Running `EventLoop::run_return` in a separate thread does not work

[KyGost]

Creating an event loop, giving it to a context and then running it via run_return in a new thread seems to give peculiar behaviour and does not error.

[lcnr]

hmm, this looks like contexts simply shouldn't be Send/Sync or something like that 🤔 so I believe that instead of supporting this, it's probably far easier to error.

Do you have an MVCE for this? Should probably be enough to post the code for which you got this behavior

[KyGost]

Just something along the lines of:

let event_loop = EventLoop::new();
let mut context = Context::new(WindowBuilder::new(), &event_loop);
event_loop.run_return(...); // Works
thread::spawn(||{
  event_loop.run_return(...); // Doesn't work, weird graphical artifacting and whatnot
});