[INFO] cloning repository https://github.com/taaaaakahiro/rust-blockchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/taaaaakahiro/rust-blockchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaaaaakahiro%2Frust-blockchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaaaaakahiro%2Frust-blockchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b0030b301dfb67178388fc18a882f81e53f45c69
[INFO] checking taaaaakahiro/rust-blockchain/b0030b301dfb67178388fc18a882f81e53f45c69 against master#64b72a1fa5449d928d5f553b01a596b78ee255d2 for pr-153457
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftaaaaakahiro%2Frust-blockchain" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/taaaaakahiro/rust-blockchain
[INFO] finished tweaking git repo https://github.com/taaaaakahiro/rust-blockchain
[INFO] tweaked toml for git repo https://github.com/taaaaakahiro/rust-blockchain written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/taaaaakahiro/rust-blockchain on toolchain 64b72a1fa5449d928d5f553b01a596b78ee255d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+64b72a1fa5449d928d5f553b01a596b78ee255d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/taaaaakahiro/rust-blockchain 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" "+64b72a1fa5449d928d5f553b01a596b78ee255d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crypto-hash v0.3.4
[INFO] [stderr]   Downloaded commoncrypto-sys v0.2.0
[INFO] [stderr]   Downloaded commoncrypto v0.2.0
[INFO] [stderr]   Downloaded hex v0.3.2
[INFO] [stderr]   Downloaded syn v2.0.49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+64b72a1fa5449d928d5f553b01a596b78ee255d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7649e5d5c80c547fdac6d654b7cfbc31542505bcad80ba9aca906316d4e6623
[INFO] running `Command { std: "docker" "start" "-a" "d7649e5d5c80c547fdac6d654b7cfbc31542505bcad80ba9aca906316d4e6623", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7649e5d5c80c547fdac6d654b7cfbc31542505bcad80ba9aca906316d4e6623", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7649e5d5c80c547fdac6d654b7cfbc31542505bcad80ba9aca906316d4e6623", kill_on_drop: false }`
[INFO] [stdout] d7649e5d5c80c547fdac6d654b7cfbc31542505bcad80ba9aca906316d4e6623
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+64b72a1fa5449d928d5f553b01a596b78ee255d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 82d80813648ff9627d90a082060cf35827be2af1ac793cceb9a5d0ba2b1d3406
[INFO] running `Command { std: "docker" "start" "-a" "82d80813648ff9627d90a082060cf35827be2af1ac793cceb9a5d0ba2b1d3406", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling openssl v0.10.63
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]    Compiling syn v2.0.49
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling openssl-sys v0.9.99
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]     Checking crypto-hash v0.3.4
[INFO] [stderr]     Checking rust-blockchain-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `check_difficulty` is never used
[INFO] [stdout]  --> src/block.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn check_difficulty(hash: &Hash, difficulty: u128) -> bool {
[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 `check_difficulty` is never used
[INFO] [stdout]  --> src/block.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn check_difficulty(hash: &Hash, difficulty: u128) -> bool {
[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 8.77s
[INFO] running `Command { std: "docker" "inspect" "82d80813648ff9627d90a082060cf35827be2af1ac793cceb9a5d0ba2b1d3406", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82d80813648ff9627d90a082060cf35827be2af1ac793cceb9a5d0ba2b1d3406", kill_on_drop: false }`
[INFO] [stdout] 82d80813648ff9627d90a082060cf35827be2af1ac793cceb9a5d0ba2b1d3406