[INFO] fetching crate ex-futures 0.4.9...
[INFO] checking ex-futures-0.4.9 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate ex-futures 0.4.9 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate ex-futures 0.4.9 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ex-futures 0.4.9
[INFO] finished tweaking crates.io crate ex-futures 0.4.9
[INFO] tweaked toml for crates.io crate ex-futures 0.4.9 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 59 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding bytes v0.4.12 (latest: v1.6.0)
[INFO] [stderr]       Adding cfg-if v0.1.10 (latest: v1.0.0)
[INFO] [stderr]       Adding cloudabi v0.0.3 (latest: v0.1.0)
[INFO] [stderr]       Adding crossbeam-deque v0.7.4 (latest: v0.8.5)
[INFO] [stderr]       Adding crossbeam-epoch v0.8.2 (latest: v0.9.18)
[INFO] [stderr]       Adding crossbeam-queue v0.2.3 (latest: v0.3.11)
[INFO] [stderr]       Adding crossbeam-utils v0.7.2 (latest: v0.8.19)
[INFO] [stderr]       Adding futures v0.1.31 (latest: v0.3.30)
[INFO] [stderr]       Adding lock_api v0.3.4 (latest: v0.4.11)
[INFO] [stderr]       Adding memoffset v0.5.6 (latest: v0.9.1)
[INFO] [stderr]       Adding mio v0.6.23 (latest: v0.8.11)
[INFO] [stderr]       Adding miow v0.2.2 (latest: v0.6.0)
[INFO] [stderr]       Adding parking_lot v0.9.0 (latest: v0.12.1)
[INFO] [stderr]       Adding parking_lot_core v0.6.3 (latest: v0.9.9)
[INFO] [stderr]       Adding redox_syscall v0.1.57 (latest: v0.5.1)
[INFO] [stderr]       Adding rustc_version v0.2.3 (latest: v0.4.0)
[INFO] [stderr]       Adding scoped-tls v0.1.2 (latest: v1.0.1)
[INFO] [stderr]       Adding semver v0.9.0 (latest: v1.0.22)
[INFO] [stderr]       Adding semver-parser v0.7.0 (latest: v0.10.2)
[INFO] [stderr]       Adding smallvec v0.6.14 (latest: v1.13.2)
[INFO] [stderr]       Adding tokio v0.1.22 (latest: v1.37.0)
[INFO] [stderr]       Adding winapi v0.2.8 (latest: v0.3.9)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ec4865cfadf3f87b08f8d63b4d14944ba2901a7e1aa55e77cb909259c6a71291
[INFO] running `Command { std: "docker" "start" "-a" "ec4865cfadf3f87b08f8d63b4d14944ba2901a7e1aa55e77cb909259c6a71291", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec4865cfadf3f87b08f8d63b4d14944ba2901a7e1aa55e77cb909259c6a71291", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec4865cfadf3f87b08f8d63b4d14944ba2901a7e1aa55e77cb909259c6a71291", kill_on_drop: false }`
[INFO] [stdout] ec4865cfadf3f87b08f8d63b4d14944ba2901a7e1aa55e77cb909259c6a71291
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 48823bfabc59d7419ffae1a59a39c3e5cf482528bdabf92561a136a2fd356936
[INFO] running `Command { std: "docker" "start" "-a" "48823bfabc59d7419ffae1a59a39c3e5cf482528bdabf92561a136a2fd356936", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking scoped-tls v0.1.2
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking crossbeam-deque v0.7.4
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking tokio-sync v0.1.8
[INFO] [stderr]     Checking ex-futures v0.4.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:19:19
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub type AsErr<S: Stream, E> = Then<
[INFO] [stdout]    |                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:21:15
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn(Result<S::Item, ()>) -> Result<S::Item, E>,
[INFO] [stdout]    |               ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:21:39
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn(Result<S::Item, ()>) -> Result<S::Item, E>,
[INFO] [stdout]    |                                       ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Result<S::Item, E>,
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]    |
[INFO] [stdout] 19 - pub type AsErr<S: Stream, E> = Then<
[INFO] [stdout] 19 + pub type AsErr<S, E> = Then<
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]   --> src/stream/unsync_cloneable.rs:33:15
[INFO] [stdout]    |
[INFO] [stdout] 33 | type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/unsync_cloneable.rs:33:56
[INFO] [stdout]    |
[INFO] [stdout] 33 | type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                        ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/unsync_cloneable.rs:33:66
[INFO] [stdout]    |
[INFO] [stdout] 33 | type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                                  ^^^^^^^^
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]    |
[INFO] [stdout] 33 - type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout] 33 + type Queue<S> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]   --> src/stream/cloneable.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 | type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/cloneable.rs:38:54
[INFO] [stdout]    |
[INFO] [stdout] 38 | type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                      ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/cloneable.rs:38:64
[INFO] [stdout]    |
[INFO] [stdout] 38 | type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                                ^^^^^^^^
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]    |
[INFO] [stdout] 38 - type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout] 38 + type Queue<S> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tokio-core v0.1.18
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> tests/stream_unsync_cloneable.rs:68:40
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let cloneable2 = cloneable.clone();;
[INFO] [stdout]    |                                        ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/sink_cloneable.rs:46:24
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn new_stream() -> Box<Stream<Item = usize, Error = SendError<usize>>> {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn new_stream() -> Box<dyn Stream<Item = usize, Error = SendError<usize>>> {
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> benches/stream_unsync_cloneable.rs:38:50
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let mut cloneable_rx2 = cloneable_rx.clone();;
[INFO] [stdout]    |                                                  ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> benches/stream_unsync_cloneable.rs:51:50
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let mut cloneable_rx2 = cloneable_rx.clone();;
[INFO] [stdout]    |                                                  ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> benches/stream_unsync_cloneable.rs:52:50
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut cloneable_rx3 = cloneable_rx.clone();;
[INFO] [stdout]    |                                                  ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> tests/stream_cloneable.rs:68:40
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let cloneable2 = cloneable.clone();;
[INFO] [stdout]    |                                        ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> benches/stream_cloneable.rs:38:50
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let mut cloneable_rx2 = cloneable_rx.clone();;
[INFO] [stdout]    |                                                  ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/sink_unsync_cloneable.rs:46:24
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn new_stream() -> Box<Stream<Item = usize, Error = SendError<usize>>> {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn new_stream() -> Box<dyn Stream<Item = usize, Error = SendError<usize>>> {
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> benches/stream_cloneable.rs:51:50
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let mut cloneable_rx2 = cloneable_rx.clone();;
[INFO] [stdout]    |                                                  ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> benches/stream_cloneable.rs:52:50
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut cloneable_rx3 = cloneable_rx.clone();;
[INFO] [stdout]    |                                                  ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Future`
[INFO] [stdout]  --> benches/stream_unsync_cloneable.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | use futures::{Future, Stream};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Future`
[INFO] [stdout]  --> benches/stream_cloneable.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | use futures::{Future, Stream};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `Stream` trait object in tuple element 1 that must be used
[INFO] [stdout]   --> tests/sink_cloneable.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     cloneable.send_all(new_stream()).wait().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `Stream` trait object in tuple element 1 that must be used
[INFO] [stdout]   --> tests/sink_cloneable.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     cloneable2.send_all(new_stream()).wait().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `Stream` trait object in tuple element 1 that must be used
[INFO] [stdout]   --> tests/sink_cloneable.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fut1.join(fut2).wait().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `Stream` trait object in tuple element 1 that must be used
[INFO] [stdout]   --> tests/sink_unsync_cloneable.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     cloneable.send_all(new_stream()).wait().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `Stream` trait object in tuple element 1 that must be used
[INFO] [stdout]   --> tests/sink_unsync_cloneable.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     cloneable2.send_all(new_stream()).wait().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `Stream` trait object in tuple element 1 that must be used
[INFO] [stdout]   --> tests/sink_unsync_cloneable.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fut1.join(fut2).wait().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:19:19
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub type AsErr<S: Stream, E> = Then<
[INFO] [stdout]    |                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:21:15
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn(Result<S::Item, ()>) -> Result<S::Item, E>,
[INFO] [stdout]    |               ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:21:39
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn(Result<S::Item, ()>) -> Result<S::Item, E>,
[INFO] [stdout]    |                                       ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Result<S::Item, E>,
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]    |
[INFO] [stdout] 19 - pub type AsErr<S: Stream, E> = Then<
[INFO] [stdout] 19 + pub type AsErr<S, E> = Then<
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]   --> src/stream/unsync_cloneable.rs:33:15
[INFO] [stdout]    |
[INFO] [stdout] 33 | type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/unsync_cloneable.rs:33:56
[INFO] [stdout]    |
[INFO] [stdout] 33 | type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                        ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/unsync_cloneable.rs:33:66
[INFO] [stdout]    |
[INFO] [stdout] 33 | type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                                  ^^^^^^^^
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]    |
[INFO] [stdout] 33 - type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout] 33 + type Queue<S> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]   --> src/stream/cloneable.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 | type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/cloneable.rs:38:54
[INFO] [stdout]    |
[INFO] [stdout] 38 | type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                      ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/cloneable.rs:38:64
[INFO] [stdout]    |
[INFO] [stdout] 38 | type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                                ^^^^^^^^
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]    |
[INFO] [stdout] 38 - type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout] 38 + type Queue<S> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.79s
[INFO] running `Command { std: "docker" "inspect" "48823bfabc59d7419ffae1a59a39c3e5cf482528bdabf92561a136a2fd356936", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48823bfabc59d7419ffae1a59a39c3e5cf482528bdabf92561a136a2fd356936", kill_on_drop: false }`
[INFO] [stdout] 48823bfabc59d7419ffae1a59a39c3e5cf482528bdabf92561a136a2fd356936
[INFO] checking ex-futures-0.4.9 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate ex-futures 0.4.9 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate ex-futures 0.4.9 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ex-futures 0.4.9
[INFO] finished tweaking crates.io crate ex-futures 0.4.9
[INFO] tweaked toml for crates.io crate ex-futures 0.4.9 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 73fc660a00142482cde31a4a7dfc95b05f5c0c8e013dc8bfcb120cda128431ae
[INFO] running `Command { std: "docker" "start" "-a" "73fc660a00142482cde31a4a7dfc95b05f5c0c8e013dc8bfcb120cda128431ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73fc660a00142482cde31a4a7dfc95b05f5c0c8e013dc8bfcb120cda128431ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73fc660a00142482cde31a4a7dfc95b05f5c0c8e013dc8bfcb120cda128431ae", kill_on_drop: false }`
[INFO] [stdout] 73fc660a00142482cde31a4a7dfc95b05f5c0c8e013dc8bfcb120cda128431ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e92d4d27454ab21f4fa216612f1ce53f9ea3176c4ddc9b2d0eaf3d2e29618881
[INFO] running `Command { std: "docker" "start" "-a" "e92d4d27454ab21f4fa216612f1ce53f9ea3176c4ddc9b2d0eaf3d2e29618881", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking scoped-tls v0.1.2
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking crossbeam-deque v0.7.4
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking tokio-sync v0.1.8
[INFO] [stderr]     Checking ex-futures v0.4.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:19:19
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub type AsErr<S: Stream, E> = Then<
[INFO] [stdout]    |                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:21:15
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn(Result<S::Item, ()>) -> Result<S::Item, E>,
[INFO] [stdout]    |               ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:21:39
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn(Result<S::Item, ()>) -> Result<S::Item, E>,
[INFO] [stdout]    |                                       ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Result<S::Item, E>,
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]    |
[INFO] [stdout] 19 - pub type AsErr<S: Stream, E> = Then<
[INFO] [stdout] 19 + pub type AsErr<S, E> = Then<
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]   --> src/stream/unsync_cloneable.rs:33:15
[INFO] [stdout]    |
[INFO] [stdout] 33 | type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/unsync_cloneable.rs:33:56
[INFO] [stdout]    |
[INFO] [stdout] 33 | type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                        ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/unsync_cloneable.rs:33:66
[INFO] [stdout]    |
[INFO] [stdout] 33 | type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                                  ^^^^^^^^
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]    |
[INFO] [stdout] 33 - type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout] 33 + type Queue<S> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]   --> src/stream/cloneable.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 | type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/cloneable.rs:38:54
[INFO] [stdout]    |
[INFO] [stdout] 38 | type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                      ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/cloneable.rs:38:64
[INFO] [stdout]    |
[INFO] [stdout] 38 | type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                                ^^^^^^^^
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]    |
[INFO] [stdout] 38 - type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout] 38 + type Queue<S> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tokio-core v0.1.18
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/sink_cloneable.rs:46:24
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn new_stream() -> Box<Stream<Item = usize, Error = SendError<usize>>> {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn new_stream() -> Box<dyn Stream<Item = usize, Error = SendError<usize>>> {
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `Stream` trait object in tuple element 1 that must be used
[INFO] [stdout]   --> tests/sink_cloneable.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     cloneable.send_all(new_stream()).wait().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `Stream` trait object in tuple element 1 that must be used
[INFO] [stdout]   --> tests/sink_cloneable.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     cloneable2.send_all(new_stream()).wait().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `Stream` trait object in tuple element 1 that must be used
[INFO] [stdout]   --> tests/sink_cloneable.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fut1.join(fut2).wait().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/sink_unsync_cloneable.rs:46:24
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn new_stream() -> Box<Stream<Item = usize, Error = SendError<usize>>> {
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn new_stream() -> Box<dyn Stream<Item = usize, Error = SendError<usize>>> {
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> benches/stream_unsync_cloneable.rs:38:50
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let mut cloneable_rx2 = cloneable_rx.clone();;
[INFO] [stdout]    |                                                  ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> benches/stream_unsync_cloneable.rs:51:50
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let mut cloneable_rx2 = cloneable_rx.clone();;
[INFO] [stdout]    |                                                  ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> benches/stream_unsync_cloneable.rs:52:50
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut cloneable_rx3 = cloneable_rx.clone();;
[INFO] [stdout]    |                                                  ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> benches/stream_cloneable.rs:38:50
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let mut cloneable_rx2 = cloneable_rx.clone();;
[INFO] [stdout]    |                                                  ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> benches/stream_cloneable.rs:51:50
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let mut cloneable_rx2 = cloneable_rx.clone();;
[INFO] [stdout]    |                                                  ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> benches/stream_cloneable.rs:52:50
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut cloneable_rx3 = cloneable_rx.clone();;
[INFO] [stdout]    |                                                  ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> tests/stream_cloneable.rs:68:40
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let cloneable2 = cloneable.clone();;
[INFO] [stdout]    |                                        ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Future`
[INFO] [stdout]  --> benches/stream_unsync_cloneable.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | use futures::{Future, Stream};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> tests/stream_unsync_cloneable.rs:68:40
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let cloneable2 = cloneable.clone();;
[INFO] [stdout]    |                                        ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:19:19
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub type AsErr<S: Stream, E> = Then<
[INFO] [stdout]    |                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:21:15
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn(Result<S::Item, ()>) -> Result<S::Item, E>,
[INFO] [stdout]    |               ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:21:39
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn(Result<S::Item, ()>) -> Result<S::Item, E>,
[INFO] [stdout]    |                                       ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/mod.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Result<S::Item, E>,
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]    |
[INFO] [stdout] 19 - pub type AsErr<S: Stream, E> = Then<
[INFO] [stdout] 19 + pub type AsErr<S, E> = Then<
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]   --> src/stream/unsync_cloneable.rs:33:15
[INFO] [stdout]    |
[INFO] [stdout] 33 | type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/unsync_cloneable.rs:33:56
[INFO] [stdout]    |
[INFO] [stdout] 33 | type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                        ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/unsync_cloneable.rs:33:66
[INFO] [stdout]    |
[INFO] [stdout] 33 | type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                                  ^^^^^^^^
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]    |
[INFO] [stdout] 33 - type Queue<S: Stream> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout] 33 + type Queue<S> = RefCell<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Future`
[INFO] [stdout]  --> benches/stream_cloneable.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | use futures::{Future, Stream};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stdout]   --> src/stream/cloneable.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 | type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/cloneable.rs:38:54
[INFO] [stdout]    |
[INFO] [stdout] 38 | type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                      ^^^^^^^
[INFO] [stdout] help: use fully disambiguated paths (i.e., `<T as Trait>::Assoc`) to refer to associated types in type aliases
[INFO] [stdout]   --> src/stream/cloneable.rs:38:64
[INFO] [stdout]    |
[INFO] [stdout] 38 | type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |                                                                ^^^^^^^^
[INFO] [stdout] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stdout]    |
[INFO] [stdout] 38 - type Queue<S: Stream> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout] 38 + type Queue<S> = Mutex<VecDeque<Result<Option<S::Item>, S::Error>>>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `Stream` trait object in tuple element 1 that must be used
[INFO] [stdout]   --> tests/sink_unsync_cloneable.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     cloneable.send_all(new_stream()).wait().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `Stream` trait object in tuple element 1 that must be used
[INFO] [stdout]   --> tests/sink_unsync_cloneable.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     cloneable2.send_all(new_stream()).wait().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused boxed `Stream` trait object in tuple element 1 that must be used
[INFO] [stdout]   --> tests/sink_unsync_cloneable.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fut1.join(fut2).wait().unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: streams do nothing unless polled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.15s
[INFO] running `Command { std: "docker" "inspect" "e92d4d27454ab21f4fa216612f1ce53f9ea3176c4ddc9b2d0eaf3d2e29618881", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e92d4d27454ab21f4fa216612f1ce53f9ea3176c4ddc9b2d0eaf3d2e29618881", kill_on_drop: false }`
[INFO] [stdout] e92d4d27454ab21f4fa216612f1ce53f9ea3176c4ddc9b2d0eaf3d2e29618881