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error[E0521]: borrowed data escapes outside of function
--> $DIR/hrtb-implied-2.rs:18:17
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LL | fn fails<I: LendingIterator, F>(iter: &mut I, f: F) -> bool
| ---- - let's call the lifetime of this reference `'1`
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| `iter` is a reference that is only valid in the function body
...
LL | let _next = iter2.next();
| ^^^^^^^^^^^^
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| `iter` escapes the function body here
| argument requires that `'1` must outlive `'static`
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= note: requirement occurs because of a mutable reference to `Eat<&mut I, F>`
= note: mutable references are invariant over their type parameter
= help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
= note: due to current limitations in the borrow checker, this implies a `'static` lifetime
error: aborting due to previous error
For more information about this error, try `rustc --explain E0521`.
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