[INFO] fetching crate num-primes 0.3.0...
[INFO] building num-primes-0.3.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate num-primes 0.3.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate num-primes 0.3.0
[INFO] finished tweaking crates.io crate num-primes 0.3.0
[INFO] tweaked toml for crates.io crate num-primes 0.3.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate num-primes 0.3.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate num-primes 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f9e30147db58e3208f469c620c46865b481646bc7c7c3f0fe383ef512bd4889f
[INFO] running `Command { std: "docker" "start" "-a" "f9e30147db58e3208f469c620c46865b481646bc7c7c3f0fe383ef512bd4889f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f9e30147db58e3208f469c620c46865b481646bc7c7c3f0fe383ef512bd4889f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9e30147db58e3208f469c620c46865b481646bc7c7c3f0fe383ef512bd4889f", kill_on_drop: false }`
[INFO] [stdout] f9e30147db58e3208f469c620c46865b481646bc7c7c3f0fe383ef512bd4889f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b127d3ee19a9db0038affe6719926693c907e36cb131c75a4633c78c088d3403
[INFO] running `Command { std: "docker" "start" "-a" "b127d3ee19a9db0038affe6719926693c907e36cb131c75a4633c78c088d3403", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling libc v0.2.102
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling num v0.4.0
[INFO] [stderr]    Compiling num-primes v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `log::debug`
[INFO] [stdout]   --> src/lib.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use log::debug;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::error`
[INFO] [stdout]   --> src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use log::error;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::info`
[INFO] [stdout]   --> src/lib.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use log::info;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/lib.rs:453:5
[INFO] [stdout]     |
[INFO] [stdout] 448 |         return false
[INFO] [stdout]     |         ------------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 453 |     return true
[INFO] [stdout]     |     ^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]    --> src/lib.rs:514:13
[INFO] [stdout]     |
[INFO] [stdout] 514 |     let mut rng = rand::thread_rng();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/lib.rs:522:9
[INFO] [stdout]     |
[INFO] [stdout] 522 |     let x = &two;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/lib.rs:523:13
[INFO] [stdout]     |
[INFO] [stdout] 523 |     let mut y = &zero;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:525:13
[INFO] [stdout]     |
[INFO] [stdout] 525 |     let mut i: usize = 0usize;
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 525 |     let mut _i: usize = 0usize;
[INFO] [stdout]     |             +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `MILLER_RABIN_ROUNDS`
[INFO] [stdout]     |
[INFO] [stdout] 525 -     let mut i: usize = 0usize;
[INFO] [stdout] 525 +     let mut MILLER_RABIN_ROUNDS: usize = 0usize;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `counter`
[INFO] [stdout]    --> src/lib.rs:526:13
[INFO] [stdout]     |
[INFO] [stdout] 526 |     let mut counter: usize = 10usize;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 526 |     let mut _counter: usize = 10usize;
[INFO] [stdout]     |             +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `MILLER_RABIN_ROUNDS`
[INFO] [stdout]     |
[INFO] [stdout] 526 -     let mut counter: usize = 10usize;
[INFO] [stdout] 526 +     let mut MILLER_RABIN_ROUNDS: usize = 10usize;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/lib.rs:512:20
[INFO] [stdout]     |
[INFO] [stdout] 512 | fn pollard_rho(mut n: BigUint) {
[INFO] [stdout]     |                    ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `one_usize`
[INFO] [stdout]    --> src/lib.rs:370:17
[INFO] [stdout]     |
[INFO] [stdout] 370 |             let one_usize = one.to_usize().unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 370 |             let _one_usize = one.to_usize().unwrap();
[INFO] [stdout]     |                 +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `MILLER_RABIN_ROUNDS`
[INFO] [stdout]     |
[INFO] [stdout] 370 -             let one_usize = one.to_usize().unwrap();
[INFO] [stdout] 370 +             let MILLER_RABIN_ROUNDS = one.to_usize().unwrap();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]    --> src/lib.rs:274:13
[INFO] [stdout]     |
[INFO] [stdout] 274 |             i = i + 2usize;
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:512:16
[INFO] [stdout]     |
[INFO] [stdout] 512 | fn pollard_rho(mut n: BigUint) {
[INFO] [stdout]     |                ----^
[INFO] [stdout]     |                |
[INFO] [stdout]     |                help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:514:9
[INFO] [stdout]     |
[INFO] [stdout] 514 |     let mut rng = rand::thread_rng();
[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/lib.rs:523:9
[INFO] [stdout]     |
[INFO] [stdout] 523 |     let mut y = &zero;
[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/lib.rs:525:9
[INFO] [stdout]     |
[INFO] [stdout] 525 |     let mut i: usize = 0usize;
[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/lib.rs:526:9
[INFO] [stdout]     |
[INFO] [stdout] 526 |     let mut counter: usize = 10usize;
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_safe_prime_add` is never used
[INFO] [stdout]    --> src/lib.rs:458:4
[INFO] [stdout]     |
[INFO] [stdout] 458 | fn is_safe_prime_add(number: &BigUint) -> bool {    
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pollard_rho` is never used
[INFO] [stdout]    --> src/lib.rs:512:4
[INFO] [stdout]     |
[INFO] [stdout] 512 | fn pollard_rho(mut n: BigUint) {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.61s
[INFO] running `Command { std: "docker" "inspect" "b127d3ee19a9db0038affe6719926693c907e36cb131c75a4633c78c088d3403", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b127d3ee19a9db0038affe6719926693c907e36cb131c75a4633c78c088d3403", kill_on_drop: false }`
[INFO] [stdout] b127d3ee19a9db0038affe6719926693c907e36cb131c75a4633c78c088d3403
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 013fbace727c0ffbb19d84ff47dd1234bd39f39bf7ab17af0a5f9c5df61aa431
[INFO] running `Command { std: "docker" "start" "-a" "013fbace727c0ffbb19d84ff47dd1234bd39f39bf7ab17af0a5f9c5df61aa431", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `log::debug`
[INFO] [stdout]   --> src/lib.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use log::debug;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::error`
[INFO] [stdout]   --> src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use log::error;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::info`
[INFO] [stdout]   --> src/lib.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use log::info;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/lib.rs:453:5
[INFO] [stdout]     |
[INFO] [stdout] 448 |         return false
[INFO] [stdout]     |         ------------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 453 |     return true
[INFO] [stdout]     |     ^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]    --> src/lib.rs:514:13
[INFO] [stdout]     |
[INFO] [stdout] 514 |     let mut rng = rand::thread_rng();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/lib.rs:522:9
[INFO] [stdout]     |
[INFO] [stdout] 522 |     let x = &two;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/lib.rs:523:13
[INFO] [stdout]     |
[INFO] [stdout] 523 |     let mut y = &zero;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:525:13
[INFO] [stdout]     |
[INFO] [stdout] 525 |     let mut i: usize = 0usize;
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 525 |     let mut _i: usize = 0usize;
[INFO] [stdout]     |             +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `MILLER_RABIN_ROUNDS`
[INFO] [stdout]     |
[INFO] [stdout] 525 -     let mut i: usize = 0usize;
[INFO] [stdout] 525 +     let mut MILLER_RABIN_ROUNDS: usize = 0usize;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `counter`
[INFO] [stdout]    --> src/lib.rs:526:13
[INFO] [stdout]     |
[INFO] [stdout] 526 |     let mut counter: usize = 10usize;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 526 |     let mut _counter: usize = 10usize;
[INFO] [stdout]     |             +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `MILLER_RABIN_ROUNDS`
[INFO] [stdout]     |
[INFO] [stdout] 526 -     let mut counter: usize = 10usize;
[INFO] [stdout] 526 +     let mut MILLER_RABIN_ROUNDS: usize = 10usize;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/lib.rs:512:20
[INFO] [stdout]     |
[INFO] [stdout] 512 | fn pollard_rho(mut n: BigUint) {
[INFO] [stdout]     |                    ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `one_usize`
[INFO] [stdout]    --> src/lib.rs:370:17
[INFO] [stdout]     |
[INFO] [stdout] 370 |             let one_usize = one.to_usize().unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 370 |             let _one_usize = one.to_usize().unwrap();
[INFO] [stdout]     |                 +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `MILLER_RABIN_ROUNDS`
[INFO] [stdout]     |
[INFO] [stdout] 370 -             let one_usize = one.to_usize().unwrap();
[INFO] [stdout] 370 +             let MILLER_RABIN_ROUNDS = one.to_usize().unwrap();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]    --> src/lib.rs:274:13
[INFO] [stdout]     |
[INFO] [stdout] 274 |             i = i + 2usize;
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:512:16
[INFO] [stdout]     |
[INFO] [stdout] 512 | fn pollard_rho(mut n: BigUint) {
[INFO] [stdout]     |                ----^
[INFO] [stdout]     |                |
[INFO] [stdout]     |                help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:514:9
[INFO] [stdout]     |
[INFO] [stdout] 514 |     let mut rng = rand::thread_rng();
[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/lib.rs:523:9
[INFO] [stdout]     |
[INFO] [stdout] 523 |     let mut y = &zero;
[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/lib.rs:525:9
[INFO] [stdout]     |
[INFO] [stdout] 525 |     let mut i: usize = 0usize;
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling num-primes v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:526:9
[INFO] [stdout]     |
[INFO] [stdout] 526 |     let mut counter: usize = 10usize;
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_safe_prime_add` is never used
[INFO] [stdout]    --> src/lib.rs:458:4
[INFO] [stdout]     |
[INFO] [stdout] 458 | fn is_safe_prime_add(number: &BigUint) -> bool {    
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pollard_rho` is never used
[INFO] [stdout]    --> src/lib.rs:512:4
[INFO] [stdout]     |
[INFO] [stdout] 512 | fn pollard_rho(mut n: BigUint) {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::debug`
[INFO] [stdout]   --> src/lib.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use log::debug;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::error`
[INFO] [stdout]   --> src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use log::error;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log::info`
[INFO] [stdout]   --> src/lib.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use log::info;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `num_bigint::BigUint`
[INFO] [stdout]  --> tests/issue1_part2.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use num_bigint::BigUint;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `num::*`
[INFO] [stdout]  --> tests/issue1_part2.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use num::*;
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/lib.rs:453:5
[INFO] [stdout]     |
[INFO] [stdout] 448 |         return false
[INFO] [stdout]     |         ------------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 453 |     return true
[INFO] [stdout]     |     ^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]    --> src/lib.rs:274:13
[INFO] [stdout]     |
[INFO] [stdout] 274 |             i = i + 2usize;
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `one_usize`
[INFO] [stdout]    --> src/lib.rs:370:17
[INFO] [stdout]     |
[INFO] [stdout] 370 |             let one_usize = one.to_usize().unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 370 |             let _one_usize = one.to_usize().unwrap();
[INFO] [stdout]     |                 +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `MILLER_RABIN_ROUNDS`
[INFO] [stdout]     |
[INFO] [stdout] 370 -             let one_usize = one.to_usize().unwrap();
[INFO] [stdout] 370 +             let MILLER_RABIN_ROUNDS = one.to_usize().unwrap();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]    --> src/lib.rs:514:13
[INFO] [stdout]     |
[INFO] [stdout] 514 |     let mut rng = rand::thread_rng();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/lib.rs:522:9
[INFO] [stdout]     |
[INFO] [stdout] 522 |     let x = &two;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/lib.rs:523:13
[INFO] [stdout]     |
[INFO] [stdout] 523 |     let mut y = &zero;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:525:13
[INFO] [stdout]     |
[INFO] [stdout] 525 |     let mut i: usize = 0usize;
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 525 |     let mut _i: usize = 0usize;
[INFO] [stdout]     |             +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `MILLER_RABIN_ROUNDS`
[INFO] [stdout]     |
[INFO] [stdout] 525 -     let mut i: usize = 0usize;
[INFO] [stdout] 525 +     let mut MILLER_RABIN_ROUNDS: usize = 0usize;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `counter`
[INFO] [stdout]    --> src/lib.rs:526:13
[INFO] [stdout]     |
[INFO] [stdout] 526 |     let mut counter: usize = 10usize;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 526 |     let mut _counter: usize = 10usize;
[INFO] [stdout]     |             +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `MILLER_RABIN_ROUNDS`
[INFO] [stdout]     |
[INFO] [stdout] 526 -     let mut counter: usize = 10usize;
[INFO] [stdout] 526 +     let mut MILLER_RABIN_ROUNDS: usize = 10usize;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/lib.rs:512:20
[INFO] [stdout]     |
[INFO] [stdout] 512 | fn pollard_rho(mut n: BigUint) {
[INFO] [stdout]     |                    ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:512:16
[INFO] [stdout]     |
[INFO] [stdout] 512 | fn pollard_rho(mut n: BigUint) {
[INFO] [stdout]     |                ----^
[INFO] [stdout]     |                |
[INFO] [stdout]     |                help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:514:9
[INFO] [stdout]     |
[INFO] [stdout] 514 |     let mut rng = rand::thread_rng();
[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/lib.rs:523:9
[INFO] [stdout]     |
[INFO] [stdout] 523 |     let mut y = &zero;
[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/lib.rs:525:9
[INFO] [stdout]     |
[INFO] [stdout] 525 |     let mut i: usize = 0usize;
[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/lib.rs:526:9
[INFO] [stdout]     |
[INFO] [stdout] 526 |     let mut counter: usize = 10usize;
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_safe_prime_add` is never used
[INFO] [stdout]    --> src/lib.rs:458:4
[INFO] [stdout]     |
[INFO] [stdout] 458 | fn is_safe_prime_add(number: &BigUint) -> bool {    
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pollard_rho` is never used
[INFO] [stdout]    --> src/lib.rs:512:4
[INFO] [stdout]     |
[INFO] [stdout] 512 | fn pollard_rho(mut n: BigUint) {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `num_bigint::BigUint`
[INFO] [stdout]  --> tests/issue1.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use num_bigint::BigUint;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `num::*`
[INFO] [stdout]  --> tests/issue1.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use num::*;
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BigInt`, `ToBigInt`, and `ToBigUint`
[INFO] [stdout]  --> tests/issue2.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | use num_bigint::{BigInt, BigUint, ToBigInt, ToBigUint};
[INFO] [stdout]   |                  ^^^^^^           ^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> tests/issue2.rs:11:17
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn gets_biguint(x: &BigUint) {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `Command { std: "docker" "inspect" "013fbace727c0ffbb19d84ff47dd1234bd39f39bf7ab17af0a5f9c5df61aa431", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "013fbace727c0ffbb19d84ff47dd1234bd39f39bf7ab17af0a5f9c5df61aa431", kill_on_drop: false }`
[INFO] [stdout] 013fbace727c0ffbb19d84ff47dd1234bd39f39bf7ab17af0a5f9c5df61aa431