error[E0283]: type annotations required: cannot resolve `_: Generator`
  --> $DIR/E0283.rs:18:21
   |
LL |     let cont: u32 = Generator::create(); //~ ERROR E0283
   |                     ^^^^^^^^^^^^^^^^^
   |
note: required by `Generator::create`
  --> $DIR/E0283.rs:2:5
   |
LL |     fn create() -> u32;
   |     ^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0283`.