[INFO] updating cached repository Ethan826/connect-four
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Ethan826/connect-four
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Ethan826/connect-four" "work/ex/beta-1.37-6/sources/1.36.0/gh/Ethan826/connect-four"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Ethan826/connect-four'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Ethan826/connect-four" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ethan826/connect-four"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ethan826/connect-four'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e7b9d0c6cb18e9fadd618d65080e310494e567c5
[INFO] sha for GitHub repo Ethan826/connect-four: e7b9d0c6cb18e9fadd618d65080e310494e567c5
[INFO] validating manifest of Ethan826/connect-four 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 Ethan826/connect-four 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 Ethan826/connect-four
[INFO] finished frobbing Ethan826/connect-four
[INFO] frobbed toml for Ethan826/connect-four written to work/ex/beta-1.37-6/sources/1.36.0/gh/Ethan826/connect-four/Cargo.toml
[INFO] started frobbing Ethan826/connect-four
[INFO] finished frobbing Ethan826/connect-four
[INFO] frobbed toml for Ethan826/connect-four written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ethan826/connect-four/Cargo.toml
[INFO] crate Ethan826/connect-four 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 Ethan826/connect-four against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ethan826/connect-four:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 0fabe20c39696a95e166303667f0beabb8f63f5be8a1ff9cde3a3a8a889adffb
[INFO] running `"docker" "start" "-a" "0fabe20c39696a95e166303667f0beabb8f63f5be8a1ff9cde3a3a8a889adffb"`
[INFO] [stderr]    Compiling connect_four v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `longest_runs`
[INFO] [stderr]    --> src/game.rs:128:37
[INFO] [stderr]     |
[INFO] [stderr] 128 |     fn score_incomplete_game(&self, longest_runs: &LongestRuns) -> isize {
[INFO] [stderr]     |                                     ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_longest_runs`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.12s
[INFO] running `"docker" "inspect" "0fabe20c39696a95e166303667f0beabb8f63f5be8a1ff9cde3a3a8a889adffb"`
[INFO] running `"docker" "rm" "-f" "0fabe20c39696a95e166303667f0beabb8f63f5be8a1ff9cde3a3a8a889adffb"`
[INFO] [stdout] 0fabe20c39696a95e166303667f0beabb8f63f5be8a1ff9cde3a3a8a889adffb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ethan826/connect-four:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 330555f8c96d1dd71e57f8a446cd790f462eb6faef09b2088b8b45259a9f42e7
[INFO] running `"docker" "start" "-a" "330555f8c96d1dd71e57f8a446cd790f462eb6faef09b2088b8b45259a9f42e7"`
[INFO] [stderr]    Compiling connect_four v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `longest_runs`
[INFO] [stderr]    --> src/game.rs:128:37
[INFO] [stderr]     |
[INFO] [stderr] 128 |     fn score_incomplete_game(&self, longest_runs: &LongestRuns) -> isize {
[INFO] [stderr]     |                                     ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_longest_runs`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.43s
[INFO] running `"docker" "inspect" "330555f8c96d1dd71e57f8a446cd790f462eb6faef09b2088b8b45259a9f42e7"`
[INFO] running `"docker" "rm" "-f" "330555f8c96d1dd71e57f8a446cd790f462eb6faef09b2088b8b45259a9f42e7"`
[INFO] [stdout] 330555f8c96d1dd71e57f8a446cd790f462eb6faef09b2088b8b45259a9f42e7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Ethan826/connect-four:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 6d30bae5126d87d717104c7b6d06581ff7c3b432fcb4fa18fe024c437a4e96a2
[INFO] running `"docker" "start" "-a" "6d30bae5126d87d717104c7b6d06581ff7c3b432fcb4fa18fe024c437a4e96a2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/connect_four-ad64aa820a042e1f
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test game::test_new_empty_game_valid ... ok
[INFO] [stdout] test game::test_new_empty_game_invalid ... ok
[INFO] [stderr]      Running /opt/crater/target/debug/deps/connect_four-9bc1c708becd9566
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests connect_four
[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] [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" "6d30bae5126d87d717104c7b6d06581ff7c3b432fcb4fa18fe024c437a4e96a2"`
[INFO] running `"docker" "rm" "-f" "6d30bae5126d87d717104c7b6d06581ff7c3b432fcb4fa18fe024c437a4e96a2"`
[INFO] [stdout] 6d30bae5126d87d717104c7b6d06581ff7c3b432fcb4fa18fe024c437a4e96a2