[INFO] cloning repository https://github.com/richwandell/rust-algorithms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/richwandell/rust-algorithms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichwandell%2Frust-algorithms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichwandell%2Frust-algorithms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 58cbef2915c323c7a57c4068b5f52094516e952e
[INFO] building richwandell/rust-algorithms against master#881c1ac408d93bb7adaa3a51dabab9266e82eee8 for issue-85264
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frichwandell%2Frust-algorithms" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/richwandell/rust-algorithms on toolchain 881c1ac408d93bb7adaa3a51dabab9266e82eee8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/richwandell/rust-algorithms
[INFO] finished tweaking git repo https://github.com/richwandell/rust-algorithms
[INFO] tweaked toml for git repo https://github.com/richwandell/rust-algorithms written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/richwandell/rust-algorithms already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ndarray v0.13.0
[INFO] [stderr]   Downloaded ndarray-rand v0.11.0
[INFO] [stderr]   Downloaded noisy_float v0.1.11
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[INFO] [stderr]   Downloaded rand_pcg v0.2.0
[INFO] [stderr]   Downloaded ndarray-stats v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bc670481dce78025edb1933d38208065fc92ecc3d9eef09f1f47f9087b369163
[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" "bc670481dce78025edb1933d38208065fc92ecc3d9eef09f1f47f9087b369163", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc670481dce78025edb1933d38208065fc92ecc3d9eef09f1f47f9087b369163", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc670481dce78025edb1933d38208065fc92ecc3d9eef09f1f47f9087b369163", kill_on_drop: false }`
[INFO] [stdout] bc670481dce78025edb1933d38208065fc92ecc3d9eef09f1f47f9087b369163
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d808c211a105473ac0d95b69f9730fb0b892af614df09f2afd2413b8e028e5b3
[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" "d808c211a105473ac0d95b69f9730fb0b892af614df09f2afd2413b8e028e5b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]    Compiling ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling ndarray v0.13.0
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling indexmap v1.2.0
[INFO] [stderr]    Compiling spmc v0.3.0
[INFO] [stderr]    Compiling matrixmultiply v0.2.3
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand_pcg v0.2.0
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling noisy_float v0.1.11
[INFO] [stderr]    Compiling rand_distr v0.2.2
[INFO] [stderr]    Compiling ndarray-stats v0.3.0
[INFO] [stderr]    Compiling ndarray-rand v0.11.0
[INFO] [stderr]    Compiling Algos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `ArrayBase`, `Ix`, `OwnedRepr`
[INFO] [stdout]  --> src/bin/neural_network.rs:5:36
[INFO] [stdout]   |
[INFO] [stdout] 5 | use ndarray::{arr2, Array, Array2, ArrayBase, Ix, OwnedRepr};
[INFO] [stdout]   |                                    ^^^^^^^^^  ^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ndarray::Ix2`
[INFO] [stdout]  --> src/bin/neural_network.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use ndarray::Ix2;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `grid_x` is never read
[INFO] [stdout]   --> src/bin/sudoku_solver.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let mut grid_x = 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 `grid_y` is never read
[INFO] [stdout]   --> src/bin/sudoku_solver.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let mut grid_y = 0;
[INFO] [stdout]    |                 ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/sudoku_solver.rs:48:32
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn solve(mut r:i32, mut c:i32, mut board: &mut Vec<Vec<i32>>) -> bool {
[INFO] [stdout]    |                                ----^^^^^
[INFO] [stdout]    |                                |
[INFO] [stdout]    |                                help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process`
[INFO] [stdout]  --> src/bin/spoj_discrete_roots.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::process;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/spoj_prime_generator.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |         io::stdin().read_line(&mut input);
[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 variable: `n`
[INFO] [stdout]   --> src/bin/producer_consumer_shared_memory.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     for n in 0..cpus {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Algos` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `algos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/bin/producer_consumer_shared_memory.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     for i in 0..cpus {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0271]: type mismatch resolving `<&[usize] as ShapeBuilder>::Dim == Dim<[usize; 2]>`
[INFO] [stdout]   --> src/bin/neural_network.rs:90:20
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let ones = Array2::<f64>::ones(sig.shape());
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^ expected array `[usize; 2]`, found struct `IxDynImpl`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `Dim<[usize; 2]>`
[INFO] [stdout]               found struct `Dim<IxDynImpl>`
[INFO] [stdout]    = note: required by `ndarray::impl_constructors::<impl ArrayBase<S, D>>::ones`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/bin/producer_consumer_message_passing.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     for n in 0..cpus {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/bin/producer_consumer_message_passing.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     for i in 0..cpus {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/producer_consumer_message_passing.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let (mut mptx, mprx) = mpsc::channel();
[INFO] [stdout]    |          ----^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/producer_consumer_message_passing.rs:21:21
[INFO] [stdout]    |
[INFO] [stdout] 21 |                     tx.send(exit);
[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/bin/producer_consumer_message_passing.rs:26:17
[INFO] [stdout]    |
[INFO] [stdout] 26 |                 tx.send(return_value);
[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/bin/producer_consumer_message_passing.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |         sptx.send(exit);
[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/bin/producer_consumer_shared_memory.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         sptx.send(exit);
[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] error[E0599]: no method named `sub` found for struct `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>` in the current scope
[INFO] [stdout]    --> src/bin/neural_network.rs:91:30
[INFO] [stdout]     |
[INFO] [stdout] 91  |         let one_minus = ones.sub(&sig);
[INFO] [stdout]     |                              ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]     |
[INFO] [stdout] 3   | use std::ops::Sub;
[INFO] [stdout]     |
[INFO] [stdout] help: there is an associated function with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 91  |         let one_minus = ones.sum(&sig);
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `usize: SampleBorrow<{float}>` is not satisfied
[INFO] [stdout]    --> src/bin/neural_network.rs:106:71
[INFO] [stdout]     |
[INFO] [stdout] 106 |             let s = Array::random((1, X.shape()[0]), Uniform::new(0., X.shape()[0]));
[INFO] [stdout]     |                                                                       ^^^^^^^^^^^^ the trait `SampleBorrow<{float}>` is not implemented for `usize`
[INFO] [stdout]     |
[INFO] [stdout]     = note: required by `Uniform::<X>::new`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `usize: NdIndex<Dim<[usize; 2]>>` is not satisfied
[INFO] [stdout]    --> src/bin/neural_network.rs:109:25
[INFO] [stdout]     |
[INFO] [stdout] 109 |                 let i = s[n as usize];
[INFO] [stdout]     |                         ^^^^^^^^^^^^^ the trait `NdIndex<Dim<[usize; 2]>>` is not implemented for `usize`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the following implementations were found:
[INFO] [stdout]               <usize as NdIndex<Dim<IxDynImpl>>>
[INFO] [stdout]               <usize as NdIndex<Dim<[usize; 1]>>>
[INFO] [stdout]     = note: required because of the requirements on the impl of `std::ops::Index<usize>` for `ArrayBase<OwnedRepr<{float}>, Dim<[usize; 2]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `ViewRepr<&f64>: DataOwned` is not satisfied
[INFO] [stdout]    --> src/bin/neural_network.rs:110:43
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 let x = X.row(i as usize).reshape((1, X.shape()[1]));
[INFO] [stdout]     |                                           ^^^^^^^ the trait `DataOwned` is not implemented for `ViewRepr<&f64>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/bin/neural_network.rs:112:63
[INFO] [stdout]     |
[INFO] [stdout] 112 |                 let (djdw1, djdw2) = self.cost_function_prime(&x, &yt);
[INFO] [stdout]     |                                                               ^^ expected struct `OwnedRepr`, found struct `ViewRepr`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout]                found reference `&ArrayBase<ViewRepr<&f64>, Dim<[usize; 2]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/bin/neural_network.rs:112:67
[INFO] [stdout]     |
[INFO] [stdout] 112 |                 let (djdw1, djdw2) = self.cost_function_prime(&x, &yt);
[INFO] [stdout]     |                                                                   ^^^ expected struct `OwnedRepr`, found struct `ViewRepr`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout]                found reference `&ArrayBase<ViewRepr<&f64>, Dim<[usize; 1]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0271]: type mismatch resolving `<f64 as Sub<ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>>>::Output == f64`
[INFO] [stdout]    --> src/bin/neural_network.rs:114:36
[INFO] [stdout]     |
[INFO] [stdout] 114 |                 self.W1 = &self.W1 - d1;
[INFO] [stdout]     |                                    ^ expected struct `ArrayBase`, found `f64`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout]                  found type `f64`
[INFO] [stdout]     = note: required because of the requirements on the impl of `Sub<ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>>` for `&ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>: ScalarOperand` is not satisfied
[INFO] [stdout]    --> src/bin/neural_network.rs:114:36
[INFO] [stdout]     |
[INFO] [stdout] 114 |                 self.W1 = &self.W1 - d1;
[INFO] [stdout]     |                                    ^ the trait `ScalarOperand` is not implemented for `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: required because of the requirements on the impl of `Sub<ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>>` for `&ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0271]: type mismatch resolving `<f64 as Sub<ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>>>::Output == f64`
[INFO] [stdout]    --> src/bin/neural_network.rs:116:36
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 self.W2 = &self.W2 - d2;
[INFO] [stdout]     |                                    ^ expected struct `ArrayBase`, found `f64`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout]                  found type `f64`
[INFO] [stdout]     = note: required because of the requirements on the impl of `Sub<ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>>` for `&ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>: ScalarOperand` is not satisfied
[INFO] [stdout]    --> src/bin/neural_network.rs:116:36
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 self.W2 = &self.W2 - d2;
[INFO] [stdout]     |                                    ^ the trait `ScalarOperand` is not implemented for `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: required because of the requirements on the impl of `Sub<ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>>` for `&ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this function takes 2 arguments but 0 arguments were supplied
[INFO] [stdout]    --> src/bin/neural_network.rs:119:29
[INFO] [stdout]     |
[INFO] [stdout] 119 |             let cost = self.cost_function();
[INFO] [stdout]     |                             ^^^^^^^^^^^^^- supplied 0 arguments
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             expected 2 arguments
[INFO] [stdout]     |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/bin/neural_network.rs:25:8
[INFO] [stdout]     |
[INFO] [stdout] 25  |     fn cost_function(&mut self, X: &Array2<f64>, y: &Array2<f64>) -> f64;
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `powi` found for struct `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>` in the current scope
[INFO] [stdout]    --> src/bin/neural_network.rs:131:37
[INFO] [stdout]     |
[INFO] [stdout] 131 |         let squared_summed = ymyhat.powi(2).sum();
[INFO] [stdout]     |                                     ^^^^ method not found in `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot multiply `{integer}` by `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout]    --> src/bin/neural_network.rs:143:23
[INFO] [stdout]     |
[INFO] [stdout] 143 |         let rsub = -1 * ymyh;
[INFO] [stdout]     |                       ^ no implementation for `{integer} * ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Mul<ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>>` is not implemented for `{integer}`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/bin/neural_network.rs:154:31
[INFO] [stdout]     |
[INFO] [stdout] 154 |         let djdw1 = X.t().dot(delta2);
[INFO] [stdout]     |                               ^^^^^^
[INFO] [stdout]     |                               |
[INFO] [stdout]     |                               expected reference, found struct `ArrayBase`
[INFO] [stdout]     |                               help: consider borrowing here: `&delta2`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&_`
[INFO] [stdout]                   found struct `ArrayBase<OwnedRepr<f64>, Dim<[usize; 2]>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 15 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0271, E0277, E0308, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `Algos`
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/bin/spoj_discrete_roots.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |         if b & 1 {
[INFO] [stdout]   |            ^^^^^ expected `bool`, found `i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d808c211a105473ac0d95b69f9730fb0b892af614df09f2afd2413b8e028e5b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d808c211a105473ac0d95b69f9730fb0b892af614df09f2afd2413b8e028e5b3", kill_on_drop: false }`
[INFO] [stdout] d808c211a105473ac0d95b69f9730fb0b892af614df09f2afd2413b8e028e5b3
