// Regression test for #53570. Here, we need to propagate that `T: 'a` // but in some versions of NLL we were propagating a stronger // requirement that `T: 'static`. This arose because we actually had // to propagate both that `T: 'a` but also `T: 'b` where `'b` is the // higher-ranked lifetime that appears in the type of the closure // parameter `x` -- since `'b` cannot be expressed in the caller's // space, that got promoted th `'static`. // // build-pass (FIXME(62277): could be check-pass?) use std::cell::{RefCell, Ref}; trait AnyVec<'a> { } trait GenericVec { fn unwrap<'a, 'b>(vec: &'b dyn AnyVec<'a>) -> &'b [T] where T: 'a; } struct Scratchpad<'a> { buffers: RefCell>>, } impl<'a> Scratchpad<'a> { fn get>(&self) -> Ref<[T]> where T: 'a { Ref::map(self.buffers.borrow(), |x| T::unwrap(x.as_ref())) } } fn main() { }