[INFO] crate genetic 0.2.1 is already in cache
[INFO] extracting crate genetic 0.2.1 into work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/reg/genetic/0.2.1
[INFO] extracting crate genetic 0.2.1 into work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/reg/genetic/0.2.1
[INFO] validating manifest of genetic-0.2.1 on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of genetic-0.2.1 on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing genetic-0.2.1
[INFO] finished frobbing genetic-0.2.1
[INFO] frobbed toml for genetic-0.2.1 written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/reg/genetic/0.2.1/Cargo.toml
[INFO] started frobbing genetic-0.2.1
[INFO] finished frobbing genetic-0.2.1
[INFO] frobbed toml for genetic-0.2.1 written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/reg/genetic/0.2.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking genetic-0.2.1 against master#f66e4697ae286985ddefc53c3a047614568458bb for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-4/master#f66e4697ae286985ddefc53c3a047614568458bb:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/reg/genetic/0.2.1:/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" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d401db291cb492dfd1e6724e91694c2d5facea8e0972bfcd61ad8bf24a3a5de5
[INFO] running `"docker" "start" "-a" "d401db291cb492dfd1e6724e91694c2d5facea8e0972bfcd61ad8bf24a3a5de5"`
[INFO] [stderr]     Checking genetic v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `universe::Universe`
[INFO] [stderr]   --> src/lib.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 | use universe::Universe;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mutation_rate`
[INFO] [stderr]   --> src/lib.rs:63:23
[INFO] [stderr]    |
[INFO] [stderr] 63 |     fn mutate(&mut self, mutation_rate: f32) {
[INFO] [stderr]    |                          ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_mutation_rate`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `population`
[INFO] [stderr]    --> src/lib.rs:131:28
[INFO] [stderr]     |
[INFO] [stderr] 131 |     fn measure_fitness(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stderr]     |                               ^^^^^^^^^^ help: consider prefixing with an underscore: `_population`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `population`
[INFO] [stderr]    --> src/lib.rs:150:22
[INFO] [stderr]     |
[INFO] [stderr] 150 |     fn reproduce(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stderr]     |                         ^^^^^^^^^^ help: consider prefixing with an underscore: `_population`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `pop_limit`
[INFO] [stderr]   --> src/universe.rs:26:2
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pop_limit: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mutation_rate`
[INFO] [stderr]   --> src/lib.rs:63:23
[INFO] [stderr]    |
[INFO] [stderr] 63 |     fn mutate(&mut self, mutation_rate: f32) {
[INFO] [stderr]    |                          ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_mutation_rate`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `population`
[INFO] [stderr]    --> src/lib.rs:131:28
[INFO] [stderr]     |
[INFO] [stderr] 131 |     fn measure_fitness(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stderr]     |                               ^^^^^^^^^^ help: consider prefixing with an underscore: `_population`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `population`
[INFO] [stderr]    --> src/lib.rs:150:22
[INFO] [stderr]     |
[INFO] [stderr] 150 |     fn reproduce(&self, population: &mut Vec<LittleAnimal>) {
[INFO] [stderr]     |                         ^^^^^^^^^^ help: consider prefixing with an underscore: `_population`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `pop_limit`
[INFO] [stderr]   --> src/universe.rs:26:2
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pop_limit: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_genome`
[INFO] [stderr]   --> src/lib.rs:38:2
[INFO] [stderr]    |
[INFO] [stderr] 38 |     pub fn from_genome(genome: &Vec<u8>) -> LittleAnimal {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `NaturalSelection`
[INFO] [stderr]    --> src/lib.rs:119:1
[INFO] [stderr]     |
[INFO] [stderr] 119 | struct NaturalSelection;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/lib.rs:123:2
[INFO] [stderr]     |
[INFO] [stderr] 123 |     pub fn new() -> NaturalSelection {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `NaturalReproduction`
[INFO] [stderr]    --> src/lib.rs:138:1
[INFO] [stderr]     |
[INFO] [stderr] 138 | struct NaturalReproduction;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/lib.rs:142:2
[INFO] [stderr]     |
[INFO] [stderr] 142 |     pub fn new() -> NaturalReproduction {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `"docker" "inspect" "d401db291cb492dfd1e6724e91694c2d5facea8e0972bfcd61ad8bf24a3a5de5"`
[INFO] running `"docker" "rm" "-f" "d401db291cb492dfd1e6724e91694c2d5facea8e0972bfcd61ad8bf24a3a5de5"`
[INFO] [stdout] d401db291cb492dfd1e6724e91694c2d5facea8e0972bfcd61ad8bf24a3a5de5