[INFO] cloning repository https://github.com/fabio-gustav/HuffmanCodeRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fabio-gustav/HuffmanCodeRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffabio-gustav%2FHuffmanCodeRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffabio-gustav%2FHuffmanCodeRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 591fbb338161dd574102cad767a053e123d01f0e
[INFO] checking fabio-gustav/HuffmanCodeRust against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffabio-gustav%2FHuffmanCodeRust" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fabio-gustav/HuffmanCodeRust
[INFO] finished tweaking git repo https://github.com/fabio-gustav/HuffmanCodeRust
[INFO] tweaked toml for git repo https://github.com/fabio-gustav/HuffmanCodeRust written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fabio-gustav/HuffmanCodeRust on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fabio-gustav/HuffmanCodeRust 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db0583d0c318e8c5ba557bbb4c32377b0bbdc3e3735ba21423c92b01e5e0f7c3
[INFO] running `Command { std: "docker" "start" "-a" "db0583d0c318e8c5ba557bbb4c32377b0bbdc3e3735ba21423c92b01e5e0f7c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db0583d0c318e8c5ba557bbb4c32377b0bbdc3e3735ba21423c92b01e5e0f7c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db0583d0c318e8c5ba557bbb4c32377b0bbdc3e3735ba21423c92b01e5e0f7c3", kill_on_drop: false }`
[INFO] [stdout] db0583d0c318e8c5ba557bbb4c32377b0bbdc3e3735ba21423c92b01e5e0f7c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f272646177c91961567f9a8fc30cccdc43cdc8178c98368e28de5b73ff812fb4
[INFO] running `Command { std: "docker" "start" "-a" "f272646177c91961567f9a8fc30cccdc43cdc8178c98368e28de5b73ff812fb4", kill_on_drop: false }`
[INFO] [stderr]     Checking HuffmanCodeRust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `decode` is never used
[INFO] [stdout]   --> src/main.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn decode(to_decode: String, root: &Box<Node>) -> String{
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode` is never used
[INFO] [stdout]   --> src/main.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn decode(to_decode: String, root: &Box<Node>) -> String{
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "f272646177c91961567f9a8fc30cccdc43cdc8178c98368e28de5b73ff812fb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f272646177c91961567f9a8fc30cccdc43cdc8178c98368e28de5b73ff812fb4", kill_on_drop: false }`
[INFO] [stdout] f272646177c91961567f9a8fc30cccdc43cdc8178c98368e28de5b73ff812fb4