[INFO] cloning repository https://github.com/robbagott/rob-chess-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/robbagott/rob-chess-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobbagott%2Frob-chess-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobbagott%2Frob-chess-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 485b1d73c9d3e283e166ba8fd41e477794d33e0c
[INFO] building robbagott/rob-chess-rust against master#881c1ac408d93bb7adaa3a51dabab9266e82eee8 for issue-85264
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobbagott%2Frob-chess-rust" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/robbagott/rob-chess-rust on toolchain 881c1ac408d93bb7adaa3a51dabab9266e82eee8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/robbagott/rob-chess-rust
[INFO] finished tweaking git repo https://github.com/robbagott/rob-chess-rust
[INFO] tweaked toml for git repo https://github.com/robbagott/rob-chess-rust written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/robbagott/rob-chess-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 84bc090aab91df4e0f7117d7f5fe34879836dbc429110619103c88fb51d9677a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "84bc090aab91df4e0f7117d7f5fe34879836dbc429110619103c88fb51d9677a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84bc090aab91df4e0f7117d7f5fe34879836dbc429110619103c88fb51d9677a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84bc090aab91df4e0f7117d7f5fe34879836dbc429110619103c88fb51d9677a", kill_on_drop: false }`
[INFO] [stdout] 84bc090aab91df4e0f7117d7f5fe34879836dbc429110619103c88fb51d9677a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c282c8f4e8f28533e5e26790249797023ad98af889ea9bc55aea3897a3898be
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8c282c8f4e8f28533e5e26790249797023ad98af889ea9bc55aea3897a3898be", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling rob_chess v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::tree::Tree`
[INFO] [stdout]  --> src/game/engine.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use super::tree::Tree;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/game/engine.rs:46:65
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let eval = -calculate(&mut p, color.opp_color(), depth, -beta, -alpha, &mut child);
[INFO] [stdout]    |                                                                 ^^^^^
[INFO] [stdout]    |                                                                 |
[INFO] [stdout]    |                                                                 expected `&mut f64`, found `f64`
[INFO] [stdout]    |                                                                 help: consider mutably borrowing here: `&mut -beta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/game/engine.rs:46:72
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let eval = -calculate(&mut p, color.opp_color(), depth, -beta, -alpha, &mut child);
[INFO] [stdout]    |                                                                        ^^^^^^
[INFO] [stdout]    |                                                                        |
[INFO] [stdout]    |                                                                        expected `&mut f64`, found `f64`
[INFO] [stdout]    |                                                                        help: consider mutably borrowing here: `&mut -alpha`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0600]: cannot apply unary operator `-` to type `&mut f64`
[INFO] [stdout]   --> src/game/engine.rs:90:13
[INFO] [stdout]    |
[INFO] [stdout] 90 |             -beta,
[INFO] [stdout]    |             ^^^^^ cannot apply unary operator `-`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0600]: cannot apply unary operator `-` to type `&mut f64`
[INFO] [stdout]   --> src/game/engine.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |             -alpha,
[INFO] [stdout]    |             ^^^^^^ cannot apply unary operator `-`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/game/engine.rs:100:31
[INFO] [stdout]     |
[INFO] [stdout] 100 |         alpha = &mut f64::max(alpha, best_so_far);
[INFO] [stdout]     |                               ^^^^^
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               expected `f64`, found `&mut f64`
[INFO] [stdout]     |                               help: consider dereferencing the borrow: `*alpha`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0600]: cannot apply unary operator `-` to type `&mut f64`
[INFO] [stdout]    --> src/game/engine.rs:101:20
[INFO] [stdout]     |
[INFO] [stdout] 101 |         if alpha > -beta {
[INFO] [stdout]     |                    ^^^^^ cannot apply unary operator `-`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0600.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rob_chess`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "8c282c8f4e8f28533e5e26790249797023ad98af889ea9bc55aea3897a3898be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c282c8f4e8f28533e5e26790249797023ad98af889ea9bc55aea3897a3898be", kill_on_drop: false }`
[INFO] [stdout] 8c282c8f4e8f28533e5e26790249797023ad98af889ea9bc55aea3897a3898be
