gcc/testsuite/rust/compile/multiple_bindings1.rs

#![feature(lang_items)]
#[lang = "sized"]
pub trait Sized {}

#[lang = "fn_once"]
trait FnOnce<Args> {
    type Output;

    fn call_once(self, args: Args) -> Self::Output;
}

fn f1(i: i32, i: i32) {}
// { dg-error "identifier .i. is bound more than once in the same parameter list .E0415." "" { target *-*-* } .-1 }

trait Foo {
    fn f2(i: i32, i: i32) {}
    // { dg-error "identifier .i. is bound more than once in the same parameter list .E0415." "" { target *-*-* } .-1 }
}

trait Bar {
    fn f3(i: i32, j: i32) {}
}

struct S;

impl S {
    fn f4(i: i32, i: i32) {}
    // { dg-error "identifier .i. is bound more than once in the same parameter list .E0415." "" { target *-*-* } .-1 }
}

impl Bar for S {
    fn f3(i: i32, i: i32) {}
    // { dg-error "identifier .i. is bound more than once in the same parameter list .E0415." "" { target *-*-* } .-1 }
}

fn main() {
    let _ = |i, i| {};
    // { dg-error "identifier .i. is bound more than once in the same parameter list .E0415." "" { target *-*-* } .-1 }
}