[INFO] updating cached repository https://github.com/aditya2912/Random-Local-Search-In-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] f42f71ebd8888cdc541f05265c9bcbe461397c19
[INFO] checking aditya2912/Random-Local-Search-In-Rust against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faditya2912%2FRandom-Local-Search-In-Rust" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aditya2912/Random-Local-Search-In-Rust 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/aditya2912/Random-Local-Search-In-Rust
[INFO] finished tweaking git repo https://github.com/aditya2912/Random-Local-Search-In-Rust
[INFO] tweaked toml for git repo https://github.com/aditya2912/Random-Local-Search-In-Rust written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/aditya2912/Random-Local-Search-In-Rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] [stdout] 4c21d7ee2a97fd8b391510d84b543e185dec33a7501d66f034b5f38c0ee16dde
[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" "4c21d7ee2a97fd8b391510d84b543e185dec33a7501d66f034b5f38c0ee16dde"`
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking rust_dummy_project v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::f64::consts::E`
[INFO] [stderr]  --> src/neuron.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::f64::consts::E;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `sigmoid` is never read
[INFO] [stderr]   --> src/neuron.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 86 |     let mut sigmoid: f64 = 0f64;
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::f64::consts::E`
[INFO] [stderr]  --> src/neuron.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::f64::consts::E;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:106:13
[INFO] [stderr]     |
[INFO] [stderr] 106 |         let mut sig: f64 = sigmoid(self.u0.value);
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:114:13
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let mut sig: f64 = sigmoid(self.u0.value);
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]   --> src/neuron.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn empty() -> Unit {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/neuron.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn new(value: f64, gradient: f64) -> Unit {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `MultiplyGate`
[INFO] [stderr]   --> src/neuron.rs:21:12
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub struct MultiplyGate {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]   --> src/neuron.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn empty() -> MultiplyGate {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `forward`
[INFO] [stderr]   --> src/neuron.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn forward(mut self, u0: Unit, u1: Unit) -> MultiplyGate {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `backwards`
[INFO] [stderr]   --> src/neuron.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn backwards(mut self) -> MultiplyGate {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `AddGate`
[INFO] [stderr]   --> src/neuron.rs:50:12
[INFO] [stderr]    |
[INFO] [stderr] 50 | pub struct AddGate {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]   --> src/neuron.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub fn empty() -> AddGate {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `forward`
[INFO] [stderr]   --> src/neuron.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn forward(mut self, u0: Unit, u1: Unit) -> AddGate {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `backward`
[INFO] [stderr]   --> src/neuron.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     pub fn backward(mut self) -> AddGate {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SigmoidGate`
[INFO] [stderr]   --> src/neuron.rs:79:12
[INFO] [stderr]    |
[INFO] [stderr] 79 | pub struct SigmoidGate {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `sigmoid`
[INFO] [stderr]   --> src/neuron.rs:85:8
[INFO] [stderr]    |
[INFO] [stderr] 85 | pub fn sigmoid(x: f64 ) -> f64 {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]   --> src/neuron.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn empty() -> SigmoidGate {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `forward`
[INFO] [stderr]    --> src/neuron.rs:104:5
[INFO] [stderr]     |
[INFO] [stderr] 104 |     pub fn forward(mut self, u0 : Unit) -> SigmoidGate {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `backward`
[INFO] [stderr]    --> src/neuron.rs:113:5
[INFO] [stderr]     |
[INFO] [stderr] 113 |     pub fn backward(mut self) -> SigmoidGate {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: module `neuronMod` should have a snake case name
[INFO] [stderr]  --> src/neuron.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | mod neuronMod {
[INFO] [stderr]   |     ^^^^^^^^^ help: convert the identifier to snake case: `neuron_mod`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 20 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `sigmoid` is never read
[INFO] [stderr]   --> src/neuron.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 86 |     let mut sigmoid: f64 = 0f64;
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:106:13
[INFO] [stderr]     |
[INFO] [stderr] 106 |         let mut sig: f64 = sigmoid(self.u0.value);
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:114:13
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let mut sig: f64 = sigmoid(self.u0.value);
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:126:14
[INFO] [stderr]     |
[INFO] [stderr] 126 |          let mut a: neuronMod::Unit = neuronMod::Unit::new(1.0, 2.0);
[INFO] [stderr]     |              ----^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:127:14
[INFO] [stderr]     |
[INFO] [stderr] 127 |          let mut b: neuronMod::Unit = neuronMod::Unit::new(2.0, 0.0);
[INFO] [stderr]     |              ----^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:128:14
[INFO] [stderr]     |
[INFO] [stderr] 128 |          let mut c: neuronMod::Unit = neuronMod::Unit::new(-3.0, 0.0);
[INFO] [stderr]     |              ----^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:129:14
[INFO] [stderr]     |
[INFO] [stderr] 129 |          let mut x: neuronMod::Unit = neuronMod::Unit::new(-1.0, 0.0);
[INFO] [stderr]     |              ----^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:130:14
[INFO] [stderr]     |
[INFO] [stderr] 130 |          let mut y: neuronMod::Unit = neuronMod::Unit::new(3.0, 0.0);
[INFO] [stderr]     |              ----^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:132:14
[INFO] [stderr]     |
[INFO] [stderr] 132 |          let mut mulg0: neuronMod::MultiplyGate = neuronMod::MultiplyGate::empty();
[INFO] [stderr]     |              ----^^^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:133:14
[INFO] [stderr]     |
[INFO] [stderr] 133 |          let mut mulg1: neuronMod::MultiplyGate = neuronMod::MultiplyGate::empty();
[INFO] [stderr]     |              ----^^^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:134:14
[INFO] [stderr]     |
[INFO] [stderr] 134 |          let mut addg0: neuronMod::AddGate = neuronMod::AddGate::empty();
[INFO] [stderr]     |              ----^^^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:135:14
[INFO] [stderr]     |
[INFO] [stderr] 135 |          let mut addg1: neuronMod::AddGate = neuronMod::AddGate::empty();
[INFO] [stderr]     |              ----^^^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:136:14
[INFO] [stderr]     |
[INFO] [stderr] 136 |          let mut sg0: neuronMod::SigmoidGate = neuronMod::SigmoidGate::empty();
[INFO] [stderr]     |              ----^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:138:14
[INFO] [stderr]     |
[INFO] [stderr] 138 |          let mut ax: neuronMod::MultiplyGate = mulg0.forward(a, x);
[INFO] [stderr]     |              ----^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:139:14
[INFO] [stderr]     |
[INFO] [stderr] 139 |          let mut by: neuronMod::MultiplyGate = mulg1.forward(b, y);
[INFO] [stderr]     |              ----^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:140:14
[INFO] [stderr]     |
[INFO] [stderr] 140 |          let mut axpby: neuronMod::AddGate = addg0.forward(ax.utop, by.utop);
[INFO] [stderr]     |              ----^^^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:141:14
[INFO] [stderr]     |
[INFO] [stderr] 141 |          let mut axpbypc: neuronMod::AddGate = addg1.forward(axpby.utop, c);
[INFO] [stderr]     |              ----^^^^^^^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/neuron.rs:142:14
[INFO] [stderr]     |
[INFO] [stderr] 142 |          let mut s: neuronMod::SigmoidGate = sg0.forward(axpbypc.utop);
[INFO] [stderr]     |              ----^
[INFO] [stderr]     |              |
[INFO] [stderr]     |              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `backwards`
[INFO] [stderr]   --> src/neuron.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn backwards(mut self) -> MultiplyGate {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `backward`
[INFO] [stderr]   --> src/neuron.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     pub fn backward(mut self) -> AddGate {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `backward`
[INFO] [stderr]    --> src/neuron.rs:113:5
[INFO] [stderr]     |
[INFO] [stderr] 113 |     pub fn backward(mut self) -> SigmoidGate {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: module `neuronMod` should have a snake case name
[INFO] [stderr]  --> src/neuron.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | mod neuronMod {
[INFO] [stderr]   |     ^^^^^^^^^ help: convert the identifier to snake case: `neuron_mod`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 23 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.02s
[INFO] running `"docker" "inspect" "4c21d7ee2a97fd8b391510d84b543e185dec33a7501d66f034b5f38c0ee16dde"`
[INFO] running `"docker" "rm" "-f" "4c21d7ee2a97fd8b391510d84b543e185dec33a7501d66f034b5f38c0ee16dde"`
[INFO] [stdout] 4c21d7ee2a97fd8b391510d84b543e185dec33a7501d66f034b5f38c0ee16dde