[INFO] cloning repository https://github.com/fdietze/chromogene
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fdietze/chromogene" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffdietze%2Fchromogene"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffdietze%2Fchromogene'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 391ebde42589af9af8b27a48cf7d465bc933c1f0
[INFO] checking fdietze/chromogene against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffdietze%2Fchromogene" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fdietze/chromogene on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/fdietze/chromogene
[INFO] finished tweaking git repo https://github.com/fdietze/chromogene
[INFO] tweaked toml for git repo https://github.com/fdietze/chromogene written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/fdietze/chromogene already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating git repository `git://github.com/BurntSushi/rust-stats`
[INFO] [stderr] error: the lock file /workspace/builds/worker-6/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `git://github.com/BurntSushi/rust-stats`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "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] b6342d80cf73dded5e8cb1b612201341abc7b8e49a2dd405c6bbce6a6d4fd334
[INFO] running `"docker" "start" "-a" "b6342d80cf73dded5e8cb1b612201341abc7b8e49a2dd405c6bbce6a6d4fd334"`
[INFO] [stderr]     Checking approx v0.1.1
[INFO] [stderr]     Checking num-integer v0.1.41
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking streaming-stats v0.2.2 (git://github.com/BurntSushi/rust-stats#2368a9dd)
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]    Compiling palette v0.2.1
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-iter v0.1.39
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking chromogene v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:54:21
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let direction = try!(line.next().ok_or("expected string").and_then(|string| {
[INFO] [stderr]    |                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:69:16
[INFO] [stderr]    |
[INFO] [stderr] 69 |     let stat = try!(line.next().ok_or("expected string").and_then(|string| {
[INFO] [stderr]    |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:79:21
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let parameter = try!(line.next().ok_or("expected string").and_then(|string| {
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Lch`, `Rgb`
[INFO] [stderr]   --> src/main.rs:12:20
[INFO] [stderr]    |
[INFO] [stderr] 12 | use palette::{Lab, Lch, Rgb};
[INFO] [stderr]    |                    ^^^  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `palette::Limited`
[INFO] [stderr]   --> src/main.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use palette::Limited;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Rand`, `Rng`
[INFO] [stderr]   --> src/main.rs:17:24
[INFO] [stderr]    |
[INFO] [stderr] 17 | use rand::{thread_rng, Rng, Rand};
[INFO] [stderr]    |                        ^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `IndependentSample`, `Normal`
[INFO] [stderr]   --> src/main.rs:18:27
[INFO] [stderr]    |
[INFO] [stderr] 18 | use rand::distributions::{Normal, IndependentSample};
[INFO] [stderr]    |                           ^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::distributions::exponential::Exp1`
[INFO] [stderr]   --> src/main.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | use rand::distributions::exponential::Exp1;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `mean`, `stddev`
[INFO] [stderr]   --> src/main.rs:21:13
[INFO] [stderr]    |
[INFO] [stderr] 21 | use stats::{stddev, mean};
[INFO] [stderr]    |             ^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Lch`
[INFO] [stderr]  --> src/fitness.rs:1:20
[INFO] [stderr]   |
[INFO] [stderr] 1 | use palette::{Lab, Lch};
[INFO] [stderr]   |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `FitnessData`, `StatValues`
[INFO] [stderr]   --> src/main.rs:25:46
[INFO] [stderr]    |
[INFO] [stderr] 25 | use fitness::{ColorSchemeProblemDescription, FitnessData, StatValues};
[INFO] [stderr]    |                                              ^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::distributions::IndependentSample`
[INFO] [stderr]  --> src/genetic.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::distributions::IndependentSample;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ProblemDescription`
[INFO] [stderr]   --> src/main.rs:32:37
[INFO] [stderr]    |
[INFO] [stderr] 32 | use genetic::{Population, Genotype, ProblemDescription};
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:54:21
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let direction = try!(line.next().ok_or("expected string").and_then(|string| {
[INFO] [stderr]    |                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:69:16
[INFO] [stderr]    |
[INFO] [stderr] 69 |     let stat = try!(line.next().ok_or("expected string").and_then(|string| {
[INFO] [stderr]    |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/main.rs:79:21
[INFO] [stderr]    |
[INFO] [stderr] 79 |     let parameter = try!(line.next().ok_or("expected string").and_then(|string| {
[INFO] [stderr]    |                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Lch`, `Rgb`
[INFO] [stderr]   --> src/main.rs:12:20
[INFO] [stderr]    |
[INFO] [stderr] 12 | use palette::{Lab, Lch, Rgb};
[INFO] [stderr]    |                    ^^^  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `palette::Limited`
[INFO] [stderr]   --> src/main.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use palette::Limited;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Rand`, `Rng`
[INFO] [stderr]   --> src/main.rs:17:24
[INFO] [stderr]    |
[INFO] [stderr] 17 | use rand::{thread_rng, Rng, Rand};
[INFO] [stderr]    |                        ^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `IndependentSample`, `Normal`
[INFO] [stderr]   --> src/main.rs:18:27
[INFO] [stderr]    |
[INFO] [stderr] 18 | use rand::distributions::{Normal, IndependentSample};
[INFO] [stderr]    |                           ^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::distributions::exponential::Exp1`
[INFO] [stderr]   --> src/main.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | use rand::distributions::exponential::Exp1;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `mean`, `stddev`
[INFO] [stderr]   --> src/main.rs:21:13
[INFO] [stderr]    |
[INFO] [stderr] 21 | use stats::{stddev, mean};
[INFO] [stderr]    |             ^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Lch`
[INFO] [stderr]  --> src/fitness.rs:1:20
[INFO] [stderr]   |
[INFO] [stderr] 1 | use palette::{Lab, Lch};
[INFO] [stderr]   |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `FitnessData`, `StatValues`
[INFO] [stderr]   --> src/main.rs:25:46
[INFO] [stderr]    |
[INFO] [stderr] 25 | use fitness::{ColorSchemeProblemDescription, FitnessData, StatValues};
[INFO] [stderr]    |                                              ^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::distributions::IndependentSample`
[INFO] [stderr]  --> src/genetic.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use rand::distributions::IndependentSample;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ProblemDescription`
[INFO] [stderr]   --> src/main.rs:32:37
[INFO] [stderr]    |
[INFO] [stderr] 32 | use genetic::{Population, Genotype, ProblemDescription};
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Add`
[INFO] [stderr]   --> src/main.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::ops::Add;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Rand`
[INFO] [stderr]  --> src/genetic.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use rand::{Rng, Rand};
[INFO] [stderr]   |                 ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `run`
[INFO] [stderr]    --> src/main.rs:133:9
[INFO] [stderr]     |
[INFO] [stderr] 133 |     for run in 0..runs {
[INFO] [stderr]     |         ^^^ help: consider prefixing with an underscore: `_run`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `fixed_dist`
[INFO] [stderr]    --> src/colorscheme.rs:107:13
[INFO] [stderr]     |
[INFO] [stderr] 107 |         let fixed_dist: Vec<(&Lab, &Lab, f32)> = descr.fixed_colors
[INFO] [stderr]     |             ^^^^^^^^^^ help: consider prefixing with an underscore: `_fixed_dist`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `free_dist`
[INFO] [stderr]    --> src/colorscheme.rs:118:13
[INFO] [stderr]     |
[INFO] [stderr] 118 |         let free_dist: Vec<(&Lab, &Lab, f32)> = self.free_colors
[INFO] [stderr]     |             ^^^^^^^^^ help: consider prefixing with an underscore: `_free_dist`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rng`
[INFO] [stderr]    --> src/colorscheme.rs:193:54
[INFO] [stderr]     |
[INFO] [stderr] 193 |     fn crossover<R: Rng>(&self, other: &ColorScheme, rng: &mut R) -> ColorScheme {
[INFO] [stderr]     |                                                      ^^^ help: consider prefixing with an underscore: `_rng`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_col_dist`
[INFO] [stderr]   --> src/color.rs:75:1
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn print_col_dist(coldist: (&Lab, &Lab, f32)) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Change`
[INFO] [stderr]   --> src/main.rs:46:1
[INFO] [stderr]    |
[INFO] [stderr] 46 | enum Change {
[INFO] [stderr]    | ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `iter_arith` has been stable since 1.11.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(iter_arith)]
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Add`
[INFO] [stderr]   --> src/main.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::ops::Add;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Rand`
[INFO] [stderr]  --> src/genetic.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use rand::{Rng, Rand};
[INFO] [stderr]   |                 ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `run`
[INFO] [stderr]    --> src/main.rs:133:9
[INFO] [stderr]     |
[INFO] [stderr] 133 |     for run in 0..runs {
[INFO] [stderr]     |         ^^^ help: consider prefixing with an underscore: `_run`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `fixed_dist`
[INFO] [stderr]    --> src/colorscheme.rs:107:13
[INFO] [stderr]     |
[INFO] [stderr] 107 |         let fixed_dist: Vec<(&Lab, &Lab, f32)> = descr.fixed_colors
[INFO] [stderr]     |             ^^^^^^^^^^ help: consider prefixing with an underscore: `_fixed_dist`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `free_dist`
[INFO] [stderr]    --> src/colorscheme.rs:118:13
[INFO] [stderr]     |
[INFO] [stderr] 118 |         let free_dist: Vec<(&Lab, &Lab, f32)> = self.free_colors
[INFO] [stderr]     |             ^^^^^^^^^ help: consider prefixing with an underscore: `_free_dist`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rng`
[INFO] [stderr]    --> src/colorscheme.rs:193:54
[INFO] [stderr]     |
[INFO] [stderr] 193 |     fn crossover<R: Rng>(&self, other: &ColorScheme, rng: &mut R) -> ColorScheme {
[INFO] [stderr]     |                                                      ^^^ help: consider prefixing with an underscore: `_rng`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_col_dist`
[INFO] [stderr]   --> src/color.rs:75:1
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn print_col_dist(coldist: (&Lab, &Lab, f32)) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Change`
[INFO] [stderr]   --> src/main.rs:46:1
[INFO] [stderr]    |
[INFO] [stderr] 46 | enum Change {
[INFO] [stderr]    | ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `iter_arith` has been stable since 1.11.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(iter_arith)]
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.67s
[INFO] running `"docker" "inspect" "b6342d80cf73dded5e8cb1b612201341abc7b8e49a2dd405c6bbce6a6d4fd334"`
[INFO] running `"docker" "rm" "-f" "b6342d80cf73dded5e8cb1b612201341abc7b8e49a2dd405c6bbce6a6d4fd334"`
[INFO] [stdout] b6342d80cf73dded5e8cb1b612201341abc7b8e49a2dd405c6bbce6a6d4fd334