[INFO] crate ubuntu-version 0.1.4 is already in cache
[INFO] checking ubuntu-version-0.1.4 against master#2da942f32802c8233a09744024dfbc34431adf65 for pr-66963
[INFO] extracting crate ubuntu-version 0.1.4 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate ubuntu-version 0.1.4 on toolchain 2da942f32802c8233a09744024dfbc34431adf65
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2da942f32802c8233a09744024dfbc34431adf65" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ubuntu-version 0.1.4
[INFO] finished tweaking crates.io crate ubuntu-version 0.1.4
[INFO] tweaked toml for crates.io crate ubuntu-version 0.1.4 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] 577903e324c373f6a7b4478a165288c85da6e2b93cfcf14ea223b87b66641820
[INFO] running `"docker" "start" "-a" "577903e324c373f6a7b4478a165288c85da6e2b93cfcf14ea223b87b66641820"`
[INFO] [stderr]     Checking os-release v0.1.0
[INFO] [stderr]    Compiling err-derive v0.1.6
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]     Checking ubuntu-version v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `version`
[INFO] [stderr]  --> examples/example.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let version = "18.04 LTS".parse::<Version>().unwrap();
[INFO] [stderr]   |         ^^^^^^^ help: consider prefixing with an underscore: `_version`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.11s
[INFO] running `"docker" "inspect" "577903e324c373f6a7b4478a165288c85da6e2b93cfcf14ea223b87b66641820"`
[INFO] running `"docker" "rm" "-f" "577903e324c373f6a7b4478a165288c85da6e2b93cfcf14ea223b87b66641820"`
[INFO] [stdout] 577903e324c373f6a7b4478a165288c85da6e2b93cfcf14ea223b87b66641820