[INFO] cloning repository https://github.com/fudini/neurust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fudini/neurust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffudini%2Fneurust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffudini%2Fneurust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5dfe883bb281a98eb0e28df1018ab944ed183ac0
[INFO] checking fudini/neurust against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffudini%2Fneurust" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fudini/neurust on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fudini/neurust
[INFO] finished tweaking git repo https://github.com/fudini/neurust
[INFO] tweaked toml for git repo https://github.com/fudini/neurust written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/fudini/neurust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0435bd8e4b7c7b86d66ecce224e5ddf975537db63a1eedd8570103dec8e43f37
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0435bd8e4b7c7b86d66ecce224e5ddf975537db63a1eedd8570103dec8e43f37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0435bd8e4b7c7b86d66ecce224e5ddf975537db63a1eedd8570103dec8e43f37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0435bd8e4b7c7b86d66ecce224e5ddf975537db63a1eedd8570103dec8e43f37", kill_on_drop: false }`
[INFO] [stdout] 0435bd8e4b7c7b86d66ecce224e5ddf975537db63a1eedd8570103dec8e43f37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] dc902856819abf17e8a70bd4cef8558e3a47201598643aaf5f17570a6fcde142
[INFO] running `Command { std: "docker" "start" "-a" "dc902856819abf17e8a70bd4cef8558e3a47201598643aaf5f17570a6fcde142", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.19
[INFO] [stderr]     Checking time v0.1.36
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking neurust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Neuron`
[INFO] [stdout]  --> src/main.rs:9:30
[INFO] [stdout]   |
[INFO] [stdout] 9 | use neural::{ NeuralNetwork, Neuron };
[INFO] [stdout]   |                              ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Neuron`
[INFO] [stdout]  --> src/main.rs:9:30
[INFO] [stdout]   |
[INFO] [stdout] 9 | use neural::{ NeuralNetwork, Neuron };
[INFO] [stdout]   |                              ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `error` is never read
[INFO] [stdout]   --> src/main.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let mut error = 0.0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `error` is never read
[INFO] [stdout]   --> src/main.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let mut error = 0.0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Data`
[INFO] [stdout]   --> src/neural.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub struct Data {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Data`
[INFO] [stdout]   --> src/neural.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub struct Data {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `import`
[INFO] [stdout]    --> src/neural.rs:180:12
[INFO] [stdout]     |
[INFO] [stdout] 180 |     pub fn import(data: Data) -> NeuralNetwork {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `export`
[INFO] [stdout]    --> src/neural.rs:198:12
[INFO] [stdout]     |
[INFO] [stdout] 198 |     pub fn export(&self) -> Data { 
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `render_digit`
[INFO] [stdout]    --> src/mnist.rs:136:8
[INFO] [stdout]     |
[INFO] [stdout] 136 | pub fn render_digit(pixels: &Vec<f64>) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tanh_activation`
[INFO] [stdout]   --> src/functions.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn tanh_activation(x: f64) -> f64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tanh_derivative`
[INFO] [stdout]   --> src/functions.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn tanh_derivative(o: f64) -> f64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `TANH`
[INFO] [stdout]   --> src/functions.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub static TANH: ActivationFn = (tanh_activation, tanh_derivative);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run_xor`
[INFO] [stdout]   --> src/main.rs:88:4
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn run_xor () {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `with_layers`
[INFO] [stdout]    --> src/neural.rs:128:12
[INFO] [stdout]     |
[INFO] [stdout] 128 |     pub fn with_layers(
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `import`
[INFO] [stdout]    --> src/neural.rs:180:12
[INFO] [stdout]     |
[INFO] [stdout] 180 |     pub fn import(data: Data) -> NeuralNetwork {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `export`
[INFO] [stdout]    --> src/neural.rs:198:12
[INFO] [stdout]     |
[INFO] [stdout] 198 |     pub fn export(&self) -> Data { 
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `render_digit`
[INFO] [stdout]    --> src/mnist.rs:136:8
[INFO] [stdout]     |
[INFO] [stdout] 136 | pub fn render_digit(pixels: &Vec<f64>) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tanh_activation`
[INFO] [stdout]   --> src/functions.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn tanh_activation(x: f64) -> f64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tanh_derivative`
[INFO] [stdout]   --> src/functions.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn tanh_derivative(o: f64) -> f64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `TANH`
[INFO] [stdout]   --> src/functions.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub static TANH: ActivationFn = (tanh_activation, tanh_derivative);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run_xor`
[INFO] [stdout]   --> src/main.rs:88:4
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn run_xor () {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/mnist.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     file.read_exact(&mut buffer);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/mnist.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         images_reader.seek(SeekFrom::Start(16 + (i * image_size) as u64));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/mnist.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 93 |         labels_reader.seek(SeekFrom::Start(8 + i as u64));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/mnist.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     file.read_exact(&mut buffer);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/mnist.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |         images_reader.seek(SeekFrom::Start(16 + (i * image_size) as u64));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/mnist.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 93 |         labels_reader.seek(SeekFrom::Start(8 + i as u64));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.80s
[INFO] running `Command { std: "docker" "inspect" "dc902856819abf17e8a70bd4cef8558e3a47201598643aaf5f17570a6fcde142", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc902856819abf17e8a70bd4cef8558e3a47201598643aaf5f17570a6fcde142", kill_on_drop: false }`
[INFO] [stdout] dc902856819abf17e8a70bd4cef8558e3a47201598643aaf5f17570a6fcde142