[INFO] fetching crate revonet 0.2.1...
[INFO] checking revonet-0.2.1 against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] extracting crate revonet 0.2.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate revonet 0.2.1 on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate revonet 0.2.1
[INFO] finished tweaking crates.io crate revonet 0.2.1
[INFO] tweaked toml for crates.io crate revonet 0.2.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c3a1b29c7301bf72eb14c8f9e49f375878d2616c5d9430424d5818670ef5afb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0c3a1b29c7301bf72eb14c8f9e49f375878d2616c5d9430424d5818670ef5afb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c3a1b29c7301bf72eb14c8f9e49f375878d2616c5d9430424d5818670ef5afb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c3a1b29c7301bf72eb14c8f9e49f375878d2616c5d9430424d5818670ef5afb", kill_on_drop: false }`
[INFO] [stdout] 0c3a1b29c7301bf72eb14c8f9e49f375878d2616c5d9430424d5818670ef5afb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a0809595b3755a80c94e5f0891fcd7325455ca8424bd9780ba42e1b4bbd9518f
[INFO] running `Command { std: "docker" "start" "-a" "a0809595b3755a80c94e5f0891fcd7325455ca8424bd9780ba42e1b4bbd9518f", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking revonet v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ea.rs:245:69
[INFO] [stdout]     |
[INFO] [stdout] 245 | fn select_tournament(fits: &Vec<f32>, tour_size: u32, mut rng: &mut Rng) -> Vec<usize> {
[INFO] [stdout]     |                                                                     ^^^ help: use `dyn`: `dyn Rng`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ea.rs:245:69
[INFO] [stdout]     |
[INFO] [stdout] 245 | fn select_tournament(fits: &Vec<f32>, tour_size: u32, mut rng: &mut Rng) -> Vec<usize> {
[INFO] [stdout]     |                                                                     ^^^ help: use `dyn`: `dyn Rng`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ea.rs:65:45
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn init<R: Rng>(&mut self, size: usize, mut rng: &mut R) {
[INFO] [stdout]    |                                             ----^^^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ea.rs:228:97
[INFO] [stdout]     |
[INFO] [stdout] 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] [stdout]     |                                                                                                 ----^^^
[INFO] [stdout]     |                                                                                                 |
[INFO] [stdout]     |                                                                                                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ga.rs:82:182
[INFO] [stdout]    |
[INFO] [stdout] 82 | ..._type: CrossoverOperator, x_prob: f32, x_alpha: f32, mut rng: &mut R) {
[INFO] [stdout]    |                                                         ----^^^
[INFO] [stdout]    |                                                         |
[INFO] [stdout]    |                                                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ga.rs:121:102
[INFO] [stdout]     |
[INFO] [stdout] 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] [stdout]     |                                                                                                      ----^^^
[INFO] [stdout]     |                                                                                                      |
[INFO] [stdout]     |                                                                                                      help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ne.rs:67:45
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn init<R: Rng>(&mut self, size: usize, mut rng: &mut R) {
[INFO] [stdout]    |                                             ----^^^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/problem.rs:53:73
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn get_random_individual<T: Individual, R: Rng>(&self, size: usize, mut rng: &mut R) -> T {
[INFO] [stdout]    |                                                                         ----^^^
[INFO] [stdout]    |                                                                         |
[INFO] [stdout]    |                                                                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ea.rs:65:45
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn init<R: Rng>(&mut self, size: usize, mut rng: &mut R) {
[INFO] [stdout]    |                                             ----^^^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ea.rs:228:97
[INFO] [stdout]     |
[INFO] [stdout] 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] [stdout]     |                                                                                                 ----^^^
[INFO] [stdout]     |                                                                                                 |
[INFO] [stdout]     |                                                                                                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ga.rs:82:182
[INFO] [stdout]    |
[INFO] [stdout] 82 | ..._type: CrossoverOperator, x_prob: f32, x_alpha: f32, mut rng: &mut R) {
[INFO] [stdout]    |                                                         ----^^^
[INFO] [stdout]    |                                                         |
[INFO] [stdout]    |                                                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ga.rs:121:102
[INFO] [stdout]     |
[INFO] [stdout] 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] [stdout]     |                                                                                                      ----^^^
[INFO] [stdout]     |                                                                                                      |
[INFO] [stdout]     |                                                                                                      help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ne.rs:67:45
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn init<R: Rng>(&mut self, size: usize, mut rng: &mut R) {
[INFO] [stdout]    |                                             ----^^^
[INFO] [stdout]    |                                             |
[INFO] [stdout]    |                                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/problem.rs:53:73
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn get_random_individual<T: Individual, R: Rng>(&self, size: usize, mut rng: &mut R) -> T {
[INFO] [stdout]    |                                                                         ----^^^
[INFO] [stdout]    |                                                                         |
[INFO] [stdout]    |                                                                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.02s
[INFO] running `Command { std: "docker" "inspect" "a0809595b3755a80c94e5f0891fcd7325455ca8424bd9780ba42e1b4bbd9518f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0809595b3755a80c94e5f0891fcd7325455ca8424bd9780ba42e1b4bbd9518f", kill_on_drop: false }`
[INFO] [stdout] a0809595b3755a80c94e5f0891fcd7325455ca8424bd9780ba42e1b4bbd9518f