[INFO] updating cached repository garyemerson/circular_walk
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/garyemerson/circular_walk
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/garyemerson/circular_walk" "work/ex/beta-1.37-6/sources/1.36.0/gh/garyemerson/circular_walk"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/garyemerson/circular_walk'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/garyemerson/circular_walk" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/garyemerson/circular_walk"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/garyemerson/circular_walk'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0815ede4471340cf97ed3207bcd4d5b3c09c6e62
[INFO] sha for GitHub repo garyemerson/circular_walk: 0815ede4471340cf97ed3207bcd4d5b3c09c6e62
[INFO] validating manifest of garyemerson/circular_walk on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of garyemerson/circular_walk on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing garyemerson/circular_walk
[INFO] finished frobbing garyemerson/circular_walk
[INFO] frobbed toml for garyemerson/circular_walk written to work/ex/beta-1.37-6/sources/1.36.0/gh/garyemerson/circular_walk/Cargo.toml
[INFO] started frobbing garyemerson/circular_walk
[INFO] finished frobbing garyemerson/circular_walk
[INFO] frobbed toml for garyemerson/circular_walk written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/garyemerson/circular_walk/Cargo.toml
[INFO] crate garyemerson/circular_walk already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing garyemerson/circular_walk against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/garyemerson/circular_walk:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 2b136642ccfe6f2e6e2ab284cd172a2f5506a99da2692366ab1b34ad4e7fde62
[INFO] running `"docker" "start" "-a" "2b136642ccfe6f2e6e2ab284cd172a2f5506a99da2692366ab1b34ad4e7fde62"`
[INFO] [stderr]    Compiling circular_walk v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around method argument
[INFO] [stderr]   --> src/main.rs:79:35
[INFO] [stderr]    |
[INFO] [stderr] 79 |         Box::new((start..n).chain((0..(end + 1))))
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/main.rs:81:18
[INFO] [stderr]    |
[INFO] [stderr] 81 |         Box::new((start..(end + 1)))
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "2b136642ccfe6f2e6e2ab284cd172a2f5506a99da2692366ab1b34ad4e7fde62"`
[INFO] running `"docker" "rm" "-f" "2b136642ccfe6f2e6e2ab284cd172a2f5506a99da2692366ab1b34ad4e7fde62"`
[INFO] [stdout] 2b136642ccfe6f2e6e2ab284cd172a2f5506a99da2692366ab1b34ad4e7fde62
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/garyemerson/circular_walk:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2eca160e6a48ccff4d19a6d32e8257af9146949657195086dab99c2b00df70ee
[INFO] running `"docker" "start" "-a" "2eca160e6a48ccff4d19a6d32e8257af9146949657195086dab99c2b00df70ee"`
[INFO] [stderr]    Compiling circular_walk v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around method argument
[INFO] [stderr]   --> src/main.rs:79:35
[INFO] [stderr]    |
[INFO] [stderr] 79 |         Box::new((start..n).chain((0..(end + 1))))
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/main.rs:81:18
[INFO] [stderr]    |
[INFO] [stderr] 81 |         Box::new((start..(end + 1)))
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `"docker" "inspect" "2eca160e6a48ccff4d19a6d32e8257af9146949657195086dab99c2b00df70ee"`
[INFO] running `"docker" "rm" "-f" "2eca160e6a48ccff4d19a6d32e8257af9146949657195086dab99c2b00df70ee"`
[INFO] [stdout] 2eca160e6a48ccff4d19a6d32e8257af9146949657195086dab99c2b00df70ee
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/garyemerson/circular_walk:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] ac1b5a666ba4185d691c46e0c632d8ca8ae94559954e98960bbf4c804965f2f1
[INFO] running `"docker" "start" "-a" "ac1b5a666ba4185d691c46e0c632d8ca8ae94559954e98960bbf4c804965f2f1"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/circular_walk-a08eb55384f68bf2
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test back_and_forth ... ok
[INFO] [stdout] test no_path ... ok
[INFO] [stdout] test no_path2 ... ok
[INFO] [stdout] test alread_there ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "ac1b5a666ba4185d691c46e0c632d8ca8ae94559954e98960bbf4c804965f2f1"`
[INFO] running `"docker" "rm" "-f" "ac1b5a666ba4185d691c46e0c632d8ca8ae94559954e98960bbf4c804965f2f1"`
[INFO] [stdout] ac1b5a666ba4185d691c46e0c632d8ca8ae94559954e98960bbf4c804965f2f1