File: coherence-free-vs-bound-region.rs

package info (click to toggle)
rustc 1.88.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 934,128 kB
  • sloc: xml: 158,127; python: 36,062; javascript: 19,855; sh: 19,700; cpp: 18,947; ansic: 12,993; asm: 4,792; makefile: 690; lisp: 29; perl: 29; ruby: 19; sql: 11
file content (21 lines) | stat: -rw-r--r-- 579 bytes parent folder | download | duplicates (16)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
// Capture a coherence pattern from wasm-bindgen that we discovered as part of
// future-compatibility warning #56105. This pattern currently receives a lint
// warning but we probably want to support it long term.
//
// Key distinction: we are implementing once for `A` (take ownership) and one
// for `&A` (borrow).
//
// c.f. #56105

#![deny(coherence_leak_check)]

trait TheTrait {}

impl<'a> TheTrait for fn(&'a u8) {}

impl TheTrait for fn(&u8) {
    //~^ ERROR conflicting implementations of trait
    //~| WARN the behavior may change in a future release
}

fn main() {}