error[E0529]: expected an array or slice, found `u32`
  --> $DIR/issue-38371-unfixable.rs:1:9
   |
LL | fn ugh(&[bar]: &u32) {}
   |         ^^^^^ pattern cannot match with input type `u32`

error[E0308]: mismatched types
  --> $DIR/issue-38371-unfixable.rs:3:8
   |
LL | fn bgh(&&bar: u32) {}
   |        ^^^^^  --- expected due to this
   |        |
   |        expected `u32`, found `&_`
   |
   = note:   expected type `u32`
           found reference `&_`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0308, E0529.
For more information about an error, try `rustc --explain E0308`.