[INFO] cloning repository https://github.com/CloneRob/iron_woods
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CloneRob/iron_woods" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCloneRob%2Firon_woods"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCloneRob%2Firon_woods'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d892a15c6b4292bb45efb6a830c8b6afd5fe4ea3
[INFO] checking CloneRob/iron_woods against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCloneRob%2Firon_woods" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CloneRob/iron_woods on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/CloneRob/iron_woods
[INFO] finished tweaking git repo https://github.com/CloneRob/iron_woods
[INFO] tweaked toml for git repo https://github.com/CloneRob/iron_woods written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/CloneRob/iron_woods already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9fa2abdbf62914a505c898f76097ee0b269e274f806141a293337a81cb5f66f0
[INFO] running `"docker" "start" "-a" "9fa2abdbf62914a505c898f76097ee0b269e274f806141a293337a81cb5f66f0"`
[INFO] [stderr]     Checking iron_woods v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/feature/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Hasher`
[INFO] [stderr]  --> src/feature/mod.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::hash::{Hash, Hasher};
[INFO] [stderr]   |                       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::FromIterator`
[INFO] [stderr]  --> src/feature/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::iter::FromIterator;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Index`, `RangeFrom`, `RangeTo`
[INFO] [stderr]  --> src/feature/mod.rs:5:16
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ops::{Index, RangeTo, RangeFrom};
[INFO] [stderr]   |                ^^^^^  ^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashSet`
[INFO] [stderr]  --> src/feature/mod.rs:6:24
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::{HashSet, HashMap};
[INFO] [stderr]   |                        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/feature/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Hasher`
[INFO] [stderr]  --> src/feature/mod.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::hash::{Hash, Hasher};
[INFO] [stderr]   |                       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::FromIterator`
[INFO] [stderr]  --> src/feature/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::iter::FromIterator;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Index`, `RangeFrom`, `RangeTo`
[INFO] [stderr]  --> src/feature/mod.rs:5:16
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ops::{Index, RangeTo, RangeFrom};
[INFO] [stderr]   |                ^^^^^  ^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashSet`
[INFO] [stderr]  --> src/feature/mod.rs:6:24
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::collections::{HashSet, HashMap};
[INFO] [stderr]   |                        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value_index`
[INFO] [stderr]   --> src/decision_tree/mod.rs:33:18
[INFO] [stderr]    |
[INFO] [stderr] 33 |             for (value_index, value) in feature.iter().enumerate() {
[INFO] [stderr]    |                  ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_value_index`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `depth`
[INFO] [stderr]   --> src/decision_tree/mod.rs:30:49
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn build_tree(&mut self, dataset: &Dataset, depth: usize) -> DecisionTree {
[INFO] [stderr]    |                                                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_depth`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/decision_tree/mod.rs:51:34
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn argmin_cost<D: Splitable>(data: D) -> (f32, usize, Value) {
[INFO] [stderr]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `root`
[INFO] [stderr]  --> src/decision_tree/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     root: Option<DecisionNode>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `min_split`
[INFO] [stderr]  --> src/decision_tree/mod.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     min_split: usize,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `min_impurity`
[INFO] [stderr]  --> src/decision_tree/mod.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     min_impurity: f32,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `max_depth`
[INFO] [stderr]   --> src/decision_tree/mod.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     max_depth: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `cost_fn`
[INFO] [stderr]   --> src/decision_tree/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     cost_fn: fn(&[f32]) -> f32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `leaf_fn`
[INFO] [stderr]   --> src/decision_tree/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     leaf_fn: fn() -> f32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `build_tree`
[INFO] [stderr]   --> src/decision_tree/mod.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn build_tree(&mut self, dataset: &Dataset, depth: usize) -> DecisionTree {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `argmin_cost`
[INFO] [stderr]   --> src/decision_tree/mod.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn argmin_cost<D: Splitable>(data: D) -> (f32, usize, Value) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value_index`
[INFO] [stderr]   --> src/decision_tree/mod.rs:33:18
[INFO] [stderr]    |
[INFO] [stderr] 33 |             for (value_index, value) in feature.iter().enumerate() {
[INFO] [stderr]    |                  ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_value_index`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `depth`
[INFO] [stderr]   --> src/decision_tree/mod.rs:30:49
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn build_tree(&mut self, dataset: &Dataset, depth: usize) -> DecisionTree {
[INFO] [stderr]    |                                                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_depth`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/decision_tree/mod.rs:51:34
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn argmin_cost<D: Splitable>(data: D) -> (f32, usize, Value) {
[INFO] [stderr]    |                                  ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `root`
[INFO] [stderr]  --> src/decision_tree/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     root: Option<DecisionNode>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `min_split`
[INFO] [stderr]  --> src/decision_tree/mod.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     min_split: usize,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `min_impurity`
[INFO] [stderr]  --> src/decision_tree/mod.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     min_impurity: f32,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `max_depth`
[INFO] [stderr]   --> src/decision_tree/mod.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     max_depth: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `cost_fn`
[INFO] [stderr]   --> src/decision_tree/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     cost_fn: fn(&[f32]) -> f32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `leaf_fn`
[INFO] [stderr]   --> src/decision_tree/mod.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     leaf_fn: fn() -> f32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `build_tree`
[INFO] [stderr]   --> src/decision_tree/mod.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn build_tree(&mut self, dataset: &Dataset, depth: usize) -> DecisionTree {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `argmin_cost`
[INFO] [stderr]   --> src/decision_tree/mod.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn argmin_cost<D: Splitable>(data: D) -> (f32, usize, Value) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `"docker" "inspect" "9fa2abdbf62914a505c898f76097ee0b269e274f806141a293337a81cb5f66f0"`
[INFO] running `"docker" "rm" "-f" "9fa2abdbf62914a505c898f76097ee0b269e274f806141a293337a81cb5f66f0"`
[INFO] [stdout] 9fa2abdbf62914a505c898f76097ee0b269e274f806141a293337a81cb5f66f0