[INFO] crate hamster_wheel 0.2.1 is already in cache
[INFO] checking hamster_wheel-0.2.1 against master#2da942f32802c8233a09744024dfbc34431adf65 for pr-66963
[INFO] extracting crate hamster_wheel 0.2.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate hamster_wheel 0.2.1 on toolchain 2da942f32802c8233a09744024dfbc34431adf65
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2da942f32802c8233a09744024dfbc34431adf65" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate hamster_wheel 0.2.1
[INFO] finished tweaking crates.io crate hamster_wheel 0.2.1
[INFO] tweaked toml for crates.io crate hamster_wheel 0.2.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2da942f32802c8233a09744024dfbc34431adf65" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2da942f32802c8233a09744024dfbc34431adf65" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+2da942f32802c8233a09744024dfbc34431adf65" "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] 7d17b2e1fb6ecc4443c186e427085fa1954c52892a9020bb6de4fdd0e6da73f9
[INFO] running `"docker" "start" "-a" "7d17b2e1fb6ecc4443c186e427085fa1954c52892a9020bb6de4fdd0e6da73f9"`
[INFO] [stderr]    Compiling rustc-hash v1.0.1
[INFO] [stderr]     Checking publicsuffix v1.5.4
[INFO] [stderr]     Checking bstr v0.2.8
[INFO] [stderr]    Compiling logos-derive v0.10.0-rc2
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking reqwest v0.9.22
[INFO] [stderr]     Checking logos v0.10.0-rc2
[INFO] [stderr]     Checking hamster_wheel v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/interpreter/importer.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |         let mut joined;
[INFO] [stderr]    |             ----^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/interpreter/importer.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |         let mut joined;
[INFO] [stderr]    |             ----^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.21s
[INFO] running `"docker" "inspect" "7d17b2e1fb6ecc4443c186e427085fa1954c52892a9020bb6de4fdd0e6da73f9"`
[INFO] running `"docker" "rm" "-f" "7d17b2e1fb6ecc4443c186e427085fa1954c52892a9020bb6de4fdd0e6da73f9"`
[INFO] [stdout] 7d17b2e1fb6ecc4443c186e427085fa1954c52892a9020bb6de4fdd0e6da73f9