error[E0308]: mismatched types
  --> $DIR/issue-50688.rs:12:9
   |
LL |     [1; || {}]; //~ ERROR mismatched types
   |         ^^^^^ expected usize, found closure
   |
   = note: expected type `usize`
              found type `[closure@$DIR/issue-50688.rs:12:9: 12:14]`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.