ices/69396.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#69396

macro_rules! suite {
    ( $( $fn:ident; )* ) => {
        $(
            const A = "A".$fn();
        )*
    }
}

suite! {
    len;
    is_empty;
}

fn main() {}

=== stdout ===
=== stderr ===
error[E0428]: the name `A` is defined multiple times
  --> /home/runner/work/glacier/glacier/ices/69396.rs:4:13
   |
4  |               const A = "A".$fn();
   |               ^^^^^^^^^^^^^^^^^^^^
   |               |
   |               `A` redefined here
   |               previous definition of the value `A` here
...
9  | / suite! {
10 | |     len;
11 | |     is_empty;
12 | | }
   | |_- in this macro invocation
   |
   = note: `A` must be defined only once in the value namespace of this module
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: missing type for `const` item
  --> /home/runner/work/glacier/glacier/ices/69396.rs:4:19
   |
4  |               const A = "A".$fn();
   |                     ^ help: provide a type for the item: `A: usize`
...
9  | / suite! {
10 | |     len;
11 | |     is_empty;
12 | | }
   | |_- in this macro invocation
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0121]: the type placeholder `_` is not allowed within types on item signatures
  --> /home/runner/work/glacier/glacier/ices/69396.rs:4:19
   |
4  |               const A = "A".$fn();
   |                     ^
   |                     |
   |                     not allowed in type signatures
   |                     help: replace `_` with the correct type: `bool`
...
9  | / suite! {
10 | |     len;
11 | |     is_empty;
12 | | }
   | |_- in this macro invocation
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0121, E0428.
For more information about an error, try `rustc --explain E0121`.
==============