use bevy_ecs::prelude::*;

#[derive(Component)]
struct A(&'static u8);

fn panics() -> A {
    // Just to avoid printing the panic message, but any panic!() works 
    std::panic::resume_unwind(Box::new(()));
}

#[derive(Component)]
#[require(A = panics())]
struct B;

let mut world = World::new();

let mut e = world.spawn_empty();

std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {
    e.insert(B);
}));

// The EntityWorldMut thinks it's still at the old location
assert!(!e.contains::<A>());

let id = e.id();
let e = world.entity_mut(id);

// But after refetching the location it thinks it's at the new location, but A is not initialized.
println!("{}", e.get::<A>().unwrap().0);