1 // Regression test for #53570. Here, we need to propagate that `T: 'a`
2 // but in some versions of NLL we were propagating a stronger
3 // requirement that `T: 'static`. This arose because we actually had
4 // to propagate both that `T: 'a` but also `T: 'b` where `'b` is the
5 // higher-ranked lifetime that appears in the type of the closure
6 // parameter `x` -- since `'b` cannot be expressed in the caller's
7 // space, that got promoted th `'static`.
11 use std::cell::{RefCell, Ref};
17 fn unwrap<'a, 'b>(vec: &'b dyn AnyVec<'a>) -> &'b [T] where T: 'a;
20 struct Scratchpad<'a> {
21 buffers: RefCell<Box<dyn AnyVec<'a>>>,
24 impl<'a> Scratchpad<'a> {
25 fn get<T: GenericVec<T>>(&self) -> Ref<[T]>
28 Ref::map(self.buffers.borrow(), |x| T::unwrap(x.as_ref()))