[INFO] cloning repository https://github.com/KarolBorecki/huffman-coding-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KarolBorecki/huffman-coding-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKarolBorecki%2Fhuffman-coding-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKarolBorecki%2Fhuffman-coding-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2b12f50046b1a30016c1d79e1ebea272e10dad14
[INFO] checking KarolBorecki/huffman-coding-rust against try#c0a9760914bada211f4924ee16d41ae1a366d2ba for pr-148545
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKarolBorecki%2Fhuffman-coding-rust" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/KarolBorecki/huffman-coding-rust
[INFO] finished tweaking git repo https://github.com/KarolBorecki/huffman-coding-rust
[INFO] tweaked toml for git repo https://github.com/KarolBorecki/huffman-coding-rust written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/KarolBorecki/huffman-coding-rust on toolchain c0a9760914bada211f4924ee16d41ae1a366d2ba
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c0a9760914bada211f4924ee16d41ae1a366d2ba" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/KarolBorecki/huffman-coding-rust 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" "+c0a9760914bada211f4924ee16d41ae1a366d2ba" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+c0a9760914bada211f4924ee16d41ae1a366d2ba" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 20e13ec06ffc11c02c5112b3a2ecfa00b66790de9a7fd7955f6bc36315578921
[INFO] running `Command { std: "docker" "start" "-a" "20e13ec06ffc11c02c5112b3a2ecfa00b66790de9a7fd7955f6bc36315578921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20e13ec06ffc11c02c5112b3a2ecfa00b66790de9a7fd7955f6bc36315578921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20e13ec06ffc11c02c5112b3a2ecfa00b66790de9a7fd7955f6bc36315578921", kill_on_drop: false }`
[INFO] [stdout] 20e13ec06ffc11c02c5112b3a2ecfa00b66790de9a7fd7955f6bc36315578921
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+c0a9760914bada211f4924ee16d41ae1a366d2ba" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a094a65d097f97ab217d81af83e52987c69ab3fd318437ba163c73243ff4668
[INFO] running `Command { std: "docker" "start" "-a" "5a094a65d097f97ab217d81af83e52987c69ab3fd318437ba163c73243ff4668", kill_on_drop: false }`
[INFO] [stderr]     Checking huffman-coding-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `entropy_from_freq` is never used
[INFO] [stdout]   --> src/huffman.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn entropy_from_freq(freq: &FreqTable) -> f64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `entropy_from_freq` is never used
[INFO] [stdout]   --> src/huffman.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn entropy_from_freq(freq: &FreqTable) -> f64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "5a094a65d097f97ab217d81af83e52987c69ab3fd318437ba163c73243ff4668", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a094a65d097f97ab217d81af83e52987c69ab3fd318437ba163c73243ff4668", kill_on_drop: false }`
[INFO] [stdout] 5a094a65d097f97ab217d81af83e52987c69ab3fd318437ba163c73243ff4668