[INFO] cloning repository https://github.com/angelo-rendina-pendo/lz77
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/angelo-rendina-pendo/lz77" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fangelo-rendina-pendo%2Flz77", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fangelo-rendina-pendo%2Flz77'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 841fbb18891df01cc8ad5cd476a22b4cb336f02d
[INFO] checking angelo-rendina-pendo/lz77 against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fangelo-rendina-pendo%2Flz77" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/angelo-rendina-pendo/lz77 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/angelo-rendina-pendo/lz77
[INFO] finished tweaking git repo https://github.com/angelo-rendina-pendo/lz77
[INFO] tweaked toml for git repo https://github.com/angelo-rendina-pendo/lz77 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/angelo-rendina-pendo/lz77 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 535a54b01f476cb47bc732873174796cec3c39f4d9b49c310e3e5fb5304c0067
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "535a54b01f476cb47bc732873174796cec3c39f4d9b49c310e3e5fb5304c0067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "535a54b01f476cb47bc732873174796cec3c39f4d9b49c310e3e5fb5304c0067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "535a54b01f476cb47bc732873174796cec3c39f4d9b49c310e3e5fb5304c0067", kill_on_drop: false }`
[INFO] [stdout] 535a54b01f476cb47bc732873174796cec3c39f4d9b49c310e3e5fb5304c0067
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] b4805a0a08b84facb75075969e590c505cd8737bbc4cca890e973c504b7f8b06
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b4805a0a08b84facb75075969e590c505cd8737bbc4cca890e973c504b7f8b06", kill_on_drop: false }`
[INFO] [stderr]     Checking lz77 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `from_string`
[INFO] [stdout]  --> src/lz77/encode.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn from_string<U>(input: &str) -> Vec<Code<char, U>>
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `to_string`
[INFO] [stdout]  --> src/lz77/decode.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn to_string<U>(encoded: &[Code<char, U>]) -> String
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mem_size`
[INFO] [stdout]   --> src/lz77/mod.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn mem_size() -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mem_size`
[INFO] [stdout]   --> src/lz77/mod.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn mem_size() -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "b4805a0a08b84facb75075969e590c505cd8737bbc4cca890e973c504b7f8b06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4805a0a08b84facb75075969e590c505cd8737bbc4cca890e973c504b7f8b06", kill_on_drop: false }`
[INFO] [stdout] b4805a0a08b84facb75075969e590c505cd8737bbc4cca890e973c504b7f8b06