Dec 12 01:13:58.821 INFO checking NewlineCoding/lab_8 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 01:13:58.821 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-1/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 12 01:13:58.990 INFO [stdout] 72159b6aa5b22b03c1765504b8e69865f8208957e8a56ce9d0233f79a85f6427
Dec 12 01:13:58.993 INFO running `"docker" "start" "-a" "72159b6aa5b22b03c1765504b8e69865f8208957e8a56ce9d0233f79a85f6427"`
Dec 12 01:13:59.652 INFO [stderr] usermod: no changes
Dec 12 01:13:59.682 INFO [stderr]     Checking mersenne_twister v1.1.0
Dec 12 01:14:00.308 INFO [stderr]     Checking lab_8 v0.1.0 (/source)
Dec 12 01:14:01.019 INFO [stderr] warning: unused imports: `IndependentSample`, `Range`
Dec 12 01:14:01.019 INFO [stderr]  --> src/main.rs:6:27
Dec 12 01:14:01.019 INFO [stderr]   |
Dec 12 01:14:01.019 INFO [stderr] 6 | use rand::distributions::{IndependentSample, Range};
Dec 12 01:14:01.019 INFO [stderr]   |                           ^^^^^^^^^^^^^^^^^  ^^^^^
Dec 12 01:14:01.019 INFO [stderr]   |
Dec 12 01:14:01.019 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 12 01:14:01.019 INFO [stderr] 
Dec 12 01:14:01.019 INFO [stderr] warning: unused import: `std::collections::HashSet`
Dec 12 01:14:01.019 INFO [stderr]  --> src/main.rs:7:5
Dec 12 01:14:01.019 INFO [stderr]   |
Dec 12 01:14:01.019 INFO [stderr] 7 | use std::collections::HashSet;
Dec 12 01:14:01.019 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 01:14:01.019 INFO [stderr] 
Dec 12 01:14:01.019 INFO [stderr] warning: unused import: `mersenne_twister::MersenneTwister`
Dec 12 01:14:01.019 INFO [stderr]  --> src/main.rs:9:5
Dec 12 01:14:01.019 INFO [stderr]   |
Dec 12 01:14:01.019 INFO [stderr] 9 | use mersenne_twister::MersenneTwister;
Dec 12 01:14:01.019 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 01:14:01.019 INFO [stderr] 
Dec 12 01:14:01.019 INFO [stderr] warning: unused imports: `Rng`, `SeedableRng`
Dec 12 01:14:01.019 INFO [stderr]   --> src/main.rs:10:12
Dec 12 01:14:01.019 INFO [stderr]    |
Dec 12 01:14:01.019 INFO [stderr] 10 | use rand::{Rng, SeedableRng};
Dec 12 01:14:01.019 INFO [stderr]    |            ^^^  ^^^^^^^^^^^
Dec 12 01:14:01.019 INFO [stderr] 
Dec 12 01:14:01.019 INFO [stderr] warning: unused import: `Duration`
Dec 12 01:14:01.019 INFO [stderr]   --> src/main.rs:12:17
Dec 12 01:14:01.019 INFO [stderr]    |
Dec 12 01:14:01.019 INFO [stderr] 12 | use std::time::{Duration, Instant};
Dec 12 01:14:01.019 INFO [stderr]    |                 ^^^^^^^^
Dec 12 01:14:01.019 INFO [stderr] 
Dec 12 01:14:01.109 INFO [stderr] warning: value assigned to `tests_per_core` is never read
Dec 12 01:14:01.109 INFO [stderr]   --> src/main.rs:85:9
Dec 12 01:14:01.109 INFO [stderr]    |
Dec 12 01:14:01.109 INFO [stderr] 85 |         tests_per_core = n - 2
Dec 12 01:14:01.109 INFO [stderr]    |         ^^^^^^^^^^^^^^
Dec 12 01:14:01.109 INFO [stderr]    |
Dec 12 01:14:01.109 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 12 01:14:01.109 INFO [stderr] 
Dec 12 01:14:01.110 INFO [stderr] warning: unused variable: `num_cpu`
Dec 12 01:14:01.110 INFO [stderr]    --> src/main.rs:113:9
Dec 12 01:14:01.110 INFO [stderr]     |
Dec 12 01:14:01.110 INFO [stderr] 113 |     let num_cpu = num_cpus::get();
Dec 12 01:14:01.110 INFO [stderr]     |         ^^^^^^^ help: consider using `_num_cpu` instead
Dec 12 01:14:01.110 INFO [stderr]     |
Dec 12 01:14:01.110 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 12 01:14:01.110 INFO [stderr] 
Dec 12 01:14:01.110 INFO [stderr] warning: value assigned to `tests_per_core` is never read
Dec 12 01:14:01.110 INFO [stderr]    --> src/main.rs:116:9
Dec 12 01:14:01.110 INFO [stderr]     |
Dec 12 01:14:01.110 INFO [stderr] 116 |         tests_per_core = n - 2
Dec 12 01:14:01.110 INFO [stderr]     |         ^^^^^^^^^^^^^^
Dec 12 01:14:01.110 INFO [stderr] 
Dec 12 01:14:01.116 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.116 INFO [stderr]   --> src/main.rs:17:19
Dec 12 01:14:01.116 INFO [stderr]    |
Dec 12 01:14:01.116 INFO [stderr] 17 | fn is_prime_naive(mut n: u64) -> bool {
Dec 12 01:14:01.116 INFO [stderr]    |                   ----^
Dec 12 01:14:01.116 INFO [stderr]    |                   |
Dec 12 01:14:01.116 INFO [stderr]    |                   help: remove this `mut`
Dec 12 01:14:01.116 INFO [stderr]    |
Dec 12 01:14:01.116 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 01:14:01.116 INFO [stderr] 
Dec 12 01:14:01.116 INFO [stderr] warning: unused imports: `IndependentSample`, `Range`
Dec 12 01:14:01.116 INFO [stderr]  --> src/main.rs:6:27
Dec 12 01:14:01.120 INFO [stderr]   |
Dec 12 01:14:01.120 INFO [stderr] 6 | use rand::distributions::{IndependentSample, Range};
Dec 12 01:14:01.120 INFO [stderr]   |                           ^^^^^^^^^^^^^^^^^  ^^^^^
Dec 12 01:14:01.120 INFO [stderr]   |
Dec 12 01:14:01.120 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 12 01:14:01.120 INFO [stderr] 
Dec 12 01:14:01.120 INFO [stderr] warning: unused import: `std::collections::HashSet`
Dec 12 01:14:01.120 INFO [stderr]  --> src/main.rs:7:5
Dec 12 01:14:01.120 INFO [stderr]   |
Dec 12 01:14:01.120 INFO [stderr] 7 | use std::collections::HashSet;
Dec 12 01:14:01.120 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 01:14:01.120 INFO [stderr] 
Dec 12 01:14:01.120 INFO [stderr] warning: unused import: `mersenne_twister::MersenneTwister`
Dec 12 01:14:01.120 INFO [stderr]  --> src/main.rs:9:5
Dec 12 01:14:01.120 INFO [stderr]   |
Dec 12 01:14:01.120 INFO [stderr] 9 | use mersenne_twister::MersenneTwister;
Dec 12 01:14:01.121 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 01:14:01.121 INFO [stderr] 
Dec 12 01:14:01.121 INFO [stderr] warning: unused imports: `Rng`, `SeedableRng`
Dec 12 01:14:01.121 INFO [stderr]   --> src/main.rs:10:12
Dec 12 01:14:01.121 INFO [stderr]    |
Dec 12 01:14:01.121 INFO [stderr] 10 | use rand::{Rng, SeedableRng};
Dec 12 01:14:01.121 INFO [stderr]    |            ^^^  ^^^^^^^^^^^
Dec 12 01:14:01.121 INFO [stderr] 
Dec 12 01:14:01.121 INFO [stderr] warning: unused import: `Duration`
Dec 12 01:14:01.121 INFO [stderr]   --> src/main.rs:12:17
Dec 12 01:14:01.121 INFO [stderr]    |
Dec 12 01:14:01.121 INFO [stderr] 12 | use std::time::{Duration, Instant};
Dec 12 01:14:01.121 INFO [stderr]    |                 ^^^^^^^^
Dec 12 01:14:01.121 INFO [stderr] 
Dec 12 01:14:01.121 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.121 INFO [stderr]   --> src/main.rs:31:28
Dec 12 01:14:01.121 INFO [stderr]    |
Dec 12 01:14:01.121 INFO [stderr] 31 | fn modular_exp(mut a: u64, mut b: u64, mut c: u64) -> u64 {
Dec 12 01:14:01.121 INFO [stderr]    |                            ----^
Dec 12 01:14:01.121 INFO [stderr]    |                            |
Dec 12 01:14:01.121 INFO [stderr]    |                            help: remove this `mut`
Dec 12 01:14:01.121 INFO [stderr] 
Dec 12 01:14:01.121 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.121 INFO [stderr]   --> src/main.rs:31:40
Dec 12 01:14:01.121 INFO [stderr]    |
Dec 12 01:14:01.121 INFO [stderr] 31 | fn modular_exp(mut a: u64, mut b: u64, mut c: u64) -> u64 {
Dec 12 01:14:01.121 INFO [stderr]    |                                        ----^
Dec 12 01:14:01.121 INFO [stderr]    |                                        |
Dec 12 01:14:01.121 INFO [stderr]    |                                        help: remove this `mut`
Dec 12 01:14:01.121 INFO [stderr] 
Dec 12 01:14:01.121 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.121 INFO [stderr]   --> src/main.rs:52:14
Dec 12 01:14:01.121 INFO [stderr]    |
Dec 12 01:14:01.121 INFO [stderr] 52 | fn tu_finder(mut n: u64) -> (u64, u64) {
Dec 12 01:14:01.121 INFO [stderr]    |              ----^
Dec 12 01:14:01.121 INFO [stderr]    |              |
Dec 12 01:14:01.121 INFO [stderr]    |              help: remove this `mut`
Dec 12 01:14:01.121 INFO [stderr] 
Dec 12 01:14:01.124 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.124 INFO [stderr]   --> src/main.rs:79:27
Dec 12 01:14:01.124 INFO [stderr]    |
Dec 12 01:14:01.124 INFO [stderr] 79 | fn is_prime_mr_multi_core(mut n: u64, mut tests_per_core: u64) -> bool {
Dec 12 01:14:01.124 INFO [stderr]    |                           ----^
Dec 12 01:14:01.125 INFO [stderr]    |                           |
Dec 12 01:14:01.125 INFO [stderr]    |                           help: remove this `mut`
Dec 12 01:14:01.125 INFO [stderr] 
Dec 12 01:14:01.125 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.125 INFO [stderr]   --> src/main.rs:82:9
Dec 12 01:14:01.125 INFO [stderr]    |
Dec 12 01:14:01.125 INFO [stderr] 82 |     let mut workers = ThreadPool::new_with_name("worker".into(), num_cpu);
Dec 12 01:14:01.125 INFO [stderr]    |         ----^^^^^^^
Dec 12 01:14:01.125 INFO [stderr]    |         |
Dec 12 01:14:01.125 INFO [stderr]    |         help: remove this `mut`
Dec 12 01:14:01.125 INFO [stderr] 
Dec 12 01:14:01.125 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.125 INFO [stderr]   --> src/main.rs:91:9
Dec 12 01:14:01.125 INFO [stderr]    |
Dec 12 01:14:01.125 INFO [stderr] 91 |     let mut t: u64 = tu_tuple.0;
Dec 12 01:14:01.125 INFO [stderr]    |         ----^
Dec 12 01:14:01.125 INFO [stderr]    |         |
Dec 12 01:14:01.125 INFO [stderr]    |         help: remove this `mut`
Dec 12 01:14:01.125 INFO [stderr] 
Dec 12 01:14:01.125 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.125 INFO [stderr]   --> src/main.rs:92:9
Dec 12 01:14:01.125 INFO [stderr]    |
Dec 12 01:14:01.125 INFO [stderr] 92 |     let mut u: u64 = tu_tuple.1;
Dec 12 01:14:01.125 INFO [stderr]    |         ----^
Dec 12 01:14:01.125 INFO [stderr]    |         |
Dec 12 01:14:01.125 INFO [stderr]    |         help: remove this `mut`
Dec 12 01:14:01.125 INFO [stderr] 
Dec 12 01:14:01.128 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.128 INFO [stderr]    --> src/main.rs:112:28
Dec 12 01:14:01.128 INFO [stderr]     |
Dec 12 01:14:01.128 INFO [stderr] 112 | fn is_prime_mr_single_core(mut n: u64, mut tests_per_core: u64) -> bool {
Dec 12 01:14:01.128 INFO [stderr]     |                            ----^
Dec 12 01:14:01.128 INFO [stderr]     |                            |
Dec 12 01:14:01.128 INFO [stderr]     |                            help: remove this `mut`
Dec 12 01:14:01.128 INFO [stderr] 
Dec 12 01:14:01.128 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.128 INFO [stderr]    --> src/main.rs:122:9
Dec 12 01:14:01.128 INFO [stderr]     |
Dec 12 01:14:01.128 INFO [stderr] 122 |     let mut t: u64 = tu_tuple.0;
Dec 12 01:14:01.128 INFO [stderr]     |         ----^
Dec 12 01:14:01.128 INFO [stderr]     |         |
Dec 12 01:14:01.128 INFO [stderr]     |         help: remove this `mut`
Dec 12 01:14:01.128 INFO [stderr] 
Dec 12 01:14:01.128 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.128 INFO [stderr]    --> src/main.rs:123:9
Dec 12 01:14:01.128 INFO [stderr]     |
Dec 12 01:14:01.128 INFO [stderr] 123 |     let mut u: u64 = tu_tuple.1;
Dec 12 01:14:01.128 INFO [stderr]     |         ----^
Dec 12 01:14:01.128 INFO [stderr]     |         |
Dec 12 01:14:01.128 INFO [stderr]     |         help: remove this `mut`
Dec 12 01:14:01.128 INFO [stderr] 
Dec 12 01:14:01.131 INFO [stderr] warning: function is never used: `is_prime_naive`
Dec 12 01:14:01.131 INFO [stderr]   --> src/main.rs:17:1
Dec 12 01:14:01.131 INFO [stderr]    |
Dec 12 01:14:01.131 INFO [stderr] 17 | fn is_prime_naive(mut n: u64) -> bool {
Dec 12 01:14:01.131 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 01:14:01.131 INFO [stderr]    |
Dec 12 01:14:01.131 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 01:14:01.131 INFO [stderr] 
Dec 12 01:14:01.188 INFO [stderr] warning: value assigned to `tests_per_core` is never read
Dec 12 01:14:01.188 INFO [stderr]   --> src/main.rs:85:9
Dec 12 01:14:01.188 INFO [stderr]    |
Dec 12 01:14:01.188 INFO [stderr] 85 |         tests_per_core = n - 2
Dec 12 01:14:01.188 INFO [stderr]    |         ^^^^^^^^^^^^^^
Dec 12 01:14:01.188 INFO [stderr]    |
Dec 12 01:14:01.188 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 12 01:14:01.188 INFO [stderr] 
Dec 12 01:14:01.188 INFO [stderr] warning: unused variable: `num_cpu`
Dec 12 01:14:01.189 INFO [stderr]    --> src/main.rs:113:9
Dec 12 01:14:01.189 INFO [stderr]     |
Dec 12 01:14:01.189 INFO [stderr] 113 |     let num_cpu = num_cpus::get();
Dec 12 01:14:01.189 INFO [stderr]     |         ^^^^^^^ help: consider using `_num_cpu` instead
Dec 12 01:14:01.189 INFO [stderr]     |
Dec 12 01:14:01.189 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 12 01:14:01.189 INFO [stderr] 
Dec 12 01:14:01.189 INFO [stderr] warning: value assigned to `tests_per_core` is never read
Dec 12 01:14:01.189 INFO [stderr]    --> src/main.rs:116:9
Dec 12 01:14:01.189 INFO [stderr]     |
Dec 12 01:14:01.189 INFO [stderr] 116 |         tests_per_core = n - 2
Dec 12 01:14:01.189 INFO [stderr]     |         ^^^^^^^^^^^^^^
Dec 12 01:14:01.189 INFO [stderr] 
Dec 12 01:14:01.189 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.189 INFO [stderr]   --> src/main.rs:17:19
Dec 12 01:14:01.189 INFO [stderr]    |
Dec 12 01:14:01.189 INFO [stderr] 17 | fn is_prime_naive(mut n: u64) -> bool {
Dec 12 01:14:01.189 INFO [stderr]    |                   ----^
Dec 12 01:14:01.189 INFO [stderr]    |                   |
Dec 12 01:14:01.189 INFO [stderr]    |                   help: remove this `mut`
Dec 12 01:14:01.189 INFO [stderr]    |
Dec 12 01:14:01.189 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 01:14:01.189 INFO [stderr] 
Dec 12 01:14:01.189 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.189 INFO [stderr]   --> src/main.rs:31:28
Dec 12 01:14:01.189 INFO [stderr]    |
Dec 12 01:14:01.189 INFO [stderr] 31 | fn modular_exp(mut a: u64, mut b: u64, mut c: u64) -> u64 {
Dec 12 01:14:01.189 INFO [stderr]    |                            ----^
Dec 12 01:14:01.189 INFO [stderr]    |                            |
Dec 12 01:14:01.189 INFO [stderr]    |                            help: remove this `mut`
Dec 12 01:14:01.189 INFO [stderr] 
Dec 12 01:14:01.189 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.189 INFO [stderr]   --> src/main.rs:31:40
Dec 12 01:14:01.189 INFO [stderr]    |
Dec 12 01:14:01.189 INFO [stderr] 31 | fn modular_exp(mut a: u64, mut b: u64, mut c: u64) -> u64 {
Dec 12 01:14:01.189 INFO [stderr]    |                                        ----^
Dec 12 01:14:01.189 INFO [stderr]    |                                        |
Dec 12 01:14:01.189 INFO [stderr]    |                                        help: remove this `mut`
Dec 12 01:14:01.189 INFO [stderr] 
Dec 12 01:14:01.189 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.189 INFO [stderr]   --> src/main.rs:52:14
Dec 12 01:14:01.189 INFO [stderr]    |
Dec 12 01:14:01.189 INFO [stderr] 52 | fn tu_finder(mut n: u64) -> (u64, u64) {
Dec 12 01:14:01.189 INFO [stderr]    |              ----^
Dec 12 01:14:01.189 INFO [stderr]    |              |
Dec 12 01:14:01.189 INFO [stderr]    |              help: remove this `mut`
Dec 12 01:14:01.189 INFO [stderr] 
Dec 12 01:14:01.191 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.191 INFO [stderr]   --> src/main.rs:79:27
Dec 12 01:14:01.191 INFO [stderr]    |
Dec 12 01:14:01.191 INFO [stderr] 79 | fn is_prime_mr_multi_core(mut n: u64, mut tests_per_core: u64) -> bool {
Dec 12 01:14:01.191 INFO [stderr]    |                           ----^
Dec 12 01:14:01.191 INFO [stderr]    |                           |
Dec 12 01:14:01.191 INFO [stderr]    |                           help: remove this `mut`
Dec 12 01:14:01.191 INFO [stderr] 
Dec 12 01:14:01.191 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.191 INFO [stderr]   --> src/main.rs:82:9
Dec 12 01:14:01.191 INFO [stderr]    |
Dec 12 01:14:01.191 INFO [stderr] 82 |     let mut workers = ThreadPool::new_with_name("worker".into(), num_cpu);
Dec 12 01:14:01.191 INFO [stderr]    |         ----^^^^^^^
Dec 12 01:14:01.191 INFO [stderr]    |         |
Dec 12 01:14:01.191 INFO [stderr]    |         help: remove this `mut`
Dec 12 01:14:01.191 INFO [stderr] 
Dec 12 01:14:01.191 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.191 INFO [stderr]   --> src/main.rs:91:9
Dec 12 01:14:01.191 INFO [stderr]    |
Dec 12 01:14:01.191 INFO [stderr] 91 |     let mut t: u64 = tu_tuple.0;
Dec 12 01:14:01.191 INFO [stderr]    |         ----^
Dec 12 01:14:01.191 INFO [stderr]    |         |
Dec 12 01:14:01.191 INFO [stderr]    |         help: remove this `mut`
Dec 12 01:14:01.191 INFO [stderr] 
Dec 12 01:14:01.191 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.191 INFO [stderr]   --> src/main.rs:92:9
Dec 12 01:14:01.191 INFO [stderr]    |
Dec 12 01:14:01.192 INFO [stderr] 92 |     let mut u: u64 = tu_tuple.1;
Dec 12 01:14:01.192 INFO [stderr]    |         ----^
Dec 12 01:14:01.192 INFO [stderr]    |         |
Dec 12 01:14:01.192 INFO [stderr]    |         help: remove this `mut`
Dec 12 01:14:01.192 INFO [stderr] 
Dec 12 01:14:01.192 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.192 INFO [stderr]    --> src/main.rs:112:28
Dec 12 01:14:01.192 INFO [stderr]     |
Dec 12 01:14:01.192 INFO [stderr] 112 | fn is_prime_mr_single_core(mut n: u64, mut tests_per_core: u64) -> bool {
Dec 12 01:14:01.192 INFO [stderr]     |                            ----^
Dec 12 01:14:01.192 INFO [stderr]     |                            |
Dec 12 01:14:01.192 INFO [stderr]     |                            help: remove this `mut`
Dec 12 01:14:01.192 INFO [stderr] 
Dec 12 01:14:01.192 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.192 INFO [stderr]    --> src/main.rs:122:9
Dec 12 01:14:01.192 INFO [stderr]     |
Dec 12 01:14:01.192 INFO [stderr] 122 |     let mut t: u64 = tu_tuple.0;
Dec 12 01:14:01.192 INFO [stderr]     |         ----^
Dec 12 01:14:01.192 INFO [stderr]     |         |
Dec 12 01:14:01.192 INFO [stderr]     |         help: remove this `mut`
Dec 12 01:14:01.192 INFO [stderr] 
Dec 12 01:14:01.192 INFO [stderr] warning: variable does not need to be mutable
Dec 12 01:14:01.192 INFO [stderr]    --> src/main.rs:123:9
Dec 12 01:14:01.192 INFO [stderr]     |
Dec 12 01:14:01.192 INFO [stderr] 123 |     let mut u: u64 = tu_tuple.1;
Dec 12 01:14:01.192 INFO [stderr]     |         ----^
Dec 12 01:14:01.192 INFO [stderr]     |         |
Dec 12 01:14:01.192 INFO [stderr]     |         help: remove this `mut`
Dec 12 01:14:01.192 INFO [stderr] 
Dec 12 01:14:01.197 INFO [stderr] warning: function is never used: `is_prime_naive`
Dec 12 01:14:01.197 INFO [stderr]   --> src/main.rs:17:1
Dec 12 01:14:01.197 INFO [stderr]    |
Dec 12 01:14:01.197 INFO [stderr] 17 | fn is_prime_naive(mut n: u64) -> bool {
Dec 12 01:14:01.197 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 01:14:01.197 INFO [stderr]    |
Dec 12 01:14:01.197 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 01:14:01.197 INFO [stderr] 
Dec 12 01:14:01.224 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.56s
Dec 12 01:14:01.226 INFO [stderr] su: No module specific data is present
Dec 12 01:14:01.852 INFO running `"docker" "inspect" "72159b6aa5b22b03c1765504b8e69865f8208957e8a56ce9d0233f79a85f6427"`
Dec 12 01:14:02.174 INFO running `"docker" "rm" "-f" "72159b6aa5b22b03c1765504b8e69865f8208957e8a56ce9d0233f79a85f6427"`
Dec 12 01:14:02.444 INFO [stdout] 72159b6aa5b22b03c1765504b8e69865f8208957e8a56ce9d0233f79a85f6427