[INFO] cloning repository https://github.com/mas-yo/ragtime-old
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mas-yo/ragtime-old" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmas-yo%2Fragtime-old", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmas-yo%2Fragtime-old'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f30656bb8dfb8c8f7015abd8aa5462a09a907b70
[INFO] checking mas-yo/ragtime-old against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmas-yo%2Fragtime-old" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mas-yo/ragtime-old 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/mas-yo/ragtime-old
[INFO] finished tweaking git repo https://github.com/mas-yo/ragtime-old
[INFO] tweaked toml for git repo https://github.com/mas-yo/ragtime-old written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mas-yo/ragtime-old 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 }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 3444ac4855a9c976eb183686547c47fb4f5922dc8342482674654dcc87bdd467
[INFO] running `Command { std: "docker" "start" "-a" "3444ac4855a9c976eb183686547c47fb4f5922dc8342482674654dcc87bdd467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3444ac4855a9c976eb183686547c47fb4f5922dc8342482674654dcc87bdd467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3444ac4855a9c976eb183686547c47fb4f5922dc8342482674654dcc87bdd467", kill_on_drop: false }`
[INFO] [stdout] 3444ac4855a9c976eb183686547c47fb4f5922dc8342482674654dcc87bdd467
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 19364094e821ecec1ebf1617efbd548726f90420f29f214aea7dcc3a036f7741
[INFO] running `Command { std: "docker" "start" "-a" "19364094e821ecec1ebf1617efbd548726f90420f29f214aea7dcc3a036f7741", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking lazy_static v0.2.8
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]     Checking tinyvec_macros v0.1.1
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking log v0.3.7
[INFO] [stderr]     Checking byteorder v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking sha1 v0.2.0
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]     Checking unicode-normalization v0.1.23
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking bytes v0.4.8
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking ws v0.7.3
[INFO] [stderr]     Checking ragtime v0.1.0 (/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: unused import: `VecDeque`
[INFO] [stdout]  --> src/network.rs:5:33
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::{HashMap, VecDeque};
[INFO] [stdout]   |                                 ^^^^^^^^
[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 imports: `Receiver`, `Sender`, `channel`
[INFO] [stdout]  --> src/network.rs:6:23
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::mpsc::{Sender, Receiver, channel};
[INFO] [stdout]   |                       ^^^^^^  ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `VecDeque`
[INFO] [stdout]  --> src/network.rs:5:33
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::{HashMap, VecDeque};
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Rc`, `Weak`
[INFO] [stdout]  --> src/network.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::rc::{Weak, Rc};
[INFO] [stdout]   |               ^^^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/network.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Receiver`, `Sender`, `channel`
[INFO] [stdout]  --> src/network.rs:6:23
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::mpsc::{Sender, Receiver, channel};
[INFO] [stdout]   |                       ^^^^^^  ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/network.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::ToSocketAddrs`
[INFO] [stdout]   --> src/network.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::net::ToSocketAddrs;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Rc`, `Weak`
[INFO] [stdout]  --> src/network.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::rc::{Weak, Rc};
[INFO] [stdout]   |               ^^^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::SocketAddr`
[INFO] [stdout]   --> src/network.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::net::SocketAddr;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/network.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]   --> src/network.rs:12:22
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::io::{Write, Read, BufReader, BufRead};
[INFO] [stdout]    |                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/network.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BigEndian`, `ByteOrder`
[INFO] [stdout]   --> src/network.rs:15:23
[INFO] [stdout]    |
[INFO] [stdout] 15 | use self::byteorder::{BigEndian, ByteOrder};
[INFO] [stdout]    |                       ^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::ToSocketAddrs`
[INFO] [stdout]   --> src/network.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::net::ToSocketAddrs;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::SocketAddr`
[INFO] [stdout]   --> src/network.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::net::SocketAddr;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader`, `Read`, `Write`
[INFO] [stdout]  --> src/string_message.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{Write, Read, BufReader, BufRead};
[INFO] [stdout]   |               ^^^^^  ^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::PartialEq`
[INFO] [stdout]  --> src/room.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::PartialEq;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]   --> src/network.rs:12:22
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::io::{Write, Read, BufReader, BufRead};
[INFO] [stdout]    |                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/room.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BigEndian`, `ByteOrder`
[INFO] [stdout]   --> src/network.rs:15:23
[INFO] [stdout]    |
[INFO] [stdout] 15 | use self::byteorder::{BigEndian, ByteOrder};
[INFO] [stdout]    |                       ^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Receiver`
[INFO] [stdout]  --> src/room.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::mpsc::{Sender,Receiver};
[INFO] [stdout]   |                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader`, `Read`, `Write`
[INFO] [stdout]  --> src/string_message.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{Write, Read, BufReader, BufRead};
[INFO] [stdout]   |               ^^^^^  ^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::PartialEq`
[INFO] [stdout]  --> src/room.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::PartialEq;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/room.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Receiver`
[INFO] [stdout]  --> src/room.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::mpsc::{Sender,Receiver};
[INFO] [stdout]   |                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/network.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/network.rs:82:21
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 let mut conn = Connection::new(self.next_conn_id, stream);
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/network.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/network.rs:82:21
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 let mut conn = Connection::new(self.next_conn_id, stream);
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/network.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Connection<T: Serialize+Debug> {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 25 |     id: ConnectionID,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/network.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Connection<T: Serialize+Debug> {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 25 |     id: ConnectionID,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/network.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |         self.send_stream.write_all(data);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let _ = self.send_stream.write_all(data);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/network.rs:81:17
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 stream.set_nonblocking(true);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 let _ = stream.set_nonblocking(true);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/string_message.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         reader.read_line(&mut self.body);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let _ = reader.read_line(&mut self.body);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/network.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |         self.send_stream.write_all(data);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let _ = self.send_stream.write_all(data);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/network.rs:81:17
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 stream.set_nonblocking(true);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 let _ = stream.set_nonblocking(true);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/string_message.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         reader.read_line(&mut self.body);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let _ = reader.read_line(&mut self.body);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ragtime-sample1 v0.1.0 (/opt/rustwide/workdir/ragtime_sample1)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> ragtime_sample1/src/main.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 variable: `id`
[INFO] [stdout]   --> ragtime_sample1/src/game/mod.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn new(id:room::RoomID) -> Sample1Room {
[INFO] [stdout]    |            ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `commands`
[INFO] [stdout]   --> ragtime_sample1/src/game/mod.rs:18:26
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn update(&mut self, commands:Vec<String>) {
[INFO] [stdout]    |                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_commands`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shake`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:48:27
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn on_open(&mut self, shake: ws::Handshake) -> ws::Result<()> {
[INFO] [stdout]    |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_shake`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:63:28
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn on_close(&mut self, code: ws::CloseCode, reason: &str) {
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reason`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:63:49
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn on_close(&mut self, code: ws::CloseCode, reason: &str) {
[INFO] [stdout]    |                                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:66:28
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn on_error(&mut self, err: ws::Error) {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `room_tx`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let room_tx = room::start_thread::<game::Sample1Room>();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_room_tx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<M> Handler<M> where M:Send+FromStr+'static {
[INFO] [stdout]    | ----------------------------------------------- associated function in this implementation
[INFO] [stdout] 22 |     fn new(tx:mpsc::Sender<M>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `PlayerID` is never used
[INFO] [stdout]  --> ragtime_sample1/src/game/mod.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type PlayerID = u64;
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:57:17
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 self.tx.send(msg);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 let _ = self.tx.send(msg);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> ragtime_sample1/src/main.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: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> ragtime_sample1/src/game/mod.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn new(id:room::RoomID) -> Sample1Room {
[INFO] [stdout]    |            ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `commands`
[INFO] [stdout]   --> ragtime_sample1/src/game/mod.rs:18:26
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn update(&mut self, commands:Vec<String>) {
[INFO] [stdout]    |                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_commands`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shake`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:48:27
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn on_open(&mut self, shake: ws::Handshake) -> ws::Result<()> {
[INFO] [stdout]    |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_shake`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:63:28
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn on_close(&mut self, code: ws::CloseCode, reason: &str) {
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reason`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:63:49
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn on_close(&mut self, code: ws::CloseCode, reason: &str) {
[INFO] [stdout]    |                                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:66:28
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn on_error(&mut self, err: ws::Error) {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `room_tx`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let room_tx = room::start_thread::<game::Sample1Room>();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_room_tx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<M> Handler<M> where M:Send+FromStr+'static {
[INFO] [stdout]    | ----------------------------------------------- associated function in this implementation
[INFO] [stdout] 22 |     fn new(tx:mpsc::Sender<M>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `PlayerID` is never used
[INFO] [stdout]  --> ragtime_sample1/src/game/mod.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type PlayerID = u64;
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:57:17
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 self.tx.send(msg);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 let _ = self.tx.send(msg);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.10s
[INFO] running `Command { std: "docker" "inspect" "19364094e821ecec1ebf1617efbd548726f90420f29f214aea7dcc3a036f7741", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19364094e821ecec1ebf1617efbd548726f90420f29f214aea7dcc3a036f7741", kill_on_drop: false }`
[INFO] [stdout] 19364094e821ecec1ebf1617efbd548726f90420f29f214aea7dcc3a036f7741
[INFO] checking mas-yo/ragtime-old against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmas-yo%2Fragtime-old" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mas-yo/ragtime-old 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/mas-yo/ragtime-old
[INFO] finished tweaking git repo https://github.com/mas-yo/ragtime-old
[INFO] tweaked toml for git repo https://github.com/mas-yo/ragtime-old written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/mas-yo/ragtime-old 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] [stderr]     Updating crates.io index
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 17d690c0b775b184fb4c4d3fed0646a35e18d85570820d28394db07003b8fb16
[INFO] running `Command { std: "docker" "start" "-a" "17d690c0b775b184fb4c4d3fed0646a35e18d85570820d28394db07003b8fb16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17d690c0b775b184fb4c4d3fed0646a35e18d85570820d28394db07003b8fb16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17d690c0b775b184fb4c4d3fed0646a35e18d85570820d28394db07003b8fb16", kill_on_drop: false }`
[INFO] [stdout] 17d690c0b775b184fb4c4d3fed0646a35e18d85570820d28394db07003b8fb16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] d9bedc6ef63a45fe3ca8a61689c68cbccb38095d7afc0b364c7124c0016b19e3
[INFO] running `Command { std: "docker" "start" "-a" "d9bedc6ef63a45fe3ca8a61689c68cbccb38095d7afc0b364c7124c0016b19e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]     Checking lazy_static v0.2.8
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking byteorder v1.0.0
[INFO] [stderr]     Checking log v0.3.7
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking sha1 v0.2.0
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]     Checking unicode-normalization v0.1.23
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]     Checking bytes v0.4.8
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking ws v0.7.3
[INFO] [stderr]     Checking ragtime v0.1.0 (/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: unused import: `VecDeque`
[INFO] [stdout]  --> src/network.rs:5:33
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::{HashMap, VecDeque};
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Receiver`, `Sender`, `channel`
[INFO] [stdout]  --> src/network.rs:6:23
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::mpsc::{Sender, Receiver, channel};
[INFO] [stdout]   |                       ^^^^^^  ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Rc`, `Weak`
[INFO] [stdout]  --> src/network.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::rc::{Weak, Rc};
[INFO] [stdout]   |               ^^^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/network.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/network.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::ToSocketAddrs`
[INFO] [stdout]   --> src/network.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::net::ToSocketAddrs;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::SocketAddr`
[INFO] [stdout]   --> src/network.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::net::SocketAddr;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]   --> src/network.rs:12:22
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::io::{Write, Read, BufReader, BufRead};
[INFO] [stdout]    |                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BigEndian`, `ByteOrder`
[INFO] [stdout]   --> src/network.rs:15:23
[INFO] [stdout]    |
[INFO] [stdout] 15 | use self::byteorder::{BigEndian, ByteOrder};
[INFO] [stdout]    |                       ^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader`, `Read`, `Write`
[INFO] [stdout]  --> src/string_message.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{Write, Read, BufReader, BufRead};
[INFO] [stdout]   |               ^^^^^  ^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::PartialEq`
[INFO] [stdout]  --> src/room.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::PartialEq;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/room.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Receiver`
[INFO] [stdout]  --> src/room.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::mpsc::{Sender,Receiver};
[INFO] [stdout]   |                              ^^^^^^^^
[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: `VecDeque`
[INFO] [stdout]  --> src/network.rs:5:33
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::{HashMap, VecDeque};
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Receiver`, `Sender`, `channel`
[INFO] [stdout]  --> src/network.rs:6:23
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::mpsc::{Sender, Receiver, channel};
[INFO] [stdout]   |                       ^^^^^^  ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Rc`, `Weak`
[INFO] [stdout]  --> src/network.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::rc::{Weak, Rc};
[INFO] [stdout]   |               ^^^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/network.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/network.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::ToSocketAddrs`
[INFO] [stdout]   --> src/network.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::net::ToSocketAddrs;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::SocketAddr`
[INFO] [stdout]   --> src/network.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::net::SocketAddr;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]   --> src/network.rs:12:22
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::io::{Write, Read, BufReader, BufRead};
[INFO] [stdout]    |                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BigEndian`, `ByteOrder`
[INFO] [stdout]   --> src/network.rs:15:23
[INFO] [stdout]    |
[INFO] [stdout] 15 | use self::byteorder::{BigEndian, ByteOrder};
[INFO] [stdout]    |                       ^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader`, `Read`, `Write`
[INFO] [stdout]  --> src/string_message.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{Write, Read, BufReader, BufRead};
[INFO] [stdout]   |               ^^^^^  ^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::PartialEq`
[INFO] [stdout]  --> src/room.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::PartialEq;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/room.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Receiver`
[INFO] [stdout]  --> src/room.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::mpsc::{Sender,Receiver};
[INFO] [stdout]   |                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/network.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/network.rs:82:21
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 let mut conn = Connection::new(self.next_conn_id, stream);
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/network.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Connection<T: Serialize+Debug> {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 25 |     id: ConnectionID,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/network.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |         self.send_stream.write_all(data);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let _ = self.send_stream.write_all(data);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/network.rs:81:17
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 stream.set_nonblocking(true);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 let _ = stream.set_nonblocking(true);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/string_message.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         reader.read_line(&mut self.body);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let _ = reader.read_line(&mut self.body);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/network.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/network.rs:82:21
[INFO] [stdout]    |
[INFO] [stdout] 82 |                 let mut conn = Connection::new(self.next_conn_id, stream);
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/network.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Connection<T: Serialize+Debug> {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 25 |     id: ConnectionID,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/network.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |         self.send_stream.write_all(data);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let _ = self.send_stream.write_all(data);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/network.rs:81:17
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 stream.set_nonblocking(true);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 let _ = stream.set_nonblocking(true);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/string_message.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         reader.read_line(&mut self.body);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let _ = reader.read_line(&mut self.body);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ragtime-sample1 v0.1.0 (/opt/rustwide/workdir/ragtime_sample1)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> ragtime_sample1/src/main.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 `#[macro_use]` import
[INFO] [stdout]  --> ragtime_sample1/src/main.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 variable: `id`
[INFO] [stdout]   --> ragtime_sample1/src/game/mod.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn new(id:room::RoomID) -> Sample1Room {
[INFO] [stdout]    |            ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `commands`
[INFO] [stdout]   --> ragtime_sample1/src/game/mod.rs:18:26
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn update(&mut self, commands:Vec<String>) {
[INFO] [stdout]    |                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_commands`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shake`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:48:27
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn on_open(&mut self, shake: ws::Handshake) -> ws::Result<()> {
[INFO] [stdout]    |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_shake`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:63:28
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn on_close(&mut self, code: ws::CloseCode, reason: &str) {
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reason`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:63:49
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn on_close(&mut self, code: ws::CloseCode, reason: &str) {
[INFO] [stdout]    |                                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:66:28
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn on_error(&mut self, err: ws::Error) {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> ragtime_sample1/src/game/mod.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn new(id:room::RoomID) -> Sample1Room {
[INFO] [stdout]    |            ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `commands`
[INFO] [stdout]   --> ragtime_sample1/src/game/mod.rs:18:26
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn update(&mut self, commands:Vec<String>) {
[INFO] [stdout]    |                          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_commands`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shake`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:48:27
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn on_open(&mut self, shake: ws::Handshake) -> ws::Result<()> {
[INFO] [stdout]    |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_shake`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:63:28
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn on_close(&mut self, code: ws::CloseCode, reason: &str) {
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reason`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:63:49
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn on_close(&mut self, code: ws::CloseCode, reason: &str) {
[INFO] [stdout]    |                                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reason`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:66:28
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn on_error(&mut self, err: ws::Error) {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `room_tx`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let room_tx = room::start_thread::<game::Sample1Room>();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_room_tx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<M> Handler<M> where M:Send+FromStr+'static {
[INFO] [stdout]    | ----------------------------------------------- associated function in this implementation
[INFO] [stdout] 22 |     fn new(tx:mpsc::Sender<M>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `PlayerID` is never used
[INFO] [stdout]  --> ragtime_sample1/src/game/mod.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type PlayerID = u64;
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `room_tx`
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let room_tx = room::start_thread::<game::Sample1Room>();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_room_tx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<M> Handler<M> where M:Send+FromStr+'static {
[INFO] [stdout]    | ----------------------------------------------- associated function in this implementation
[INFO] [stdout] 22 |     fn new(tx:mpsc::Sender<M>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `PlayerID` is never used
[INFO] [stdout]  --> ragtime_sample1/src/game/mod.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type PlayerID = u64;
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:57:17
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 self.tx.send(msg);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 let _ = self.tx.send(msg);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> ragtime_sample1/src/main.rs:57:17
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 self.tx.send(msg);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 let _ = self.tx.send(msg);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.77s
[INFO] running `Command { std: "docker" "inspect" "d9bedc6ef63a45fe3ca8a61689c68cbccb38095d7afc0b364c7124c0016b19e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9bedc6ef63a45fe3ca8a61689c68cbccb38095d7afc0b364c7124c0016b19e3", kill_on_drop: false }`
[INFO] [stdout] d9bedc6ef63a45fe3ca8a61689c68cbccb38095d7afc0b364c7124c0016b19e3