[INFO] cloning repository https://github.com/brugues/burn-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brugues/burn-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrugues%2Fburn-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrugues%2Fburn-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2d73501e897912741f69e9ef71dfcb57694eb57c
[INFO] checking brugues/burn-playground against master#dc375db7d8df0aa450e622c529147c95eee756f5 for pr-156749
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrugues%2Fburn-playground" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/brugues/burn-playground
[INFO] finished tweaking git repo https://github.com/brugues/burn-playground
[INFO] tweaked toml for git repo https://github.com/brugues/burn-playground written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/brugues/burn-playground on toolchain dc375db7d8df0aa450e622c529147c95eee756f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dc375db7d8df0aa450e622c529147c95eee756f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/brugues/burn-playground 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" "+dc375db7d8df0aa450e622c529147c95eee756f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 78bbb78b1c5450f089ed0718f90d51b0718c3ecd2137a05a8ebe75dd5b6d3cb4
[INFO] running `Command { std: "docker" "start" "78bbb78b1c5450f089ed0718f90d51b0718c3ecd2137a05a8ebe75dd5b6d3cb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "78bbb78b1c5450f089ed0718f90d51b0718c3ecd2137a05a8ebe75dd5b6d3cb4" "/opt/rustwide/cargo-home/bin/cargo" "+dc375db7d8df0aa450e622c529147c95eee756f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78bbb78b1c5450f089ed0718f90d51b0718c3ecd2137a05a8ebe75dd5b6d3cb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "78bbb78b1c5450f089ed0718f90d51b0718c3ecd2137a05a8ebe75dd5b6d3cb4" "/opt/rustwide/cargo-home/bin/cargo" "+dc375db7d8df0aa450e622c529147c95eee756f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.228
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[INFO] [stdout] warning: struct `MnistBatcher` is never constructed
[INFO] [stdout]   --> src/data.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct MnistBatcher<B: Backend> {
[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 `MnistBatch` is never constructed
[INFO] [stdout]   --> src/data.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct MnistBatch<B: Backend> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `image` and `label` are never read
[INFO] [stdout]    --> src/data.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 107 | pub struct MnistItemPrepared {
[INFO] [stdout]     |            ----------------- fields in this struct
[INFO] [stdout] 108 |     image: Tensor<BaseBackend, 3>,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 109 |     label: u8,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `MnistItemPrepared` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Model` is never constructed
[INFO] [stdout]   --> src/model.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Model<B: Backend> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NUM_CLASSES` is never used
[INFO] [stdout]   --> src/model.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 | const NUM_CLASSES: usize = 10;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `forward`, and `forward_classification` are never used
[INFO] [stdout]   --> src/model.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl<B: Backend> Model<B> {
[INFO] [stdout]    | ------------------------- associated items in this implementation
[INFO] [stdout] 27 |     pub fn new(device: &B::Device) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn forward(&self, input: Tensor<B, 3>) -> Tensor<B, 2> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn forward_classification(&self, item: MnistBatch<B>) -> ClassificationOutput<B> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ConvBlock` is never constructed
[INFO] [stdout]   --> src/model.rs:85:12
[INFO] [stdout]    |
[INFO] [stdout] 85 | pub struct ConvBlock<B: Backend> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `forward` are never used
[INFO] [stdout]    --> src/model.rs:93:12
[INFO] [stdout]     |
[INFO] [stdout]  92 | impl<B: Backend> ConvBlock<B> {
[INFO] [stdout]     | ----------------------------- associated items in this implementation
[INFO] [stdout]  93 |     pub fn new(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |     pub fn forward(&self, input: Tensor<B, 4>) -> Tensor<B, 4> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `ARTIFACT_DIR` is never used
[INFO] [stdout]   --> src/training.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | static ARTIFACT_DIR: &str = "/tmp/burn-example-mnist";
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MnistTrainingConfig` is never constructed
[INFO] [stdout]   --> src/training.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub struct MnistTrainingConfig {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_artifact_dir` is never used
[INFO] [stdout]   --> src/training.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn create_artifact_dir(artifact_dir: &str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/training.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | pub fn run<B: Backend>(device: B::Device) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `evaluate` is never used
[INFO] [stdout]    --> src/training.rs:156:4
[INFO] [stdout]     |
[INFO] [stdout] 156 | fn evaluate<B: Backend>(
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `DatasetIdent` is never used
[INFO] [stdout]    --> src/training.rs:180:6
[INFO] [stdout]     |
[INFO] [stdout] 180 | enum DatasetIdent {
[INFO] [stdout]     |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `many`, `prepare`, and `compose` are never used
[INFO] [stdout]    --> src/training.rs:206:12
[INFO] [stdout]     |
[INFO] [stdout] 205 | impl DatasetIdent {
[INFO] [stdout]     | ----------------- associated items in this implementation
[INFO] [stdout] 206 |     pub fn many(transforms: Vec<Transform>) -> Self {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 210 |     pub fn prepare(self, dataset: impl Dataset<MnistItem>) -> impl Dataset<MnistItemPrepared> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 226 |     pub fn compose(
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generate_idents` is never used
[INFO] [stdout]    --> src/training.rs:247:4
[INFO] [stdout]     |
[INFO] [stdout] 247 | fn generate_idents(num_samples_base: Option<usize>) -> Vec<(DatasetIdent, Option<usize>)> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MnistBatcher` is never constructed
[INFO] [stdout]   --> src/data.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct MnistBatcher<B: Backend> {
[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 `MnistBatch` is never constructed
[INFO] [stdout]   --> src/data.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct MnistBatch<B: Backend> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `image` and `label` are never read
[INFO] [stdout]    --> src/data.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 107 | pub struct MnistItemPrepared {
[INFO] [stdout]     |            ----------------- fields in this struct
[INFO] [stdout] 108 |     image: Tensor<BaseBackend, 3>,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 109 |     label: u8,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `MnistItemPrepared` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Model` is never constructed
[INFO] [stdout]   --> src/model.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Model<B: Backend> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NUM_CLASSES` is never used
[INFO] [stdout]   --> src/model.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 | const NUM_CLASSES: usize = 10;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `forward`, and `forward_classification` are never used
[INFO] [stdout]   --> src/model.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl<B: Backend> Model<B> {
[INFO] [stdout]    | ------------------------- associated items in this implementation
[INFO] [stdout] 27 |     pub fn new(device: &B::Device) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn forward(&self, input: Tensor<B, 3>) -> Tensor<B, 2> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn forward_classification(&self, item: MnistBatch<B>) -> ClassificationOutput<B> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ConvBlock` is never constructed
[INFO] [stdout]   --> src/model.rs:85:12
[INFO] [stdout]    |
[INFO] [stdout] 85 | pub struct ConvBlock<B: Backend> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `forward` are never used
[INFO] [stdout]    --> src/model.rs:93:12
[INFO] [stdout]     |
[INFO] [stdout]  92 | impl<B: Backend> ConvBlock<B> {
[INFO] [stdout]     | ----------------------------- associated items in this implementation
[INFO] [stdout]  93 |     pub fn new(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |     pub fn forward(&self, input: Tensor<B, 4>) -> Tensor<B, 4> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `ARTIFACT_DIR` is never used
[INFO] [stdout]   --> src/training.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | static ARTIFACT_DIR: &str = "/tmp/burn-example-mnist";
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MnistTrainingConfig` is never constructed
[INFO] [stdout]   --> src/training.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub struct MnistTrainingConfig {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_artifact_dir` is never used
[INFO] [stdout]   --> src/training.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn create_artifact_dir(artifact_dir: &str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/training.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | pub fn run<B: Backend>(device: B::Device) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `evaluate` is never used
[INFO] [stdout]    --> src/training.rs:156:4
[INFO] [stdout]     |
[INFO] [stdout] 156 | fn evaluate<B: Backend>(
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `DatasetIdent` is never used
[INFO] [stdout]    --> src/training.rs:180:6
[INFO] [stdout]     |
[INFO] [stdout] 180 | enum DatasetIdent {
[INFO] [stdout]     |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `many`, `prepare`, and `compose` are never used
[INFO] [stdout]    --> src/training.rs:206:12
[INFO] [stdout]     |
[INFO] [stdout] 205 | impl DatasetIdent {
[INFO] [stdout]     | ----------------- associated items in this implementation
[INFO] [stdout] 206 |     pub fn many(transforms: Vec<Transform>) -> Self {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 210 |     pub fn prepare(self, dataset: impl Dataset<MnistItem>) -> impl Dataset<MnistItemPrepared> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 226 |     pub fn compose(
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generate_idents` is never used
[INFO] [stdout]    --> src/training.rs:247:4
[INFO] [stdout]     |
[INFO] [stdout] 247 | fn generate_idents(num_samples_base: Option<usize>) -> Vec<(DatasetIdent, Option<usize>)> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5m 35s
[INFO] running `Command { std: "docker" "inspect" "78bbb78b1c5450f089ed0718f90d51b0718c3ecd2137a05a8ebe75dd5b6d3cb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78bbb78b1c5450f089ed0718f90d51b0718c3ecd2137a05a8ebe75dd5b6d3cb4", kill_on_drop: false }`
[INFO] [stdout] 78bbb78b1c5450f089ed0718f90d51b0718c3ecd2137a05a8ebe75dd5b6d3cb4
