File: issue-30438-c.rs

package info (click to toggle)
rustc-web 1.70.0%2Bdfsg1-7~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,517,036 kB
  • sloc: xml: 147,962; javascript: 10,210; sh: 8,590; python: 8,220; ansic: 5,901; cpp: 4,635; makefile: 4,006; asm: 2,856
file content (20 lines) | stat: -rw-r--r-- 593 bytes parent folder | download | duplicates (15)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
// Simplified regression test for #30438, inspired by arielb1.

trait Trait { type Out; }

struct Test<'a> { s: &'a str }

fn silly<'y, 'z>(_s: &'y Test<'z>) -> &'y <Test<'z> as Trait>::Out where 'z: 'static {
    let x = Test { s: "this cannot last" };
    &x
    //~^ ERROR: cannot return reference to local variable `x`
}

impl<'b> Trait for Test<'b> { type Out = Test<'b>; }

fn main() {
    let orig = Test { s: "Hello World" };
    let r = silly(&orig);
    println!("{}", orig.s); // OK since `orig` is valid
    println!("{}", r.s); // Segfault (method does not return a sane value)
}