[INFO] updating cached repository schulke-214/connect-four
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/schulke-214/connect-four
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/schulke-214/connect-four" "work/ex/beta-1.38-1/sources/1.37.0/gh/schulke-214/connect-four"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/schulke-214/connect-four'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/schulke-214/connect-four" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/schulke-214/connect-four"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/schulke-214/connect-four'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d4e1db5082c62fd5aeeba6f4a60fdd41e3a4f50b
[INFO] sha for GitHub repo schulke-214/connect-four: d4e1db5082c62fd5aeeba6f4a60fdd41e3a4f50b
[INFO] validating manifest of schulke-214/connect-four 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 schulke-214/connect-four 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 schulke-214/connect-four
[INFO] finished frobbing schulke-214/connect-four
[INFO] frobbed toml for schulke-214/connect-four written to work/ex/beta-1.38-1/sources/1.37.0/gh/schulke-214/connect-four/Cargo.toml
[INFO] started frobbing schulke-214/connect-four
[INFO] finished frobbing schulke-214/connect-four
[INFO] frobbed toml for schulke-214/connect-four written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/schulke-214/connect-four/Cargo.toml
[INFO] crate schulke-214/connect-four 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing schulke-214/connect-four against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/schulke-214/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 6dfca9fdcc7b592b0fed1484d3456a86f234d5bb169b03d5f3c3125b5b24f048
[INFO] running `"docker" "start" "-a" "6dfca9fdcc7b592b0fed1484d3456a86f234d5bb169b03d5f3c3125b5b24f048"`
[INFO] [stderr]    Compiling connect-four v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `player_id`
[INFO] [stderr]    --> src/main.rs:182:35
[INFO] [stderr]     |
[INFO] [stderr] 182 |     fn check_if_player_won(&self, player_id: u8) -> bool {
[INFO] [stderr]     |                                   ^^^^^^^^^ help: consider prefixing with an underscore: `_player_id`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `coin`
[INFO] [stderr]    --> src/main.rs:214:25
[INFO] [stderr]     |
[INFO] [stderr] 214 |             if let Some(coin) = &row[x] {
[INFO] [stderr]     |                         ^^^^ help: consider prefixing with an underscore: `_coin`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `"docker" "inspect" "6dfca9fdcc7b592b0fed1484d3456a86f234d5bb169b03d5f3c3125b5b24f048"`
[INFO] running `"docker" "rm" "-f" "6dfca9fdcc7b592b0fed1484d3456a86f234d5bb169b03d5f3c3125b5b24f048"`
[INFO] [stdout] 6dfca9fdcc7b592b0fed1484d3456a86f234d5bb169b03d5f3c3125b5b24f048
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/schulke-214/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] ae72fc95f2a2a38eeb9a486945a146a3181aed3c49ef96cfaa38c91e4d2a8f49
[INFO] running `"docker" "start" "-a" "ae72fc95f2a2a38eeb9a486945a146a3181aed3c49ef96cfaa38c91e4d2a8f49"`
[INFO] [stderr]    Compiling connect-four v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `player_id`
[INFO] [stderr]    --> src/main.rs:182:35
[INFO] [stderr]     |
[INFO] [stderr] 182 |     fn check_if_player_won(&self, player_id: u8) -> bool {
[INFO] [stderr]     |                                   ^^^^^^^^^ help: consider prefixing with an underscore: `_player_id`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `coin`
[INFO] [stderr]    --> src/main.rs:214:25
[INFO] [stderr]     |
[INFO] [stderr] 214 |             if let Some(coin) = &row[x] {
[INFO] [stderr]     |                         ^^^^ help: consider prefixing with an underscore: `_coin`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "ae72fc95f2a2a38eeb9a486945a146a3181aed3c49ef96cfaa38c91e4d2a8f49"`
[INFO] running `"docker" "rm" "-f" "ae72fc95f2a2a38eeb9a486945a146a3181aed3c49ef96cfaa38c91e4d2a8f49"`
[INFO] [stdout] ae72fc95f2a2a38eeb9a486945a146a3181aed3c49ef96cfaa38c91e4d2a8f49
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/schulke-214/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 99e754bee7cfe9138cb18d1e7add510f779b047ce0d94eb4bf36733987888908
[INFO] running `"docker" "start" "-a" "99e754bee7cfe9138cb18d1e7add510f779b047ce0d94eb4bf36733987888908"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/connect_four-e7a0f31330ca4ac2
[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" "99e754bee7cfe9138cb18d1e7add510f779b047ce0d94eb4bf36733987888908"`
[INFO] running `"docker" "rm" "-f" "99e754bee7cfe9138cb18d1e7add510f779b047ce0d94eb4bf36733987888908"`
[INFO] [stdout] 99e754bee7cfe9138cb18d1e7add510f779b047ce0d94eb4bf36733987888908