| // Copyright 2018 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. |
| |
| #[derive(Copy, Clone)] |
| enum Void {} |
| |
| // Tests that we detect unsafe places (specifically, union fields and |
| // raw pointer dereferences), even when they're matched on while having |
| // an uninhabited type (equivalent to `std::intrinsics::unreachable()`). |
| |
| fn union_field() { |
| union Union { unit: (), void: Void } |
| let u = Union { unit: () }; |
| match u.void {} |
| //~^ ERROR access to union field is unsafe |
| } |
| |
| fn raw_ptr_deref() { |
| let ptr = std::ptr::null::<Void>(); |
| match *ptr {} |
| //~^ ERROR dereference of raw pointer is unsafe |
| } |
| |
| fn main() {} |
