[INFO] updating cached repository juanibiapina/collatz-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/juanibiapina/collatz-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/juanibiapina/collatz-rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/juanibiapina/collatz-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/juanibiapina/collatz-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/juanibiapina/collatz-rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/juanibiapina/collatz-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/juanibiapina/collatz-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3cf388bca8db8abbe02bc0f726dad0a6e9397605
[INFO] sha for GitHub repo juanibiapina/collatz-rs: 3cf388bca8db8abbe02bc0f726dad0a6e9397605
[INFO] validating manifest of juanibiapina/collatz-rs 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 juanibiapina/collatz-rs 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 juanibiapina/collatz-rs
[INFO] finished frobbing juanibiapina/collatz-rs
[INFO] frobbed toml for juanibiapina/collatz-rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/juanibiapina/collatz-rs/Cargo.toml
[INFO] started frobbing juanibiapina/collatz-rs
[INFO] finished frobbing juanibiapina/collatz-rs
[INFO] frobbed toml for juanibiapina/collatz-rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/juanibiapina/collatz-rs/Cargo.toml
[INFO] crate juanibiapina/collatz-rs 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 juanibiapina/collatz-rs 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/juanibiapina/collatz-rs:/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] 7c0886aa4ddd5433c42e222b180a141a34c1611de76bd1c311ec030116521f80
[INFO] running `"docker" "start" "-a" "7c0886aa4ddd5433c42e222b180a141a34c1611de76bd1c311ec030116521f80"`
[INFO] [stderr]    Compiling collatz-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `"docker" "inspect" "7c0886aa4ddd5433c42e222b180a141a34c1611de76bd1c311ec030116521f80"`
[INFO] running `"docker" "rm" "-f" "7c0886aa4ddd5433c42e222b180a141a34c1611de76bd1c311ec030116521f80"`
[INFO] [stdout] 7c0886aa4ddd5433c42e222b180a141a34c1611de76bd1c311ec030116521f80
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/juanibiapina/collatz-rs:/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] 67e59f71208a6bd837aa13a5c4d0d03d9adaf2b6ce70af4170420c4ff08e708c
[INFO] running `"docker" "start" "-a" "67e59f71208a6bd837aa13a5c4d0d03d9adaf2b6ce70af4170420c4ff08e708c"`
[INFO] [stderr]    Compiling collatz-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "67e59f71208a6bd837aa13a5c4d0d03d9adaf2b6ce70af4170420c4ff08e708c"`
[INFO] running `"docker" "rm" "-f" "67e59f71208a6bd837aa13a5c4d0d03d9adaf2b6ce70af4170420c4ff08e708c"`
[INFO] [stdout] 67e59f71208a6bd837aa13a5c4d0d03d9adaf2b6ce70af4170420c4ff08e708c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/juanibiapina/collatz-rs:/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] 68a53b2fa5be26d3979bd53a6e1f5107b6bee66c6a236c9be1cf053cb2d4a402
[INFO] running `"docker" "start" "-a" "68a53b2fa5be26d3979bd53a6e1f5107b6bee66c6a236c9be1cf053cb2d4a402"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/collatz_rs-52bc3ef0c26f6938
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::test_heilstone_sequence_size ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "68a53b2fa5be26d3979bd53a6e1f5107b6bee66c6a236c9be1cf053cb2d4a402"`
[INFO] running `"docker" "rm" "-f" "68a53b2fa5be26d3979bd53a6e1f5107b6bee66c6a236c9be1cf053cb2d4a402"`
[INFO] [stdout] 68a53b2fa5be26d3979bd53a6e1f5107b6bee66c6a236c9be1cf053cb2d4a402