[INFO] cloning repository https://github.com/KrutNA/huffman-coding
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KrutNA/huffman-coding" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKrutNA%2Fhuffman-coding", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKrutNA%2Fhuffman-coding'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0d1ac5cb3e54d7134926523fb07685a59f14264b
[INFO] building KrutNA/huffman-coding against master#222c5724ecc922fe67815f428c19f82c129d9386 for pr-97334
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKrutNA%2Fhuffman-coding" "/workspace/builds/worker-30/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-30/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/KrutNA/huffman-coding on toolchain 222c5724ecc922fe67815f428c19f82c129d9386
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/KrutNA/huffman-coding
[INFO] finished tweaking git repo https://github.com/KrutNA/huffman-coding
[INFO] tweaked toml for git repo https://github.com/KrutNA/huffman-coding written to /workspace/builds/worker-30/source/Cargo.toml
[INFO] crate git repo https://github.com/KrutNA/huffman-coding already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded term_size v0.3.2
[INFO] [stderr]   Downloaded clap v2.27.1
[INFO] [stderr]   Downloaded serde-hjson v0.8.2
[INFO] [stderr]   Downloaded directories v1.0.2
[INFO] [stderr]   Downloaded config v0.9.3
[INFO] [stderr]   Downloaded isatty v0.1.9
[INFO] [stderr]   Downloaded tint v1.0.1
[INFO] [stderr]   Downloaded serde-value v0.5.3
[INFO] [stderr]   Downloaded yaml-rust v0.4.4
[INFO] [stderr]   Downloaded ptree v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9fbfa3d076521440736881a65cbd9429209556af7256fbae5dadb5610048203d
[INFO] running `Command { std: "docker" "start" "-a" "9fbfa3d076521440736881a65cbd9429209556af7256fbae5dadb5610048203d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9fbfa3d076521440736881a65cbd9429209556af7256fbae5dadb5610048203d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fbfa3d076521440736881a65cbd9429209556af7256fbae5dadb5610048203d", kill_on_drop: false }`
[INFO] [stdout] 9fbfa3d076521440736881a65cbd9429209556af7256fbae5dadb5610048203d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff6c0231f4b4da5689bf17b2c37de5d0187bac2bbe7b598ffd32f5ef698994cd
[INFO] running `Command { std: "docker" "start" "-a" "ff6c0231f4b4da5689bf17b2c37de5d0187bac2bbe7b598ffd32f5ef698994cd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling strsim v0.6.0
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling bitflags v0.9.1
[INFO] [stderr]    Compiling term_size v0.3.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling textwrap v0.9.0
[INFO] [stderr]    Compiling clap v2.27.1
[INFO] [stderr]    Compiling huffman-coding v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.69s
[INFO] running `Command { std: "docker" "inspect" "ff6c0231f4b4da5689bf17b2c37de5d0187bac2bbe7b598ffd32f5ef698994cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff6c0231f4b4da5689bf17b2c37de5d0187bac2bbe7b598ffd32f5ef698994cd", kill_on_drop: false }`
[INFO] [stdout] ff6c0231f4b4da5689bf17b2c37de5d0187bac2bbe7b598ffd32f5ef698994cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-30/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+222c5724ecc922fe67815f428c19f82c129d9386" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 14e60daa95292336718fce1eb4dec1782293aaf7d44562b22fd2b7c6e59d6fcf
[INFO] running `Command { std: "docker" "start" "-a" "14e60daa95292336718fce1eb4dec1782293aaf7d44562b22fd2b7c6e59d6fcf", kill_on_drop: false }`
[INFO] [stderr]    Compiling huffman-coding v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/huffman_coding-bf740a54b63e00c2)
[INFO] running `Command { std: "docker" "inspect" "14e60daa95292336718fce1eb4dec1782293aaf7d44562b22fd2b7c6e59d6fcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14e60daa95292336718fce1eb4dec1782293aaf7d44562b22fd2b7c6e59d6fcf", kill_on_drop: false }`
[INFO] [stdout] 14e60daa95292336718fce1eb4dec1782293aaf7d44562b22fd2b7c6e59d6fcf