src/test/compile-fail/catch-bad-type.rs

// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

#![feature(catch_expr)]

pub fn main() {
    let res: Result<u32, i32> = do catch {
        Err("")?; //~ ERROR the trait bound `i32: std::convert::From<&str>` is not satisfied
        5
    };

    let res: Result<i32, i32> = do catch {
        "" //~ ERROR type mismatch
    };

    let res: Result<i32, i32> = do catch { }; //~ ERROR type mismatch

    let res: () = do catch { }; //~ the trait bound `(): std::ops::Try` is not satisfied

    let res: i32 = do catch { 5 }; //~ ERROR the trait bound `i32: std::ops::Try` is not satisfied
}