[INFO] crate shuffle 0.1.3 is already in cache
[INFO] checking shuffle-0.1.3 against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] extracting crate shuffle 0.1.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate shuffle 0.1.3 on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate shuffle 0.1.3
[INFO] finished tweaking crates.io crate shuffle 0.1.3
[INFO] tweaked toml for crates.io crate shuffle 0.1.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fe880b2e257176bfd7c9afe30f489bb19fc266fba40867d51f1a2d1f8babee15
[INFO] running `"docker" "start" "-a" "fe880b2e257176bfd7c9afe30f489bb19fc266fba40867d51f1a2d1f8babee15"`
[INFO] [stderr]     Checking bitvec v0.15.2
[INFO] [stderr]     Checking shuffle v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `rand::prelude`
[INFO] [stderr]    --> src/irs.rs:209:9
[INFO] [stderr]     |
[INFO] [stderr] 209 |     use rand::prelude::*;
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/irs.rs:218:9
[INFO] [stderr]     |
[INFO] [stderr] 218 |         irs.shuffle(&mut target, &mut rng);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.58s
[INFO] running `"docker" "inspect" "fe880b2e257176bfd7c9afe30f489bb19fc266fba40867d51f1a2d1f8babee15"`
[INFO] running `"docker" "rm" "-f" "fe880b2e257176bfd7c9afe30f489bb19fc266fba40867d51f1a2d1f8babee15"`
[INFO] [stdout] fe880b2e257176bfd7c9afe30f489bb19fc266fba40867d51f1a2d1f8babee15