[INFO] cloning repository https://github.com/ktraff/dns
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ktraff/dns" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fktraff%2Fdns", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fktraff%2Fdns'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 33508c0b373d63eb3399ae56e184bd64cb08dcfe
[INFO] checking ktraff/dns against master#32cd9114712a24010b0583624dc52ac302194128 for pr-143717
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fktraff%2Fdns" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ktraff/dns
[INFO] finished tweaking git repo https://github.com/ktraff/dns
[INFO] tweaked toml for git repo https://github.com/ktraff/dns written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ktraff/dns on toolchain 32cd9114712a24010b0583624dc52ac302194128
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+32cd9114712a24010b0583624dc52ac302194128" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ktraff/dns 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" "+32cd9114712a24010b0583624dc52ac302194128" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+32cd9114712a24010b0583624dc52ac302194128" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f2d0bdcb28f3c9ce641051252602014f1ac1985a48865b30643d7d0fee5de9a
[INFO] running `Command { std: "docker" "start" "-a" "4f2d0bdcb28f3c9ce641051252602014f1ac1985a48865b30643d7d0fee5de9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f2d0bdcb28f3c9ce641051252602014f1ac1985a48865b30643d7d0fee5de9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f2d0bdcb28f3c9ce641051252602014f1ac1985a48865b30643d7d0fee5de9a", kill_on_drop: false }`
[INFO] [stdout] 4f2d0bdcb28f3c9ce641051252602014f1ac1985a48865b30643d7d0fee5de9a
[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=forbid" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+32cd9114712a24010b0583624dc52ac302194128" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0649b9b882b4547f6e65359dec633285dead02c254ef12f8d46e3fabcfc6161a
[INFO] running `Command { std: "docker" "start" "-a" "0649b9b882b4547f6e65359dec633285dead02c254ef12f8d46e3fabcfc6161a", kill_on_drop: false }`
[INFO] [stderr]     Checking dns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/dns/buffer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/dns/packet.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/dns/buffer.rs:1:41
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{Result, Error, ErrorKind, Read};
[INFO] [stdout]   |                                         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/dns/packet.rs:1:41
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{Result, Error, ErrorKind, Read};
[INFO] [stdout]   |                                         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/dns/packet.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |             _ => { write!(f, "UNKNOWN")?; },
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/dns/packet.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             ResponseCode::NOERROR => { write!(f, "NOERROR")?; },
[INFO] [stdout]    |             --------------------- matches some of the same values
[INFO] [stdout] 43 |             ResponseCode::FORMERR => { write!(f, "FORMERR")?; },
[INFO] [stdout]    |             --------------------- matches some of the same values
[INFO] [stdout] 44 |             ResponseCode::SERVFAIL => { write!(f, "SERVFAIL")?; },
[INFO] [stdout]    |             ---------------------- matches some of the same values
[INFO] [stdout] 45 |             ResponseCode::NXDOMAIN => { write!(f, "NXDOMAIN")?; },
[INFO] [stdout]    |             ---------------------- matches some of the same values
[INFO] [stdout] 46 |             ResponseCode::NOTIMP => { write!(f, "NOTIMP")?; },
[INFO] [stdout] 47 |             _ => { write!(f, "UNKNOWN")?; },
[INFO] [stdout]    |             ^ ...and 1 other patterns collectively make this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/dns/packet.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |             _ => { write!(f, "UNKNOWN")?; },
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/dns/packet.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |             ResponseCode::NOERROR => { write!(f, "NOERROR")?; },
[INFO] [stdout]    |             --------------------- matches some of the same values
[INFO] [stdout] 43 |             ResponseCode::FORMERR => { write!(f, "FORMERR")?; },
[INFO] [stdout]    |             --------------------- matches some of the same values
[INFO] [stdout] 44 |             ResponseCode::SERVFAIL => { write!(f, "SERVFAIL")?; },
[INFO] [stdout]    |             ---------------------- matches some of the same values
[INFO] [stdout] 45 |             ResponseCode::NXDOMAIN => { write!(f, "NXDOMAIN")?; },
[INFO] [stdout]    |             ---------------------- matches some of the same values
[INFO] [stdout] 46 |             ResponseCode::NOTIMP => { write!(f, "NOTIMP")?; },
[INFO] [stdout] 47 |             _ => { write!(f, "UNKNOWN")?; },
[INFO] [stdout]    |             ^ ...and 1 other patterns collectively make this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/client.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/client.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/client.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/client.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/server.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/server.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/server.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/server.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]  --> src/server.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]  --> src/server.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let args: Vec<String> = env::args().collect();
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "0649b9b882b4547f6e65359dec633285dead02c254ef12f8d46e3fabcfc6161a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0649b9b882b4547f6e65359dec633285dead02c254ef12f8d46e3fabcfc6161a", kill_on_drop: false }`
[INFO] [stdout] 0649b9b882b4547f6e65359dec633285dead02c254ef12f8d46e3fabcfc6161a