[INFO] cloning repository https://github.com/thomas9911/udp_tester
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thomas9911/udp_tester" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas9911%2Fudp_tester", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas9911%2Fudp_tester'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 973763d5ce32a72a1b61e64e075522c4d9c9e2a1
[INFO] checking thomas9911/udp_tester 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%2Fthomas9911%2Fudp_tester" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/thomas9911/udp_tester
[INFO] finished tweaking git repo https://github.com/thomas9911/udp_tester
[INFO] tweaked toml for git repo https://github.com/thomas9911/udp_tester written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/thomas9911/udp_tester 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/thomas9911/udp_tester 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] 1a0bbd30ceb64251d298ee1750ad69e1366a6f3c3c6bd3e589cfe1d16047d2fe
[INFO] running `Command { std: "docker" "start" "-a" "1a0bbd30ceb64251d298ee1750ad69e1366a6f3c3c6bd3e589cfe1d16047d2fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a0bbd30ceb64251d298ee1750ad69e1366a6f3c3c6bd3e589cfe1d16047d2fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a0bbd30ceb64251d298ee1750ad69e1366a6f3c3c6bd3e589cfe1d16047d2fe", kill_on_drop: false }`
[INFO] [stdout] 1a0bbd30ceb64251d298ee1750ad69e1366a6f3c3c6bd3e589cfe1d16047d2fe
[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] 18fdd13e2aaf4611951036e89006a9975d652eee70646c57f508a8681395bf4e
[INFO] running `Command { std: "docker" "start" "-a" "18fdd13e2aaf4611951036e89006a9975d652eee70646c57f508a8681395bf4e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]    Compiling anyhow v1.0.71
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]    Compiling tokio v1.29.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking statsd-parser v0.3.0 (https://github.com/appsignal/statsd_parser?rev=4ab5574fc409b4727c5c019aef0d75253005477d#4ab5574f)
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling syn v2.0.22
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking tokio-util v0.6.10
[INFO] [stderr]     Checking tokio-stream v0.1.14
[INFO] [stderr]     Checking datadog_dev_server v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/ping.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | /     loop {
[INFO] [stdout]  8 | |         let mut buffer = String::new();
[INFO] [stdout]  9 | |         std::io::stdin().read_to_string(&mut buffer)?;
[INFO] [stdout] ...  |
[INFO] [stdout] 18 | |         println!("{:?}", std::str::from_utf8(&buf[0..amt]));
[INFO] [stdout] 19 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 20 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `src`
[INFO] [stdout]   --> examples/ping.rs:15:19
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let (amt, src) = socket.recv_from(&mut buf)?;
[INFO] [stdout]    |                   ^^^ help: if this is intentional, prefix it with an underscore: `_src`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | /     /// Output to the file, otherwise don't output to any file
[INFO] [stdout] 39 | |     #[structopt(short, long, env = "OUTPUT_FILE")]
[INFO] [stdout] 40 | |     file: Option<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<String, Infallible>
[INFO] [stdout]   --> src/main.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | /     /// The StatsD host
[INFO] [stdout] 48 | |     #[structopt(short = "-H", long, default_value = "127.0.0.1", env = "STATSD_HOST")]
[INFO] [stdout] 49 | |     host: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 | /     /// The StatsD port
[INFO] [stdout] 51 | |     #[structopt(short, long, default_value = "8125", env = "STATSD_PORT")]
[INFO] [stdout] 52 | |     port: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `datadog_dev_server` (bin "datadog_dev_server" test) due to 3 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<String, Infallible>
[INFO] [stdout]   --> src/main.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | /     /// Output to the file, otherwise don't output to any file
[INFO] [stdout] 39 | |     #[structopt(short, long, env = "OUTPUT_FILE")]
[INFO] [stdout] 40 | |     file: Option<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<String, Infallible>
[INFO] [stdout]   --> src/main.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | /     /// The StatsD host
[INFO] [stdout] 48 | |     #[structopt(short = "-H", long, default_value = "127.0.0.1", env = "STATSD_HOST")]
[INFO] [stdout] 49 | |     host: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 | /     /// The StatsD port
[INFO] [stdout] 51 | |     #[structopt(short, long, default_value = "8125", env = "STATSD_PORT")]
[INFO] [stdout] 52 | |     port: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `datadog_dev_server` (bin "datadog_dev_server") due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "18fdd13e2aaf4611951036e89006a9975d652eee70646c57f508a8681395bf4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18fdd13e2aaf4611951036e89006a9975d652eee70646c57f508a8681395bf4e", kill_on_drop: false }`
[INFO] [stdout] 18fdd13e2aaf4611951036e89006a9975d652eee70646c57f508a8681395bf4e