[INFO] updating cached repository joyent/rust-quickcheck-helpers
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/joyent/rust-quickcheck-helpers
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/joyent/rust-quickcheck-helpers" "work/ex/beta-1.38-1/sources/1.37.0/gh/joyent/rust-quickcheck-helpers"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/joyent/rust-quickcheck-helpers'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/joyent/rust-quickcheck-helpers" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/joyent/rust-quickcheck-helpers"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/joyent/rust-quickcheck-helpers'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 52a286ced9d285988deab2738a72b73a4ba81dd3
[INFO] sha for GitHub repo joyent/rust-quickcheck-helpers: 52a286ced9d285988deab2738a72b73a4ba81dd3
[INFO] validating manifest of joyent/rust-quickcheck-helpers 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 joyent/rust-quickcheck-helpers 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 joyent/rust-quickcheck-helpers
[INFO] finished frobbing joyent/rust-quickcheck-helpers
[INFO] frobbed toml for joyent/rust-quickcheck-helpers written to work/ex/beta-1.38-1/sources/1.37.0/gh/joyent/rust-quickcheck-helpers/Cargo.toml
[INFO] started frobbing joyent/rust-quickcheck-helpers
[INFO] finished frobbing joyent/rust-quickcheck-helpers
[INFO] frobbed toml for joyent/rust-quickcheck-helpers written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/joyent/rust-quickcheck-helpers/Cargo.toml
[INFO] crate joyent/rust-quickcheck-helpers 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 joyent/rust-quickcheck-helpers 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/joyent/rust-quickcheck-helpers:/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] cce99faa72c1eb337f5c7d08d7c697415bea64a8ffea41e97e62e0b8a8391573
[INFO] running `"docker" "start" "-a" "cce99faa72c1eb337f5c7d08d7c697415bea64a8ffea41e97e62e0b8a8391573"`
[INFO] [stderr]    Compiling log v0.4.7
[INFO] [stderr]    Compiling regex-syntax v0.6.10
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling aho-corasick v0.7.4
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling regex v1.2.0
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling quickcheck v0.8.5
[INFO] [stderr]    Compiling quickcheck_helpers v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.86s
[INFO] running `"docker" "inspect" "cce99faa72c1eb337f5c7d08d7c697415bea64a8ffea41e97e62e0b8a8391573"`
[INFO] running `"docker" "rm" "-f" "cce99faa72c1eb337f5c7d08d7c697415bea64a8ffea41e97e62e0b8a8391573"`
[INFO] [stdout] cce99faa72c1eb337f5c7d08d7c697415bea64a8ffea41e97e62e0b8a8391573
[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/joyent/rust-quickcheck-helpers:/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] 6e9456dd5d6ffa229a8036d92832d0a558f811bedd340ce73abde666c5390fa9
[INFO] running `"docker" "start" "-a" "6e9456dd5d6ffa229a8036d92832d0a558f811bedd340ce73abde666c5390fa9"`
[INFO] [stderr]    Compiling quickcheck_helpers v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `"docker" "inspect" "6e9456dd5d6ffa229a8036d92832d0a558f811bedd340ce73abde666c5390fa9"`
[INFO] running `"docker" "rm" "-f" "6e9456dd5d6ffa229a8036d92832d0a558f811bedd340ce73abde666c5390fa9"`
[INFO] [stdout] 6e9456dd5d6ffa229a8036d92832d0a558f811bedd340ce73abde666c5390fa9
[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/joyent/rust-quickcheck-helpers:/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] 07a7cd6bc9e9785374f91c04dd7b90611e3b5c546737b5e5ec2ed1e9a707f1b2
[INFO] running `"docker" "start" "-a" "07a7cd6bc9e9785374f91c04dd7b90611e3b5c546737b5e5ec2ed1e9a707f1b2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/quickcheck_helpers-c425c1572774124a
[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] [stderr]    Doc-tests quickcheck_helpers
[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" "07a7cd6bc9e9785374f91c04dd7b90611e3b5c546737b5e5ec2ed1e9a707f1b2"`
[INFO] running `"docker" "rm" "-f" "07a7cd6bc9e9785374f91c04dd7b90611e3b5c546737b5e5ec2ed1e9a707f1b2"`
[INFO] [stdout] 07a7cd6bc9e9785374f91c04dd7b90611e3b5c546737b5e5ec2ed1e9a707f1b2