[INFO] cloning repository https://github.com/AlphaGit/alpha-micrograd-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AlphaGit/alpha-micrograd-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlphaGit%2Falpha-micrograd-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlphaGit%2Falpha-micrograd-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cc3de80ec2eff0925103754c808e5642921cc044
[INFO] checking AlphaGit/alpha-micrograd-rust against try#9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869 for pr-129249
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAlphaGit%2Falpha-micrograd-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AlphaGit/alpha-micrograd-rust on toolchain 9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/AlphaGit/alpha-micrograd-rust
[INFO] finished tweaking git repo https://github.com/AlphaGit/alpha-micrograd-rust
[INFO] tweaked toml for git repo https://github.com/AlphaGit/alpha-micrograd-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/AlphaGit/alpha-micrograd-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" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff8cfd8b2867e81e5d3a3fb0e5f22271d56bf01125e856cca14f0ca4833e84b7
[INFO] running `Command { std: "docker" "start" "-a" "ff8cfd8b2867e81e5d3a3fb0e5f22271d56bf01125e856cca14f0ca4833e84b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff8cfd8b2867e81e5d3a3fb0e5f22271d56bf01125e856cca14f0ca4833e84b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff8cfd8b2867e81e5d3a3fb0e5f22271d56bf01125e856cca14f0ca4833e84b7", kill_on_drop: false }`
[INFO] [stdout] ff8cfd8b2867e81e5d3a3fb0e5f22271d56bf01125e856cca14f0ca4833e84b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d567fb8bc557972c84badf9b368e54239985c10993ca7fda5659fc81a4b46468
[INFO] running `Command { std: "docker" "start" "-a" "d567fb8bc557972c84badf9b368e54239985c10993ca7fda5659fc81a4b46468", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]    Compiling unicode-ident v1.0.14
[INFO] [stderr]    Compiling libc v0.2.167
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.90
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking alpha-micrograd-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Neuron` is never constructed
[INFO] [stdout]  --> src/neuron.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Neuron {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Layer` is never constructed
[INFO] [stdout]  --> src/neuron.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Layer {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MLP` is never constructed
[INFO] [stdout]   --> src/neuron.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct MLP {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `forward` are never used
[INFO] [stdout]   --> src/neuron.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Neuron {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 18 |     fn new(n_inputs: u32) -> Neuron {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn forward(&self, x: Vec<Expr>) -> Expr {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `forward` are never used
[INFO] [stdout]   --> src/neuron.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl Layer {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 46 |     fn new(n_inputs: u32, n_outputs: u32) -> Layer {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn forward(&self, x: Vec<Expr>) -> Vec<Expr> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `forward` are never used
[INFO] [stdout]   --> src/neuron.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | impl MLP {
[INFO] [stdout]    | -------- associated items in this implementation
[INFO] [stdout] 58 |     fn new(n_inputs: u32, n_hidden: Vec<u32>, n_outputs: u32) -> MLP {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 70 |     fn forward(&self, x: Vec<Expr>) -> Vec<Expr> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f2`
[INFO] [stdout]    --> src/value.rs:754:33
[INFO] [stdout]     |
[INFO] [stdout] 754 |     fn assert_float_eq(f1: f64, f2: f64) {
[INFO] [stdout]     |                                 ^^ help: if this is intentional, prefix it with an underscore: `_f2`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `assert_get_unary_ref` is never used
[INFO] [stdout]    --> src/value.rs:732:8
[INFO] [stdout]     |
[INFO] [stdout] 732 |     fn assert_get_unary_ref(e: std::cell::Ref<'_, Expr>) -> UnaryExpr {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:383:28
[INFO] [stdout]     |
[INFO] [stdout] 383 |         let value1: Expr = LeafExpr::new(3.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:384:28
[INFO] [stdout]     |
[INFO] [stdout] 384 |         let value2: Expr = LeafExpr::new(4.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:469:28
[INFO] [stdout]     |
[INFO] [stdout] 469 |         let value1: Expr = LeafExpr::new(3.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:470:28
[INFO] [stdout]     |
[INFO] [stdout] 470 |         let value2: Expr = LeafExpr::new(4.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:487:28
[INFO] [stdout]     |
[INFO] [stdout] 487 |         let value1: Expr = LeafExpr::new(3.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:506:28
[INFO] [stdout]     |
[INFO] [stdout] 506 |         let value2: Expr = LeafExpr::new(3.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:523:28
[INFO] [stdout]     |
[INFO] [stdout] 523 |         let value1: Expr = LeafExpr::new(3.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:559:28
[INFO] [stdout]     |
[INFO] [stdout] 559 |         let value1: Expr = LeafExpr::new(3.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:560:28
[INFO] [stdout]     |
[INFO] [stdout] 560 |         let value2: Expr = LeafExpr::new(4.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:577:28
[INFO] [stdout]     |
[INFO] [stdout] 577 |         let value1: Expr = LeafExpr::new(3.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:596:28
[INFO] [stdout]     |
[INFO] [stdout] 596 |         let value2: Expr = LeafExpr::new(4.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:613:28
[INFO] [stdout]     |
[INFO] [stdout] 613 |         let value1: Expr = LeafExpr::new(3.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:632:28
[INFO] [stdout]     |
[INFO] [stdout] 632 |         let value2: Expr = LeafExpr::new(4.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:649:27
[INFO] [stdout]     |
[INFO] [stdout] 649 |         let value: Expr = LeafExpr::new(0.0).into();
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:677:28
[INFO] [stdout]     |
[INFO] [stdout] 677 |         let value1: Expr = LeafExpr::new(3.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:678:28
[INFO] [stdout]     |
[INFO] [stdout] 678 |         let value2: Expr = LeafExpr::new(4.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:694:28
[INFO] [stdout]     |
[INFO] [stdout] 694 |         let value1: Expr = LeafExpr::new(3.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:695:28
[INFO] [stdout]     |
[INFO] [stdout] 695 |         let value2: Expr = LeafExpr::new(4.0).into();
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this conversion is useless `value::Expr` to `value::Expr`
[INFO] [stdout]    --> src/value.rs:711:27
[INFO] [stdout]     |
[INFO] [stdout] 711 |         let value: Expr = LeafExpr::new(0.0).into();
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alpha-micrograd-rust` (lib test) due to 19 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d567fb8bc557972c84badf9b368e54239985c10993ca7fda5659fc81a4b46468", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d567fb8bc557972c84badf9b368e54239985c10993ca7fda5659fc81a4b46468", kill_on_drop: false }`
[INFO] [stdout] d567fb8bc557972c84badf9b368e54239985c10993ca7fda5659fc81a4b46468