[INFO] crate futures-sink-preview 0.3.0-alpha.10 is already in cache
[INFO] extracting crate futures-sink-preview 0.3.0-alpha.10 into work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/reg/futures-sink-preview/0.3.0-alpha.10
[INFO] extracting crate futures-sink-preview 0.3.0-alpha.10 into work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/reg/futures-sink-preview/0.3.0-alpha.10
[INFO] validating manifest of futures-sink-preview-0.3.0-alpha.10 on toolchain master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of futures-sink-preview-0.3.0-alpha.10 on toolchain try#29640c57b5f92febba0e40c50cb863c9a7ede51d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing futures-sink-preview-0.3.0-alpha.10
[INFO] finished frobbing futures-sink-preview-0.3.0-alpha.10
[INFO] frobbed toml for futures-sink-preview-0.3.0-alpha.10 written to work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/reg/futures-sink-preview/0.3.0-alpha.10/Cargo.toml
[INFO] started frobbing futures-sink-preview-0.3.0-alpha.10
[INFO] finished frobbing futures-sink-preview-0.3.0-alpha.10
[INFO] frobbed toml for futures-sink-preview-0.3.0-alpha.10 written to work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/reg/futures-sink-preview/0.3.0-alpha.10/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking futures-sink-preview-0.3.0-alpha.10 against try#29640c57b5f92febba0e40c50cb863c9a7ede51d for pr-57745
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57745/worker-3/try#29640c57b5f92febba0e40c50cb863c9a7ede51d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/reg/futures-sink-preview/0.3.0-alpha.10:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9ddd568f5e515f6ce3de8e1fb10999ea0d358b9abec88ad192ece0f51750d4a2
[INFO] running `"docker" "start" "-a" "9ddd568f5e515f6ce3de8e1fb10999ea0d358b9abec88ad192ece0f51750d4a2"`
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.10 (/opt/crater/workdir)
[INFO] [stderr] error[E0599]: no function or associated item named `get_mut_unchecked` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:177:27
[INFO] [stderr]     |
[INFO] [stderr] 177 |             unsafe { Pin::get_mut_unchecked(self) }.push(item);
[INFO] [stderr]     |                      -----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      function or associated item not found in `std::pin::Pin<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `get_mut_unchecked` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:200:27
[INFO] [stderr]     |
[INFO] [stderr] 200 |             unsafe { Pin::get_mut_unchecked(self) }.push_back(item);
[INFO] [stderr]     |                      -----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      function or associated item not found in `std::pin::Pin<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `get_mut_unchecked` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:251:24
[INFO] [stderr]     |
[INFO] [stderr] 251 |             match Pin::get_mut_unchecked(self) {
[INFO] [stderr]     |                   -----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   function or associated item not found in `std::pin::Pin<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `poll_ready` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:252:58
[INFO] [stderr]     |
[INFO] [stderr] 252 |                 Either::Left(x) => Pin::new_unchecked(x).poll_ready(lw),
[INFO] [stderr]     |                                                          ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `poll_ready`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `poll_ready` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:253:59
[INFO] [stderr]     |
[INFO] [stderr] 253 |                 Either::Right(x) => Pin::new_unchecked(x).poll_ready(lw),
[INFO] [stderr]     |                                                           ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `poll_ready`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `get_mut_unchecked` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:260:24
[INFO] [stderr]     |
[INFO] [stderr] 260 |             match Pin::get_mut_unchecked(self) {
[INFO] [stderr]     |                   -----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   function or associated item not found in `std::pin::Pin<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `start_send` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:261:58
[INFO] [stderr]     |
[INFO] [stderr] 261 |                 Either::Left(x) => Pin::new_unchecked(x).start_send(item),
[INFO] [stderr]     |                                                          ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `start_send`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `start_send` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:262:59
[INFO] [stderr]     |
[INFO] [stderr] 262 |                 Either::Right(x) => Pin::new_unchecked(x).start_send(item),
[INFO] [stderr]     |                                                           ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `start_send`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `get_mut_unchecked` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:269:24
[INFO] [stderr]     |
[INFO] [stderr] 269 |             match Pin::get_mut_unchecked(self) {
[INFO] [stderr]     |                   -----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   function or associated item not found in `std::pin::Pin<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `poll_flush` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:270:58
[INFO] [stderr]     |
[INFO] [stderr] 270 |                 Either::Left(x) => Pin::new_unchecked(x).poll_flush(lw),
[INFO] [stderr]     |                                                          ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `poll_flush`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `poll_flush` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:271:59
[INFO] [stderr]     |
[INFO] [stderr] 271 |                 Either::Right(x) => Pin::new_unchecked(x).poll_flush(lw),
[INFO] [stderr]     |                                                           ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `poll_flush`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `get_mut_unchecked` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:278:24
[INFO] [stderr]     |
[INFO] [stderr] 278 |             match Pin::get_mut_unchecked(self) {
[INFO] [stderr]     |                   -----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   function or associated item not found in `std::pin::Pin<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `poll_close` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:279:58
[INFO] [stderr]     |
[INFO] [stderr] 279 |                 Either::Left(x) => Pin::new_unchecked(x).poll_close(lw),
[INFO] [stderr]     |                                                          ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `poll_close`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `poll_close` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:280:59
[INFO] [stderr]     |
[INFO] [stderr] 280 |                 Either::Right(x) => Pin::new_unchecked(x).poll_close(lw),
[INFO] [stderr]     |                                                           ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `poll_close`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 14 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `futures-sink-preview`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0599]: no function or associated item named `get_mut_unchecked` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:177:27
[INFO] [stderr]     |
[INFO] [stderr] 177 |             unsafe { Pin::get_mut_unchecked(self) }.push(item);
[INFO] [stderr]     |                      -----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      function or associated item not found in `std::pin::Pin<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `get_mut_unchecked` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:200:27
[INFO] [stderr]     |
[INFO] [stderr] 200 |             unsafe { Pin::get_mut_unchecked(self) }.push_back(item);
[INFO] [stderr]     |                      -----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      function or associated item not found in `std::pin::Pin<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `get_mut_unchecked` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:251:24
[INFO] [stderr]     |
[INFO] [stderr] 251 |             match Pin::get_mut_unchecked(self) {
[INFO] [stderr]     |                   -----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   function or associated item not found in `std::pin::Pin<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `poll_ready` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:252:58
[INFO] [stderr]     |
[INFO] [stderr] 252 |                 Either::Left(x) => Pin::new_unchecked(x).poll_ready(lw),
[INFO] [stderr]     |                                                          ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `poll_ready`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `poll_ready` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:253:59
[INFO] [stderr]     |
[INFO] [stderr] 253 |                 Either::Right(x) => Pin::new_unchecked(x).poll_ready(lw),
[INFO] [stderr]     |                                                           ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `poll_ready`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `get_mut_unchecked` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:260:24
[INFO] [stderr]     |
[INFO] [stderr] 260 |             match Pin::get_mut_unchecked(self) {
[INFO] [stderr]     |                   -----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   function or associated item not found in `std::pin::Pin<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `start_send` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:261:58
[INFO] [stderr]     |
[INFO] [stderr] 261 |                 Either::Left(x) => Pin::new_unchecked(x).start_send(item),
[INFO] [stderr]     |                                                          ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `start_send`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `start_send` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:262:59
[INFO] [stderr]     |
[INFO] [stderr] 262 |                 Either::Right(x) => Pin::new_unchecked(x).start_send(item),
[INFO] [stderr]     |                                                           ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `start_send`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `get_mut_unchecked` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:269:24
[INFO] [stderr]     |
[INFO] [stderr] 269 |             match Pin::get_mut_unchecked(self) {
[INFO] [stderr]     |                   -----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   function or associated item not found in `std::pin::Pin<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `poll_flush` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:270:58
[INFO] [stderr]     |
[INFO] [stderr] 270 |                 Either::Left(x) => Pin::new_unchecked(x).poll_flush(lw),
[INFO] [stderr]     |                                                          ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `poll_flush`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `poll_flush` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:271:59
[INFO] [stderr]     |
[INFO] [stderr] 271 |                 Either::Right(x) => Pin::new_unchecked(x).poll_flush(lw),
[INFO] [stderr]     |                                                           ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `poll_flush`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `get_mut_unchecked` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:278:24
[INFO] [stderr]     |
[INFO] [stderr] 278 |             match Pin::get_mut_unchecked(self) {
[INFO] [stderr]     |                   -----^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   function or associated item not found in `std::pin::Pin<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `poll_close` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:279:58
[INFO] [stderr]     |
[INFO] [stderr] 279 |                 Either::Left(x) => Pin::new_unchecked(x).poll_close(lw),
[INFO] [stderr]     |                                                          ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `poll_close`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `poll_close` found for type `std::pin::Pin<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:280:59
[INFO] [stderr]     |
[INFO] [stderr] 280 |                 Either::Right(x) => Pin::new_unchecked(x).poll_close(lw),
[INFO] [stderr]     |                                                           ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: Pin::new_unchecked(x) is a function, perhaps you wish to call it
[INFO] [stderr]     = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]     = note: the following trait defines an item `poll_close`, perhaps you need to implement it:
[INFO] [stderr]             candidate #1: `Sink`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 14 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `futures-sink-preview`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9ddd568f5e515f6ce3de8e1fb10999ea0d358b9abec88ad192ece0f51750d4a2"`
[INFO] running `"docker" "rm" "-f" "9ddd568f5e515f6ce3de8e1fb10999ea0d358b9abec88ad192ece0f51750d4a2"`
[INFO] [stdout] 9ddd568f5e515f6ce3de8e1fb10999ea0d358b9abec88ad192ece0f51750d4a2