[INFO] fetching crate bigint2 0.1.0...
[INFO] checking bigint2-0.1.0 against master#c919f490bbcd2b29b74016101f7ec71aaa24bdbb for pr-79073
[INFO] extracting crate bigint2 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate bigint2 0.1.0 on toolchain c919f490bbcd2b29b74016101f7ec71aaa24bdbb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "read-manifest" "--manifest-path" "Cargo.toml", 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-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d94bee4529a9cba8dd1cd40d6a22a1742d1385d2bc453f7d9ebfc32447d84a47
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d94bee4529a9cba8dd1cd40d6a22a1742d1385d2bc453f7d9ebfc32447d84a47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d94bee4529a9cba8dd1cd40d6a22a1742d1385d2bc453f7d9ebfc32447d84a47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d94bee4529a9cba8dd1cd40d6a22a1742d1385d2bc453f7d9ebfc32447d84a47", kill_on_drop: false }`
[INFO] [stdout] d94bee4529a9cba8dd1cd40d6a22a1742d1385d2bc453f7d9ebfc32447d84a47
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 40b0fef278c70873c3479d239fbe4a75ad8ec1345926b985ecbfb641e8f4f3ab
[INFO] running `Command { std: "docker" "start" "-a" "40b0fef278c70873c3479d239fbe4a75ad8ec1345926b985ecbfb641e8f4f3ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling heapsize v0.3.9
[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 3.10s
[INFO] running `Command { std: "docker" "inspect" "40b0fef278c70873c3479d239fbe4a75ad8ec1345926b985ecbfb641e8f4f3ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40b0fef278c70873c3479d239fbe4a75ad8ec1345926b985ecbfb641e8f4f3ab", kill_on_drop: false }`
[INFO] [stdout] 40b0fef278c70873c3479d239fbe4a75ad8ec1345926b985ecbfb641e8f4f3ab