[INFO] fetching crate async-minecraft-ping 0.8.0...
[INFO] checking async-minecraft-ping-0.8.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate async-minecraft-ping 0.8.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate async-minecraft-ping 0.8.0
[INFO] finished tweaking crates.io crate async-minecraft-ping 0.8.0
[INFO] tweaked toml for crates.io crate async-minecraft-ping 0.8.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate async-minecraft-ping 0.8.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate async-minecraft-ping 0.8.0 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa56ee20c6e787a5521b0ca45b22b4334ea1c37ce4b88785419af7a554d163a6
[INFO] running `Command { std: "docker" "start" "-a" "aa56ee20c6e787a5521b0ca45b22b4334ea1c37ce4b88785419af7a554d163a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa56ee20c6e787a5521b0ca45b22b4334ea1c37ce4b88785419af7a554d163a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa56ee20c6e787a5521b0ca45b22b4334ea1c37ce4b88785419af7a554d163a6", kill_on_drop: false }`
[INFO] [stdout] aa56ee20c6e787a5521b0ca45b22b4334ea1c37ce4b88785419af7a554d163a6
[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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df5571fe314373b135d2a79111df362f711ed2e5330e1f4cfce0a39b5557f6ce
[INFO] running `Command { std: "docker" "start" "-a" "df5571fe314373b135d2a79111df362f711ed2e5330e1f4cfce0a39b5557f6ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.35
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde_derive v1.0.132
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde v1.0.132
[INFO] [stderr]    Compiling serde_json v1.0.73
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling async-trait v0.1.52
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling anyhow v1.0.52
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking tokio v1.15.0
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking async-minecraft-ping v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `packet_id` is never read
[INFO] [stdout]    --> src/protocol.rs:351:9
[INFO] [stdout]     |
[INFO] [stdout] 350 | pub struct ResponsePacket {
[INFO] [stdout]     |            -------------- field in this struct
[INFO] [stdout] 351 |     pub packet_id: usize,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `packet_id` is never read
[INFO] [stdout]    --> src/protocol.rs:404:9
[INFO] [stdout]     |
[INFO] [stdout] 403 | pub struct PongPacket {
[INFO] [stdout]     |            ---------- field in this struct
[INFO] [stdout] 404 |     pub packet_id: usize,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `protocol_version`, `address`, and `port` are never read
[INFO] [stdout]    --> src/server.rs:225:5
[INFO] [stdout]     |
[INFO] [stdout] 223 | pub struct PingConnection {
[INFO] [stdout]     |            -------------- fields in this struct
[INFO] [stdout] 224 |     stream: TcpStream,
[INFO] [stdout] 225 |     protocol_version: usize,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 226 |     address: String,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 227 |     port: u16,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `packet_id` is never read
[INFO] [stdout]    --> src/protocol.rs:351:9
[INFO] [stdout]     |
[INFO] [stdout] 350 | pub struct ResponsePacket {
[INFO] [stdout]     |            -------------- field in this struct
[INFO] [stdout] 351 |     pub packet_id: usize,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `packet_id` is never read
[INFO] [stdout]    --> src/protocol.rs:404:9
[INFO] [stdout]     |
[INFO] [stdout] 403 | pub struct PongPacket {
[INFO] [stdout]     |            ---------- field in this struct
[INFO] [stdout] 404 |     pub packet_id: usize,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `protocol_version`, `address`, and `port` are never read
[INFO] [stdout]    --> src/server.rs:225:5
[INFO] [stdout]     |
[INFO] [stdout] 223 | pub struct PingConnection {
[INFO] [stdout]     |            -------------- fields in this struct
[INFO] [stdout] 224 |     stream: TcpStream,
[INFO] [stdout] 225 |     protocol_version: usize,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 226 |     address: String,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 227 |     port: u16,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> examples/status.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | /     /// Server to connect to
[INFO] [stdout] 10 | |     #[structopt()]
[INFO] [stdout] 11 | |     address: String,
[INFO] [stdout]    | |___________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `async-minecraft-ping` (example "status") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "df5571fe314373b135d2a79111df362f711ed2e5330e1f4cfce0a39b5557f6ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df5571fe314373b135d2a79111df362f711ed2e5330e1f4cfce0a39b5557f6ce", kill_on_drop: false }`
[INFO] [stdout] df5571fe314373b135d2a79111df362f711ed2e5330e1f4cfce0a39b5557f6ce