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error[E0521]: borrowed data escapes outside of function
--> $DIR/trait-objects.rs:15:5
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LL | fn min_size(x: &mut dyn for<'a> StreamingIterator<Item<'a> = &'a i32>) -> usize {
| - - let's call the lifetime of this reference `'1`
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| `x` is a reference that is only valid in the function body
LL |
LL | x.size_hint().0
| ^^^^^^^^^^^^^
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| `x` escapes the function body here
| argument requires that `'1` must outlive `'static`
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= 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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