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use std::marker::PhantomData;
struct Example<E, FakeParam>(PhantomData<(fn(E), fn(FakeParam))>);
struct NoLifetime;
struct Immutable<'a>(PhantomData<&'a ()>);
impl<'a, E: 'a> Copy for Example<E, Immutable<'a>> {}
impl<'a, E: 'a> Clone for Example<E, Immutable<'a>> {
fn clone(&self) -> Self {
*self
}
}
impl<E, FakeParam> Example<E, FakeParam> {
unsafe fn change<NewFakeParam>(self) -> Example<E, NewFakeParam> {
Example(PhantomData)
}
}
impl<E> Example<E, NoLifetime> {
fn the_ice(&mut self) -> Example<E, Immutable<'_>> {
unsafe { self.change() }
//~^ ERROR cannot move out of `*self` which is behind a mutable reference
}
}
fn main() {}
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