error[E0615]: attempted to take value of method `method` on type `Foo`
  --> $DIR/E0615.rs:21:7
   |
LL |     f.method; //~ ERROR E0615
   |       ^^^^^^
   |
   = help: maybe a `()` to call it is missing?

error: aborting due to previous error

For more information about this error, try `rustc --explain E0615`.