1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Regression test for #47244: in this specific scenario, when the
12 // expected type indicated 1 argument but the closure takes two, we
13 // would (early on) create type variables for the type of `b`. If the
14 // user then attempts to invoke a method on `b`, we would get an error
15 // saying that the type of `b` must be known, which was not very
20 use std::collections::HashMap;
23 let mut m = HashMap::new();
24 m.insert("foo", "bar");
26 let _n = m.iter().map(|_, b| {
27 //~^ ERROR closure is expected to take a single 2-tuple