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// run-pass
#![allow(dead_code)]
// Regression test for #37154: the problem here was that the cache
// results in a false error because it was caching placeholder results
// even after those placeholder regions had been popped.
trait Foo {
fn method(&self) {}
}
struct Wrapper<T>(T);
impl<T> Foo for Wrapper<T> where for<'a> &'a T: IntoIterator<Item=&'a ()> {}
fn f(x: Wrapper<Vec<()>>) {
x.method(); // This works.
x.method(); // error: no method named `method`
}
fn main() { }
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