| // Copyright 2015 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. |
| |
| // Issue 22443: Reject code using non-regular types that would |
| // otherwise cause dropck to loop infinitely. |
| |
| use std::marker::PhantomData; |
| |
| struct Digit<T> { |
| elem: T |
| } |
| |
| struct Node<T:'static> { m: PhantomData<&'static T> } |
| |
| enum FingerTree<T:'static> { |
| Single(T), |
| // Bug report said Digit before Box would infinite loop (versus |
| // Digit after Box; see dropck_no_diverge_on_nonregular_1). |
| Deep( |
| Digit<T>, |
| Box<FingerTree<Node<T>>>, |
| ) |
| } |
| |
| fn main() { |
| let ft = //~ ERROR overflow while adding drop-check rules for FingerTree |
| FingerTree::Single(1); |
| //~^ ERROR overflow while adding drop-check rules for FingerTree |
| } |