src/test/ui/run-pass/issues/issue-11709.rs

   1 // Copyright 2014 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.
   4 //
   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.
  10
  11 // run-pass
  12 // ignore-pretty issue #37199
  13
  14 // Don't panic on blocks without results
  15 // There are several tests in this run-pass that raised
  16 // when this bug was opened. The cases where the compiler
  17 // panics before the fix have a comment.
  18
  19 struct S {x:()}
  20
  21 fn test(slot: &mut Option<Box<FnMut() -> Box<FnMut()>>>) -> () {
  22   let a = slot.take();
  23   let _a = match a {
  24     // `{let .. a(); }` would break
  25     Some(mut a) => { let _a = a(); },
  26     None => (),
  27   };
  28 }
  29
  30 fn not(b: bool) -> bool {
  31     if b {
  32         !b
  33     } else {
  34         // `panic!(...)` would break
  35         panic!("Break the compiler");
  36     }
  37 }
  38
  39 pub fn main() {
  40     // {} would break
  41     let _r = {};
  42     let mut slot = None;
  43     // `{ test(...); }` would break
  44     let _s : S  = S{ x: { test(&mut slot); } };
  45
  46     let _b = not(true);
  47 }