[INFO] updating cached repository pop-os/ubuntu-version
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/pop-os/ubuntu-version
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/pop-os/ubuntu-version" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/pop-os/ubuntu-version"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/pop-os/ubuntu-version'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pop-os/ubuntu-version" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/pop-os/ubuntu-version"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/pop-os/ubuntu-version'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d4a8313ca310b1ef36edf50f975346713f7cf947
[INFO] sha for GitHub repo pop-os/ubuntu-version: d4a8313ca310b1ef36edf50f975346713f7cf947
[INFO] validating manifest of pop-os/ubuntu-version on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pop-os/ubuntu-version on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing pop-os/ubuntu-version
[INFO] finished frobbing pop-os/ubuntu-version
[INFO] frobbed toml for pop-os/ubuntu-version written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/pop-os/ubuntu-version/Cargo.toml
[INFO] started frobbing pop-os/ubuntu-version
[INFO] finished frobbing pop-os/ubuntu-version
[INFO] frobbed toml for pop-os/ubuntu-version written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/pop-os/ubuntu-version/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking pop-os/ubuntu-version against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-1/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/pop-os/ubuntu-version:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 62e20d362b45ae17d383d396e8f1a11f876252d83645c3d7790d866f15f95c14
[INFO] running `"docker" "start" "-a" "62e20d362b45ae17d383d396e8f1a11f876252d83645c3d7790d866f15f95c14"`
[INFO] [stderr]     Checking os-release v0.1.0
[INFO] [stderr]     Checking ubuntu-version v0.1.2 (/opt/crater/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 1.97s
[INFO] running `"docker" "inspect" "62e20d362b45ae17d383d396e8f1a11f876252d83645c3d7790d866f15f95c14"`
[INFO] running `"docker" "rm" "-f" "62e20d362b45ae17d383d396e8f1a11f876252d83645c3d7790d866f15f95c14"`
[INFO] [stdout] 62e20d362b45ae17d383d396e8f1a11f876252d83645c3d7790d866f15f95c14