[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-1.37-6/sources/1.36.0/gh/pop-os/ubuntu-version"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/pop-os/ubuntu-version'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pop-os/ubuntu-version" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pop-os/ubuntu-version"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pop-os/ubuntu-version on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/gh/pop-os/ubuntu-version/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing pop-os/ubuntu-version against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 0f53c22c4dabf0a81755f57c96b403a058b0176c7c580f063166758d56d257c1
[INFO] running `"docker" "start" "-a" "0f53c22c4dabf0a81755f57c96b403a058b0176c7c580f063166758d56d257c1"`
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling os-release v0.1.0
[INFO] [stderr]    Compiling err-derive v0.1.5
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling ubuntu-version v0.1.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.44s
[INFO] running `"docker" "inspect" "0f53c22c4dabf0a81755f57c96b403a058b0176c7c580f063166758d56d257c1"`
[INFO] running `"docker" "rm" "-f" "0f53c22c4dabf0a81755f57c96b403a058b0176c7c580f063166758d56d257c1"`
[INFO] [stdout] 0f53c22c4dabf0a81755f57c96b403a058b0176c7c580f063166758d56d257c1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 25f8431191d16f00f70c27e19ab0c83bf1ae919dcb8030bc478f37827b3946a1
[INFO] running `"docker" "start" "-a" "25f8431191d16f00f70c27e19ab0c83bf1ae919dcb8030bc478f37827b3946a1"`
[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 1.14s
[INFO] running `"docker" "inspect" "25f8431191d16f00f70c27e19ab0c83bf1ae919dcb8030bc478f37827b3946a1"`
[INFO] running `"docker" "rm" "-f" "25f8431191d16f00f70c27e19ab0c83bf1ae919dcb8030bc478f37827b3946a1"`
[INFO] [stdout] 25f8431191d16f00f70c27e19ab0c83bf1ae919dcb8030bc478f37827b3946a1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] aeac1bf0fa51390d208d48c9cd54b5e67f3403d16689a04c4bfd1dcb599f4c6a
[INFO] running `"docker" "start" "-a" "aeac1bf0fa51390d208d48c9cd54b5e67f3403d16689a04c4bfd1dcb599f4c6a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ubuntu_version-9dc3b2dc663aa108
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test version::tests::lts_check ... ok
[INFO] [stdout] test version::tests::lts_next ... ok
[INFO] [stdout] test version::tests::non_lts_next ... ok
[INFO] [stdout] test version::tests::non_lts_parse ... ok
[INFO] [stdout] test version::tests::lts_parse ... 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" "aeac1bf0fa51390d208d48c9cd54b5e67f3403d16689a04c4bfd1dcb599f4c6a"`
[INFO] running `"docker" "rm" "-f" "aeac1bf0fa51390d208d48c9cd54b5e67f3403d16689a04c4bfd1dcb599f4c6a"`
[INFO] [stdout] aeac1bf0fa51390d208d48c9cd54b5e67f3403d16689a04c4bfd1dcb599f4c6a