[INFO] cloning repository https://github.com/elefAntti/bit_board
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/elefAntti/bit_board" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FelefAntti%2Fbit_board", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FelefAntti%2Fbit_board'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d1d2ece22c88ae9828d28c1e432b683ccdca6435
[INFO] testing elefAntti/bit_board against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FelefAntti%2Fbit_board" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/elefAntti/bit_board on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/elefAntti/bit_board
[INFO] finished tweaking git repo https://github.com/elefAntti/bit_board
[INFO] tweaked toml for git repo https://github.com/elefAntti/bit_board written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/elefAntti/bit_board already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8042be7b328c1f410326953e7586111a501929275ec2d7fe0e6d2d7e9788dc48
[INFO] running `Command { std: "docker" "start" "-a" "8042be7b328c1f410326953e7586111a501929275ec2d7fe0e6d2d7e9788dc48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8042be7b328c1f410326953e7586111a501929275ec2d7fe0e6d2d7e9788dc48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8042be7b328c1f410326953e7586111a501929275ec2d7fe0e6d2d7e9788dc48", kill_on_drop: false }`
[INFO] [stdout] 8042be7b328c1f410326953e7586111a501929275ec2d7fe0e6d2d7e9788dc48
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2ce5294711c8eb7bbb38dc285695e9d6cb739bff2f0fe47731a03751ebcb2e3
[INFO] running `Command { std: "docker" "start" "-a" "b2ce5294711c8eb7bbb38dc285695e9d6cb739bff2f0fe47731a03751ebcb2e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling bit_board v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:12:22
[INFO] [stdout]    |
[INFO] [stdout] 12 | type OthelloPlayer = game::Player< Situation = othello::OthelloSituation, Move = OthelloMove >;
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 12 - type OthelloPlayer = game::Player< Situation = othello::OthelloSituation, Move = OthelloMove >;
[INFO] [stdout] 12 + type OthelloPlayer = dyn game::Player< Situation = othello::OthelloSituation, Move = OthelloMove >;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ai.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |         let mut best_score = -Self::Evaluator::MAX_SCORE;
[INFO] [stdout]     |             ----^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bit_board` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "b2ce5294711c8eb7bbb38dc285695e9d6cb739bff2f0fe47731a03751ebcb2e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2ce5294711c8eb7bbb38dc285695e9d6cb739bff2f0fe47731a03751ebcb2e3", kill_on_drop: false }`
[INFO] [stdout] b2ce5294711c8eb7bbb38dc285695e9d6cb739bff2f0fe47731a03751ebcb2e3