error[E0533]: expected value, found struct variant `Foo::Variant`
  --> $DIR/issue-18252.rs:6:13
   |
LL |     let f = Foo::Variant(42);
   |             ^^^^^^^^^^^^ not a value
   |
help: you might have meant to create a new value of the struct
   |
LL |     let f = Foo::Variant { x: /* value */ };
   |                          ~~~~~~~~~~~~~~~~~~

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0533`.