[INFO] updating cached repository baxtersa/arrow
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/baxtersa/arrow
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/baxtersa/arrow" "work/ex/beta-1.38-1/sources/1.37.0/gh/baxtersa/arrow"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/baxtersa/arrow'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/baxtersa/arrow" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/baxtersa/arrow"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/baxtersa/arrow'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 83495bc6e246f87eca9ce739ca50ede6b38980b0
[INFO] sha for GitHub repo baxtersa/arrow: 83495bc6e246f87eca9ce739ca50ede6b38980b0
[INFO] validating manifest of baxtersa/arrow 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 baxtersa/arrow 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 baxtersa/arrow
[INFO] finished frobbing baxtersa/arrow
[INFO] frobbed toml for baxtersa/arrow written to work/ex/beta-1.38-1/sources/1.37.0/gh/baxtersa/arrow/Cargo.toml
[INFO] started frobbing baxtersa/arrow
[INFO] finished frobbing baxtersa/arrow
[INFO] frobbed toml for baxtersa/arrow written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/baxtersa/arrow/Cargo.toml
[INFO] crate baxtersa/arrow 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 baxtersa/arrow 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/baxtersa/arrow:/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] 2d6736cc58861e3ab9653df9dea04b1f1365b2e56f8fcd93a2a740cb97b80abc
[INFO] running `"docker" "start" "-a" "2d6736cc58861e3ab9653df9dea04b1f1365b2e56f8fcd93a2a740cb97b80abc"`
[INFO] [stderr]    Compiling arrow v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `arrow::monads::*`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use arrow::monads::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
[INFO] running `"docker" "inspect" "2d6736cc58861e3ab9653df9dea04b1f1365b2e56f8fcd93a2a740cb97b80abc"`
[INFO] running `"docker" "rm" "-f" "2d6736cc58861e3ab9653df9dea04b1f1365b2e56f8fcd93a2a740cb97b80abc"`
[INFO] [stdout] 2d6736cc58861e3ab9653df9dea04b1f1365b2e56f8fcd93a2a740cb97b80abc
[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/baxtersa/arrow:/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] 5bee06ca34406366e5cda988029ad810be0e5e8fc70348f35e87ea220f947240
[INFO] running `"docker" "start" "-a" "5bee06ca34406366e5cda988029ad810be0e5e8fc70348f35e87ea220f947240"`
[INFO] [stderr]    Compiling arrow v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `arrow::monads::*`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use arrow::monads::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `"docker" "inspect" "5bee06ca34406366e5cda988029ad810be0e5e8fc70348f35e87ea220f947240"`
[INFO] running `"docker" "rm" "-f" "5bee06ca34406366e5cda988029ad810be0e5e8fc70348f35e87ea220f947240"`
[INFO] [stdout] 5bee06ca34406366e5cda988029ad810be0e5e8fc70348f35e87ea220f947240
[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/baxtersa/arrow:/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] 738d6b4ad41b9df8ded2e1216ca8423fd9a72fb24af9c4b8ce7b90ca1f60a9e8
[INFO] running `"docker" "start" "-a" "738d6b4ad41b9df8ded2e1216ca8423fd9a72fb24af9c4b8ce7b90ca1f60a9e8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/arrow-921f5cce464b8304
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test monads::monad::option_bind ... ok
[INFO] [stdout] test monads::monad::option_ret ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/arrow-03103c74253e6019
[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 arrow
[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" "738d6b4ad41b9df8ded2e1216ca8423fd9a72fb24af9c4b8ce7b90ca1f60a9e8"`
[INFO] running `"docker" "rm" "-f" "738d6b4ad41b9df8ded2e1216ca8423fd9a72fb24af9c4b8ce7b90ca1f60a9e8"`
[INFO] [stdout] 738d6b4ad41b9df8ded2e1216ca8423fd9a72fb24af9c4b8ce7b90ca1f60a9e8