[INFO] updating cached repository u238/traits_exercise
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/u238/traits_exercise
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/u238/traits_exercise" "work/ex/beta-1.38-1/sources/1.37.0/gh/u238/traits_exercise"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/u238/traits_exercise'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/u238/traits_exercise" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/u238/traits_exercise"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/u238/traits_exercise'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b4d2ec668ba73d8123a0538c766117dbe9238423
[INFO] sha for GitHub repo u238/traits_exercise: b4d2ec668ba73d8123a0538c766117dbe9238423
[INFO] validating manifest of u238/traits_exercise 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 u238/traits_exercise 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 u238/traits_exercise
[INFO] finished frobbing u238/traits_exercise
[INFO] frobbed toml for u238/traits_exercise written to work/ex/beta-1.38-1/sources/1.37.0/gh/u238/traits_exercise/Cargo.toml
[INFO] started frobbing u238/traits_exercise
[INFO] finished frobbing u238/traits_exercise
[INFO] frobbed toml for u238/traits_exercise written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/u238/traits_exercise/Cargo.toml
[INFO] crate u238/traits_exercise already has a lockfile, it will not be regenerated
[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 u238/traits_exercise 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/u238/traits_exercise:/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] 2615feb3ee3ab537e1593e451e05a51d697cf6093b187962659faf477e391acc
[INFO] running `"docker" "start" "-a" "2615feb3ee3ab537e1593e451e05a51d697cf6093b187962659faf477e391acc"`
[INFO] [stderr]    Compiling traits_exercise v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.54s
[INFO] running `"docker" "inspect" "2615feb3ee3ab537e1593e451e05a51d697cf6093b187962659faf477e391acc"`
[INFO] running `"docker" "rm" "-f" "2615feb3ee3ab537e1593e451e05a51d697cf6093b187962659faf477e391acc"`
[INFO] [stdout] 2615feb3ee3ab537e1593e451e05a51d697cf6093b187962659faf477e391acc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/u238/traits_exercise:/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] de94d58538e9a996d031a824c81be7c232e20352f1e6b7c43c3c7be8520c5415
[INFO] running `"docker" "start" "-a" "de94d58538e9a996d031a824c81be7c232e20352f1e6b7c43c3c7be8520c5415"`
[INFO] [stderr]    Compiling traits_exercise v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `"docker" "inspect" "de94d58538e9a996d031a824c81be7c232e20352f1e6b7c43c3c7be8520c5415"`
[INFO] running `"docker" "rm" "-f" "de94d58538e9a996d031a824c81be7c232e20352f1e6b7c43c3c7be8520c5415"`
[INFO] [stdout] de94d58538e9a996d031a824c81be7c232e20352f1e6b7c43c3c7be8520c5415
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/u238/traits_exercise:/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] 027241867eb8ad9f2ddf8d12775ba66c8403a434e39ec37920eb5f38c8090b47
[INFO] running `"docker" "start" "-a" "027241867eb8ad9f2ddf8d12775ba66c8403a434e39ec37920eb5f38c8090b47"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/traits_exercise-b618b23d8ffc7863
[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" "027241867eb8ad9f2ddf8d12775ba66c8403a434e39ec37920eb5f38c8090b47"`
[INFO] running `"docker" "rm" "-f" "027241867eb8ad9f2ddf8d12775ba66c8403a434e39ec37920eb5f38c8090b47"`
[INFO] [stdout] 027241867eb8ad9f2ddf8d12775ba66c8403a434e39ec37920eb5f38c8090b47