[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/beta-1.38-1/sources/1.37.0/gh/pop-os/ubuntu-version"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/pop-os/ubuntu-version'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pop-os/ubuntu-version" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pop-os/ubuntu-version"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pop-os/ubuntu-version on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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/beta-1.38-1/sources/1.37.0/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/beta-1.38-1/sources/beta-2019-08-13/gh/pop-os/ubuntu-version/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing pop-os/ubuntu-version against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 3144b7fbc1881f6d0c4a98e5d2e9921e547455d144046acf15f290bcace5c84f
[INFO] running `"docker" "start" "-a" "3144b7fbc1881f6d0c4a98e5d2e9921e547455d144046acf15f290bcace5c84f"`
[INFO] [stderr]    Compiling os-release v0.1.0
[INFO] [stderr]    Compiling err-derive v0.1.5
[INFO] [stderr]    Compiling ubuntu-version v0.1.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.40s
[INFO] running `"docker" "inspect" "3144b7fbc1881f6d0c4a98e5d2e9921e547455d144046acf15f290bcace5c84f"`
[INFO] running `"docker" "rm" "-f" "3144b7fbc1881f6d0c4a98e5d2e9921e547455d144046acf15f290bcace5c84f"`
[INFO] [stdout] 3144b7fbc1881f6d0c4a98e5d2e9921e547455d144046acf15f290bcace5c84f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] ec355741298ad79594a6001810c3fd7fefc205643fe859ac154f4da7957540a6
[INFO] running `"docker" "start" "-a" "ec355741298ad79594a6001810c3fd7fefc205643fe859ac154f4da7957540a6"`
[INFO] [stderr]    Compiling 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 1.44s
[INFO] running `"docker" "inspect" "ec355741298ad79594a6001810c3fd7fefc205643fe859ac154f4da7957540a6"`
[INFO] running `"docker" "rm" "-f" "ec355741298ad79594a6001810c3fd7fefc205643fe859ac154f4da7957540a6"`
[INFO] [stdout] ec355741298ad79594a6001810c3fd7fefc205643fe859ac154f4da7957540a6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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=warn" "-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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 6ee0f031fb1fec471c1f9cb1ba2644aba062e69433c2f68e37137057e7e99177
[INFO] running `"docker" "start" "-a" "6ee0f031fb1fec471c1f9cb1ba2644aba062e69433c2f68e37137057e7e99177"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ubuntu_version-e413ac5e345ee746
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test version::tests::non_lts_parse ... ok
[INFO] [stdout] test version::tests::non_lts_next ... ok
[INFO] [stdout] test version::tests::lts_parse ... ok
[INFO] [stdout] test version::tests::lts_next ... ok
[INFO] [stdout] test version::tests::lts_check ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ubuntu-version
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "6ee0f031fb1fec471c1f9cb1ba2644aba062e69433c2f68e37137057e7e99177"`
[INFO] running `"docker" "rm" "-f" "6ee0f031fb1fec471c1f9cb1ba2644aba062e69433c2f68e37137057e7e99177"`
[INFO] [stdout] 6ee0f031fb1fec471c1f9cb1ba2644aba062e69433c2f68e37137057e7e99177