ices/83471-2.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#83471

#![feature(lang_items)]
// #![feature(no_core)]
// #![no_core]

#[lang = "fn"]
trait MyFn<T> {
    const call: i32 = 42;
    //~^ ERROR: `call` trait item in `fn`/`fn_mut` lang item must be a function
}

#[lang = "fn_mut"]
trait MyFnMut<T> {
    fn call(i: i32, j: i32) -> i32 { i + j }
    //~^ ERROR: first argument of `call` in `fn`/`fn_mut` lang item must be a reference
}

fn main() {
    let a = || 42;
    a();

    let mut i = 0;
    let mut b = || { i += 1; };
    b();
}

=== stdout ===
=== stderr ===
error[E0152]: found duplicate lang item `fn`
 --> /home/runner/work/glacier/glacier/ices/83471-2.rs:6:1
  |
6 | / trait MyFn<T> {
7 | |     const call: i32 = 42;
8 | |     //~^ ERROR: `call` trait item in `fn`/`fn_mut` lang item must be a function
9 | | }
  | |_^
  |
  = note: the lang item is first defined in crate `core` (which `std` depends on)
  = note: first definition in `core` loaded from /usr/share/rust/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-0e3656b1fda5fd7b.rlib
  = note: second definition in the local crate (`83471_2`)

error[E0152]: found duplicate lang item `fn_mut`
  --> /home/runner/work/glacier/glacier/ices/83471-2.rs:12:1
   |
12 | / trait MyFnMut<T> {
13 | |     fn call(i: i32, j: i32) -> i32 { i + j }
14 | |     //~^ ERROR: first argument of `call` in `fn`/`fn_mut` lang item must be a reference
15 | | }
   | |_^
   |
   = note: the lang item is first defined in crate `core` (which `std` depends on)
   = note: first definition in `core` loaded from /usr/share/rust/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-0e3656b1fda5fd7b.rlib
   = note: second definition in the local crate (`83471_2`)

error: `call` trait item in `fn` lang item must be a function
 --> /home/runner/work/glacier/glacier/ices/83471-2.rs:7:5
  |
7 |     const call: i32 = 42;
  |     ^^^^^^^^^^^^^^^^^^^^^

error: first argument of `call` in `fn_mut` lang item must be a reference
  --> /home/runner/work/glacier/glacier/ices/83471-2.rs:13:16
   |
13 |     fn call(i: i32, j: i32) -> i32 { i + j }
   |                ^^^

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0152`.
==============