ices/97806.rs: fixed with errors

[github-actions]

Issue: rust-lang/rust#97806

struct TestErr<T> {
     field: std::marker::PhantomData<T>,
}

impl<T> TestErr<T> {
    fn func_a() {}

    fn func_b() {
        Self::func_a();

        let variable = None;
    }
}

fn main() {}

=== stdout ===
=== stderr ===
error[E0282]: type annotations needed for `Option<T>`
  --> /home/runner/work/glacier/glacier/ices/97806.rs:11:13
   |
11 |         let variable = None;
   |             ^^^^^^^^
   |
help: consider giving `variable` an explicit type, where the type for type parameter `T` is specified
   |
11 |         let variable: Option<T> = None;
   |                     +++++++++++

error: aborting due to previous error

For more information about this error, try `rustc --explain E0282`.
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