[INFO] cloning repository https://github.com/46bit/comms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/46bit/comms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F46bit%2Fcomms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F46bit%2Fcomms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d96ab1c55c57c5ae6d84e9064756cabe32135c4
[INFO] checking 46bit/comms against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F46bit%2Fcomms" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/46bit/comms 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 git repo https://github.com/46bit/comms
[INFO] finished tweaking git repo https://github.com/46bit/comms
[INFO] tweaked toml for git repo https://github.com/46bit/comms written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/46bit/comms already has a lockfile, it will not be regenerated
[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] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded log v0.3.7
[INFO] [stderr]   Downloaded tokio-timer v0.1.1
[INFO] [stderr]   Downloaded matches v0.1.4
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[INFO] [stderr]   Downloaded quine-mc_cluskey v0.2.4
[INFO] [stderr]   Downloaded clippy_lints v0.0.121
[INFO] [stderr]   Downloaded serde_codegen_internals v0.14.2
[INFO] [stderr]   Downloaded unicode-normalization v0.1.4
[INFO] [stderr]   Downloaded syn v0.11.10
[INFO] [stderr]   Downloaded serde_derive v0.9.13
[INFO] [stderr]   Downloaded dtoa v0.4.1
[INFO] [stderr]   Downloaded num-traits v0.1.37
[INFO] [stderr]   Downloaded serde v0.9.13
[INFO] [stderr]   Downloaded serde_json v0.9.9
[INFO] [stderr]   Downloaded regex-syntax v0.4.0
[INFO] [stderr]   Downloaded semver v0.6.0
[INFO] [stderr]   Downloaded rustc-serialize v0.3.23
[INFO] [stderr]   Downloaded clippy v0.0.121
[INFO] [stderr]   Downloaded libc v0.2.21
[INFO] [stderr]   Downloaded rand v0.3.15
[INFO] [stderr]   Downloaded futures v0.1.13
[INFO] [stderr]   Downloaded itoa v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 6beb19d7a8b9d2366c4d003500a7a60c91fa3db63e499c5b558cef818d38bde4
[INFO] running `Command { std: "docker" "start" "-a" "6beb19d7a8b9d2366c4d003500a7a60c91fa3db63e499c5b558cef818d38bde4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6beb19d7a8b9d2366c4d003500a7a60c91fa3db63e499c5b558cef818d38bde4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6beb19d7a8b9d2366c4d003500a7a60c91fa3db63e499c5b558cef818d38bde4", kill_on_drop: false }`
[INFO] [stdout] 6beb19d7a8b9d2366c4d003500a7a60c91fa3db63e499c5b558cef818d38bde4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] bc79cc66602f6a6bffc3990151731982eb9acf82c3a9455bb137faece7d7e184
[INFO] running `Command { std: "docker" "start" "-a" "bc79cc66602f6a6bffc3990151731982eb9acf82c3a9455bb137faece7d7e184", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]     Checking log v0.3.7
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking futures v0.1.13
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking tokio-timer v0.1.1
[INFO] [stderr]     Checking comms v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Future` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:37
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Future` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:37
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:43
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hash` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Hash` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:37
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsyncSink` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:50
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                                  ^^^^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `AsyncSink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hash` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Hash` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashSet` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `HashSet` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:37
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:43
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsyncSink` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:50
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                                  ^^^^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `AsyncSink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hash` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Hash` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashSet` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::{HashSet, HashMap};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `HashSet` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashMap` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::{HashSet, HashMap};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `HashMap` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:37
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:43
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::transmit::*`
[INFO] [stdout]  --> src/room/mod.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use self::transmit::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client/mod.rs:126:39
[INFO] [stdout]     |
[INFO] [stdout] 126 |     pub fn update_status(self) -> Box<Future<Item = (Option<C::Item>, Self), Error = Self>> {
[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] 126 |     pub fn update_status(self) -> Box<dyn Future<Item = (Option<C::Item>, Self), Error = Self>> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 32 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking quickcheck v0.2.27
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Future` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:37
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]    --> src/client/receive.rs:207:41
[INFO] [stdout]     |
[INFO] [stdout] 205 |     use super::*;
[INFO] [stdout]     |         -------- the item `Future` is already imported here
[INFO] [stdout] 206 |     use super::test::*;
[INFO] [stdout] 207 |     use futures::{lazy, future, stream, Future};
[INFO] [stdout]     |                                         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `drop` is imported redundantly
[INFO] [stdout]    --> src/client/receive.rs:208:9
[INFO] [stdout]     |
[INFO] [stdout] 208 |     use std::mem::drop;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `drop` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Future` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:37
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:43
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]    --> src/client/mod.rs:329:35
[INFO] [stdout]     |
[INFO] [stdout] 327 |     use super::*;
[INFO] [stdout]     |         -------- the item `Future` is already imported here
[INFO] [stdout] 328 |     use super::test::*;
[INFO] [stdout] 329 |     use futures::{lazy, executor, Future, Stream};
[INFO] [stdout]     |                                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]    --> src/client/mod.rs:329:43
[INFO] [stdout]     |
[INFO] [stdout] 327 |     use super::*;
[INFO] [stdout]     |         -------- the item `Stream` is already imported here
[INFO] [stdout] 328 |     use super::test::*;
[INFO] [stdout] 329 |     use futures::{lazy, executor, Future, Stream};
[INFO] [stdout]     |                                           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hash` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Hash` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:37
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsyncSink` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:50
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                                  ^^^^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `AsyncSink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hash` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Hash` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashSet` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `HashSet` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:37
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:43
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsyncSink` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:50
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                                  ^^^^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `AsyncSink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hash` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Hash` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashSet` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::{HashSet, HashMap};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `HashSet` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashMap` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::{HashSet, HashMap};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `HashMap` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:37
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:43
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::transmit::*`
[INFO] [stdout]  --> src/room/mod.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use self::transmit::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]    --> src/room/mod.rs:256:37
[INFO] [stdout]     |
[INFO] [stdout] 254 |     use super::*;
[INFO] [stdout]     |         -------- the item `Stream` is already imported here
[INFO] [stdout] 255 |     use super::test::*;
[INFO] [stdout] 256 |     use futures::{executor, Future, Stream};
[INFO] [stdout]     |                                     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client/mod.rs:126:39
[INFO] [stdout]     |
[INFO] [stdout] 126 |     pub fn update_status(self) -> Box<Future<Item = (Option<C::Item>, Self), Error = Self>> {
[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] 126 |     pub fn update_status(self) -> Box<dyn Future<Item = (Option<C::Item>, Self), Error = Self>> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:56:33
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn unpark_noop() -> Arc<executor::Unpark> {
[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] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn unpark_noop() -> Arc<dyn executor::Unpark> {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/client/mod.rs:336:53
[INFO] [stdout]     |
[INFO] [stdout] 336 |         let (_, _, client0) = mock_client(client0_id.clone(), 1);
[INFO] [stdout]     |                                                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/client/mod.rs:338:53
[INFO] [stdout]     |
[INFO] [stdout] 338 |         let (_, _, client1) = mock_client(client1_id.clone(), 1);
[INFO] [stdout]     |                                                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 39 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.22s
[INFO] running `Command { std: "docker" "inspect" "bc79cc66602f6a6bffc3990151731982eb9acf82c3a9455bb137faece7d7e184", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc79cc66602f6a6bffc3990151731982eb9acf82c3a9455bb137faece7d7e184", kill_on_drop: false }`
[INFO] [stdout] bc79cc66602f6a6bffc3990151731982eb9acf82c3a9455bb137faece7d7e184
[INFO] checking 46bit/comms against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F46bit%2Fcomms" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/46bit/comms 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 git repo https://github.com/46bit/comms
[INFO] finished tweaking git repo https://github.com/46bit/comms
[INFO] tweaked toml for git repo https://github.com/46bit/comms written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/46bit/comms already has a lockfile, it will not be regenerated
[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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 87d10fc239beea889ffcd465f5f4e99656c96455fcaf6f76676a4ef05a138674
[INFO] running `Command { std: "docker" "start" "-a" "87d10fc239beea889ffcd465f5f4e99656c96455fcaf6f76676a4ef05a138674", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87d10fc239beea889ffcd465f5f4e99656c96455fcaf6f76676a4ef05a138674", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87d10fc239beea889ffcd465f5f4e99656c96455fcaf6f76676a4ef05a138674", kill_on_drop: false }`
[INFO] [stdout] 87d10fc239beea889ffcd465f5f4e99656c96455fcaf6f76676a4ef05a138674
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 2924d9269ff4e49b8fa75794b9c7c413971c04cb8c6e28a989e15acb55e7acc0
[INFO] running `Command { std: "docker" "start" "-a" "2924d9269ff4e49b8fa75794b9c7c413971c04cb8c6e28a989e15acb55e7acc0", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]     Checking futures v0.1.13
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking log v0.3.7
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking tokio-timer v0.1.1
[INFO] [stderr]     Checking comms v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Future` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:37
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Future` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:37
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:43
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hash` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Hash` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:37
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsyncSink` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:50
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                                  ^^^^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `AsyncSink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hash` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Hash` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashSet` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `HashSet` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:37
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:43
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsyncSink` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:50
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                                  ^^^^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `AsyncSink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hash` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Hash` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashSet` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::{HashSet, HashMap};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `HashSet` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashMap` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::{HashSet, HashMap};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `HashMap` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:37
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:43
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::transmit::*`
[INFO] [stdout]  --> src/room/mod.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use self::transmit::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client/mod.rs:126:39
[INFO] [stdout]     |
[INFO] [stdout] 126 |     pub fn update_status(self) -> Box<Future<Item = (Option<C::Item>, Self), Error = Self>> {
[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] 126 |     pub fn update_status(self) -> Box<dyn Future<Item = (Option<C::Item>, Self), Error = Self>> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 32 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking quickcheck v0.2.27
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Future` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/client/receive.rs:2:37
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]    --> src/client/receive.rs:207:41
[INFO] [stdout]     |
[INFO] [stdout] 205 |     use super::*;
[INFO] [stdout]     |         -------- the item `Future` is already imported here
[INFO] [stdout] 206 |     use super::test::*;
[INFO] [stdout] 207 |     use futures::{lazy, future, stream, Future};
[INFO] [stdout]     |                                         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `drop` is imported redundantly
[INFO] [stdout]    --> src/client/receive.rs:208:9
[INFO] [stdout]     |
[INFO] [stdout] 208 |     use std::mem::drop;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]    --> /rustc/645bb72776a6a56a1a8f52631a44bd082b2ba509/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]     |
[INFO] [stdout]     = note: the item `drop` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Future` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:37
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/client/transmit.rs:1:43
[INFO] [stdout]   |
[INFO] [stdout] 1 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 2 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]    --> src/client/mod.rs:329:35
[INFO] [stdout]     |
[INFO] [stdout] 327 |     use super::*;
[INFO] [stdout]     |         -------- the item `Future` is already imported here
[INFO] [stdout] 328 |     use super::test::*;
[INFO] [stdout] 329 |     use futures::{lazy, executor, Future, Stream};
[INFO] [stdout]     |                                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]    --> src/client/mod.rs:329:43
[INFO] [stdout]     |
[INFO] [stdout] 327 |     use super::*;
[INFO] [stdout]     |         -------- the item `Stream` is already imported here
[INFO] [stdout] 328 |     use super::test::*;
[INFO] [stdout] 329 |     use futures::{lazy, executor, Future, Stream};
[INFO] [stdout]     |                                           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hash` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Hash` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:37
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:43
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsyncSink` is imported redundantly
[INFO] [stdout]  --> src/room/transmit.rs:2:50
[INFO] [stdout]   |
[INFO] [stdout] 2 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                                  ^^^^^^^^^
[INFO] [stdout] 3 | use super::*;
[INFO] [stdout]   |     -------- the item `AsyncSink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hash` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Hash` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashSet` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `HashSet` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:37
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:43
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsyncSink` is imported redundantly
[INFO] [stdout]  --> src/room/broadcast.rs:3:50
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async, AsyncSink};
[INFO] [stdout]   |                                                  ^^^^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `AsyncSink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Hash` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Hash` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashSet` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::{HashSet, HashMap};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `HashSet` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashMap` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::{HashSet, HashMap};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `HashMap` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sink` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                       ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Sink` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Stream` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:37
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                     ^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Poll` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]  --> src/room/receive.rs:3:43
[INFO] [stdout]   |
[INFO] [stdout] 3 | use futures::{Future, Sink, Stream, Poll, Async};
[INFO] [stdout]   |                                           ^^^^^
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Async` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::transmit::*`
[INFO] [stdout]  --> src/room/mod.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use self::transmit::*;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Stream` is imported redundantly
[INFO] [stdout]    --> src/room/mod.rs:256:37
[INFO] [stdout]     |
[INFO] [stdout] 254 |     use super::*;
[INFO] [stdout]     |         -------- the item `Stream` is already imported here
[INFO] [stdout] 255 |     use super::test::*;
[INFO] [stdout] 256 |     use futures::{executor, Future, Stream};
[INFO] [stdout]     |                                     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/client/mod.rs:126:39
[INFO] [stdout]     |
[INFO] [stdout] 126 |     pub fn update_status(self) -> Box<Future<Item = (Option<C::Item>, Self), Error = Self>> {
[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] 126 |     pub fn update_status(self) -> Box<dyn Future<Item = (Option<C::Item>, Self), Error = Self>> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:56:33
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn unpark_noop() -> Arc<executor::Unpark> {
[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] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn unpark_noop() -> Arc<dyn executor::Unpark> {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/client/mod.rs:336:53
[INFO] [stdout]     |
[INFO] [stdout] 336 |         let (_, _, client0) = mock_client(client0_id.clone(), 1);
[INFO] [stdout]     |                                                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/client/mod.rs:338:53
[INFO] [stdout]     |
[INFO] [stdout] 338 |         let (_, _, client1) = mock_client(client1_id.clone(), 1);
[INFO] [stdout]     |                                                     ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 39 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.06s
[INFO] running `Command { std: "docker" "inspect" "2924d9269ff4e49b8fa75794b9c7c413971c04cb8c6e28a989e15acb55e7acc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2924d9269ff4e49b8fa75794b9c7c413971c04cb8c6e28a989e15acb55e7acc0", kill_on_drop: false }`
[INFO] [stdout] 2924d9269ff4e49b8fa75794b9c7c413971c04cb8c6e28a989e15acb55e7acc0