[INFO] cloning repository https://github.com/AndrewSpeed/coding-challenge-huffman
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AndrewSpeed/coding-challenge-huffman" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndrewSpeed%2Fcoding-challenge-huffman", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndrewSpeed%2Fcoding-challenge-huffman'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a6ef48af52b88aae49c799178f795b23b5703e6a
[INFO] checking AndrewSpeed/coding-challenge-huffman against master#3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0 for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndrewSpeed%2Fcoding-challenge-huffman" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AndrewSpeed/coding-challenge-huffman
[INFO] finished tweaking git repo https://github.com/AndrewSpeed/coding-challenge-huffman
[INFO] tweaked toml for git repo https://github.com/AndrewSpeed/coding-challenge-huffman written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AndrewSpeed/coding-challenge-huffman on toolchain 3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AndrewSpeed/coding-challenge-huffman 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" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 74526d0a985e7dbb53a27cb0948b123c986a3de5f916ced0f53c871f2961954b
[INFO] running `Command { std: "docker" "start" "-a" "74526d0a985e7dbb53a27cb0948b123c986a3de5f916ced0f53c871f2961954b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74526d0a985e7dbb53a27cb0948b123c986a3de5f916ced0f53c871f2961954b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74526d0a985e7dbb53a27cb0948b123c986a3de5f916ced0f53c871f2961954b", kill_on_drop: false }`
[INFO] [stdout] 74526d0a985e7dbb53a27cb0948b123c986a3de5f916ced0f53c871f2961954b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e7c6c134faa70d84869e5bfed78ce021bfaaa7d5f5d607227850545134d055e
[INFO] running `Command { std: "docker" "start" "-a" "2e7c6c134faa70d84869e5bfed78ce021bfaaa7d5f5d607227850545134d055e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling anyhow v1.0.93
[INFO] [stderr]     Checking clap_lex v0.7.3
[INFO] [stderr]     Checking clap_builder v4.5.21
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.87
[INFO] [stderr]    Compiling clap_derive v4.5.18
[INFO] [stderr]     Checking clap v4.5.21
[INFO] [stderr]     Checking cc-huffman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `is_leaf` is never used
[INFO] [stdout]  --> src/huffman_tree.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait Node {
[INFO] [stdout]   |       ---- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 8 |     fn is_leaf(&self) -> bool;
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_root`, `new_tree`, and `prefix_codes` are never used
[INFO] [stdout]   --> src/huffman_tree.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl HuffmanTree {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn new_root(left: Option<Self>, right: Option<Self>) -> Self {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     fn new_tree(first: Option<Self>, second: Option<Self>) -> Option<Self> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn prefix_codes(&self, parent_prefix: Option<&str>) -> HashMap<char, String> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.06s
[INFO] running `Command { std: "docker" "inspect" "2e7c6c134faa70d84869e5bfed78ce021bfaaa7d5f5d607227850545134d055e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e7c6c134faa70d84869e5bfed78ce021bfaaa7d5f5d607227850545134d055e", kill_on_drop: false }`
[INFO] [stdout] 2e7c6c134faa70d84869e5bfed78ce021bfaaa7d5f5d607227850545134d055e
