ices/82836.rs: fixed with no errors

[github-actions]

Issue: rust-lang/rust#82836

extern "C" fn _panic<'a, T: ?Sized>() -> Option<&'a T> {
    panic!()
}

fn main() {}

=== stdout ===
=== stderr ===
warning: `extern` fn uses type `Option<&T>`, which is not FFI-safe
 --> /home/runner/work/glacier/glacier/ices/82836.rs:1:42
  |
1 | extern "C" fn _panic<'a, T: ?Sized>() -> Option<&'a T> {
  |                                          ^^^^^^^^^^^^^ not FFI-safe
  |
  = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
  = note: enum has no representation hint
  = note: `#[warn(improper_ctypes_definitions)]` on by default

warning: 1 warning emitted

==============