[INFO] cloning repository https://github.com/TymonM/neural_net_lib_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TymonM/neural_net_lib_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTymonM%2Fneural_net_lib_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTymonM%2Fneural_net_lib_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1fa312a38bd58d030233c47305eb6bed19c5d2b5
[INFO] checking TymonM/neural_net_lib_rust against 6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa for pr-159356
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTymonM%2Fneural_net_lib_rust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/TymonM/neural_net_lib_rust
[INFO] finished tweaking git repo https://github.com/TymonM/neural_net_lib_rust
[INFO] tweaked toml for git repo https://github.com/TymonM/neural_net_lib_rust written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/TymonM/neural_net_lib_rust on toolchain 6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/TymonM/neural_net_lib_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" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking TymonM/neural_net_lib_rust against 6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa for pr-159356
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTymonM%2Fneural_net_lib_rust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/TymonM/neural_net_lib_rust
[INFO] finished tweaking git repo https://github.com/TymonM/neural_net_lib_rust
[INFO] tweaked toml for git repo https://github.com/TymonM/neural_net_lib_rust written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/TymonM/neural_net_lib_rust on toolchain 6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/TymonM/neural_net_lib_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" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-complex v0.4.5
[INFO] [stderr]   Downloaded matrixmultiply v0.3.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:c36f533e8924a726b63f9d01e781fa8c8c28c96d1d595403829afb31452ee0f5" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 22f416e54c77a0993d37da67070858052da527339928b3e1b55175d51195471d
[INFO] running `Command { std: "docker" "start" "22f416e54c77a0993d37da67070858052da527339928b3e1b55175d51195471d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22f416e54c77a0993d37da67070858052da527339928b3e1b55175d51195471d", 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" "22f416e54c77a0993d37da67070858052da527339928b3e1b55175d51195471d" "/opt/rustwide/cargo-home/bin/cargo" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22f416e54c77a0993d37da67070858052da527339928b3e1b55175d51195471d", 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" "22f416e54c77a0993d37da67070858052da527339928b3e1b55175d51195471d" "/opt/rustwide/cargo-home/bin/cargo" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling matrixmultiply v0.3.8
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking num-complex v0.4.5
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]     Checking ndarray-rand v0.14.0
[INFO] [stderr]     Checking neural_net v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function `with_params` is never used
[INFO] [stdout]   --> src/perceptron.rs:21:19
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl Perceptron {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 21 |     pub(crate) fn with_params(weights: Array2<f64>, biases: Array1<f64>, activation_function: ActivationFunction) -> Perceptron {
[INFO] [stdout]    |                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]   --> tests/simple.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut a = String::new();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 24 |     a = String::from("4");
[INFO] [stdout]    |     - `a` is overwritten here before the previous value is read
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> tests/simple.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut b = String::new();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 25 |     b = String::from("3");
[INFO] [stdout]    |     - `b` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.28s
[INFO] running `Command { std: "docker" "inspect" "22f416e54c77a0993d37da67070858052da527339928b3e1b55175d51195471d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22f416e54c77a0993d37da67070858052da527339928b3e1b55175d51195471d", kill_on_drop: false }`
[INFO] [stdout] 22f416e54c77a0993d37da67070858052da527339928b3e1b55175d51195471d
