ices/74244.rs: fixed with errors

=== stdout ===
=== stderr ===
error[E0658]: `impl Trait` in type aliases is unstable
  --> /home/runner/work/glacier/glacier/ices/74244.rs:15:10
   |
15 | type A = impl Fn(Matrix<<DefaultAllocator as Allocator<()>>::Buffer>);
   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #63063 <rust-lang/rust#63063> for more information
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error[E0392]: parameter `T` is never used
 --> /home/runner/work/glacier/glacier/ices/74244.rs:1:15
  |
1 | struct Matrix<T>;
  |               ^ unused parameter
  |
  = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`

error[E0392]: parameter `T` is never used
 --> /home/runner/work/glacier/glacier/ices/74244.rs:7:21
  |
7 | struct ArrayStorage<T> {}
  |                     ^ unused parameter
  |
  = help: consider removing `T`, referring to it in a field, or using a marker such as `PhantomData`

error[E0277]: expected a `Fn<(Matrix<ArrayStorage<()>>,)>` closure, found `impl Fn<(Matrix<<DefaultAllocator as Allocator<()>>::Buffer>,)>`
  --> /home/runner/work/glacier/glacier/ices/74244.rs:17:13
   |
15 | type A = impl Fn(Matrix<<DefaultAllocator as Allocator<()>>::Buffer>);
   |               ------------------------------------------------------- required by this bound in `A::{opaque#0}`
16 | 
17 | fn foo() -> A {
   |             ^ expected an `Fn<(Matrix<ArrayStorage<()>>,)>` closure, found `impl Fn<(Matrix<<DefaultAllocator as Allocator<()>>::Buffer>,)>`
   |
   = help: the trait `Fn<(Matrix<ArrayStorage<()>>,)>` is not implemented for `impl Fn<(Matrix<<DefaultAllocator as Allocator<()>>::Buffer>,)>`

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0277, E0392, E0658.
For more information about an error, try `rustc --explain E0277`.
==============

Author: rustbot