[INFO] cloning repository https://github.com/marcusbuffett/ripper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/marcusbuffett/ripper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcusbuffett%2Fripper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcusbuffett%2Fripper'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9e47cb89567b5484a576404331d5f3c11d22d7b8
[INFO] checking marcusbuffett/ripper against try#8ac0915e346f9a2e49ca3951b642c55bd7d1eaab for pr-158447
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcusbuffett%2Fripper" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/marcusbuffett/ripper
[INFO] finished tweaking git repo https://github.com/marcusbuffett/ripper
[INFO] tweaked toml for git repo https://github.com/marcusbuffett/ripper written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/marcusbuffett/ripper on toolchain 8ac0915e346f9a2e49ca3951b642c55bd7d1eaab
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8ac0915e346f9a2e49ca3951b642c55bd7d1eaab" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/marcusbuffett/ripper already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8ac0915e346f9a2e49ca3951b642c55bd7d1eaab" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking marcusbuffett/ripper against try#8ac0915e346f9a2e49ca3951b642c55bd7d1eaab for pr-158447
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarcusbuffett%2Fripper" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/marcusbuffett/ripper
[INFO] finished tweaking git repo https://github.com/marcusbuffett/ripper
[INFO] tweaked toml for git repo https://github.com/marcusbuffett/ripper written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/marcusbuffett/ripper on toolchain 8ac0915e346f9a2e49ca3951b642c55bd7d1eaab
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8ac0915e346f9a2e49ca3951b642c55bd7d1eaab" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/marcusbuffett/ripper already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8ac0915e346f9a2e49ca3951b642c55bd7d1eaab" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-ident v1.0.13
[INFO] [stderr]   Downloaded serde_derive v1.0.210
[INFO] [stderr]   Downloaded serde v1.0.210
[INFO] [stderr]   Downloaded syn v2.0.79
[INFO] [stderr]   Downloaded regex v1.11.0
[INFO] [stderr]   Downloaded regex-automata v0.4.8
[INFO] [stderr]   Downloaded libc v0.2.159
[INFO] [stderr]   Downloaded csv v1.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] ceddd2178a9d0541072bd7ebb92b45d9a3b5cc5e30f1abe86eb32863e9b049e9
[INFO] running `Command { std: "docker" "start" "ceddd2178a9d0541072bd7ebb92b45d9a3b5cc5e30f1abe86eb32863e9b049e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ceddd2178a9d0541072bd7ebb92b45d9a3b5cc5e30f1abe86eb32863e9b049e9" "/opt/rustwide/cargo-home/bin/cargo" "+8ac0915e346f9a2e49ca3951b642c55bd7d1eaab" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ceddd2178a9d0541072bd7ebb92b45d9a3b5cc5e30f1abe86eb32863e9b049e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ceddd2178a9d0541072bd7ebb92b45d9a3b5cc5e30f1abe86eb32863e9b049e9" "/opt/rustwide/cargo-home/bin/cargo" "+8ac0915e346f9a2e49ca3951b642c55bd7d1eaab" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling libc v0.2.159
[INFO] [stderr]     Checking once_cell v1.20.2
[INFO] [stderr]     Checking regex-syntax v0.8.5
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]    Compiling serde v1.0.210
[INFO] [stderr]     Checking overload v0.1.1
[INFO] [stderr]     Checking log v0.4.22
[INFO] [stderr]     Checking pin-project-lite v0.2.14
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]     Checking ryu v1.0.18
[INFO] [stderr]     Checking itoa v1.0.11
[INFO] [stderr]     Checking csv-core v0.1.11
[INFO] [stderr]     Checking nu-ansi-term v0.46.0
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]     Checking itertools v0.13.0
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.79
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking regex-automata v0.4.8
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking regex v1.11.0
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]     Checking csv v1.3.0
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking ripper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Rng`
[INFO] [stdout]  --> src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | use rand::{Rng, SeedableRng};
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashMap`
[INFO] [stdout]  --> src/lib.rs:9:26
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::{cell::RefCell, collections::HashMap};
[INFO] [stdout]   |                          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashMap`
[INFO] [stdout]  --> src/instance.rs:3:34
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::{BTreeMap, HashMap};
[INFO] [stdout]   |                                  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/instance.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::Arc`
[INFO] [stdout]  --> src/instance.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::sync::Arc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `antd::NominalAntd`
[INFO] [stdout]   --> src/lib.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use antd::NominalAntd;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/lib.rs:107:34
[INFO] [stdout]     |
[INFO] [stdout] 107 |                 .map(|(i, inst)| (i * inst.borrow().class_value()))
[INFO] [stdout]     |                                  ^                               ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 107 -                 .map(|(i, inst)| (i * inst.borrow().class_value()))
[INFO] [stdout] 107 +                 .map(|(i, inst)| i * inst.borrow().class_value())
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/lib.rs:116:34
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 .map(|(i, inst)| (i * inst.borrow().class_value()))
[INFO] [stdout]     |                                  ^                               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 116 -                 .map(|(i, inst)| (i * inst.borrow().class_value()))
[INFO] [stdout] 116 +                 .map(|(i, inst)| i * inst.borrow().class_value())
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/lib.rs:456:24
[INFO] [stdout]     |
[INFO] [stdout] 456 |         let accuracy = (num_correct as f64 / num_total as f64);
[INFO] [stdout]     |                        ^                                     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 456 -         let accuracy = (num_correct as f64 / num_total as f64);
[INFO] [stdout] 456 +         let accuracy = num_correct as f64 / num_total as f64;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sync::Arc`
[INFO] [stdout]    --> src/lib.rs:483:30
[INFO] [stdout]     |
[INFO] [stdout] 483 |     use std::{cell::RefCell, sync::Arc};
[INFO] [stdout]     |                              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `HashMap` and `HashSet`
[INFO] [stdout]    --> src/lib.rs:490:38
[INFO] [stdout]     |
[INFO] [stdout] 490 |     use std::collections::{BTreeSet, HashMap, HashSet};
[INFO] [stdout]     |                                      ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Rng`
[INFO] [stdout]  --> src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | use rand::{Rng, SeedableRng};
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::HashMap`
[INFO] [stdout]  --> src/lib.rs:9:26
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::{cell::RefCell, collections::HashMap};
[INFO] [stdout]   |                          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashMap`
[INFO] [stdout]  --> src/instance.rs:3:34
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::{BTreeMap, HashMap};
[INFO] [stdout]   |                                  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/instance.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::Arc`
[INFO] [stdout]  --> src/instance.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::sync::Arc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `antd::NominalAntd`
[INFO] [stdout]   --> src/lib.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use antd::NominalAntd;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `attribute::Attribute`
[INFO] [stdout]   --> src/lib.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use attribute::Attribute;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/lib.rs:107:34
[INFO] [stdout]     |
[INFO] [stdout] 107 |                 .map(|(i, inst)| (i * inst.borrow().class_value()))
[INFO] [stdout]     |                                  ^                               ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 107 -                 .map(|(i, inst)| (i * inst.borrow().class_value()))
[INFO] [stdout] 107 +                 .map(|(i, inst)| i * inst.borrow().class_value())
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/lib.rs:116:34
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 .map(|(i, inst)| (i * inst.borrow().class_value()))
[INFO] [stdout]     |                                  ^                               ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 116 -                 .map(|(i, inst)| (i * inst.borrow().class_value()))
[INFO] [stdout] 116 +                 .map(|(i, inst)| i * inst.borrow().class_value())
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/lib.rs:456:24
[INFO] [stdout]     |
[INFO] [stdout] 456 |         let accuracy = (num_correct as f64 / num_total as f64);
[INFO] [stdout]     |                        ^                                     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 456 -         let accuracy = (num_correct as f64 / num_total as f64);
[INFO] [stdout] 456 +         let accuracy = num_correct as f64 / num_total as f64;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/instance.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut dataset = self
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/rule.rs:207:32
[INFO] [stdout]     |
[INFO] [stdout] 207 |     pub fn clean_up(&mut self, data: &Instances) {
[INFO] [stdout]     |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/rule_stats.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |         index: usize,
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `uncovered`
[INFO] [stdout]    --> src/rule_stats.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |         uncovered: &Instances,
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_uncovered`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prev_rule_stats`
[INFO] [stdout]    --> src/rule_stats.rs:133:9
[INFO] [stdout]     |
[INFO] [stdout] 133 |         prev_rule_stats: &[Vec<f64>],
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prev_rule_stats`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp_fp_rate`
[INFO] [stdout]    --> src/rule_stats.rs:528:31
[INFO] [stdout]     |
[INFO] [stdout] 528 |     pub fn combined_dl(&self, exp_fp_rate: f64, predicted: f64) -> f64 {
[INFO] [stdout]     |                               ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_exp_fp_rate`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `predicted`
[INFO] [stdout]    --> src/rule_stats.rs:528:49
[INFO] [stdout]     |
[INFO] [stdout] 528 |     pub fn combined_dl(&self, exp_fp_rate: f64, predicted: f64) -> f64 {
[INFO] [stdout]     |                                                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_predicted`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:176:21
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let mut class_dist = normalize(&class_dist);
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `class`
[INFO] [stdout]    --> src/lib.rs:125:28
[INFO] [stdout]     |
[INFO] [stdout] 125 |         for (class_index, (class, count)) in class_frequencies.iter().enumerate() {
[INFO] [stdout]     |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_class`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]    --> src/lib.rs:164:14
[INFO] [stdout]     |
[INFO] [stdout] 164 |         for (z, one_class) in self.ruleset_stats.iter_mut().enumerate() {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `xyz`
[INFO] [stdout]    --> src/lib.rs:169:18
[INFO] [stdout]     |
[INFO] [stdout] 169 |             for (xyz, class_dist) in one_class
[INFO] [stdout]     |                  ^^^ help: if this is intentional, prefix it with an underscore: `_xyz`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/instance.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut dataset = self
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:205:13
[INFO] [stdout]     |
[INFO] [stdout] 205 |         let mut has_positive = true;
[INFO] [stdout]     |             ----^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `last_grow_data` is assigned to, but never used
[INFO] [stdout]    --> src/lib.rs:202:13
[INFO] [stdout]     |
[INFO] [stdout] 202 |         let mut last_grow_data: Option<Instances> = None;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_last_grow_data` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `last_prune_data` is assigned to, but never used
[INFO] [stdout]    --> src/lib.rs:203:13
[INFO] [stdout]     |
[INFO] [stdout] 203 |         let mut last_prune_data: Option<Instances> = None;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_last_prune_data` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `has_positive`
[INFO] [stdout]    --> src/lib.rs:205:13
[INFO] [stdout]     |
[INFO] [stdout] 205 |         let mut has_positive = true;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_positive`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last_grow_data` is never read
[INFO] [stdout]    --> src/lib.rs:210:13
[INFO] [stdout]     |
[INFO] [stdout] 210 |             last_grow_data = Some(grow_data.clone());
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last_prune_data` is never read
[INFO] [stdout]    --> src/lib.rs:211:13
[INFO] [stdout]     |
[INFO] [stdout] 211 |             last_prune_data = Some(prune_data.clone());
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/rule.rs:207:32
[INFO] [stdout]     |
[INFO] [stdout] 207 |     pub fn clean_up(&mut self, data: &Instances) {
[INFO] [stdout]     |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:526:13
[INFO] [stdout]     |
[INFO] [stdout] 526 |         let mut dataset = Rc::new(RefCell::new(Instances::new(Rc::new(RefCell::new(
[INFO] [stdout]     |             ----^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:574:13
[INFO] [stdout]     |
[INFO] [stdout] 574 |         for i in 0..10 {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/rule_stats.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |         index: usize,
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `uncovered`
[INFO] [stdout]    --> src/rule_stats.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |         uncovered: &Instances,
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_uncovered`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prev_rule_stats`
[INFO] [stdout]    --> src/rule_stats.rs:133:9
[INFO] [stdout]     |
[INFO] [stdout] 133 |         prev_rule_stats: &[Vec<f64>],
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prev_rule_stats`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/rule_stats.rs:158:9
[INFO] [stdout]     |
[INFO] [stdout] 158 |         drop(ruleset);
[INFO] [stdout]     |         ^^^^^-------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut Vec<Rule>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 158 -         drop(ruleset);
[INFO] [stdout] 158 +         let _ = ruleset;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp_fp_rate`
[INFO] [stdout]    --> src/rule_stats.rs:528:31
[INFO] [stdout]     |
[INFO] [stdout] 528 |     pub fn combined_dl(&self, exp_fp_rate: f64, predicted: f64) -> f64 {
[INFO] [stdout]     |                               ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_exp_fp_rate`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `predicted`
[INFO] [stdout]    --> src/rule_stats.rs:528:49
[INFO] [stdout]     |
[INFO] [stdout] 528 |     pub fn combined_dl(&self, exp_fp_rate: f64, predicted: f64) -> f64 {
[INFO] [stdout]     |                                                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_predicted`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: feature `type_alias_impl_trait` is declared but not used
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_features)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:176:21
[INFO] [stdout]     |
[INFO] [stdout] 176 |                 let mut class_dist = normalize(&class_dist);
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `class`
[INFO] [stdout]    --> src/lib.rs:125:28
[INFO] [stdout]     |
[INFO] [stdout] 125 |         for (class_index, (class, count)) in class_frequencies.iter().enumerate() {
[INFO] [stdout]     |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_class`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]    --> src/lib.rs:164:14
[INFO] [stdout]     |
[INFO] [stdout] 164 |         for (z, one_class) in self.ruleset_stats.iter_mut().enumerate() {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `xyz`
[INFO] [stdout]    --> src/lib.rs:169:18
[INFO] [stdout]     |
[INFO] [stdout] 169 |             for (xyz, class_dist) in one_class
[INFO] [stdout]     |                  ^^^ help: if this is intentional, prefix it with an underscore: `_xyz`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:205:13
[INFO] [stdout]     |
[INFO] [stdout] 205 |         let mut has_positive = true;
[INFO] [stdout]     |             ----^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `last_grow_data` is assigned to, but never used
[INFO] [stdout]    --> src/lib.rs:202:13
[INFO] [stdout]     |
[INFO] [stdout] 202 |         let mut last_grow_data: Option<Instances> = None;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_last_grow_data` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `last_prune_data` is assigned to, but never used
[INFO] [stdout]    --> src/lib.rs:203:13
[INFO] [stdout]     |
[INFO] [stdout] 203 |         let mut last_prune_data: Option<Instances> = None;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_last_prune_data` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `has_positive`
[INFO] [stdout]    --> src/lib.rs:205:13
[INFO] [stdout]     |
[INFO] [stdout] 205 |         let mut has_positive = true;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_positive`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last_grow_data` is never read
[INFO] [stdout]    --> src/lib.rs:210:13
[INFO] [stdout]     |
[INFO] [stdout] 210 |             last_grow_data = Some(grow_data.clone());
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last_prune_data` is never read
[INFO] [stdout]    --> src/lib.rs:211:13
[INFO] [stdout]     |
[INFO] [stdout] 211 |             last_prune_data = Some(prune_data.clone());
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/rule_stats.rs:158:9
[INFO] [stdout]     |
[INFO] [stdout] 158 |         drop(ruleset);
[INFO] [stdout]     |         ^^^^^-------^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              argument has type `&mut Vec<Rule>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 158 -         drop(ruleset);
[INFO] [stdout] 158 +         let _ = ruleset;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: feature `type_alias_impl_trait` is declared but not used
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_features)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.75s
[INFO] running `Command { std: "docker" "inspect" "ceddd2178a9d0541072bd7ebb92b45d9a3b5cc5e30f1abe86eb32863e9b049e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ceddd2178a9d0541072bd7ebb92b45d9a3b5cc5e30f1abe86eb32863e9b049e9", kill_on_drop: false }`
[INFO] [stdout] ceddd2178a9d0541072bd7ebb92b45d9a3b5cc5e30f1abe86eb32863e9b049e9
