with experimental-threads:
  error_with_experimental_threads.txt

• Error report from macOS (also same error occurs on Windows):
  error_report_mac.txt

[Bromeon]

First error shows use the "experimental-threads" feature, but when enabled it, still panic occurs when some audio IOThread interrupted.

Can you elaborate on this error? I assume the panic is different?

[funatsufumiya]

@Bromeon
Probably the reason of the panic is the same. But I don't know what is happening behind, maybe some audio event about video processing, while this example doesn't treat any audios or real video decoding (just template).

[funatsufumiya]

Thank you very much for fixing this bug. I confirmed it and updated my example's Cargo.lock: https://github.com/funatsufumiya/godot_test_video_stream

[Bromeon]

Thanks for testing, glad to hear it works!
The credits really go to @TitanNano who has done an amazing job with the script instance APIs! 💪