[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] checking robbagott/rob-chess-rust against beta-2021-10-15 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobbagott%2Frob-chess-rust" "/workspace/builds/worker-64/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-64/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/robbagott/rob-chess-rust on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "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-64/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" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9e1763351f38a56d250b3e9c70e8d968922d4310d05491698219b19ed7acb847
[INFO] running `Command { std: "docker" "start" "-a" "9e1763351f38a56d250b3e9c70e8d968922d4310d05491698219b19ed7acb847", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e1763351f38a56d250b3e9c70e8d968922d4310d05491698219b19ed7acb847", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e1763351f38a56d250b3e9c70e8d968922d4310d05491698219b19ed7acb847", kill_on_drop: false }`
[INFO] [stdout] 9e1763351f38a56d250b3e9c70e8d968922d4310d05491698219b19ed7acb847
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f28e86077dcad352c06731948acd16179fff164404373d0fd43449ccf9cd1d43
[INFO] running `Command { std: "docker" "start" "-a" "f28e86077dcad352c06731948acd16179fff164404373d0fd43449ccf9cd1d43", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]     Checking 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] 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]     |                               ^^^^^ expected `f64`, found `&mut f64`
[INFO] [stdout]     |
[INFO] [stdout] help: consider dereferencing the borrow
[INFO] [stdout]     |
[INFO] [stdout] 100 |         alpha = &mut f64::max(*alpha, best_so_far);
[INFO] [stdout]     |                               +
[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[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]     |                               ^^^^^ expected `f64`, found `&mut f64`
[INFO] [stdout]     |
[INFO] [stdout] help: consider dereferencing the borrow
[INFO] [stdout]     |
[INFO] [stdout] 100 |         alpha = &mut f64::max(*alpha, best_so_far);
[INFO] [stdout]     |                               +
[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` due to 7 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "f28e86077dcad352c06731948acd16179fff164404373d0fd43449ccf9cd1d43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f28e86077dcad352c06731948acd16179fff164404373d0fd43449ccf9cd1d43", kill_on_drop: false }`
[INFO] [stdout] f28e86077dcad352c06731948acd16179fff164404373d0fd43449ccf9cd1d43
