[INFO] fetching crate currency 0.4.0...
[INFO] checking currency-0.4.0 against try#353a0a223066e9f46a1d935f2271a26c3c5002bb for pr-75180
[INFO] extracting crate currency 0.4.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate currency 0.4.0 on toolchain 353a0a223066e9f46a1d935f2271a26c3c5002bb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate currency 0.4.0
[INFO] finished tweaking crates.io crate currency 0.4.0
[INFO] tweaked toml for crates.io crate currency 0.4.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "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" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5e04507b42d489b7639e1332e3ab1b41365b4e98e914a6c4f0a6c5e8f5b97ec8
[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" "5e04507b42d489b7639e1332e3ab1b41365b4e98e914a6c4f0a6c5e8f5b97ec8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e04507b42d489b7639e1332e3ab1b41365b4e98e914a6c4f0a6c5e8f5b97ec8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e04507b42d489b7639e1332e3ab1b41365b4e98e914a6c4f0a6c5e8f5b97ec8", kill_on_drop: false }`
[INFO] [stdout] 5e04507b42d489b7639e1332e3ab1b41365b4e98e914a6c4f0a6c5e8f5b97ec8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "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] ffc488b21c2bd37cd8e056a2eeb95de4a2994ec2c1ceffa629ee42768ac822f8
[INFO] running `Command { std: "docker" "start" "-a" "ffc488b21c2bd37cd8e056a2eeb95de4a2994ec2c1ceffa629ee42768ac822f8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking currency v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BigUint` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:85:27
[INFO] [stdout]    |
[INFO] [stdout] 46 | use num::bigint::{BigInt, BigUint, Sign};
[INFO] [stdout]    |                           ------- the item `BigUint` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 85 |         use num::bigint::{BigUint, Sign};
[INFO] [stdout]    |                           ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sign` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:85:36
[INFO] [stdout]    |
[INFO] [stdout] 46 | use num::bigint::{BigInt, BigUint, Sign};
[INFO] [stdout]    |                                    ---- the item `Sign` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 85 |         use num::bigint::{BigUint, Sign};
[INFO] [stdout]    |                                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BigUint` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:85:27
[INFO] [stdout]    |
[INFO] [stdout] 46 | use num::bigint::{BigInt, BigUint, Sign};
[INFO] [stdout]    |                           ------- the item `BigUint` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 85 |         use num::bigint::{BigUint, Sign};
[INFO] [stdout]    |                           ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sign` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:85:36
[INFO] [stdout]    |
[INFO] [stdout] 46 | use num::bigint::{BigInt, BigUint, Sign};
[INFO] [stdout]    |                                    ---- the item `Sign` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 85 |         use num::bigint::{BigUint, Sign};
[INFO] [stdout]    |                                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]    --> src/lib.rs:752:13
[INFO] [stdout]     |
[INFO] [stdout] 752 |         use std::str::FromStr;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.80s
[INFO] running `Command { std: "docker" "inspect" "ffc488b21c2bd37cd8e056a2eeb95de4a2994ec2c1ceffa629ee42768ac822f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffc488b21c2bd37cd8e056a2eeb95de4a2994ec2c1ceffa629ee42768ac822f8", kill_on_drop: false }`
[INFO] [stdout] ffc488b21c2bd37cd8e056a2eeb95de4a2994ec2c1ceffa629ee42768ac822f8