src/test/run-pass/issue-3556.rs

// Copyright 2013 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(managed_boxes)];

extern crate extra;

enum Token {
    Text(@~str),
    ETag(@~[~str], @~str),
    UTag(@~[~str], @~str),
    Section(@~[~str], bool, @~[Token], @~str, @~str, @~str, @~str, @~str),
    IncompleteSection(@~[~str], bool, @~str, bool),
    Partial(@~str, @~str, @~str),
}

fn check_strs(actual: &str, expected: &str) -> bool
{
    if actual != expected
    {
        println!("Found {}, but expected {}", actual, expected);
        return false;
    }
    return true;
}

pub fn main()
{
// assert!(check_strs(fmt!("%?", Text(@~"foo")), "Text(@~\"foo\")"));
// assert!(check_strs(fmt!("%?", ETag(@~[~"foo"], @~"bar")), "ETag(@~[ ~\"foo\" ], @~\"bar\")"));

    let t = Text(@~"foo");
    let u = Section(@~[~"alpha"], true, @~[t], @~"foo", @~"foo", @~"foo", @~"foo", @~"foo");
    let v = format!("{:?}", u);    // this is the line that causes the seg fault
    assert!(v.len() > 0);
}