[INFO] cloning repository https://github.com/Pjiwm/HuffmanCoding-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Pjiwm/HuffmanCoding-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPjiwm%2FHuffmanCoding-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPjiwm%2FHuffmanCoding-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2991f3805267b7979569c35fad40d6d9add0a465
[INFO] checking Pjiwm/HuffmanCoding-Rust against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPjiwm%2FHuffmanCoding-Rust" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Pjiwm/HuffmanCoding-Rust on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Pjiwm/HuffmanCoding-Rust
[INFO] finished tweaking git repo https://github.com/Pjiwm/HuffmanCoding-Rust
[INFO] tweaked toml for git repo https://github.com/Pjiwm/HuffmanCoding-Rust written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Pjiwm/HuffmanCoding-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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "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 anyhow v1.0.70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07ccdd11aff1328978ba36aa957eb9a0821473cf5f6b2b5eb021d7c143c5f868
[INFO] running `Command { std: "docker" "start" "-a" "07ccdd11aff1328978ba36aa957eb9a0821473cf5f6b2b5eb021d7c143c5f868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07ccdd11aff1328978ba36aa957eb9a0821473cf5f6b2b5eb021d7c143c5f868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07ccdd11aff1328978ba36aa957eb9a0821473cf5f6b2b5eb021d7c143c5f868", kill_on_drop: false }`
[INFO] [stdout] 07ccdd11aff1328978ba36aa957eb9a0821473cf5f6b2b5eb021d7c143c5f868
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5de3dd51e5a898aa14fc666a9af2cc82d7880db6c9b8e9e5895f1f18c522d70
[INFO] running `Command { std: "docker" "start" "-a" "e5de3dd51e5a898aa14fc666a9af2cc82d7880db6c9b8e9e5895f1f18c522d70", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.70
[INFO] [stderr]     Checking huffman-coding v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `codes_helper2` is never used
[INFO] [stdout]    --> src/lib.rs:157:4
[INFO] [stdout]     |
[INFO] [stdout] 157 | fn codes_helper2(heap_queue: HashMap<char, u32>) -> (HashMap<char, String>, HashMap<String, char>) {
[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] [stdout] warning: function `codes_helper2` is never used
[INFO] [stdout]    --> src/lib.rs:157:4
[INFO] [stdout]     |
[INFO] [stdout] 157 | fn codes_helper2(heap_queue: HashMap<char, u32>) -> (HashMap<char, String>, HashMap<String, char>) {
[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` profile [unoptimized + debuginfo] target(s) in 1.32s
[INFO] running `Command { std: "docker" "inspect" "e5de3dd51e5a898aa14fc666a9af2cc82d7880db6c9b8e9e5895f1f18c522d70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5de3dd51e5a898aa14fc666a9af2cc82d7880db6c9b8e9e5895f1f18c522d70", kill_on_drop: false }`
[INFO] [stdout] e5de3dd51e5a898aa14fc666a9af2cc82d7880db6c9b8e9e5895f1f18c522d70
[INFO] checking Pjiwm/HuffmanCoding-Rust against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPjiwm%2FHuffmanCoding-Rust" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Pjiwm/HuffmanCoding-Rust on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Pjiwm/HuffmanCoding-Rust
[INFO] finished tweaking git repo https://github.com/Pjiwm/HuffmanCoding-Rust
[INFO] tweaked toml for git repo https://github.com/Pjiwm/HuffmanCoding-Rust written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Pjiwm/HuffmanCoding-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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 46739b865a48a80328345babf863fe9e559f6f9f4bc2d232d30085375fbb278e
[INFO] running `Command { std: "docker" "start" "-a" "46739b865a48a80328345babf863fe9e559f6f9f4bc2d232d30085375fbb278e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46739b865a48a80328345babf863fe9e559f6f9f4bc2d232d30085375fbb278e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46739b865a48a80328345babf863fe9e559f6f9f4bc2d232d30085375fbb278e", kill_on_drop: false }`
[INFO] [stdout] 46739b865a48a80328345babf863fe9e559f6f9f4bc2d232d30085375fbb278e
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 066c1a363c4703e0d3ac0751f0fd71063ed5ed95b7eea2afdc30c06cc09656cd
[INFO] running `Command { std: "docker" "start" "-a" "066c1a363c4703e0d3ac0751f0fd71063ed5ed95b7eea2afdc30c06cc09656cd", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.70
[INFO] [stderr]     Checking huffman-coding v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `codes_helper2` is never used
[INFO] [stdout]    --> src/lib.rs:157:4
[INFO] [stdout]     |
[INFO] [stdout] 157 | fn codes_helper2(heap_queue: HashMap<char, u32>) -> (HashMap<char, String>, HashMap<String, char>) {
[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] [stdout] warning: function `codes_helper2` is never used
[INFO] [stdout]    --> src/lib.rs:157:4
[INFO] [stdout]     |
[INFO] [stdout] 157 | fn codes_helper2(heap_queue: HashMap<char, u32>) -> (HashMap<char, String>, HashMap<String, char>) {
[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` profile [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `Command { std: "docker" "inspect" "066c1a363c4703e0d3ac0751f0fd71063ed5ed95b7eea2afdc30c06cc09656cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "066c1a363c4703e0d3ac0751f0fd71063ed5ed95b7eea2afdc30c06cc09656cd", kill_on_drop: false }`
[INFO] [stdout] 066c1a363c4703e0d3ac0751f0fd71063ed5ed95b7eea2afdc30c06cc09656cd