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Issue: rust-lang/rust#95311

#![feature(ptr_metadata)]

trait Bar: Sized + 'static { }

struct Foo<B: Bar> {
    marker: std::marker::PhantomData<B>,
}

impl<B: Bar> Foo<B> {
    fn foo<T: ?Sized>(value: &T) {
        std::ptr::metadata(value);
    }
}

pub fn main() {}
=== stdout ===
=== stderr ===
warning: struct is never constructed: `Foo`
 --> /home/runner/work/glacier/glacier/ices/95311.rs:5:8
  |
5 | struct Foo<B: Bar> {
  |        ^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: associated function is never used: `foo`
  --> /home/runner/work/glacier/glacier/ices/95311.rs:10:8
   |
10 |     fn foo<T: ?Sized>(value: &T) {
   |        ^^^

warning: 2 warnings emitted

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

=== stdout ===
=== stderr ===
warning: struct is never constructed: `Foo`
 --> /home/runner/work/glacier/glacier/ices/95311.rs:5:8
  |
5 | struct Foo<B: Bar> {
  |        ^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: associated function is never used: `foo`
  --> /home/runner/work/glacier/glacier/ices/95311.rs:10:8
   |
10 |     fn foo<T: ?Sized>(value: &T) {
   |        ^^^

warning: 2 warnings emitted

==============
@JohnTitor JohnTitor merged commit 4d2f39d into master Apr 15, 2022
@JohnTitor JohnTitor deleted the autofix/ices/95311.rs branch April 15, 2022 12:13
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2 participants