[INFO] updating cached repository nicholasyager/mancala
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nicholasyager/mancala
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nicholasyager/mancala" "work/ex/beta-1.37-6/sources/1.36.0/gh/nicholasyager/mancala"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/nicholasyager/mancala'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nicholasyager/mancala" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/nicholasyager/mancala"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/nicholasyager/mancala'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e1eec2e4321ffbf3ded439ba1e9e31200f7c653a
[INFO] sha for GitHub repo nicholasyager/mancala: e1eec2e4321ffbf3ded439ba1e9e31200f7c653a
[INFO] validating manifest of nicholasyager/mancala 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 nicholasyager/mancala 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 nicholasyager/mancala
[INFO] finished frobbing nicholasyager/mancala
[INFO] frobbed toml for nicholasyager/mancala written to work/ex/beta-1.37-6/sources/1.36.0/gh/nicholasyager/mancala/Cargo.toml
[INFO] started frobbing nicholasyager/mancala
[INFO] finished frobbing nicholasyager/mancala
[INFO] frobbed toml for nicholasyager/mancala written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/nicholasyager/mancala/Cargo.toml
[INFO] crate nicholasyager/mancala 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/nicholasyager/mancala/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing nicholasyager/mancala 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-7/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/nicholasyager/mancala:/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] dfc0c9cc32d864e50a05edead44114380f3629be0b66a002d63c62a052e8c8aa
[INFO] running `"docker" "start" "-a" "dfc0c9cc32d864e50a05edead44114380f3629be0b66a002d63c62a052e8c8aa"`
[INFO] [stderr]    Compiling mancala v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:161:17
[INFO] [stderr]     |
[INFO] [stderr] 161 |             let mut final_index = index + (board.cells[index] as usize);
[INFO] [stderr]     |                 ----^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `score`
[INFO] [stderr]    --> src/main.rs:203:5
[INFO] [stderr]     |
[INFO] [stderr] 203 |     fn score(&self, board: &Board) -> i32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `display`
[INFO] [stderr]    --> src/main.rs:211:5
[INFO] [stderr]     |
[INFO] [stderr] 211 |     fn display(&self, board: &Board) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.33s
[INFO] running `"docker" "inspect" "dfc0c9cc32d864e50a05edead44114380f3629be0b66a002d63c62a052e8c8aa"`
[INFO] running `"docker" "rm" "-f" "dfc0c9cc32d864e50a05edead44114380f3629be0b66a002d63c62a052e8c8aa"`
[INFO] [stdout] dfc0c9cc32d864e50a05edead44114380f3629be0b66a002d63c62a052e8c8aa
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/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/nicholasyager/mancala:/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] 360e9dbd64a9d7dd5b6a50a934f939035f5f1da0b1344949b823362b1b4cbc3d
[INFO] running `"docker" "start" "-a" "360e9dbd64a9d7dd5b6a50a934f939035f5f1da0b1344949b823362b1b4cbc3d"`
[INFO] [stderr]    Compiling mancala v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:161:17
[INFO] [stderr]     |
[INFO] [stderr] 161 |             let mut final_index = index + (board.cells[index] as usize);
[INFO] [stderr]     |                 ----^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `score`
[INFO] [stderr]    --> src/main.rs:203:5
[INFO] [stderr]     |
[INFO] [stderr] 203 |     fn score(&self, board: &Board) -> i32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `display`
[INFO] [stderr]    --> src/main.rs:211:5
[INFO] [stderr]     |
[INFO] [stderr] 211 |     fn display(&self, board: &Board) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `"docker" "inspect" "360e9dbd64a9d7dd5b6a50a934f939035f5f1da0b1344949b823362b1b4cbc3d"`
[INFO] running `"docker" "rm" "-f" "360e9dbd64a9d7dd5b6a50a934f939035f5f1da0b1344949b823362b1b4cbc3d"`
[INFO] [stdout] 360e9dbd64a9d7dd5b6a50a934f939035f5f1da0b1344949b823362b1b4cbc3d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/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/nicholasyager/mancala:/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] 3bb6f65f6d8a2a7cb1cefbd02ccb001867cdb8536ec8f6e939acaabab7455d6e
[INFO] running `"docker" "start" "-a" "3bb6f65f6d8a2a7cb1cefbd02ccb001867cdb8536ec8f6e939acaabab7455d6e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mancala-2e26219b82c7f08f
[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" "3bb6f65f6d8a2a7cb1cefbd02ccb001867cdb8536ec8f6e939acaabab7455d6e"`
[INFO] running `"docker" "rm" "-f" "3bb6f65f6d8a2a7cb1cefbd02ccb001867cdb8536ec8f6e939acaabab7455d6e"`
[INFO] [stdout] 3bb6f65f6d8a2a7cb1cefbd02ccb001867cdb8536ec8f6e939acaabab7455d6e