Bevy version

main branch c4b8210

Operating system & version

Fedora 33

What you did

Write any AssetLoader that panics, like so:

#[derive(Default)]
pub struct EvilLoader;

impl AssetLoader for EvilLoader {
    fn load<'a>(
        &'a self,
        bytes: &'a [u8],
        load_context: &'a mut LoadContext,
    ) -> BoxedFuture<'a, Result<()>> {
        Box::pin(async move { panic!("malevolence") })
    }

    fn extensions(&self) -> &[&str] {
        &["evil"]
    }
}

Any attempt to load the evil asset will kill the IO Thread, in a 4 thread cpu like mine this means that if I got 1 panic not asset can be loaded after

What you expected to happen

A panic should closes bevy or at least restart the IO Thread so the app doesn't hangs

What actually happened

Bevy just hangs and nothing else loads