[INFO] updating cached repository https://github.com/gcharnock/neural-network-handwriting [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 14fa3d41a5acbfb979a5bf2bd10b869476659794 [INFO] checking gcharnock/neural-network-handwriting against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgcharnock%2Fneural-network-handwriting" "/workspace/builds/worker-0/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/gcharnock/neural-network-handwriting on toolchain 45d050cde277b22a755847338f2acc2c7b834141 [INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/gcharnock/neural-network-handwriting [INFO] finished tweaking git repo https://github.com/gcharnock/neural-network-handwriting [INFO] tweaked toml for git repo https://github.com/gcharnock/neural-network-handwriting written to /workspace/builds/worker-0/source/Cargo.toml [INFO] crate git repo https://github.com/gcharnock/neural-network-handwriting already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 165371cb2d81f2ba72dbb7369b8c35955f753da2f0dc15dfec2996343c4355ff [INFO] running `"docker" "start" "-a" "165371cb2d81f2ba72dbb7369b8c35955f753da2f0dc15dfec2996343c4355ff"` [INFO] [stderr] Compiling num-traits v0.2.4 [INFO] [stderr] Checking byteorder v1.2.3 [INFO] [stderr] Checking neural_network_handwriting v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] error[E0463]: can't find crate for `assert_approx_eq` [INFO] [stderr] --> src/main.rs:2:1 [INFO] [stderr] | [INFO] [stderr] 2 | extern crate assert_approx_eq; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate [INFO] [stderr] [INFO] [stderr] error: aborting due to previous error [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0463`. [INFO] [stderr] error: could not compile `neural_network_handwriting`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] warning: unused variable: `sigmoid_prime_of_z_l_j` [INFO] [stderr] --> src/network.rs:134:21 [INFO] [stderr] | [INFO] [stderr] 134 | let sigmoid_prime_of_z_l_j = sigmoid_deriv(z[k]); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sigmoid_prime_of_z_l_j` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `net` [INFO] [stderr] --> src/network.rs:414:13 [INFO] [stderr] | [INFO] [stderr] 414 | let net = Network::new(vec![layer0, layer1]); [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_net` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/network.rs:230:17 [INFO] [stderr] | [INFO] [stderr] 230 | let mut prev_activation_errors = &mut front[i]; [INFO] [stderr] | ----^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `sigmoid_vec` [INFO] [stderr] --> src/network.rs:13:8 [INFO] [stderr] | [INFO] [stderr] 13 | pub fn sigmoid_vec(x: &Vec, out: &mut Vec) { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `find_d_cost_by_final_activations` [INFO] [stderr] --> src/network.rs:241:5 [INFO] [stderr] | [INFO] [stderr] 241 | pub fn find_d_cost_by_final_activations(&mut self, expected: &Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `print` [INFO] [stderr] --> src/linear.rs:46:5 [INFO] [stderr] | [INFO] [stderr] 46 | fn print(&self) { [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 6 warnings emitted [INFO] [stderr] [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "165371cb2d81f2ba72dbb7369b8c35955f753da2f0dc15dfec2996343c4355ff"` [INFO] running `"docker" "rm" "-f" "165371cb2d81f2ba72dbb7369b8c35955f753da2f0dc15dfec2996343c4355ff"` [INFO] [stdout] 165371cb2d81f2ba72dbb7369b8c35955f753da2f0dc15dfec2996343c4355ff