[INFO] updating cached repository data-pup/cargo-metadata-exercise
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/data-pup/cargo-metadata-exercise
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/data-pup/cargo-metadata-exercise" "work/ex/beta-1.38-1/sources/1.37.0/gh/data-pup/cargo-metadata-exercise"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/data-pup/cargo-metadata-exercise'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/data-pup/cargo-metadata-exercise" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/data-pup/cargo-metadata-exercise"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/data-pup/cargo-metadata-exercise'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 756fc3afe4e803d5bfd37de7d60ba1d616657ede
[INFO] sha for GitHub repo data-pup/cargo-metadata-exercise: 756fc3afe4e803d5bfd37de7d60ba1d616657ede
[INFO] validating manifest of data-pup/cargo-metadata-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 data-pup/cargo-metadata-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 data-pup/cargo-metadata-exercise
[INFO] finished frobbing data-pup/cargo-metadata-exercise
[INFO] frobbed toml for data-pup/cargo-metadata-exercise written to work/ex/beta-1.38-1/sources/1.37.0/gh/data-pup/cargo-metadata-exercise/Cargo.toml
[INFO] started frobbing data-pup/cargo-metadata-exercise
[INFO] finished frobbing data-pup/cargo-metadata-exercise
[INFO] frobbed toml for data-pup/cargo-metadata-exercise written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/data-pup/cargo-metadata-exercise/Cargo.toml
[INFO] crate data-pup/cargo-metadata-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 data-pup/cargo-metadata-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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/data-pup/cargo-metadata-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] 957b21d6cd22be96c82520aeaf0c16d608e51e57f057e3fa20c680a3e4a7c69b
[INFO] running `"docker" "start" "-a" "957b21d6cd22be96c82520aeaf0c16d608e51e57f057e3fa20c680a3e4a7c69b"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.17
[INFO] [stderr]    Compiling serde v1.0.76
[INFO] [stderr]    Compiling error-chain v0.12.0
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling serde_derive v1.0.76
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling serde_json v1.0.26
[INFO] [stderr]    Compiling toml v0.4.6
[INFO] [stderr]    Compiling cargo_metadata v0.6.0
[INFO] [stderr]    Compiling cargo-metadata-ex v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 46.49s
[INFO] running `"docker" "inspect" "957b21d6cd22be96c82520aeaf0c16d608e51e57f057e3fa20c680a3e4a7c69b"`
[INFO] running `"docker" "rm" "-f" "957b21d6cd22be96c82520aeaf0c16d608e51e57f057e3fa20c680a3e4a7c69b"`
[INFO] [stdout] 957b21d6cd22be96c82520aeaf0c16d608e51e57f057e3fa20c680a3e4a7c69b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/data-pup/cargo-metadata-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] 04252a8ff78cc2191ce0ab6f25e4c3f0a4e0914169943637bd76f41d95180f65
[INFO] running `"docker" "start" "-a" "04252a8ff78cc2191ce0ab6f25e4c3f0a4e0914169943637bd76f41d95180f65"`
[INFO] [stderr]    Compiling cargo-metadata-ex v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `"docker" "inspect" "04252a8ff78cc2191ce0ab6f25e4c3f0a4e0914169943637bd76f41d95180f65"`
[INFO] running `"docker" "rm" "-f" "04252a8ff78cc2191ce0ab6f25e4c3f0a4e0914169943637bd76f41d95180f65"`
[INFO] [stdout] 04252a8ff78cc2191ce0ab6f25e4c3f0a4e0914169943637bd76f41d95180f65
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/data-pup/cargo-metadata-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] eb7569bbc3491f8aa9bf2c61217c2d679afb38e1e4c35688f5af1fa7de1ebf81
[INFO] running `"docker" "start" "-a" "eb7569bbc3491f8aa9bf2c61217c2d679afb38e1e4c35688f5af1fa7de1ebf81"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cargo_metadata_ex-235ab7fc22848fa2
[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" "eb7569bbc3491f8aa9bf2c61217c2d679afb38e1e4c35688f5af1fa7de1ebf81"`
[INFO] running `"docker" "rm" "-f" "eb7569bbc3491f8aa9bf2c61217c2d679afb38e1e4c35688f5af1fa7de1ebf81"`
[INFO] [stdout] eb7569bbc3491f8aa9bf2c61217c2d679afb38e1e4c35688f5af1fa7de1ebf81