[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] 7081b2a1d06d7b51dd952fcb2693d908f9d9cac2
[INFO] checking thomas9911/udp_tester against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas9911%2Fudp_tester" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thomas9911/udp_tester on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-4/source/Cargo.toml
[INFO] crate git repo https://github.com/thomas9911/udp_tester already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/appsignal/statsd_parser`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e6d797595f3a0dfa0a4f7106d4c029fb2c4c51f69abdbcf18325b8f6e2463492
[INFO] running `Command { std: "docker" "start" "-a" "e6d797595f3a0dfa0a4f7106d4c029fb2c4c51f69abdbcf18325b8f6e2463492", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6d797595f3a0dfa0a4f7106d4c029fb2c4c51f69abdbcf18325b8f6e2463492", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6d797595f3a0dfa0a4f7106d4c029fb2c4c51f69abdbcf18325b8f6e2463492", kill_on_drop: false }`
[INFO] [stdout] e6d797595f3a0dfa0a4f7106d4c029fb2c4c51f69abdbcf18325b8f6e2463492
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7cb98055273e6aae1d6a41f5a3635df31180f548badeac6f49fce58f9ea26792
[INFO] running `Command { std: "docker" "start" "-a" "7cb98055273e6aae1d6a41f5a3635df31180f548badeac6f49fce58f9ea26792", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.59
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking statsd-parser v0.3.0 (https://github.com/appsignal/statsd_parser?branch=main#4ab5574f)
[INFO] [stderr]    Compiling tokio v1.1.1
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking log v0.4.13
[INFO] [stderr]     Checking mio v0.7.7
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tokio-macros v1.0.0
[INFO] [stderr]    Compiling async-stream-impl v0.3.0
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking async-stream v0.3.0
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking tokio-stream v0.1.2
[INFO] [stderr]     Checking tokio-util v0.6.2
[INFO] [stderr]     Checking datadog_dev_server v0.2.0 (/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] 10 | |
[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)]` 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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.28s
[INFO] running `Command { std: "docker" "inspect" "7cb98055273e6aae1d6a41f5a3635df31180f548badeac6f49fce58f9ea26792", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cb98055273e6aae1d6a41f5a3635df31180f548badeac6f49fce58f9ea26792", kill_on_drop: false }`
[INFO] [stdout] 7cb98055273e6aae1d6a41f5a3635df31180f548badeac6f49fce58f9ea26792