[INFO] crate revonet 0.2.1 is already in cache
[INFO] extracting crate revonet 0.2.1 into work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/reg/revonet/0.2.1
[INFO] extracting crate revonet 0.2.1 into work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/reg/revonet/0.2.1
[INFO] validating manifest of revonet-0.2.1 on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of revonet-0.2.1 on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing revonet-0.2.1
[INFO] finished frobbing revonet-0.2.1
[INFO] frobbed toml for revonet-0.2.1 written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/reg/revonet/0.2.1/Cargo.toml
[INFO] started frobbing revonet-0.2.1
[INFO] finished frobbing revonet-0.2.1
[INFO] frobbed toml for revonet-0.2.1 written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/reg/revonet/0.2.1/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking revonet-0.2.1 against try#f45cc3094ee337acd688771b9234318046b0572d for pr-60914
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60914/worker-7/try#f45cc3094ee337acd688771b9234318046b0572d:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/reg/revonet/0.2.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4dbba649b8a2d58485949f3a15b7c0c9fc2019afbd7591e94db8e2da7ee395f6
[INFO] running `"docker" "start" "-a" "4dbba649b8a2d58485949f3a15b7c0c9fc2019afbd7591e94db8e2da7ee395f6"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Checking revonet v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/ea.rs:65:45
[INFO] [stderr]    |
[INFO] [stderr] 65 |     fn init<R: Rng>(&mut self, size: usize, mut rng: &mut R) {
[INFO] [stderr]    |                                             ----^^^
[INFO] [stderr]    |                                             |
[INFO] [stderr]    |                                             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/ea.rs:228:97
[INFO] [stderr]     |
[INFO] [stderr] 228 | pub fn create_population<T: Individual, P: Problem, R: Rng+Sized>(pop_size: u32, ind_size: u32, mut rng: &mut R, problem: &P) -> Vec<T> {
[INFO] [stderr]     |                                                                                                 ----^^^
[INFO] [stderr]     |                                                                                                 |
[INFO] [stderr]     |                                                                                                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/ga.rs:82:182
[INFO] [stderr]    |
[INFO] [stderr] 82 | pub fn cross<R: Rng+Sized, T: Individual+Clone>(popul: &Vec<T>, sel_inds: &Vec<usize>, children: &mut Vec<T>, use_elite: bool, x_type: CrossoverOperator, x_prob: f32, x_alpha: f32, mut rng: &mut R) {
[INFO] [stderr]    |                                                                                                                                                                                      ----^^^
[INFO] [stderr]    |                                                                                                                                                                                      |
[INFO] [stderr]    |                                                                                                                                                                                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/ga.rs:121:102
[INFO] [stderr]     |
[INFO] [stderr] 121 | fn cross_arithmetic<T: Individual, R: Rng+Sized>(p1: &T, p2: &T, c1: &mut T, c2: &mut T, alpha: f32, mut rng: &mut R) {
[INFO] [stderr]     |                                                                                                      ----^^^
[INFO] [stderr]     |                                                                                                      |
[INFO] [stderr]     |                                                                                                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/ne.rs:67:45
[INFO] [stderr]    |
[INFO] [stderr] 67 |     fn init<R: Rng>(&mut self, size: usize, mut rng: &mut R) {
[INFO] [stderr]    |                                             ----^^^
[INFO] [stderr]    |                                             |
[INFO] [stderr]    |                                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/problem.rs:53:73
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn get_random_individual<T: Individual, R: Rng>(&self, size: usize, mut rng: &mut R) -> T {
[INFO] [stderr]    |                                                                         ----^^^
[INFO] [stderr]    |                                                                         |
[INFO] [stderr]    |                                                                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/ea.rs:65:45
[INFO] [stderr]    |
[INFO] [stderr] 65 |     fn init<R: Rng>(&mut self, size: usize, mut rng: &mut R) {
[INFO] [stderr]    |                                             ----^^^
[INFO] [stderr]    |                                             |
[INFO] [stderr]    |                                             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/ea.rs:228:97
[INFO] [stderr]     |
[INFO] [stderr] 228 | pub fn create_population<T: Individual, P: Problem, R: Rng+Sized>(pop_size: u32, ind_size: u32, mut rng: &mut R, problem: &P) -> Vec<T> {
[INFO] [stderr]     |                                                                                                 ----^^^
[INFO] [stderr]     |                                                                                                 |
[INFO] [stderr]     |                                                                                                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/ga.rs:82:182
[INFO] [stderr]    |
[INFO] [stderr] 82 | pub fn cross<R: Rng+Sized, T: Individual+Clone>(popul: &Vec<T>, sel_inds: &Vec<usize>, children: &mut Vec<T>, use_elite: bool, x_type: CrossoverOperator, x_prob: f32, x_alpha: f32, mut rng: &mut R) {
[INFO] [stderr]    |                                                                                                                                                                                      ----^^^
[INFO] [stderr]    |                                                                                                                                                                                      |
[INFO] [stderr]    |                                                                                                                                                                                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/ga.rs:121:102
[INFO] [stderr]     |
[INFO] [stderr] 121 | fn cross_arithmetic<T: Individual, R: Rng+Sized>(p1: &T, p2: &T, c1: &mut T, c2: &mut T, alpha: f32, mut rng: &mut R) {
[INFO] [stderr]     |                                                                                                      ----^^^
[INFO] [stderr]     |                                                                                                      |
[INFO] [stderr]     |                                                                                                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/ne.rs:67:45
[INFO] [stderr]    |
[INFO] [stderr] 67 |     fn init<R: Rng>(&mut self, size: usize, mut rng: &mut R) {
[INFO] [stderr]    |                                             ----^^^
[INFO] [stderr]    |                                             |
[INFO] [stderr]    |                                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/problem.rs:53:73
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn get_random_individual<T: Individual, R: Rng>(&self, size: usize, mut rng: &mut R) -> T {
[INFO] [stderr]    |                                                                         ----^^^
[INFO] [stderr]    |                                                                         |
[INFO] [stderr]    |                                                                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.86s
[INFO] running `"docker" "inspect" "4dbba649b8a2d58485949f3a15b7c0c9fc2019afbd7591e94db8e2da7ee395f6"`
[INFO] running `"docker" "rm" "-f" "4dbba649b8a2d58485949f3a15b7c0c9fc2019afbd7591e94db8e2da7ee395f6"`
[INFO] [stdout] 4dbba649b8a2d58485949f3a15b7c0c9fc2019afbd7591e94db8e2da7ee395f6