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use std::collections::HashMap;
trait Map<K, V>
{
fn get(&self, k: K) -> V { panic!() }
}
impl<K, V> Map<K, V> for HashMap<K, V> {}
// Test that trait types printed in error msgs include the type arguments.
fn main() {
let x: Box<HashMap<isize, isize>> = HashMap::new().into();
let x: Box<dyn Map<isize, isize>> = x;
let y: Box<dyn Map<usize, isize>> = Box::new(x);
//~^ ERROR `Box<dyn Map<isize, isize>>: Map<usize, isize>` is not satisfied
}
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