struct TheStruct<'a> {
        buffer: Vec<Option<&'a u8>>,
    }
    trait FakeIterator<'a> {
        fn into_iter(self) -> core::iter::FromFn<impl FnMut() -> Option<&'a mut Option<&'a u8>>>;
    }
    impl<'a> FakeIterator<'a> for &'a mut TheStruct<'a> {
        fn into_iter(self) -> core::iter::FromFn<impl FnMut() -> Option<&'a mut Option<&'a u8>>> {
            core::iter::from_fn(move || {
                self.buffer.push(None);
                let len = self.buffer.len() - 1;
                (*self).buffer.get_mut(len)
            })
        }
     }

I need help as such first I tried Iterator realizing 2 &mut alias
Then IntoIterator but realizing TAITs is needed but it's not stabilized
then this fakeIterator returning an iterator but the error keep saying "reference may escape in FnMut" (paraphased)
I wanted an iterator that never returns None (not iter::cycle as such clones to keep it alive) that mutates TheStruct

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