File: orphan-check-projections-unsat-bounds.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (35 lines) | stat: -rw-r--r-- 883 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
// This used to ICE in an earlier iteration of #117164.
// The normalization performed during orphan checking happens inside an empty ParamEnv and
// with type parameters mapped to fresh infer vars. Therefore it may fail for example due to
// unsatisfied bounds while normalization outside of orphan checking succeeds.

//@ revisions: classic next
//@[next] compile-flags: -Znext-solver

//@ check-pass
//@ aux-crate:foreign=parametrized-trait.rs
//@ edition:2021

struct Wrapper<T>(T);

trait Bound {}

trait Discard { type Output; }

impl<T> Discard for Wrapper<T>
where
    Wrapper<T>: Bound
{
    type Output = LocalTy;
}

struct LocalTy;

impl<T> foreign::Trait1<LocalTy, T> for <Wrapper<T> as Discard>::Output
//~^ WARNING type parameter `T` must be covered by another type
//~| WARNING this was previously accepted by the compiler
where
    Wrapper<T>: Bound
{}

fn main() {}