[INFO] cloning repository https://github.com/pop-os/ubuntu-version
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pop-os/ubuntu-version" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpop-os%2Fubuntu-version"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpop-os%2Fubuntu-version'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 79d51b8d2d80306e87ec93ef6ccd8089fa653a69
[INFO] checking pop-os/ubuntu-version against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpop-os%2Fubuntu-version" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pop-os/ubuntu-version on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/pop-os/ubuntu-version
[INFO] finished tweaking git repo https://github.com/pop-os/ubuntu-version
[INFO] tweaked toml for git repo https://github.com/pop-os/ubuntu-version written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/pop-os/ubuntu-version already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 84af4a470ea1eace0d07e89e9b5f9fefc48e4564bd501097359104bd129c8a5b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "84af4a470ea1eace0d07e89e9b5f9fefc48e4564bd501097359104bd129c8a5b"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking os-release v0.1.0
[INFO] [stderr]    Compiling err-derive v0.1.5
[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 7.58s
[INFO] running `"docker" "inspect" "84af4a470ea1eace0d07e89e9b5f9fefc48e4564bd501097359104bd129c8a5b"`
[INFO] running `"docker" "rm" "-f" "84af4a470ea1eace0d07e89e9b5f9fefc48e4564bd501097359104bd129c8a5b"`
[INFO] [stdout] 84af4a470ea1eace0d07e89e9b5f9fefc48e4564bd501097359104bd129c8a5b