[INFO] cloning repository https://github.com/rp-bg/ai_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rp-bg/ai_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frp-bg%2Fai_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frp-bg%2Fai_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] caa041bed0c3529b99a6cb897347dc8fcede9bf4
[INFO] checking rp-bg/ai_learning against master#03c609abb6638f9d7f49f34326d4137d07f5cd61 for pr-155945
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frp-bg%2Fai_learning" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rp-bg/ai_learning
[INFO] finished tweaking git repo https://github.com/rp-bg/ai_learning
[INFO] tweaked toml for git repo https://github.com/rp-bg/ai_learning written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rp-bg/ai_learning on toolchain 03c609abb6638f9d7f49f34326d4137d07f5cd61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rp-bg/ai_learning 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" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "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-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5485f3cee7de142099a1c99831c82b15a4ad084ba3c3a6a732450d32c3656cba
[INFO] running `Command { std: "docker" "start" "-a" "5485f3cee7de142099a1c99831c82b15a4ad084ba3c3a6a732450d32c3656cba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5485f3cee7de142099a1c99831c82b15a4ad084ba3c3a6a732450d32c3656cba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5485f3cee7de142099a1c99831c82b15a4ad084ba3c3a6a732450d32c3656cba", kill_on_drop: false }`
[INFO] [stdout] 5485f3cee7de142099a1c99831c82b15a4ad084ba3c3a6a732450d32c3656cba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c084b6c299c41498532ed3f82390cb8247960efba44e73cb9767bca734c5fe7
[INFO] running `Command { std: "docker" "start" "-a" "7c084b6c299c41498532ed3f82390cb8247960efba44e73cb9767bca734c5fe7", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `LinearModel`
[INFO] [stdout]  --> src/activity/lesson6/train.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::model::{LinearModel, NeuralModel};
[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: `LinearModel`
[INFO] [stdout]  --> src/activity/lesson6/train.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::model::{LinearModel, NeuralModel};
[INFO] [stdout]   |                    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinearModel` is never constructed
[INFO] [stdout]  --> src/activity/lesson6/model.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct LinearModel<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: associated items `new` and `forward` are never used
[INFO] [stdout]   --> src/activity/lesson6/model.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<B: Backend> LinearModel<B> {
[INFO] [stdout]    | ------------------------------- associated items in this implementation
[INFO] [stdout] 14 |     pub fn new(device: &B::Device) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn forward(&self, input: Tensor<B, 2>) -> Tensor<B, 2> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinearModel` is never constructed
[INFO] [stdout]  --> src/activity/lesson6/model.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct LinearModel<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: associated items `new` and `forward` are never used
[INFO] [stdout]   --> src/activity/lesson6/model.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<B: Backend> LinearModel<B> {
[INFO] [stdout]    | ------------------------------- associated items in this implementation
[INFO] [stdout] 14 |     pub fn new(device: &B::Device) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn forward(&self, input: Tensor<B, 2>) -> Tensor<B, 2> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4m 03s
[INFO] running `Command { std: "docker" "inspect" "7c084b6c299c41498532ed3f82390cb8247960efba44e73cb9767bca734c5fe7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c084b6c299c41498532ed3f82390cb8247960efba44e73cb9767bca734c5fe7", kill_on_drop: false }`
[INFO] [stdout] 7c084b6c299c41498532ed3f82390cb8247960efba44e73cb9767bca734c5fe7