error[E0618]: expected function, found enum variant `X::Entry`
  --> $DIR/E0618.rs:6:5
   |
LL |     Entry,
   |     ----- enum variant `X::Entry` defined here
...
LL |     X::Entry();
   |     ^^^^^^^^--
   |     |
   |     call expression requires function
   |
help: `X::Entry` is a unit enum variant, and does not take parentheses to be constructed
   |
LL -     X::Entry();
LL +     X::Entry;
   |

error[E0618]: expected function, found `i32`
  --> $DIR/E0618.rs:9:5
   |
LL |     let x = 0i32;
   |         - `x` has type `i32`
LL |     x();
   |     ^--
   |     |
   |     call expression requires function

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0618`.