Dec 18 08:07:21.487 INFO checking CloneRob/iron_woods against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 08:07:21.487 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/CloneRob/iron_woods:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 08:07:21.994 INFO [stdout] d9ebf76f2e0736d880b61ffae16daf58fab4c2474267182830fd2d8dcfa283e9
Dec 18 08:07:21.996 INFO running `"docker" "start" "-a" "d9ebf76f2e0736d880b61ffae16daf58fab4c2474267182830fd2d8dcfa283e9"`
Dec 18 08:07:23.860 INFO [stderr]     Checking iron_woods v0.1.0 (/opt/crater/workdir)
Dec 18 08:07:24.284 INFO [stderr] warning: unused import: `std::collections::HashMap`
Dec 18 08:07:24.284 INFO [stderr]  --> src/main.rs:1:5
Dec 18 08:07:24.284 INFO [stderr]   |
Dec 18 08:07:24.284 INFO [stderr] 1 | use std::collections::HashMap;
Dec 18 08:07:24.284 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.284 INFO [stderr]   |
Dec 18 08:07:24.284 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 08:07:24.284 INFO [stderr] 
Dec 18 08:07:24.284 INFO [stderr] warning: unused import: `std::cmp`
Dec 18 08:07:24.284 INFO [stderr]  --> src/feature/mod.rs:1:5
Dec 18 08:07:24.284 INFO [stderr]   |
Dec 18 08:07:24.284 INFO [stderr] 1 | use std::cmp;
Dec 18 08:07:24.284 INFO [stderr]   |     ^^^^^^^^
Dec 18 08:07:24.284 INFO [stderr] 
Dec 18 08:07:24.284 INFO [stderr] warning: unused import: `Hash`
Dec 18 08:07:24.284 INFO [stderr]  --> src/feature/mod.rs:3:17
Dec 18 08:07:24.284 INFO [stderr]   |
Dec 18 08:07:24.284 INFO [stderr] 3 | use std::hash::{Hash, Hasher};
Dec 18 08:07:24.284 INFO [stderr]   |                 ^^^^
Dec 18 08:07:24.284 INFO [stderr] 
Dec 18 08:07:24.284 INFO [stderr] warning: unused import: `std::iter::FromIterator`
Dec 18 08:07:24.284 INFO [stderr]  --> src/feature/mod.rs:4:5
Dec 18 08:07:24.284 INFO [stderr]   |
Dec 18 08:07:24.284 INFO [stderr] 4 | use std::iter::FromIterator;
Dec 18 08:07:24.284 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.284 INFO [stderr] 
Dec 18 08:07:24.284 INFO [stderr] warning: unused imports: `Index`, `RangeFrom`, `RangeTo`
Dec 18 08:07:24.284 INFO [stderr]  --> src/feature/mod.rs:5:16
Dec 18 08:07:24.284 INFO [stderr]   |
Dec 18 08:07:24.284 INFO [stderr] 5 | use std::ops::{Index, RangeTo, RangeFrom};
Dec 18 08:07:24.284 INFO [stderr]   |                ^^^^^  ^^^^^^^  ^^^^^^^^^
Dec 18 08:07:24.284 INFO [stderr] 
Dec 18 08:07:24.284 INFO [stderr] warning: unused import: `HashSet`
Dec 18 08:07:24.284 INFO [stderr]  --> src/feature/mod.rs:6:24
Dec 18 08:07:24.284 INFO [stderr]   |
Dec 18 08:07:24.284 INFO [stderr] 6 | use std::collections::{HashSet, HashMap};
Dec 18 08:07:24.284 INFO [stderr]   |                        ^^^^^^^
Dec 18 08:07:24.284 INFO [stderr] 
Dec 18 08:07:24.341 INFO [stderr] warning: unused import: `std::collections::HashMap`
Dec 18 08:07:24.341 INFO [stderr]  --> src/main.rs:1:5
Dec 18 08:07:24.341 INFO [stderr]   |
Dec 18 08:07:24.341 INFO [stderr] 1 | use std::collections::HashMap;
Dec 18 08:07:24.341 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.341 INFO [stderr]   |
Dec 18 08:07:24.341 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 08:07:24.341 INFO [stderr] 
Dec 18 08:07:24.341 INFO [stderr] warning: unused import: `std::cmp`
Dec 18 08:07:24.341 INFO [stderr]  --> src/feature/mod.rs:1:5
Dec 18 08:07:24.341 INFO [stderr]   |
Dec 18 08:07:24.341 INFO [stderr] 1 | use std::cmp;
Dec 18 08:07:24.341 INFO [stderr]   |     ^^^^^^^^
Dec 18 08:07:24.341 INFO [stderr] 
Dec 18 08:07:24.341 INFO [stderr] warning: unused import: `Hash`
Dec 18 08:07:24.341 INFO [stderr]  --> src/feature/mod.rs:3:17
Dec 18 08:07:24.341 INFO [stderr]   |
Dec 18 08:07:24.341 INFO [stderr] 3 | use std::hash::{Hash, Hasher};
Dec 18 08:07:24.341 INFO [stderr]   |                 ^^^^
Dec 18 08:07:24.341 INFO [stderr] 
Dec 18 08:07:24.341 INFO [stderr] warning: unused import: `std::iter::FromIterator`
Dec 18 08:07:24.341 INFO [stderr]  --> src/feature/mod.rs:4:5
Dec 18 08:07:24.341 INFO [stderr]   |
Dec 18 08:07:24.341 INFO [stderr] 4 | use std::iter::FromIterator;
Dec 18 08:07:24.341 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.341 INFO [stderr] 
Dec 18 08:07:24.341 INFO [stderr] warning: unused imports: `Index`, `RangeFrom`, `RangeTo`
Dec 18 08:07:24.341 INFO [stderr]  --> src/feature/mod.rs:5:16
Dec 18 08:07:24.341 INFO [stderr]   |
Dec 18 08:07:24.341 INFO [stderr] 5 | use std::ops::{Index, RangeTo, RangeFrom};
Dec 18 08:07:24.341 INFO [stderr]   |                ^^^^^  ^^^^^^^  ^^^^^^^^^
Dec 18 08:07:24.341 INFO [stderr] 
Dec 18 08:07:24.341 INFO [stderr] warning: unused import: `HashSet`
Dec 18 08:07:24.341 INFO [stderr]  --> src/feature/mod.rs:6:24
Dec 18 08:07:24.341 INFO [stderr]   |
Dec 18 08:07:24.341 INFO [stderr] 6 | use std::collections::{HashSet, HashMap};
Dec 18 08:07:24.341 INFO [stderr]   |                        ^^^^^^^
Dec 18 08:07:24.341 INFO [stderr] 
Dec 18 08:07:24.412 INFO [stderr] warning: unused import: `Hasher`
Dec 18 08:07:24.412 INFO [stderr]  --> src/feature/mod.rs:3:23
Dec 18 08:07:24.412 INFO [stderr]   |
Dec 18 08:07:24.412 INFO [stderr] 3 | use std::hash::{Hash, Hasher};
Dec 18 08:07:24.412 INFO [stderr]   |                       ^^^^^^
Dec 18 08:07:24.412 INFO [stderr] 
Dec 18 08:07:24.428 INFO [stderr] warning: unused variable: `value_index`
Dec 18 08:07:24.428 INFO [stderr]   --> src/decision_tree/mod.rs:33:18
Dec 18 08:07:24.428 INFO [stderr]    |
Dec 18 08:07:24.428 INFO [stderr] 33 |             for (value_index, value) in feature.iter().enumerate() {
Dec 18 08:07:24.428 INFO [stderr]    |                  ^^^^^^^^^^^ help: consider using `_value_index` instead
Dec 18 08:07:24.428 INFO [stderr]    |
Dec 18 08:07:24.428 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 08:07:24.428 INFO [stderr] 
Dec 18 08:07:24.428 INFO [stderr] warning: unused variable: `depth`
Dec 18 08:07:24.428 INFO [stderr]   --> src/decision_tree/mod.rs:30:49
Dec 18 08:07:24.428 INFO [stderr]    |
Dec 18 08:07:24.428 INFO [stderr] 30 |     fn build_tree(&mut self, dataset: &Dataset, depth: usize) -> DecisionTree {
Dec 18 08:07:24.428 INFO [stderr]    |                                                 ^^^^^ help: consider using `_depth` instead
Dec 18 08:07:24.428 INFO [stderr] 
Dec 18 08:07:24.428 INFO [stderr] warning: unused variable: `data`
Dec 18 08:07:24.428 INFO [stderr]   --> src/decision_tree/mod.rs:51:34
Dec 18 08:07:24.428 INFO [stderr]    |
Dec 18 08:07:24.428 INFO [stderr] 51 |     fn argmin_cost<D: Splitable>(data: D) -> (f32, usize, Value) {
Dec 18 08:07:24.428 INFO [stderr]    |                                  ^^^^ help: consider using `_data` instead
Dec 18 08:07:24.428 INFO [stderr] 
Dec 18 08:07:24.469 INFO [stderr] warning: field is never used: `root`
Dec 18 08:07:24.469 INFO [stderr]  --> src/decision_tree/mod.rs:7:5
Dec 18 08:07:24.469 INFO [stderr]   |
Dec 18 08:07:24.469 INFO [stderr] 7 |     root: Option<DecisionNode>,
Dec 18 08:07:24.469 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.469 INFO [stderr]   |
Dec 18 08:07:24.469 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 08:07:24.469 INFO [stderr] 
Dec 18 08:07:24.469 INFO [stderr] warning: field is never used: `min_split`
Dec 18 08:07:24.469 INFO [stderr]  --> src/decision_tree/mod.rs:8:5
Dec 18 08:07:24.469 INFO [stderr]   |
Dec 18 08:07:24.469 INFO [stderr] 8 |     min_split: usize,
Dec 18 08:07:24.469 INFO [stderr]   |     ^^^^^^^^^^^^^^^^
Dec 18 08:07:24.469 INFO [stderr] 
Dec 18 08:07:24.469 INFO [stderr] warning: field is never used: `min_impurity`
Dec 18 08:07:24.469 INFO [stderr]  --> src/decision_tree/mod.rs:9:5
Dec 18 08:07:24.469 INFO [stderr]   |
Dec 18 08:07:24.469 INFO [stderr] 9 |     min_impurity: f32,
Dec 18 08:07:24.469 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.469 INFO [stderr] 
Dec 18 08:07:24.469 INFO [stderr] warning: field is never used: `max_depth`
Dec 18 08:07:24.469 INFO [stderr]   --> src/decision_tree/mod.rs:10:5
Dec 18 08:07:24.469 INFO [stderr]    |
Dec 18 08:07:24.469 INFO [stderr] 10 |     max_depth: usize,
Dec 18 08:07:24.469 INFO [stderr]    |     ^^^^^^^^^^^^^^^^
Dec 18 08:07:24.469 INFO [stderr] 
Dec 18 08:07:24.469 INFO [stderr] warning: field is never used: `cost_fn`
Dec 18 08:07:24.469 INFO [stderr]   --> src/decision_tree/mod.rs:11:5
Dec 18 08:07:24.469 INFO [stderr]    |
Dec 18 08:07:24.469 INFO [stderr] 11 |     cost_fn: fn(&[f32]) -> f32,
Dec 18 08:07:24.469 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.469 INFO [stderr] 
Dec 18 08:07:24.469 INFO [stderr] warning: field is never used: `leaf_fn`
Dec 18 08:07:24.469 INFO [stderr]   --> src/decision_tree/mod.rs:12:5
Dec 18 08:07:24.469 INFO [stderr]    |
Dec 18 08:07:24.469 INFO [stderr] 12 |     leaf_fn: fn() -> f32,
Dec 18 08:07:24.469 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.469 INFO [stderr] 
Dec 18 08:07:24.469 INFO [stderr] warning: method is never used: `build_tree`
Dec 18 08:07:24.469 INFO [stderr]   --> src/decision_tree/mod.rs:30:5
Dec 18 08:07:24.469 INFO [stderr]    |
Dec 18 08:07:24.469 INFO [stderr] 30 |     fn build_tree(&mut self, dataset: &Dataset, depth: usize) -> DecisionTree {
Dec 18 08:07:24.469 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.469 INFO [stderr] 
Dec 18 08:07:24.473 INFO [stderr] warning: method is never used: `argmin_cost`
Dec 18 08:07:24.473 INFO [stderr]   --> src/decision_tree/mod.rs:51:5
Dec 18 08:07:24.473 INFO [stderr]    |
Dec 18 08:07:24.473 INFO [stderr] 51 |     fn argmin_cost<D: Splitable>(data: D) -> (f32, usize, Value) {
Dec 18 08:07:24.473 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.473 INFO [stderr] 
Dec 18 08:07:24.477 INFO [stderr] warning: unused import: `Hasher`
Dec 18 08:07:24.477 INFO [stderr]  --> src/feature/mod.rs:3:23
Dec 18 08:07:24.477 INFO [stderr]   |
Dec 18 08:07:24.477 INFO [stderr] 3 | use std::hash::{Hash, Hasher};
Dec 18 08:07:24.478 INFO [stderr]   |                       ^^^^^^
Dec 18 08:07:24.478 INFO [stderr] 
Dec 18 08:07:24.491 INFO [stderr] warning: unused variable: `value_index`
Dec 18 08:07:24.491 INFO [stderr]   --> src/decision_tree/mod.rs:33:18
Dec 18 08:07:24.491 INFO [stderr]    |
Dec 18 08:07:24.491 INFO [stderr] 33 |             for (value_index, value) in feature.iter().enumerate() {
Dec 18 08:07:24.491 INFO [stderr]    |                  ^^^^^^^^^^^ help: consider using `_value_index` instead
Dec 18 08:07:24.491 INFO [stderr]    |
Dec 18 08:07:24.491 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 08:07:24.491 INFO [stderr] 
Dec 18 08:07:24.491 INFO [stderr] warning: unused variable: `depth`
Dec 18 08:07:24.491 INFO [stderr]   --> src/decision_tree/mod.rs:30:49
Dec 18 08:07:24.491 INFO [stderr]    |
Dec 18 08:07:24.491 INFO [stderr] 30 |     fn build_tree(&mut self, dataset: &Dataset, depth: usize) -> DecisionTree {
Dec 18 08:07:24.491 INFO [stderr]    |                                                 ^^^^^ help: consider using `_depth` instead
Dec 18 08:07:24.491 INFO [stderr] 
Dec 18 08:07:24.491 INFO [stderr] warning: unused variable: `data`
Dec 18 08:07:24.491 INFO [stderr]   --> src/decision_tree/mod.rs:51:34
Dec 18 08:07:24.491 INFO [stderr]    |
Dec 18 08:07:24.491 INFO [stderr] 51 |     fn argmin_cost<D: Splitable>(data: D) -> (f32, usize, Value) {
Dec 18 08:07:24.491 INFO [stderr]    |                                  ^^^^ help: consider using `_data` instead
Dec 18 08:07:24.491 INFO [stderr] 
Dec 18 08:07:24.556 INFO [stderr] warning: field is never used: `root`
Dec 18 08:07:24.556 INFO [stderr]  --> src/decision_tree/mod.rs:7:5
Dec 18 08:07:24.556 INFO [stderr]   |
Dec 18 08:07:24.556 INFO [stderr] 7 |     root: Option<DecisionNode>,
Dec 18 08:07:24.556 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.556 INFO [stderr]   |
Dec 18 08:07:24.556 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 08:07:24.556 INFO [stderr] 
Dec 18 08:07:24.556 INFO [stderr] warning: field is never used: `min_split`
Dec 18 08:07:24.556 INFO [stderr]  --> src/decision_tree/mod.rs:8:5
Dec 18 08:07:24.556 INFO [stderr]   |
Dec 18 08:07:24.556 INFO [stderr] 8 |     min_split: usize,
Dec 18 08:07:24.556 INFO [stderr]   |     ^^^^^^^^^^^^^^^^
Dec 18 08:07:24.556 INFO [stderr] 
Dec 18 08:07:24.556 INFO [stderr] warning: field is never used: `min_impurity`
Dec 18 08:07:24.556 INFO [stderr]  --> src/decision_tree/mod.rs:9:5
Dec 18 08:07:24.556 INFO [stderr]   |
Dec 18 08:07:24.556 INFO [stderr] 9 |     min_impurity: f32,
Dec 18 08:07:24.556 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.556 INFO [stderr] 
Dec 18 08:07:24.556 INFO [stderr] warning: field is never used: `max_depth`
Dec 18 08:07:24.556 INFO [stderr]   --> src/decision_tree/mod.rs:10:5
Dec 18 08:07:24.556 INFO [stderr]    |
Dec 18 08:07:24.556 INFO [stderr] 10 |     max_depth: usize,
Dec 18 08:07:24.556 INFO [stderr]    |     ^^^^^^^^^^^^^^^^
Dec 18 08:07:24.556 INFO [stderr] 
Dec 18 08:07:24.556 INFO [stderr] warning: field is never used: `cost_fn`
Dec 18 08:07:24.556 INFO [stderr]   --> src/decision_tree/mod.rs:11:5
Dec 18 08:07:24.556 INFO [stderr]    |
Dec 18 08:07:24.556 INFO [stderr] 11 |     cost_fn: fn(&[f32]) -> f32,
Dec 18 08:07:24.556 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.556 INFO [stderr] 
Dec 18 08:07:24.556 INFO [stderr] warning: field is never used: `leaf_fn`
Dec 18 08:07:24.556 INFO [stderr]   --> src/decision_tree/mod.rs:12:5
Dec 18 08:07:24.556 INFO [stderr]    |
Dec 18 08:07:24.557 INFO [stderr] 12 |     leaf_fn: fn() -> f32,
Dec 18 08:07:24.557 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.557 INFO [stderr] 
Dec 18 08:07:24.557 INFO [stderr] warning: method is never used: `build_tree`
Dec 18 08:07:24.557 INFO [stderr]   --> src/decision_tree/mod.rs:30:5
Dec 18 08:07:24.557 INFO [stderr]    |
Dec 18 08:07:24.557 INFO [stderr] 30 |     fn build_tree(&mut self, dataset: &Dataset, depth: usize) -> DecisionTree {
Dec 18 08:07:24.557 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.557 INFO [stderr] 
Dec 18 08:07:24.557 INFO [stderr] warning: method is never used: `argmin_cost`
Dec 18 08:07:24.557 INFO [stderr]   --> src/decision_tree/mod.rs:51:5
Dec 18 08:07:24.557 INFO [stderr]    |
Dec 18 08:07:24.557 INFO [stderr] 51 |     fn argmin_cost<D: Splitable>(data: D) -> (f32, usize, Value) {
Dec 18 08:07:24.557 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:07:24.557 INFO [stderr] 
Dec 18 08:07:24.608 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
Dec 18 08:07:25.273 INFO running `"docker" "inspect" "d9ebf76f2e0736d880b61ffae16daf58fab4c2474267182830fd2d8dcfa283e9"`
Dec 18 08:07:25.395 INFO running `"docker" "rm" "-f" "d9ebf76f2e0736d880b61ffae16daf58fab4c2474267182830fd2d8dcfa283e9"`
Dec 18 08:07:25.540 INFO [stdout] d9ebf76f2e0736d880b61ffae16daf58fab4c2474267182830fd2d8dcfa283e9