[INFO] cloning repository https://github.com/frey-mz/alphazero-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/frey-mz/alphazero-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrey-mz%2Falphazero-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrey-mz%2Falphazero-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3445d2e0f843df8c7e2c9125e1f4876cba90e044
[INFO] checking frey-mz/alphazero-rust against try#54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47 for pr-153041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrey-mz%2Falphazero-rust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/frey-mz/alphazero-rust
[INFO] finished tweaking git repo https://github.com/frey-mz/alphazero-rust
[INFO] tweaked toml for git repo https://github.com/frey-mz/alphazero-rust written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/frey-mz/alphazero-rust on toolchain 54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/frey-mz/alphazero-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 724eca8746b47a94cf04a7e0676c66be8e61f69ce5a0dadff5a0fcf04be79e15
[INFO] running `Command { std: "docker" "start" "-a" "724eca8746b47a94cf04a7e0676c66be8e61f69ce5a0dadff5a0fcf04be79e15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "724eca8746b47a94cf04a7e0676c66be8e61f69ce5a0dadff5a0fcf04be79e15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "724eca8746b47a94cf04a7e0676c66be8e61f69ce5a0dadff5a0fcf04be79e15", kill_on_drop: false }`
[INFO] [stdout] 724eca8746b47a94cf04a7e0676c66be8e61f69ce5a0dadff5a0fcf04be79e15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+54bb9bb1bbe87f59b5a2e9afea4c8cedcf5e0b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d6059bd9eb815770a7dbbb0a33dbb767fe1cf96dd297e8af49ddb9a1bdaf56ab
[INFO] running `Command { std: "docker" "start" "-a" "d6059bd9eb815770a7dbbb0a33dbb767fe1cf96dd297e8af49ddb9a1bdaf56ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling libc v0.2.161
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling serde v1.0.214
[INFO] [stderr]     Checking once_cell v1.20.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]     Checking log v0.4.22
[INFO] [stderr]     Checking allocator-api2 v0.2.18
[INFO] [stderr]     Checking bitflags v2.6.0
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling libm v0.2.11
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]    Compiling thiserror v1.0.66
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling cfg_aliases v0.1.1
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]     Checking arrayvec v0.7.6
[INFO] [stderr]     Checking ryu v1.0.18
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]     Checking foldhash v0.1.3
[INFO] [stderr]    Compiling portable-atomic v1.9.0
[INFO] [stderr]     Checking libloading v0.8.5
[INFO] [stderr]    Compiling cfg_aliases v0.2.1
[INFO] [stderr]     Checking hashbrown v0.15.0
[INFO] [stderr]    Compiling serde_json v1.0.132
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]     Checking concurrent-queue v2.5.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking option-ext v0.2.0
[INFO] [stderr]    Compiling syn v2.0.86
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking pin-project-lite v0.2.15
[INFO] [stderr]     Checking parking v2.2.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking dirs-sys v0.4.1
[INFO] [stderr]     Checking event-listener v5.3.1
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking parking_lot v0.12.3
[INFO] [stderr]    Compiling naga v22.1.0
[INFO] [stderr]    Compiling khronos-egl v6.0.0
[INFO] [stderr]     Checking pollster v0.3.0
[INFO] [stderr]    Compiling ash v0.38.0+1.3.281
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]     Checking bit-vec v0.7.0
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]     Checking indexmap v2.6.0
[INFO] [stderr]     Checking event-listener-strategy v0.5.2
[INFO] [stderr]     Checking rayon-core v1.12.1
[INFO] [stderr]     Checking dirs v5.0.1
[INFO] [stderr]    Compiling cubecl-runtime v0.2.0
[INFO] [stderr]    Compiling wgpu-hal v22.0.0
[INFO] [stderr]     Checking spirv v0.3.0+sdk-1.3.268.0
[INFO] [stderr]     Checking bit-set v0.6.0
[INFO] [stderr]     Checking codespan-reporting v0.11.1
[INFO] [stderr]     Checking gpu-descriptor-types v0.2.0
[INFO] [stderr]     Checking gpu-alloc-types v0.3.0
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]     Checking hexf-parse v0.2.1
[INFO] [stderr]     Checking unicode-xid v0.2.6
[INFO] [stderr]     Checking async-channel v2.3.1
[INFO] [stderr]     Checking gpu-alloc v0.6.0
[INFO] [stderr]    Compiling wgpu-core v22.1.0
[INFO] [stderr]     Checking wgpu-types v22.0.0
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]    Compiling litrs v0.4.1
[INFO] [stderr]     Checking renderdoc-sys v1.1.0
[INFO] [stderr]     Checking glow v0.13.1
[INFO] [stderr]     Checking raw-window-handle v0.6.2
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]    Compiling wgpu v22.1.0
[INFO] [stderr]    Compiling cubecl-wgpu v0.2.0
[INFO] [stderr]    Compiling document-features v0.2.10
[INFO] [stderr]     Checking adler2 v2.0.0
[INFO] [stderr]    Compiling rustversion v1.0.18
[INFO] [stderr]     Checking miniz_oxide v0.8.0
[INFO] [stderr]    Compiling cc v1.1.31
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]    Compiling pkg-config v0.3.31
[INFO] [stderr]    Compiling anyhow v1.0.92
[INFO] [stderr]     Checking tinyvec v1.8.0
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]    Compiling libsqlite3-sys v0.28.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.2
[INFO] [stderr]     Checking aligned-vec v0.5.0
[INFO] [stderr]    Compiling built v0.7.5
[INFO] [stderr]     Checking data-encoding v2.6.0
[INFO] [stderr]     Checking fastrand v2.1.1
[INFO] [stderr]     Checking v_frame v0.3.8
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking unicode-normalization v0.1.24
[INFO] [stderr]     Checking colored v2.1.0
[INFO] [stderr]    Compiling rav1e v0.7.1
[INFO] [stderr]     Checking itertools v0.12.1
[INFO] [stderr]     Checking crc32fast v1.4.2
[INFO] [stderr]    Compiling rustix v0.38.38
[INFO] [stderr]     Checking faster-hex v0.9.0
[INFO] [stderr]     Checking gix-utils v0.1.13
[INFO] [stderr]     Checking flate2 v1.0.34
[INFO] [stderr]    Compiling simd_helpers v0.1.0
[INFO] [stderr]     Checking maybe-rayon v0.1.1
[INFO] [stderr]     Checking fallible-iterator v0.3.0
[INFO] [stderr]     Checking regex-syntax v0.8.5
[INFO] [stderr]     Checking av1-grain v0.2.3
[INFO] [stderr]     Checking new_debug_unreachable v1.0.6
[INFO] [stderr]     Checking fallible-streaming-iterator v0.1.9
[INFO] [stderr]     Checking imgref v1.11.0
[INFO] [stderr]     Checking bitstream-io v2.5.3
[INFO] [stderr]     Checking gix-trace v0.1.11
[INFO] [stderr]     Checking quick-error v2.0.1
[INFO] [stderr]    Compiling noop_proc_macro v0.3.0
[INFO] [stderr]     Checking linux-raw-sys v0.4.14
[INFO] [stderr]    Compiling darling_core v0.20.10
[INFO] [stderr]     Checking loop9 v0.1.5
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking fdeflate v0.3.6
[INFO] [stderr]     Checking regex-automata v0.4.8
[INFO] [stderr]     Checking scheduled-thread-pool v0.2.7
[INFO] [stderr]     Checking avif-serialize v0.8.2
[INFO] [stderr]     Checking num-conv v0.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.214
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling thiserror-impl v1.0.66
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]    Compiling profiling-procmacros v1.0.16
[INFO] [stderr]    Compiling derive-new v0.6.0
[INFO] [stderr]    Compiling bytemuck_derive v1.8.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking profiling v1.0.16
[INFO] [stderr]    Compiling cubecl-macros v0.2.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking gix-hash v0.14.2
[INFO] [stderr]    Compiling arg_enum_proc_macro v0.3.4
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]    Compiling num-derive v0.4.2
[INFO] [stderr]     Checking bytemuck v1.19.0
[INFO] [stderr]     Checking gix-features v0.38.2
[INFO] [stderr]     Checking hashbrown v0.13.2
[INFO] [stderr]    Compiling strum_macros v0.26.4
[INFO] [stderr]     Checking rgb v0.8.50
[INFO] [stderr]     Checking zune-core v0.4.12
[INFO] [stderr]     Checking time-core v0.1.2
[INFO] [stderr]     Checking num_threads v0.1.7
[INFO] [stderr]     Checking byteorder-lite v0.1.0
[INFO] [stderr]     Checking jpeg-decoder v0.3.1
[INFO] [stderr]     Checking image-webp v0.2.0
[INFO] [stderr]     Checking tiff v0.9.1
[INFO] [stderr]     Checking zune-jpeg v0.4.13
[INFO] [stderr]     Checking time v0.3.36
[INFO] [stderr]     Checking strum v0.26.3
[INFO] [stderr]     Checking gif v0.13.1
[INFO] [stderr]     Checking png v0.17.14
[INFO] [stderr]     Checking gix-fs v0.11.3
[INFO] [stderr]     Checking qoi v0.4.1
[INFO] [stderr]     Checking uuid v1.11.0
[INFO] [stderr]    Compiling darling_macro v0.20.10
[INFO] [stderr]     Checking tempfile v3.13.0
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]     Checking r2d2 v0.8.10
[INFO] [stderr]     Checking rmp v0.8.14
[INFO] [stderr]     Checking mio v0.8.11
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]     Checking sanitize-filename v0.5.0
[INFO] [stderr]    Compiling darling v0.20.10
[INFO] [stderr]     Checking castaway v0.2.3
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking signal-hook-mio v0.2.4
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking half v2.4.1
[INFO] [stderr]     Checking cubecl-common v0.2.0
[INFO] [stderr]     Checking burn-common v0.14.0
[INFO] [stderr]     Checking serde_bytes v0.11.15
[INFO] [stderr]     Checking exr v1.73.0
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking rmp-serde v1.3.0
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]     Checking itertools v0.13.0
[INFO] [stderr]     Checking gpu-descriptor v0.3.0
[INFO] [stderr]     Checking hashlink v0.9.1
[INFO] [stderr]     Checking text_placeholder v0.5.1
[INFO] [stderr]     Checking dashmap v6.1.0
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]     Checking rusqlite v0.31.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking gix-tempfile v14.0.2
[INFO] [stderr]     Checking cubecl-core v0.2.0
[INFO] [stderr]     Checking compact_str v0.7.1
[INFO] [stderr]     Checking crossterm v0.27.0
[INFO] [stderr]     Checking unicode-truncate v1.1.0
[INFO] [stderr]     Checking bincode v2.0.0-rc.3
[INFO] [stderr]     Checking r2d2_sqlite v0.24.0
[INFO] [stderr]     Checking serde_rusqlite v0.35.0
[INFO] [stderr]     Checking ravif v0.11.11
[INFO] [stderr]    Compiling wrapcenum-derive v0.4.1
[INFO] [stderr]    Compiling burn-derive v0.14.0
[INFO] [stderr]    Compiling stability v0.2.1
[INFO] [stderr]     Checking lru v0.12.5
[INFO] [stderr]     Checking nvml-wrapper-sys v0.8.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.13
[INFO] [stderr]     Checking bytesize v1.3.0
[INFO] [stderr]     Checking systemstat v0.2.3
[INFO] [stderr]     Checking ratatui v0.26.3
[INFO] [stderr]     Checking tracing-appender v0.2.3
[INFO] [stderr]     Checking sysinfo v0.30.13
[INFO] [stderr]     Checking gimli v0.31.1
[INFO] [stderr]     Checking image v0.25.4
[INFO] [stderr]     Checking nvml-wrapper v0.10.0
[INFO] [stderr]     Checking object v0.36.5
[INFO] [stderr]     Checking rustc-demangle v0.1.24
[INFO] [stderr]     Checking cubecl-linalg v0.2.0
[INFO] [stderr]     Checking petgraph v0.6.5
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking addr2line v0.24.2
[INFO] [stderr]     Checking burn-dataset v0.14.0
[INFO] [stderr]     Checking backtrace v0.3.74
[INFO] [stderr]     Checking cubecl v0.2.0
[INFO] [stderr]     Checking burn-tensor v0.14.0
[INFO] [stderr]     Checking burn-fusion v0.14.0
[INFO] [stderr]     Checking burn-autodiff v0.14.0
[INFO] [stderr]     Checking burn-jit v0.14.0
[INFO] [stderr]     Checking burn-wgpu v0.14.0
[INFO] [stderr]     Checking burn-core v0.14.0
[INFO] [stderr]     Checking burn-train v0.14.0
[INFO] [stderr]     Checking burn v0.14.0
[INFO] [stderr]     Checking alphazero-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `learn`
[INFO] [stdout]  --> examples/connect_four.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 | use alphazero_rust::coach::{learn, CoachOptions};
[INFO] [stdout]   |                             ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> examples/connect_four.rs:6:27
[INFO] [stdout]   |
[INFO] [stdout] 6 | use burn::backend::wgpu::{self, JitBackend, WgpuDevice, WgpuRuntime};
[INFO] [stdout]   |                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Wgpu`
[INFO] [stdout]  --> examples/connect_four.rs:7:31
[INFO] [stdout]   |
[INFO] [stdout] 7 | use burn::backend::{Autodiff, Wgpu};
[INFO] [stdout]   |                               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `burn::module::AutodiffModule`
[INFO] [stdout]   --> examples/connect_four.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use burn::module::AutodiffModule;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `AdamConfig`
[INFO] [stdout]   --> examples/connect_four.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 | use burn::optim::{AdamConfig, GradientsParams, Optimizer, SgdConfig};
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `burn::record::CompactRecorder`
[INFO] [stdout]   --> examples/connect_four.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use burn::record::CompactRecorder;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `softmax`
[INFO] [stdout]   --> examples/connect_four.rs:16:45
[INFO] [stdout]    |
[INFO] [stdout] 16 | use burn::tensor::activation::{log_softmax, softmax};
[INFO] [stdout]    |                                             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `burn::tensor::cast::ToElement`
[INFO] [stdout]   --> examples/connect_four.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use burn::tensor::cast::ToElement;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AccuracyMetric` and `LossMetric`
[INFO] [stdout]   --> examples/connect_four.rs:20:27
[INFO] [stdout]    |
[INFO] [stdout] 20 | use burn::train::metric::{AccuracyMetric, LossMetric};
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `burn::train::ClassificationOutput`
[INFO] [stdout]   --> examples/connect_four.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use burn::train::ClassificationOutput;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `burn::train::TrainOutput`
[INFO] [stdout]   --> examples/connect_four.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | use burn::train::TrainOutput;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `LearnerBuilder`
[INFO] [stdout]   --> examples/connect_four.rs:24:19
[INFO] [stdout]    |
[INFO] [stdout] 24 | use burn::train::{LearnerBuilder, TrainStep};
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `CrossEntropyLossConfig` and `CrossEntropyLoss`
[INFO] [stdout]   --> examples/connect_four.rs:25:16
[INFO] [stdout]    |
[INFO] [stdout] 25 | use nn::loss::{CrossEntropyLoss, CrossEntropyLossConfig, MseLoss};
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::thread_rng`
[INFO] [stdout]   --> examples/connect_four.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | use rand::thread_rng;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `burn::train::ValidStep`
[INFO] [stdout]   --> examples/connect_four.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | use burn::train::ValidStep;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::seq::SliceRandom`
[INFO] [stdout]   --> examples/connect_four.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | use rand::seq::SliceRandom;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TrainStep`
[INFO] [stdout]   --> examples/connect_four.rs:24:35
[INFO] [stdout]    |
[INFO] [stdout] 24 | use burn::train::{LearnerBuilder, TrainStep};
[INFO] [stdout]    |                                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `perspective`
[INFO] [stdout]    --> examples/connect_four.rs:115:23
[INFO] [stdout]     |
[INFO] [stdout] 115 |     fn predict(&self, perspective: &Self::State, device: &<Self::BurnBackend as Backend>::Device)->(Tensor<Self::BurnBackend, 1, Fl...
[INFO] [stdout]     |                       ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_perspective`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `training_data`
[INFO] [stdout]    --> examples/connect_four.rs:120:21
[INFO] [stdout]     |
[INFO] [stdout] 120 |     fn train(&self, training_data: Vec<&(Self::State, Tensor<Self::BurnBackend, 1>, f64)>, device: &<Self::BurnBackend as Backend>:...
[INFO] [stdout]     |                     ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_training_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `device`
[INFO] [stdout]    --> examples/connect_four.rs:120:92
[INFO] [stdout]     |
[INFO] [stdout] 120 | ...::BurnBackend, 1>, f64)>, device: &<Self::BurnBackend as Backend>::Device)->Self {
[INFO] [stdout]     |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_device`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DataSet` is never constructed
[INFO] [stdout]    --> examples/connect_four.rs:508:8
[INFO] [stdout]     |
[INFO] [stdout] 508 | struct DataSet<State, const ACTION_SIZE: usize> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Connect4Net` is never constructed
[INFO] [stdout]    --> examples/connect_four.rs:526:8
[INFO] [stdout]     |
[INFO] [stdout] 526 | struct Connect4Net<B: Backend> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `forward` are never used
[INFO] [stdout]    --> examples/connect_four.rs:535:8
[INFO] [stdout]     |
[INFO] [stdout] 534 | impl<B: Backend> Connect4Net<B> {
[INFO] [stdout]     | ------------------------------- associated items in this implementation
[INFO] [stdout] 535 |     fn new(device: &Device<B>) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 544 |     fn forward(&self, input: Tensor<B, 3>) -> (Tensor<B, 1>, Tensor<B, 1>) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 44s
[INFO] running `Command { std: "docker" "inspect" "d6059bd9eb815770a7dbbb0a33dbb767fe1cf96dd297e8af49ddb9a1bdaf56ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6059bd9eb815770a7dbbb0a33dbb767fe1cf96dd297e8af49ddb9a1bdaf56ab", kill_on_drop: false }`
[INFO] [stdout] d6059bd9eb815770a7dbbb0a33dbb767fe1cf96dd297e8af49ddb9a1bdaf56ab
