error[E0658]: `impl Trait` in return position is experimental (see issue #34511) --> /Users/gaochuan/.cargo/registry/src/github.com-1ecc6299db9ec823/httpbis-0.6.1/src/common/conn.rs:988:33 | 988 | fn recv_http_frame(self) -> impl Future<Item=(Self, HttpFrame), Error=error::Error> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error[E0658]: `impl Trait` in argument position is experimental (see issue #34511) --> /Users/gaochuan/.cargo/registry/src/github.com-1ecc6299db9ec823/httpbis-0.6.1/src/client_died_error_holder.rs:32:39 | 32 | pub fn wrap_future(&self, future: impl Future<Item=(), Error=error::Error>) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error[E0658]: `impl Trait` in return position is experimental (see issue #34511) --> /Users/gaochuan/.cargo/registry/src/github.com-1ecc6299db9ec823/httpbis-0.6.1/src/client_died_error_holder.rs:33:12 | 33 | -> impl Future<Item=(), Error=()> | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Compiling protobuf-codegen v1.6.0 error[E0658]: non-reference pattern used to match a reference (see issue #42640) --> /Users/gaochuan/.cargo/registry/src/github.com-1ecc6299db9ec823/httpbis-0.6.1/src/req_resp.rs:10:13 | 10 | RequestOrResponse::Request => RequestOrResponse::Response, | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using a reference: `&RequestOrResponse::Request` error[E0658]: non-reference pattern used to match a reference (see issue #42640) --> /Users/gaochuan/.cargo/registry/src/github.com-1ecc6299db9ec823/httpbis-0.6.1/src/req_resp.rs:11:13 | 11 | RequestOrResponse::Response => RequestOrResponse::Request, | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using a reference: `&RequestOrResponse::Response` error: aborting due to 5 previous errors error: Could not compile `httpbis`. warning: build failed, waiting for other jobs to finish... error: build failed