src/test/ui/inference/cannot-infer-async-enabled-impl-trait-bindings.rs

   1 // edition:2018
   2 #![feature(impl_trait_in_bindings)]
   3 //~^ WARN the feature `impl_trait_in_bindings` is incomplete
   4
   5 use std::io::Error;
   6
   7 fn make_unit() -> Result<(), Error> {
   8     Ok(())
   9 }
  10
  11 fn main() {
  12     let fut = async {
  13         make_unit()?; //~ ERROR type annotations needed
  14
  15         Ok(())
  16     };
  17 }