[INFO] updating cached repository zygomorphic/rust-exercise
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/zygomorphic/rust-exercise
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/zygomorphic/rust-exercise" "work/ex/beta-1.38-1/sources/1.37.0/gh/zygomorphic/rust-exercise"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/zygomorphic/rust-exercise'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/zygomorphic/rust-exercise" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zygomorphic/rust-exercise"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zygomorphic/rust-exercise'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 37754c5416126d7847f8862752cbd31be756d913
[INFO] sha for GitHub repo zygomorphic/rust-exercise: 37754c5416126d7847f8862752cbd31be756d913
[INFO] validating manifest of zygomorphic/rust-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 zygomorphic/rust-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 zygomorphic/rust-exercise
[INFO] finished frobbing zygomorphic/rust-exercise
[INFO] frobbed toml for zygomorphic/rust-exercise written to work/ex/beta-1.38-1/sources/1.37.0/gh/zygomorphic/rust-exercise/Cargo.toml
[INFO] started frobbing zygomorphic/rust-exercise
[INFO] finished frobbing zygomorphic/rust-exercise
[INFO] frobbed toml for zygomorphic/rust-exercise written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zygomorphic/rust-exercise/Cargo.toml
[INFO] crate zygomorphic/rust-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 zygomorphic/rust-exercise against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zygomorphic/rust-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] f8f72890ab40f5c5e0e5f3d47df9c1c2da172f2e539cb57c1f115e9a64123f82
[INFO] running `"docker" "start" "-a" "f8f72890ab40f5c5e0e5f3d47df9c1c2da172f2e539cb57c1f115e9a64123f82"`
[INFO] [stderr]    Compiling rust-exercise v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "f8f72890ab40f5c5e0e5f3d47df9c1c2da172f2e539cb57c1f115e9a64123f82"`
[INFO] running `"docker" "rm" "-f" "f8f72890ab40f5c5e0e5f3d47df9c1c2da172f2e539cb57c1f115e9a64123f82"`
[INFO] [stdout] f8f72890ab40f5c5e0e5f3d47df9c1c2da172f2e539cb57c1f115e9a64123f82
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zygomorphic/rust-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] efb6cba418c848817ce57f394ff23c6cbe8726304cb58b57eaccf9dc6df4ebe0
[INFO] running `"docker" "start" "-a" "efb6cba418c848817ce57f394ff23c6cbe8726304cb58b57eaccf9dc6df4ebe0"`
[INFO] [stderr]    Compiling rust-exercise v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `"docker" "inspect" "efb6cba418c848817ce57f394ff23c6cbe8726304cb58b57eaccf9dc6df4ebe0"`
[INFO] running `"docker" "rm" "-f" "efb6cba418c848817ce57f394ff23c6cbe8726304cb58b57eaccf9dc6df4ebe0"`
[INFO] [stdout] efb6cba418c848817ce57f394ff23c6cbe8726304cb58b57eaccf9dc6df4ebe0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/zygomorphic/rust-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 6d5a00c3058448e874e7d1e08e3682f35663db7a8fef766565a2597648bf983b
[INFO] running `"docker" "start" "-a" "6d5a00c3058448e874e7d1e08e3682f35663db7a8fef766565a2597648bf983b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_exercise-ce47879ed0461767
[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" "6d5a00c3058448e874e7d1e08e3682f35663db7a8fef766565a2597648bf983b"`
[INFO] running `"docker" "rm" "-f" "6d5a00c3058448e874e7d1e08e3682f35663db7a8fef766565a2597648bf983b"`
[INFO] [stdout] 6d5a00c3058448e874e7d1e08e3682f35663db7a8fef766565a2597648bf983b