[INFO] cloning repository https://github.com/V-Mann-Nick/huffman
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/V-Mann-Nick/huffman" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FV-Mann-Nick%2Fhuffman", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FV-Mann-Nick%2Fhuffman'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] adbdfbf204a16da5a95431088547f1ae30a20079
[INFO] checking V-Mann-Nick/huffman against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FV-Mann-Nick%2Fhuffman" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/V-Mann-Nick/huffman on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/V-Mann-Nick/huffman
[INFO] finished tweaking git repo https://github.com/V-Mann-Nick/huffman
[INFO] tweaked toml for git repo https://github.com/V-Mann-Nick/huffman written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/V-Mann-Nick/huffman already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded endio_bit v0.2.0
[INFO] [stderr]   Downloaded termprogress v0.3.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea6d66581a877ab5c71a0f0d174133651da015c85a86e66e7cf5b3ec7e4e43c3
[INFO] running `Command { std: "docker" "start" "-a" "ea6d66581a877ab5c71a0f0d174133651da015c85a86e66e7cf5b3ec7e4e43c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea6d66581a877ab5c71a0f0d174133651da015c85a86e66e7cf5b3ec7e4e43c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea6d66581a877ab5c71a0f0d174133651da015c85a86e66e7cf5b3ec7e4e43c3", kill_on_drop: false }`
[INFO] [stdout] ea6d66581a877ab5c71a0f0d174133651da015c85a86e66e7cf5b3ec7e4e43c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 546b68941a4a3b958c48197866b2506367229d72472a15c1e764259f9a76e98b
[INFO] running `Command { std: "docker" "start" "-a" "546b68941a4a3b958c48197866b2506367229d72472a15c1e764259f9a76e98b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking endio_bit v0.2.0
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling priority-queue v1.1.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking arrayvec v0.4.12
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking num-format v0.4.0
[INFO] [stderr]    Compiling termprogress v0.3.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking terminal_size v0.1.17
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking huffman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/encode.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         &self.codes_from_node(root, BitVec::new(), &mut code_map);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/encode.rs:72:17
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 &self.codes_from_node(&branch.unwrap(), bits, code_map);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/encode.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         &self.codes_from_node(root, BitVec::new(), &mut code_map);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/encode.rs:72:17
[INFO] [stdout]    |
[INFO] [stdout] 72 |                 &self.codes_from_node(&branch.unwrap(), bits, code_map);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.53s
[INFO] running `Command { std: "docker" "inspect" "546b68941a4a3b958c48197866b2506367229d72472a15c1e764259f9a76e98b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "546b68941a4a3b958c48197866b2506367229d72472a15c1e764259f9a76e98b", kill_on_drop: false }`
[INFO] [stdout] 546b68941a4a3b958c48197866b2506367229d72472a15c1e764259f9a76e98b