[INFO] cloning repository https://github.com/dragman/chat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dragman/chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdragman%2Fchat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdragman%2Fchat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8d1f01b6f7dee43cb4875270829a25f54cede6cb
[INFO] testing dragman/chat against 1.75.0 for beta-1.76-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdragman%2Fchat" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dragman/chat on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dragman/chat
[INFO] finished tweaking git repo https://github.com/dragman/chat
[INFO] tweaked toml for git repo https://github.com/dragman/chat written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/dragman/chat 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f02e02bfd984bad33e48813e50838d47ff2cfc30ac5ecb796520b5caf0b911ac
[INFO] running `Command { std: "docker" "start" "-a" "f02e02bfd984bad33e48813e50838d47ff2cfc30ac5ecb796520b5caf0b911ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f02e02bfd984bad33e48813e50838d47ff2cfc30ac5ecb796520b5caf0b911ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f02e02bfd984bad33e48813e50838d47ff2cfc30ac5ecb796520b5caf0b911ac", kill_on_drop: false }`
[INFO] [stdout] f02e02bfd984bad33e48813e50838d47ff2cfc30ac5ecb796520b5caf0b911ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f56be94d55f3d4eef90d48163471687eb1b342045cf72db899ab4d299a519197
[INFO] running `Command { std: "docker" "start" "-a" "f56be94d55f3d4eef90d48163471687eb1b342045cf72db899ab4d299a519197", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.40
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]    Compiling byteorder v1.2.1
[INFO] [stderr]    Compiling slab v0.4.0
[INFO] [stderr]    Compiling lazycell v0.6.0
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling sha1 v0.1.1
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling http-muncher v0.3.1
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/frame.rs:90:19
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let buf = try!(input.read_u16::<BigEndian>());
[INFO] [stdout]    |                   ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/frame.rs:93:19
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let len = try!(Self::read_length(header.payload_length, input));
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/frame.rs:95:24
[INFO] [stdout]    |
[INFO] [stdout] 95 |             let mask = try!(Self::read_mask(input));
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:101:27
[INFO] [stdout]     |
[INFO] [stdout] 101 |         let mut payload = try!(Self::read_payload(len, input));
[INFO] [stdout]     |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:116:9
[INFO] [stdout]     |
[INFO] [stdout] 116 |         try!(output.write_u16::<BigEndian>(hdr));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 |         try!(output.write(&self.payload));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:125:17
[INFO] [stdout]     |
[INFO] [stdout] 125 |                 try!(output.write_u16::<BigEndian>(self.payload.len() as u16))
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:132:17
[INFO] [stdout]     |
[INFO] [stdout] 132 |                 try!(output.write_u64::<BigEndian>(self.payload.len() as u64))
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:214:9
[INFO] [stdout]     |
[INFO] [stdout] 214 |         try!(input.read(&mut buf));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:221:9
[INFO] [stdout]     |
[INFO] [stdout] 221 |         try!(input.read(&mut payload));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:298:33
[INFO] [stdout]     |
[INFO] [stdout] 298 | ...                   let mut client = self.clients.get_mut(&token).unwrap();
[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 `mask` is never read
[INFO] [stdout]   --> src/frame.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub struct WebSocketFrame {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 73 |     header: WebSocketFrameHeader,
[INFO] [stdout] 74 |     mask: Option<[u8; 4]>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `WebSocketFrame` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.99s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "f56be94d55f3d4eef90d48163471687eb1b342045cf72db899ab4d299a519197", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f56be94d55f3d4eef90d48163471687eb1b342045cf72db899ab4d299a519197", kill_on_drop: false }`
[INFO] [stdout] f56be94d55f3d4eef90d48163471687eb1b342045cf72db899ab4d299a519197
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6841616e8b5675f606d14af3b00c0196de12327dbee93e79f1b2ee8dcd995c5
[INFO] running `Command { std: "docker" "start" "-a" "c6841616e8b5675f606d14af3b00c0196de12327dbee93e79f1b2ee8dcd995c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/frame.rs:90:19
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let buf = try!(input.read_u16::<BigEndian>());
[INFO] [stdout]    |                   ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/frame.rs:93:19
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let len = try!(Self::read_length(header.payload_length, input));
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/frame.rs:95:24
[INFO] [stdout]    |
[INFO] [stdout] 95 |             let mask = try!(Self::read_mask(input));
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:101:27
[INFO] [stdout]     |
[INFO] [stdout] 101 |         let mut payload = try!(Self::read_payload(len, input));
[INFO] [stdout]     |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:116:9
[INFO] [stdout]     |
[INFO] [stdout] 116 |         try!(output.write_u16::<BigEndian>(hdr));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 |         try!(output.write(&self.payload));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:125:17
[INFO] [stdout]     |
[INFO] [stdout] 125 |                 try!(output.write_u16::<BigEndian>(self.payload.len() as u16))
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:132:17
[INFO] [stdout]     |
[INFO] [stdout] 132 |                 try!(output.write_u64::<BigEndian>(self.payload.len() as u64))
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:214:9
[INFO] [stdout]     |
[INFO] [stdout] 214 |         try!(input.read(&mut buf));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/frame.rs:221:9
[INFO] [stdout]     |
[INFO] [stdout] 221 |         try!(input.read(&mut payload));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:298:33
[INFO] [stdout]     |
[INFO] [stdout] 298 | ...                   let mut client = self.clients.get_mut(&token).unwrap();
[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 `mask` is never read
[INFO] [stdout]   --> src/frame.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub struct WebSocketFrame {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 73 |     header: WebSocketFrameHeader,
[INFO] [stdout] 74 |     mask: Option<[u8; 4]>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `WebSocketFrame` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.59s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "c6841616e8b5675f606d14af3b00c0196de12327dbee93e79f1b2ee8dcd995c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6841616e8b5675f606d14af3b00c0196de12327dbee93e79f1b2ee8dcd995c5", kill_on_drop: false }`
[INFO] [stdout] c6841616e8b5675f606d14af3b00c0196de12327dbee93e79f1b2ee8dcd995c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7726779dc1409617fcbc3b463ef870726c05f1638a30232cf10621ad3317ba9e
[INFO] running `Command { std: "docker" "start" "-a" "7726779dc1409617fcbc3b463ef870726c05f1638a30232cf10621ad3317ba9e", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/frame.rs:90:19
[INFO] [stderr]    |
[INFO] [stderr] 90 |         let buf = try!(input.read_u16::<BigEndian>());
[INFO] [stderr]    |                   ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/frame.rs:93:19
[INFO] [stderr]    |
[INFO] [stderr] 93 |         let len = try!(Self::read_length(header.payload_length, input));
[INFO] [stderr]    |                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]   --> src/frame.rs:95:24
[INFO] [stderr]    |
[INFO] [stderr] 95 |             let mask = try!(Self::read_mask(input));
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/frame.rs:101:27
[INFO] [stderr]     |
[INFO] [stderr] 101 |         let mut payload = try!(Self::read_payload(len, input));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/frame.rs:116:9
[INFO] [stderr]     |
[INFO] [stderr] 116 |         try!(output.write_u16::<BigEndian>(hdr));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/frame.rs:143:9
[INFO] [stderr]     |
[INFO] [stderr] 143 |         try!(output.write(&self.payload));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/frame.rs:125:17
[INFO] [stderr]     |
[INFO] [stderr] 125 |                 try!(output.write_u16::<BigEndian>(self.payload.len() as u16))
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/frame.rs:132:17
[INFO] [stderr]     |
[INFO] [stderr] 132 |                 try!(output.write_u64::<BigEndian>(self.payload.len() as u64))
[INFO] [stderr]     |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/frame.rs:214:9
[INFO] [stderr]     |
[INFO] [stderr] 214 |         try!(input.read(&mut buf));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/frame.rs:221:9
[INFO] [stderr]     |
[INFO] [stderr] 221 |         try!(input.read(&mut payload));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:298:33
[INFO] [stderr]     |
[INFO] [stderr] 298 | ...                   let mut client = self.clients.get_mut(&token).unwrap();
[INFO] [stderr]     |                           ----^^^^^^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `mask` is never read
[INFO] [stderr]   --> src/frame.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 72 | pub struct WebSocketFrame {
[INFO] [stderr]    |            -------------- field in this struct
[INFO] [stderr] 73 |     header: WebSocketFrameHeader,
[INFO] [stderr] 74 |     mask: Option<[u8; 4]>,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `WebSocketFrame` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `chat` (bin "chat" test) generated 12 warnings (run `cargo fix --bin "chat" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/chat-02f555b0fd1ef0ba)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7726779dc1409617fcbc3b463ef870726c05f1638a30232cf10621ad3317ba9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7726779dc1409617fcbc3b463ef870726c05f1638a30232cf10621ad3317ba9e", kill_on_drop: false }`
[INFO] [stdout] 7726779dc1409617fcbc3b463ef870726c05f1638a30232cf10621ad3317ba9e
