Dec 05 01:00:05.864 INFO checking NewlineCoding/lab_8 against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481 Dec 05 01:00:05.864 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-7/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-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 05 01:00:06.059 INFO [stdout] 1f3554ccae350fbea7efa14ce5fe5d9172a7496be8ffacfb791ed96cbe46f38c Dec 05 01:00:06.060 INFO running `"docker" "start" "-a" "1f3554ccae350fbea7efa14ce5fe5d9172a7496be8ffacfb791ed96cbe46f38c"` Dec 05 01:00:06.510 INFO [stderr] usermod: no changes Dec 05 01:00:06.552 INFO [stderr] Checking mersenne_twister v1.1.0 Dec 05 01:00:07.120 INFO [stderr] Checking lab_8 v0.1.0 (/source) Dec 05 01:00:07.544 INFO [stderr] warning: unused imports: `IndependentSample`, `Range` Dec 05 01:00:07.544 INFO [stderr] --> src/main.rs:6:27 Dec 05 01:00:07.544 INFO [stderr] | Dec 05 01:00:07.544 INFO [stderr] 6 | use rand::distributions::{IndependentSample, Range}; Dec 05 01:00:07.544 INFO [stderr] | ^^^^^^^^^^^^^^^^^ ^^^^^ Dec 05 01:00:07.544 INFO [stderr] | Dec 05 01:00:07.544 INFO [stderr] = note: #[warn(unused_imports)] on by default Dec 05 01:00:07.544 INFO [stderr] Dec 05 01:00:07.544 INFO [stderr] warning: unused import: `std::collections::HashSet` Dec 05 01:00:07.544 INFO [stderr] --> src/main.rs:7:5 Dec 05 01:00:07.544 INFO [stderr] | Dec 05 01:00:07.544 INFO [stderr] 7 | use std::collections::HashSet; Dec 05 01:00:07.544 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ Dec 05 01:00:07.544 INFO [stderr] Dec 05 01:00:07.544 INFO [stderr] warning: unused import: `mersenne_twister::MersenneTwister` Dec 05 01:00:07.544 INFO [stderr] --> src/main.rs:9:5 Dec 05 01:00:07.544 INFO [stderr] | Dec 05 01:00:07.544 INFO [stderr] 9 | use mersenne_twister::MersenneTwister; Dec 05 01:00:07.544 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Dec 05 01:00:07.544 INFO [stderr] Dec 05 01:00:07.544 INFO [stderr] warning: unused imports: `Rng`, `SeedableRng` Dec 05 01:00:07.544 INFO [stderr] --> src/main.rs:10:12 Dec 05 01:00:07.544 INFO [stderr] | Dec 05 01:00:07.544 INFO [stderr] 10 | use rand::{Rng, SeedableRng}; Dec 05 01:00:07.544 INFO [stderr] | ^^^ ^^^^^^^^^^^ Dec 05 01:00:07.544 INFO [stderr] Dec 05 01:00:07.544 INFO [stderr] warning: unused import: `Duration` Dec 05 01:00:07.544 INFO [stderr] --> src/main.rs:12:17 Dec 05 01:00:07.544 INFO [stderr] | Dec 05 01:00:07.544 INFO [stderr] 12 | use std::time::{Duration, Instant}; Dec 05 01:00:07.544 INFO [stderr] | ^^^^^^^^ Dec 05 01:00:07.544 INFO [stderr] Dec 05 01:00:07.599 INFO [stderr] warning: value assigned to `tests_per_core` is never read Dec 05 01:00:07.599 INFO [stderr] --> src/main.rs:85:9 Dec 05 01:00:07.599 INFO [stderr] | Dec 05 01:00:07.599 INFO [stderr] 85 | tests_per_core = n - 2 Dec 05 01:00:07.599 INFO [stderr] | ^^^^^^^^^^^^^^ Dec 05 01:00:07.599 INFO [stderr] | Dec 05 01:00:07.599 INFO [stderr] = note: #[warn(unused_assignments)] on by default Dec 05 01:00:07.599 INFO [stderr] Dec 05 01:00:07.599 INFO [stderr] warning: unused variable: `num_cpu` Dec 05 01:00:07.599 INFO [stderr] --> src/main.rs:113:9 Dec 05 01:00:07.599 INFO [stderr] | Dec 05 01:00:07.599 INFO [stderr] 113 | let num_cpu = num_cpus::get(); Dec 05 01:00:07.599 INFO [stderr] | ^^^^^^^ help: consider using `_num_cpu` instead Dec 05 01:00:07.599 INFO [stderr] | Dec 05 01:00:07.599 INFO [stderr] = note: #[warn(unused_variables)] on by default Dec 05 01:00:07.599 INFO [stderr] Dec 05 01:00:07.599 INFO [stderr] warning: value assigned to `tests_per_core` is never read Dec 05 01:00:07.599 INFO [stderr] --> src/main.rs:116:9 Dec 05 01:00:07.599 INFO [stderr] | Dec 05 01:00:07.599 INFO [stderr] 116 | tests_per_core = n - 2 Dec 05 01:00:07.599 INFO [stderr] | ^^^^^^^^^^^^^^ Dec 05 01:00:07.599 INFO [stderr] Dec 05 01:00:07.603 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.603 INFO [stderr] --> src/main.rs:17:19 Dec 05 01:00:07.603 INFO [stderr] | Dec 05 01:00:07.603 INFO [stderr] 17 | fn is_prime_naive(mut n: u64) -> bool { Dec 05 01:00:07.603 INFO [stderr] | ----^ Dec 05 01:00:07.603 INFO [stderr] | | Dec 05 01:00:07.603 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.603 INFO [stderr] | Dec 05 01:00:07.603 INFO [stderr] = note: #[warn(unused_mut)] on by default Dec 05 01:00:07.603 INFO [stderr] Dec 05 01:00:07.603 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.603 INFO [stderr] --> src/main.rs:31:28 Dec 05 01:00:07.603 INFO [stderr] | Dec 05 01:00:07.603 INFO [stderr] 31 | fn modular_exp(mut a: u64, mut b: u64, mut c: u64) -> u64 { Dec 05 01:00:07.603 INFO [stderr] | ----^ Dec 05 01:00:07.603 INFO [stderr] | | Dec 05 01:00:07.603 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.603 INFO [stderr] Dec 05 01:00:07.603 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.603 INFO [stderr] --> src/main.rs:31:40 Dec 05 01:00:07.603 INFO [stderr] | Dec 05 01:00:07.603 INFO [stderr] 31 | fn modular_exp(mut a: u64, mut b: u64, mut c: u64) -> u64 { Dec 05 01:00:07.603 INFO [stderr] | ----^ Dec 05 01:00:07.603 INFO [stderr] | | Dec 05 01:00:07.603 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.603 INFO [stderr] Dec 05 01:00:07.607 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.607 INFO [stderr] --> src/main.rs:52:14 Dec 05 01:00:07.607 INFO [stderr] | Dec 05 01:00:07.607 INFO [stderr] 52 | fn tu_finder(mut n: u64) -> (u64, u64) { Dec 05 01:00:07.607 INFO [stderr] | ----^ Dec 05 01:00:07.607 INFO [stderr] | | Dec 05 01:00:07.607 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.607 INFO [stderr] Dec 05 01:00:07.611 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.611 INFO [stderr] --> src/main.rs:79:27 Dec 05 01:00:07.611 INFO [stderr] | Dec 05 01:00:07.611 INFO [stderr] 79 | fn is_prime_mr_multi_core(mut n: u64, mut tests_per_core: u64) -> bool { Dec 05 01:00:07.611 INFO [stderr] | ----^ Dec 05 01:00:07.611 INFO [stderr] | | Dec 05 01:00:07.611 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.611 INFO [stderr] Dec 05 01:00:07.611 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.611 INFO [stderr] --> src/main.rs:82:9 Dec 05 01:00:07.611 INFO [stderr] | Dec 05 01:00:07.611 INFO [stderr] 82 | let mut workers = ThreadPool::new_with_name("worker".into(), num_cpu); Dec 05 01:00:07.611 INFO [stderr] | ----^^^^^^^ Dec 05 01:00:07.611 INFO [stderr] | | Dec 05 01:00:07.611 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.611 INFO [stderr] Dec 05 01:00:07.611 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.611 INFO [stderr] --> src/main.rs:91:9 Dec 05 01:00:07.611 INFO [stderr] | Dec 05 01:00:07.611 INFO [stderr] 91 | let mut t: u64 = tu_tuple.0; Dec 05 01:00:07.611 INFO [stderr] | ----^ Dec 05 01:00:07.611 INFO [stderr] | | Dec 05 01:00:07.611 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.611 INFO [stderr] Dec 05 01:00:07.611 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.611 INFO [stderr] --> src/main.rs:92:9 Dec 05 01:00:07.611 INFO [stderr] | Dec 05 01:00:07.611 INFO [stderr] 92 | let mut u: u64 = tu_tuple.1; Dec 05 01:00:07.611 INFO [stderr] | ----^ Dec 05 01:00:07.611 INFO [stderr] | | Dec 05 01:00:07.611 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.611 INFO [stderr] Dec 05 01:00:07.611 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.611 INFO [stderr] --> src/main.rs:112:28 Dec 05 01:00:07.611 INFO [stderr] | Dec 05 01:00:07.611 INFO [stderr] 112 | fn is_prime_mr_single_core(mut n: u64, mut tests_per_core: u64) -> bool { Dec 05 01:00:07.611 INFO [stderr] | ----^ Dec 05 01:00:07.611 INFO [stderr] | | Dec 05 01:00:07.611 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.611 INFO [stderr] Dec 05 01:00:07.611 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.611 INFO [stderr] --> src/main.rs:122:9 Dec 05 01:00:07.611 INFO [stderr] | Dec 05 01:00:07.611 INFO [stderr] 122 | let mut t: u64 = tu_tuple.0; Dec 05 01:00:07.611 INFO [stderr] | ----^ Dec 05 01:00:07.611 INFO [stderr] | | Dec 05 01:00:07.611 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.611 INFO [stderr] Dec 05 01:00:07.611 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.611 INFO [stderr] --> src/main.rs:123:9 Dec 05 01:00:07.611 INFO [stderr] | Dec 05 01:00:07.611 INFO [stderr] 123 | let mut u: u64 = tu_tuple.1; Dec 05 01:00:07.612 INFO [stderr] | ----^ Dec 05 01:00:07.612 INFO [stderr] | | Dec 05 01:00:07.612 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.612 INFO [stderr] Dec 05 01:00:07.615 INFO [stderr] warning: function is never used: `is_prime_naive` Dec 05 01:00:07.615 INFO [stderr] --> src/main.rs:17:1 Dec 05 01:00:07.615 INFO [stderr] | Dec 05 01:00:07.615 INFO [stderr] 17 | fn is_prime_naive(mut n: u64) -> bool { Dec 05 01:00:07.615 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Dec 05 01:00:07.615 INFO [stderr] | Dec 05 01:00:07.615 INFO [stderr] = note: #[warn(dead_code)] on by default Dec 05 01:00:07.615 INFO [stderr] Dec 05 01:00:07.630 INFO [stderr] warning: unused imports: `IndependentSample`, `Range` Dec 05 01:00:07.630 INFO [stderr] --> src/main.rs:6:27 Dec 05 01:00:07.630 INFO [stderr] | Dec 05 01:00:07.630 INFO [stderr] 6 | use rand::distributions::{IndependentSample, Range}; Dec 05 01:00:07.630 INFO [stderr] | ^^^^^^^^^^^^^^^^^ ^^^^^ Dec 05 01:00:07.630 INFO [stderr] | Dec 05 01:00:07.630 INFO [stderr] = note: #[warn(unused_imports)] on by default Dec 05 01:00:07.630 INFO [stderr] Dec 05 01:00:07.630 INFO [stderr] warning: unused import: `std::collections::HashSet` Dec 05 01:00:07.630 INFO [stderr] --> src/main.rs:7:5 Dec 05 01:00:07.630 INFO [stderr] | Dec 05 01:00:07.630 INFO [stderr] 7 | use std::collections::HashSet; Dec 05 01:00:07.630 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ Dec 05 01:00:07.630 INFO [stderr] Dec 05 01:00:07.630 INFO [stderr] warning: unused import: `mersenne_twister::MersenneTwister` Dec 05 01:00:07.630 INFO [stderr] --> src/main.rs:9:5 Dec 05 01:00:07.630 INFO [stderr] | Dec 05 01:00:07.630 INFO [stderr] 9 | use mersenne_twister::MersenneTwister; Dec 05 01:00:07.630 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Dec 05 01:00:07.630 INFO [stderr] Dec 05 01:00:07.630 INFO [stderr] warning: unused imports: `Rng`, `SeedableRng` Dec 05 01:00:07.630 INFO [stderr] --> src/main.rs:10:12 Dec 05 01:00:07.630 INFO [stderr] | Dec 05 01:00:07.630 INFO [stderr] 10 | use rand::{Rng, SeedableRng}; Dec 05 01:00:07.630 INFO [stderr] | ^^^ ^^^^^^^^^^^ Dec 05 01:00:07.630 INFO [stderr] Dec 05 01:00:07.630 INFO [stderr] warning: unused import: `Duration` Dec 05 01:00:07.630 INFO [stderr] --> src/main.rs:12:17 Dec 05 01:00:07.630 INFO [stderr] | Dec 05 01:00:07.630 INFO [stderr] 12 | use std::time::{Duration, Instant}; Dec 05 01:00:07.630 INFO [stderr] | ^^^^^^^^ Dec 05 01:00:07.630 INFO [stderr] Dec 05 01:00:07.689 INFO [stderr] warning: value assigned to `tests_per_core` is never read Dec 05 01:00:07.689 INFO [stderr] --> src/main.rs:85:9 Dec 05 01:00:07.689 INFO [stderr] | Dec 05 01:00:07.689 INFO [stderr] 85 | tests_per_core = n - 2 Dec 05 01:00:07.689 INFO [stderr] | ^^^^^^^^^^^^^^ Dec 05 01:00:07.689 INFO [stderr] | Dec 05 01:00:07.689 INFO [stderr] = note: #[warn(unused_assignments)] on by default Dec 05 01:00:07.689 INFO [stderr] Dec 05 01:00:07.689 INFO [stderr] warning: unused variable: `num_cpu` Dec 05 01:00:07.689 INFO [stderr] --> src/main.rs:113:9 Dec 05 01:00:07.689 INFO [stderr] | Dec 05 01:00:07.689 INFO [stderr] 113 | let num_cpu = num_cpus::get(); Dec 05 01:00:07.689 INFO [stderr] | ^^^^^^^ help: consider using `_num_cpu` instead Dec 05 01:00:07.689 INFO [stderr] | Dec 05 01:00:07.689 INFO [stderr] = note: #[warn(unused_variables)] on by default Dec 05 01:00:07.689 INFO [stderr] Dec 05 01:00:07.689 INFO [stderr] warning: value assigned to `tests_per_core` is never read Dec 05 01:00:07.689 INFO [stderr] --> src/main.rs:116:9 Dec 05 01:00:07.689 INFO [stderr] | Dec 05 01:00:07.689 INFO [stderr] 116 | tests_per_core = n - 2 Dec 05 01:00:07.689 INFO [stderr] | ^^^^^^^^^^^^^^ Dec 05 01:00:07.689 INFO [stderr] Dec 05 01:00:07.692 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.692 INFO [stderr] --> src/main.rs:17:19 Dec 05 01:00:07.692 INFO [stderr] | Dec 05 01:00:07.692 INFO [stderr] 17 | fn is_prime_naive(mut n: u64) -> bool { Dec 05 01:00:07.692 INFO [stderr] | ----^ Dec 05 01:00:07.692 INFO [stderr] | | Dec 05 01:00:07.692 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.692 INFO [stderr] | Dec 05 01:00:07.692 INFO [stderr] = note: #[warn(unused_mut)] on by default Dec 05 01:00:07.692 INFO [stderr] Dec 05 01:00:07.694 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.694 INFO [stderr] --> src/main.rs:31:28 Dec 05 01:00:07.694 INFO [stderr] | Dec 05 01:00:07.694 INFO [stderr] 31 | fn modular_exp(mut a: u64, mut b: u64, mut c: u64) -> u64 { Dec 05 01:00:07.694 INFO [stderr] | ----^ Dec 05 01:00:07.694 INFO [stderr] | | Dec 05 01:00:07.694 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.694 INFO [stderr] Dec 05 01:00:07.694 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.694 INFO [stderr] --> src/main.rs:31:40 Dec 05 01:00:07.694 INFO [stderr] | Dec 05 01:00:07.694 INFO [stderr] 31 | fn modular_exp(mut a: u64, mut b: u64, mut c: u64) -> u64 { Dec 05 01:00:07.695 INFO [stderr] | ----^ Dec 05 01:00:07.695 INFO [stderr] | | Dec 05 01:00:07.695 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.695 INFO [stderr] Dec 05 01:00:07.695 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.695 INFO [stderr] --> src/main.rs:52:14 Dec 05 01:00:07.695 INFO [stderr] | Dec 05 01:00:07.695 INFO [stderr] 52 | fn tu_finder(mut n: u64) -> (u64, u64) { Dec 05 01:00:07.695 INFO [stderr] | ----^ Dec 05 01:00:07.695 INFO [stderr] | | Dec 05 01:00:07.695 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.695 INFO [stderr] Dec 05 01:00:07.698 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.698 INFO [stderr] --> src/main.rs:79:27 Dec 05 01:00:07.698 INFO [stderr] | Dec 05 01:00:07.698 INFO [stderr] 79 | fn is_prime_mr_multi_core(mut n: u64, mut tests_per_core: u64) -> bool { Dec 05 01:00:07.698 INFO [stderr] | ----^ Dec 05 01:00:07.698 INFO [stderr] | | Dec 05 01:00:07.698 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.699 INFO [stderr] Dec 05 01:00:07.699 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.699 INFO [stderr] --> src/main.rs:82:9 Dec 05 01:00:07.699 INFO [stderr] | Dec 05 01:00:07.699 INFO [stderr] 82 | let mut workers = ThreadPool::new_with_name("worker".into(), num_cpu); Dec 05 01:00:07.699 INFO [stderr] | ----^^^^^^^ Dec 05 01:00:07.699 INFO [stderr] | | Dec 05 01:00:07.699 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.699 INFO [stderr] Dec 05 01:00:07.699 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.699 INFO [stderr] --> src/main.rs:91:9 Dec 05 01:00:07.699 INFO [stderr] | Dec 05 01:00:07.699 INFO [stderr] 91 | let mut t: u64 = tu_tuple.0; Dec 05 01:00:07.699 INFO [stderr] | ----^ Dec 05 01:00:07.699 INFO [stderr] | | Dec 05 01:00:07.699 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.699 INFO [stderr] Dec 05 01:00:07.699 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.699 INFO [stderr] --> src/main.rs:92:9 Dec 05 01:00:07.699 INFO [stderr] | Dec 05 01:00:07.699 INFO [stderr] 92 | let mut u: u64 = tu_tuple.1; Dec 05 01:00:07.699 INFO [stderr] | ----^ Dec 05 01:00:07.699 INFO [stderr] | | Dec 05 01:00:07.699 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.699 INFO [stderr] Dec 05 01:00:07.699 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.699 INFO [stderr] --> src/main.rs:112:28 Dec 05 01:00:07.700 INFO [stderr] | Dec 05 01:00:07.700 INFO [stderr] 112 | fn is_prime_mr_single_core(mut n: u64, mut tests_per_core: u64) -> bool { Dec 05 01:00:07.700 INFO [stderr] | ----^ Dec 05 01:00:07.700 INFO [stderr] | | Dec 05 01:00:07.700 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.700 INFO [stderr] Dec 05 01:00:07.700 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.700 INFO [stderr] --> src/main.rs:122:9 Dec 05 01:00:07.700 INFO [stderr] | Dec 05 01:00:07.700 INFO [stderr] 122 | let mut t: u64 = tu_tuple.0; Dec 05 01:00:07.700 INFO [stderr] | ----^ Dec 05 01:00:07.700 INFO [stderr] | | Dec 05 01:00:07.700 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.700 INFO [stderr] Dec 05 01:00:07.700 INFO [stderr] warning: variable does not need to be mutable Dec 05 01:00:07.700 INFO [stderr] --> src/main.rs:123:9 Dec 05 01:00:07.700 INFO [stderr] | Dec 05 01:00:07.700 INFO [stderr] 123 | let mut u: u64 = tu_tuple.1; Dec 05 01:00:07.700 INFO [stderr] | ----^ Dec 05 01:00:07.700 INFO [stderr] | | Dec 05 01:00:07.700 INFO [stderr] | help: remove this `mut` Dec 05 01:00:07.700 INFO [stderr] Dec 05 01:00:07.703 INFO [stderr] warning: function is never used: `is_prime_naive` Dec 05 01:00:07.703 INFO [stderr] --> src/main.rs:17:1 Dec 05 01:00:07.703 INFO [stderr] | Dec 05 01:00:07.703 INFO [stderr] 17 | fn is_prime_naive(mut n: u64) -> bool { Dec 05 01:00:07.703 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Dec 05 01:00:07.703 INFO [stderr] | Dec 05 01:00:07.703 INFO [stderr] = note: #[warn(dead_code)] on by default Dec 05 01:00:07.703 INFO [stderr] Dec 05 01:00:07.716 INFO [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.18s Dec 05 01:00:07.720 INFO [stderr] su: No module specific data is present Dec 05 01:00:08.135 INFO running `"docker" "inspect" "1f3554ccae350fbea7efa14ce5fe5d9172a7496be8ffacfb791ed96cbe46f38c"` Dec 05 01:00:08.377 INFO running `"docker" "rm" "-f" "1f3554ccae350fbea7efa14ce5fe5d9172a7496be8ffacfb791ed96cbe46f38c"` Dec 05 01:00:08.651 INFO [stdout] 1f3554ccae350fbea7efa14ce5fe5d9172a7496be8ffacfb791ed96cbe46f38c