[INFO] fetching crate animal_chess 0.1.1...
[INFO] checking animal_chess-0.1.1 against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] extracting crate animal_chess 0.1.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate animal_chess 0.1.1 on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate animal_chess 0.1.1
[INFO] finished tweaking crates.io crate animal_chess 0.1.1
[INFO] tweaked toml for crates.io crate animal_chess 0.1.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate animal_chess 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2ad55c08800e2c9911b6f8ef367bb160751f289f978c00f9f906c1d709131863
[INFO] running `Command { std: "docker" "start" "-a" "2ad55c08800e2c9911b6f8ef367bb160751f289f978c00f9f906c1d709131863", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ad55c08800e2c9911b6f8ef367bb160751f289f978c00f9f906c1d709131863", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ad55c08800e2c9911b6f8ef367bb160751f289f978c00f9f906c1d709131863", kill_on_drop: false }`
[INFO] [stdout] 2ad55c08800e2c9911b6f8ef367bb160751f289f978c00f9f906c1d709131863
[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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f7b1c8dc18a153655332a8aea7a9c6dd9baa7d86347adf55d3a9d4336fb48cef
[INFO] running `Command { std: "docker" "start" "-a" "f7b1c8dc18a153655332a8aea7a9c6dd9baa7d86347adf55d3a9d4336fb48cef", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling sdl2 v0.34.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling sdl2-sys v0.34.0
[INFO] [stderr]     Checking animal_chess v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> src/ai.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> src/ai.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::time::{Duration, Instant};
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `max_depth` is assigned to, but never used
[INFO] [stdout]    --> src/ai.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 123 |         let mut max_depth = 0;
[INFO] [stdout]     |             ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]     = note: consider using `_max_depth` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `max_depth` is never read
[INFO] [stdout]    --> src/ai.rs:129:13
[INFO] [stdout]     |
[INFO] [stdout] 129 |             max_depth = d;
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `max_depth` is assigned to, but never used
[INFO] [stdout]    --> src/ai.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 123 |         let mut max_depth = 0;
[INFO] [stdout]     |             ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]     = note: consider using `_max_depth` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `max_depth` is never read
[INFO] [stdout]    --> src/ai.rs:129:13
[INFO] [stdout]     |
[INFO] [stdout] 129 |             max_depth = d;
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.38s
[INFO] running `Command { std: "docker" "inspect" "f7b1c8dc18a153655332a8aea7a9c6dd9baa7d86347adf55d3a9d4336fb48cef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7b1c8dc18a153655332a8aea7a9c6dd9baa7d86347adf55d3a9d4336fb48cef", kill_on_drop: false }`
[INFO] [stdout] f7b1c8dc18a153655332a8aea7a9c6dd9baa7d86347adf55d3a9d4336fb48cef