[INFO] fetching crate bigint2 0.1.0...
[INFO] checking bigint2-0.1.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate bigint2 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate bigint2 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bigint2 0.1.0
[INFO] finished tweaking crates.io crate bigint2 0.1.0
[INFO] tweaked toml for crates.io crate bigint2 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded elastic-array v0.7.0
[INFO] [stderr]   Downloaded heapsize v0.3.9
[INFO] [stderr]   Downloaded rlp2 v0.2.0
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0bde31a91ec0cdceab86651a32778f74b6c98f7cc58e45c5e52b8de399242da9
[INFO] running `Command { std: "docker" "start" "-a" "0bde31a91ec0cdceab86651a32778f74b6c98f7cc58e45c5e52b8de399242da9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0bde31a91ec0cdceab86651a32778f74b6c98f7cc58e45c5e52b8de399242da9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bde31a91ec0cdceab86651a32778f74b6c98f7cc58e45c5e52b8de399242da9", kill_on_drop: false }`
[INFO] [stdout] 0bde31a91ec0cdceab86651a32778f74b6c98f7cc58e45c5e52b8de399242da9
[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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30f79b9921ca6987f1d46222edebfac60f7ad2bef26abc9651d515b8c8184ea3
[INFO] running `Command { std: "docker" "start" "-a" "30f79b9921ca6987f1d46222edebfac60f7ad2bef26abc9651d515b8c8184ea3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling heapsize v0.3.9
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking elastic-array v0.7.0
[INFO] [stderr]     Checking rlp2 v0.2.0
[INFO] [stderr]     Checking bigint2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `ZERO_BIG_DIGIT`
[INFO] [stdout]   --> src/algorithms.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub const ZERO_BIG_DIGIT: BigDigit = 0;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `to_doublebigdigit`
[INFO] [stdout]   --> src/algorithms.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn to_doublebigdigit(hi: BigDigit, lo: BigDigit) -> DoubleBigDigit {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `ZERO_BIG_DIGIT`
[INFO] [stdout]   --> src/algorithms.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub const ZERO_BIG_DIGIT: BigDigit = 0;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `to_doublebigdigit`
[INFO] [stdout]   --> src/algorithms.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn to_doublebigdigit(hi: BigDigit, lo: BigDigit) -> DoubleBigDigit {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.59s
[INFO] running `Command { std: "docker" "inspect" "30f79b9921ca6987f1d46222edebfac60f7ad2bef26abc9651d515b8c8184ea3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30f79b9921ca6987f1d46222edebfac60f7ad2bef26abc9651d515b8c8184ea3", kill_on_drop: false }`
[INFO] [stdout] 30f79b9921ca6987f1d46222edebfac60f7ad2bef26abc9651d515b8c8184ea3
