error[E0282]: type annotations needed
  --> $DIR/fully-qualified-path-impl-trait.rs:14:8
   |
LL |     ().foo(|| ())
   |        ^^^ cannot infer type for type parameter `T` declared on the trait `Foo`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0282`.