[INFO] updating cached repository https://github.com/tadeegan/nn-digits-rust
[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] c1c57320e285dd708334482239280310817689c6
[INFO] checking tadeegan/nn-digits-rust against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftadeegan%2Fnn-digits-rust" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tadeegan/nn-digits-rust on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/tadeegan/nn-digits-rust
[INFO] finished tweaking git repo https://github.com/tadeegan/nn-digits-rust
[INFO] tweaked toml for git repo https://github.com/tadeegan/nn-digits-rust written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/tadeegan/nn-digits-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c4979f6021834b133ea2a4287b7b09ec7cf6c2e2fd51b681cf390af06c7f6b70
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "c4979f6021834b133ea2a4287b7b09ec7cf6c2e2fd51b681cf390af06c7f6b70"`
[INFO] [stderr]     Checking serde v1.0.15
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking csv-core v0.1.3
[INFO] [stderr]     Checking num-iter v0.1.34
[INFO] [stderr]     Checking num v0.1.40
[INFO] [stderr]     Checking rulinalg v0.4.2
[INFO] [stderr]     Checking csv v1.0.0-beta.5
[INFO] [stderr]     Checking digits v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::str`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::str;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `activations::TanH`
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | use activations::TanH;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/main.rs:65:29
[INFO] [stderr]    |
[INFO] [stderr] 65 |                     let y = (i + a);
[INFO] [stderr]    |                             ^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/main.rs:66:29
[INFO] [stderr]    |
[INFO] [stderr] 66 |                     let x = (j + b);
[INFO] [stderr]    |                             ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/main.rs:87:29
[INFO] [stderr]    |
[INFO] [stderr] 87 |                     let y = (i + a);
[INFO] [stderr]    |                             ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/main.rs:88:29
[INFO] [stderr]    |
[INFO] [stderr] 88 |                     let x = (j + b);
[INFO] [stderr]    |                             ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:100:32
[INFO] [stderr]     |
[INFO] [stderr] 100 | fn example() -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::str;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `activations::TanH`
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | use activations::TanH;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/main.rs:65:29
[INFO] [stderr]    |
[INFO] [stderr] 65 |                     let y = (i + a);
[INFO] [stderr]    |                             ^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/main.rs:66:29
[INFO] [stderr]    |
[INFO] [stderr] 66 |                     let x = (j + b);
[INFO] [stderr]    |                             ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/main.rs:87:29
[INFO] [stderr]    |
[INFO] [stderr] 87 |                     let y = (i + a);
[INFO] [stderr]    |                             ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/main.rs:88:29
[INFO] [stderr]    |
[INFO] [stderr] 88 |                     let x = (j + b);
[INFO] [stderr]    |                             ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:100:32
[INFO] [stderr]     |
[INFO] [stderr] 100 | fn example() -> Result<(), Box<Error>> {
[INFO] [stderr]     |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rulinalg::matrix::BaseMatrixMut`
[INFO] [stderr]    --> src/main.rs:262:9
[INFO] [stderr]     |
[INFO] [stderr] 262 |     use rulinalg::matrix::BaseMatrixMut;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `loss`
[INFO] [stderr]    --> src/main.rs:178:17
[INFO] [stderr]     |
[INFO] [stderr] 178 |             let loss = a2.sum() - 1.0;
[INFO] [stderr]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_loss`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:119:13
[INFO] [stderr]     |
[INFO] [stderr] 119 |         let mut label_matrix = Matrix::new(10, 1, dat);
[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_loss`
[INFO] [stderr]   --> src/main.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn sigmoid_loss(yhat: f64, y: f64) -> f64 {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `loss`
[INFO] [stderr]   --> src/main.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn loss(yhat: &Matrix<f64>, y: &Matrix<f64>) -> Matrix<f64> {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_dim`
[INFO] [stderr]   --> src/main.rs:51:4
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn print_dim(m: &Matrix<f64>) {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]   --> src/main.rs:55:29
[INFO] [stderr]    |
[INFO] [stderr] 55 | fn conv(w : &Mat, xi: &Mat, N : usize) -> Matrix<f64> {
[INFO] [stderr]    |                             ^ help: convert the identifier to snake case: `n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `X` should have a snake case name
[INFO] [stderr]   --> src/main.rs:77:18
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn conv_gradient(X : &Mat, dLdz0 : &Mat, N : usize) -> Mat {
[INFO] [stderr]    |                  ^ help: convert the identifier to snake case (notice the capitalization): `x`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `dLdz0` should have a snake case name
[INFO] [stderr]   --> src/main.rs:77:28
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn conv_gradient(X : &Mat, dLdz0 : &Mat, N : usize) -> Mat {
[INFO] [stderr]    |                            ^^^^^ help: convert the identifier to snake case: `d_ldz0`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]   --> src/main.rs:77:42
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn conv_gradient(X : &Mat, dLdz0 : &Mat, N : usize) -> Mat {
[INFO] [stderr]    |                                          ^ help: convert the identifier to snake case: `n`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `W1` should have a snake case name
[INFO] [stderr]    --> src/main.rs:142:13
[INFO] [stderr]     |
[INFO] [stderr] 142 |     let mut W1: Matrix<f64> = reproducible_random_matrix(26 * 26, hidden_layer_nodes); // 784x16
[INFO] [stderr]     |             ^^ help: convert the identifier to snake case (notice the capitalization): `w1`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `W2` should have a snake case name
[INFO] [stderr]    --> src/main.rs:143:13
[INFO] [stderr]     |
[INFO] [stderr] 143 |     let mut W2: Matrix<f64> = reproducible_random_matrix(hidden_layer_nodes, 10); // 16x10
[INFO] [stderr]     |             ^^ help: convert the identifier to snake case (notice the capitalization): `w2`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `dLdW2` should have a snake case name
[INFO] [stderr]    --> src/main.rs:181:17
[INFO] [stderr]     |
[INFO] [stderr] 181 |             let dLdW2 = &a1 * (&a2 - y).transpose(); // -> 16x10
[INFO] [stderr]     |                 ^^^^^ help: convert the identifier to snake case: `d_ld_w2`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `dLdz2` should have a snake case name
[INFO] [stderr]    --> src/main.rs:189:17
[INFO] [stderr]     |
[INFO] [stderr] 189 |             let dLdz2 = &a2 - y; // 10x1
[INFO] [stderr]     |                 ^^^^^ help: convert the identifier to snake case: `d_ldz2`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `dLda1` should have a snake case name
[INFO] [stderr]    --> src/main.rs:190:17
[INFO] [stderr]     |
[INFO] [stderr] 190 |             let dLda1 = &W2 * dLdz2; // 16x10 * 10x1 => 16x1
[INFO] [stderr]     |                 ^^^^^ help: convert the identifier to snake case: `d_lda1`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `dLdz1` should have a snake case name
[INFO] [stderr]    --> src/main.rs:191:17
[INFO] [stderr]     |
[INFO] [stderr] 191 |             let dLdz1 = dLda1.elemul(&z1.apply(&|x| ReLU::derivative(x))); // Apply sigmoid derivative => 16x1
[INFO] [stderr]     |                 ^^^^^ help: convert the identifier to snake case: `d_ldz1`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `dLdW1` should have a snake case name
[INFO] [stderr]    --> src/main.rs:192:17
[INFO] [stderr]     |
[INFO] [stderr] 192 |             let dLdW1 = a0 * dLdz1.transpose(); // (26*26)x16
[INFO] [stderr]     |                 ^^^^^ help: convert the identifier to snake case: `d_ld_w1`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `dLda0` should have a snake case name
[INFO] [stderr]    --> src/main.rs:198:17
[INFO] [stderr]     |
[INFO] [stderr] 198 |             let dLda0 =  &W1 * dLdz1; // (26*26)xhidden_layer_nodes * hidden_layer_nodesx1 => 26*26x1
[INFO] [stderr]     |                 ^^^^^ help: convert the identifier to snake case: `d_lda0`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `dLdz0` should have a snake case name
[INFO] [stderr]    --> src/main.rs:200:17
[INFO] [stderr]     |
[INFO] [stderr] 200 |             let dLdz0 = dLda0.elemul(da0dz0); // 16x1
[INFO] [stderr]     |                 ^^^^^ help: convert the identifier to snake case: `d_ldz0`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `dLdw0` should have a snake case name
[INFO] [stderr]    --> src/main.rs:201:17
[INFO] [stderr]     |
[INFO] [stderr] 201 |             let dLdw0 = conv_gradient(xi, &dLdz0, 28);
[INFO] [stderr]     |                 ^^^^^ help: convert the identifier to snake case: `d_ldw0`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/main.rs:269:24
[INFO] [stderr]     |
[INFO] [stderr] 269 |         let out = conv(w, x, 4);
[INFO] [stderr]     |                        ^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        expected reference, found struct `rulinalg::matrix::Matrix`
[INFO] [stderr]     |                        help: consider borrowing here: `&w`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected reference `&rulinalg::matrix::Matrix<f64>`
[INFO] [stderr]                   found struct `rulinalg::matrix::Matrix<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/main.rs:269:27
[INFO] [stderr]     |
[INFO] [stderr] 269 |         let out = conv(w, x, 4);
[INFO] [stderr]     |                           ^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           expected reference, found struct `rulinalg::matrix::Matrix`
[INFO] [stderr]     |                           help: consider borrowing here: `&x`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected reference `&rulinalg::matrix::Matrix<f64>`
[INFO] [stderr]                   found struct `rulinalg::matrix::Matrix<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/main.rs:278:24
[INFO] [stderr]     |
[INFO] [stderr] 278 |         let out = conv(w, x, 4);
[INFO] [stderr]     |                        ^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        expected reference, found struct `rulinalg::matrix::Matrix`
[INFO] [stderr]     |                        help: consider borrowing here: `&w`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected reference `&rulinalg::matrix::Matrix<f64>`
[INFO] [stderr]                   found struct `rulinalg::matrix::Matrix<_>`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/main.rs:278:27
[INFO] [stderr]     |
[INFO] [stderr] 278 |         let out = conv(w, x, 4);
[INFO] [stderr]     |                           ^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           expected reference, found struct `rulinalg::matrix::Matrix`
[INFO] [stderr]     |                           help: consider borrowing here: `&x`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected reference `&rulinalg::matrix::Matrix<f64>`
[INFO] [stderr]                   found struct `rulinalg::matrix::Matrix<_>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: could not compile `digits`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c4979f6021834b133ea2a4287b7b09ec7cf6c2e2fd51b681cf390af06c7f6b70"`
[INFO] running `"docker" "rm" "-f" "c4979f6021834b133ea2a4287b7b09ec7cf6c2e2fd51b681cf390af06c7f6b70"`
[INFO] [stdout] c4979f6021834b133ea2a4287b7b09ec7cf6c2e2fd51b681cf390af06c7f6b70
