[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-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/reg/futures-sink-preview/0.3.0-alpha.10 [INFO] extracting crate futures-sink-preview 0.3.0-alpha.10 into work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/reg/futures-sink-preview/0.3.0-alpha.10 [INFO] validating manifest of futures-sink-preview-0.3.0-alpha.10 on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of futures-sink-preview-0.3.0-alpha.10 on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-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-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/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-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/reg/futures-sink-preview/0.3.0-alpha.10/Cargo.toml [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking futures-sink-preview-0.3.0-alpha.10 against master#f66e4697ae286985ddefc53c3a047614568458bb for pr-58592 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-5/master#f66e4697ae286985ddefc53c3a047614568458bb:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/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" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] c1ccb7244dece5deac79fd3ff976e05c2b4422c93282aa66025885a6d665ba92 [INFO] running `"docker" "start" "-a" "c1ccb7244dece5deac79fd3ff976e05c2b4422c93282aa66025885a6d665ba92"` [INFO] [stderr] Checking futures-core-preview v0.3.0-alpha.13 [INFO] [stderr] Checking futures-channel-preview v0.3.0-alpha.13 [INFO] [stderr] Checking futures-sink-preview v0.3.0-alpha.10 (/opt/crater/workdir) [INFO] [stderr] error[E0432]: unresolved import `futures_core::task::LocalWaker` [INFO] [stderr] --> src/lib.rs:12:26 [INFO] [stderr] | [INFO] [stderr] 12 | use futures_core::task::{LocalWaker, Poll}; [INFO] [stderr] | ^^^^^^^^^^ no `LocalWaker` in `task` [INFO] [stderr] [INFO] [stderr] error[E0432]: unresolved import `futures_core::task::LocalWaker` [INFO] [stderr] --> src/channel_impls.rs:2:5 [INFO] [stderr] | [INFO] [stderr] 2 | use futures_core::task::LocalWaker; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `LocalWaker` in `task` [INFO] [stderr] [INFO] [stderr] error[E0432]: unresolved import `futures_core::task::LocalWaker` [INFO] [stderr] --> src/lib.rs:12:26 [INFO] [stderr] | [INFO] [stderr] 12 | use futures_core::task::{LocalWaker, Poll}; [INFO] [stderr] | ^^^^^^^^^^ no `LocalWaker` in `task` [INFO] [stderr] [INFO] [stderr] error[E0432]: unresolved import `futures_core::task::LocalWaker` [INFO] [stderr] --> src/channel_impls.rs:2:5 [INFO] [stderr] | [INFO] [stderr] 2 | use futures_core::task::LocalWaker; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `LocalWaker` in `task` [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: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 16 previous errors [INFO] [stderr] [INFO] [stderr] Some errors occurred: E0432, E0599. [INFO] [stderr] For more information about an error, try `rustc --explain E0432`. [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 16 previous errors [INFO] [stderr] [INFO] [stderr] Some errors occurred: E0432, E0599. [INFO] [stderr] For more information about an error, try `rustc --explain E0432`. [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" "c1ccb7244dece5deac79fd3ff976e05c2b4422c93282aa66025885a6d665ba92"` [INFO] running `"docker" "rm" "-f" "c1ccb7244dece5deac79fd3ff976e05c2b4422c93282aa66025885a6d665ba92"` [INFO] [stdout] c1ccb7244dece5deac79fd3ff976e05c2b4422c93282aa66025885a6d665ba92