[INFO] updating cached repository Mancomb/four_in_a_row
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Mancomb/four_in_a_row
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Mancomb/four_in_a_row" "work/ex/beta-1.37-6/sources/1.36.0/gh/Mancomb/four_in_a_row"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Mancomb/four_in_a_row'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Mancomb/four_in_a_row" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Mancomb/four_in_a_row"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Mancomb/four_in_a_row'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 427c187f7c102753a490b6d0a96b1fa140787c9c
[INFO] sha for GitHub repo Mancomb/four_in_a_row: 427c187f7c102753a490b6d0a96b1fa140787c9c
[INFO] validating manifest of Mancomb/four_in_a_row 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 Mancomb/four_in_a_row 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 Mancomb/four_in_a_row
[INFO] finished frobbing Mancomb/four_in_a_row
[INFO] frobbed toml for Mancomb/four_in_a_row written to work/ex/beta-1.37-6/sources/1.36.0/gh/Mancomb/four_in_a_row/Cargo.toml
[INFO] started frobbing Mancomb/four_in_a_row
[INFO] finished frobbing Mancomb/four_in_a_row
[INFO] frobbed toml for Mancomb/four_in_a_row written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Mancomb/four_in_a_row/Cargo.toml
[INFO] crate Mancomb/four_in_a_row 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 Mancomb/four_in_a_row 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/Mancomb/four_in_a_row:/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] 70a569374e27ef1fdc1883b071e96c98fd09c243b087eb66fa40c06117a593b6
[INFO] running `"docker" "start" "-a" "70a569374e27ef1fdc1883b071e96c98fd09c243b087eb66fa40c06117a593b6"`
[INFO] [stderr]    Compiling mcts v0.2.0
[INFO] [stderr]    Compiling four_in_a_row v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `random::Random`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use random::Random;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Random`
[INFO] [stderr]  --> src/random.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub struct Random;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/connect_four.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 write!(out, "|{}", c);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/connect_four.rs:58:13
[INFO] [stderr]    |
[INFO] [stderr] 58 |             writeln!(out, "|");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/connect_four.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |         writeln!(out, "---------------\n 0 1 2 3 4 5 6");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.94s
[INFO] running `"docker" "inspect" "70a569374e27ef1fdc1883b071e96c98fd09c243b087eb66fa40c06117a593b6"`
[INFO] running `"docker" "rm" "-f" "70a569374e27ef1fdc1883b071e96c98fd09c243b087eb66fa40c06117a593b6"`
[INFO] [stdout] 70a569374e27ef1fdc1883b071e96c98fd09c243b087eb66fa40c06117a593b6
[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/Mancomb/four_in_a_row:/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] 0027df74a00b43623c7c45084bf8d9f9328b071f051547280a5b51c917b9f1e8
[INFO] running `"docker" "start" "-a" "0027df74a00b43623c7c45084bf8d9f9328b071f051547280a5b51c917b9f1e8"`
[INFO] [stderr]    Compiling four_in_a_row v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `random::Random`
[INFO] [stderr]   --> src/main.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use random::Random;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Random`
[INFO] [stderr]  --> src/random.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub struct Random;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/connect_four.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 write!(out, "|{}", c);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/connect_four.rs:58:13
[INFO] [stderr]    |
[INFO] [stderr] 58 |             writeln!(out, "|");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/connect_four.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |         writeln!(out, "---------------\n 0 1 2 3 4 5 6");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.18s
[INFO] running `"docker" "inspect" "0027df74a00b43623c7c45084bf8d9f9328b071f051547280a5b51c917b9f1e8"`
[INFO] running `"docker" "rm" "-f" "0027df74a00b43623c7c45084bf8d9f9328b071f051547280a5b51c917b9f1e8"`
[INFO] [stdout] 0027df74a00b43623c7c45084bf8d9f9328b071f051547280a5b51c917b9f1e8
[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/Mancomb/four_in_a_row:/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] 5802d50dcee47a109086cec5d77429f168239bb6780beca91a55f40694e0520e
[INFO] running `"docker" "start" "-a" "5802d50dcee47a109086cec5d77429f168239bb6780beca91a55f40694e0520e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/four_in_a_row-418edad06723e44b
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test bitboard::test::vertical ... ok
[INFO] [stdout] test bitboard::test::horizontal ... ok
[INFO] [stdout] test bitboard::test::diagonal2 ... ok
[INFO] [stdout] test bitboard::test::place_stones ... ok
[INFO] [stdout] test bitboard::test::diagonal1 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "5802d50dcee47a109086cec5d77429f168239bb6780beca91a55f40694e0520e"`
[INFO] running `"docker" "rm" "-f" "5802d50dcee47a109086cec5d77429f168239bb6780beca91a55f40694e0520e"`
[INFO] [stdout] 5802d50dcee47a109086cec5d77429f168239bb6780beca91a55f40694e0520e