[INFO] cloning repository https://github.com/Enter-tainer/serial2tcp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Enter-tainer/serial2tcp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEnter-tainer%2Fserial2tcp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEnter-tainer%2Fserial2tcp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 455090f13e87c7f9043ec2e8fca6e0456e8bfc01
[INFO] checking Enter-tainer/serial2tcp against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEnter-tainer%2Fserial2tcp" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Enter-tainer/serial2tcp
[INFO] finished tweaking git repo https://github.com/Enter-tainer/serial2tcp
[INFO] tweaked toml for git repo https://github.com/Enter-tainer/serial2tcp written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Enter-tainer/serial2tcp 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 git repo https://github.com/Enter-tainer/serial2tcp 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 36a4134e0cd7e7244d72886648ab94eb355a3eafc6698c597f211fe1f2068c37
[INFO] running `Command { std: "docker" "start" "-a" "36a4134e0cd7e7244d72886648ab94eb355a3eafc6698c597f211fe1f2068c37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36a4134e0cd7e7244d72886648ab94eb355a3eafc6698c597f211fe1f2068c37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36a4134e0cd7e7244d72886648ab94eb355a3eafc6698c597f211fe1f2068c37", kill_on_drop: false }`
[INFO] [stdout] 36a4134e0cd7e7244d72886648ab94eb355a3eafc6698c597f211fe1f2068c37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -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] 4b24033356922b424acaefc098eecc8abb3815d32e399f20d912ed437c9a30a4
[INFO] running `Command { std: "docker" "start" "-a" "4b24033356922b424acaefc098eecc8abb3815d32e399f20d912ed437c9a30a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.1
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling anyhow v1.0.56
[INFO] [stderr]     Checking lock_api v0.4.6
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking mio v0.8.2
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking terminal_size v0.1.17
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling clap_derive v3.1.4
[INFO] [stderr]     Checking tokio v1.17.0
[INFO] [stderr]     Checking futures-util v0.3.21
[INFO] [stderr]     Checking serialport v4.0.1
[INFO] [stderr]     Checking clap v3.1.6
[INFO] [stderr]     Checking mio-serial v5.0.2
[INFO] [stderr]     Checking futures-executor v0.3.21
[INFO] [stderr]     Checking futures v0.3.21
[INFO] [stderr]     Checking tokio-serial v5.4.2
[INFO] [stderr]     Checking serial2tcp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | /         #[clap(required = true, help = "ip address and port, e.g. 1.1.1.1:1080")]
[INFO] [stdout] 18 | |         addr: String,
[INFO] [stdout]    | |____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | /         #[clap(
[INFO] [stdout] 20 | |             required = true,
[INFO] [stdout] 21 | |             help = "name of serial port, e.g. /dev/ttyUSB1 for Linux, COM1 for Windows"
[INFO] [stdout] 22 | |         )]
[INFO] [stdout] 23 | |         serial_port: String,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 | /         #[clap(
[INFO] [stdout] 28 | |             required = true,
[INFO] [stdout] 29 | |             help = "name of serial port, e.g. /dev/ttyUSB1 for Linux, COM1 for Windows"
[INFO] [stdout] 30 | |         )]
[INFO] [stdout] 31 | |         serial_port: String,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | /         #[clap(
[INFO] [stdout] 33 | |             default_value("[::]:23000"),
[INFO] [stdout] 34 | |             help("server ip address and port, e.g. [::]:23000")
[INFO] [stdout] 35 | |         )]
[INFO] [stdout] 36 | |         addr: String,
[INFO] [stdout]    | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serial2tcp` (bin "serial2tcp" test) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | /         #[clap(required = true, help = "ip address and port, e.g. 1.1.1.1:1080")]
[INFO] [stdout] 18 | |         addr: String,
[INFO] [stdout]    | |____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | /         #[clap(
[INFO] [stdout] 20 | |             required = true,
[INFO] [stdout] 21 | |             help = "name of serial port, e.g. /dev/ttyUSB1 for Linux, COM1 for Windows"
[INFO] [stdout] 22 | |         )]
[INFO] [stdout] 23 | |         serial_port: String,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 | /         #[clap(
[INFO] [stdout] 28 | |             required = true,
[INFO] [stdout] 29 | |             help = "name of serial port, e.g. /dev/ttyUSB1 for Linux, COM1 for Windows"
[INFO] [stdout] 30 | |         )]
[INFO] [stdout] 31 | |         serial_port: String,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | /         #[clap(
[INFO] [stdout] 33 | |             default_value("[::]:23000"),
[INFO] [stdout] 34 | |             help("server ip address and port, e.g. [::]:23000")
[INFO] [stdout] 35 | |         )]
[INFO] [stdout] 36 | |         addr: String,
[INFO] [stdout]    | |____________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serial2tcp` (bin "serial2tcp") due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "4b24033356922b424acaefc098eecc8abb3815d32e399f20d912ed437c9a30a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b24033356922b424acaefc098eecc8abb3815d32e399f20d912ed437c9a30a4", kill_on_drop: false }`
[INFO] [stdout] 4b24033356922b424acaefc098eecc8abb3815d32e399f20d912ed437c9a30a4