[INFO] updating cached repository https://github.com/fgaray/project-euler-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d61b820d5bdb1b22269fa9c173c836d3cca64bc5
[INFO] testing fgaray/project-euler-rust against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffgaray%2Fproject-euler-rust" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fgaray/project-euler-rust on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/fgaray/project-euler-rust
[INFO] finished tweaking git repo https://github.com/fgaray/project-euler-rust
[INFO] tweaked toml for git repo https://github.com/fgaray/project-euler-rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/fgaray/project-euler-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stdout] 2f078e2aef143a7eba3a868130720f382a1f1d2c7796b4381f8bf1f67cf1d188
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "2f078e2aef143a7eba3a868130720f382a1f1d2c7796b4381f8bf1f67cf1d188"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling euler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std`
[INFO] [stderr]  --> src/problem3/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std;
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]  --> src/problem9/mod.rs:6:14
[INFO] [stderr]   |
[INFO] [stderr] 6 |     for b in (1..1000) {
[INFO] [stderr]   |              ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]  --> src/problem9/mod.rs:7:18
[INFO] [stderr]   |
[INFO] [stderr] 7 |         for c in (1..1000) {
[INFO] [stderr]   |                  ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std`
[INFO] [stderr]  --> src/problem10/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std;
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d1`
[INFO] [stderr]  --> src/problem4/mod.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut d1 = 1;
[INFO] [stderr]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_d1`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d2`
[INFO] [stderr]  --> src/problem4/mod.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut d2 = 1;
[INFO] [stderr]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_d2`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/problem3/mod.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 |    let mut v = prime.get_mem();
[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/problem4/mod.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut d1 = 1;
[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/problem4/mod.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut d2 = 1;
[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/utils/prime.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut v = Vec::new();
[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/utils/prime.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut v = Vec::with_capacity(capacity);
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem3/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem4/mod.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn solve() -> i32 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem5/mod.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem6/mod.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn solve(upper: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem7/mod.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem9/mod.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn solve(constant: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_mem`
[INFO] [stderr]   --> src/utils/prime.rs:54:12
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn get_mem(&mut self) -> &Vec<i64> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]   --> src/utils/number.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn reverse(n: i32) -> i32 {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 19 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `"docker" "inspect" "2f078e2aef143a7eba3a868130720f382a1f1d2c7796b4381f8bf1f67cf1d188"`
[INFO] running `"docker" "rm" "-f" "2f078e2aef143a7eba3a868130720f382a1f1d2c7796b4381f8bf1f67cf1d188"`
[INFO] [stdout] 2f078e2aef143a7eba3a868130720f382a1f1d2c7796b4381f8bf1f67cf1d188
[INFO] running `"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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5475aabb9257188b6532b2e69b4c42d8216ab48bbb669cdbb01bf14ed4bcc1a1
[INFO] running `"docker" "start" "-a" "5475aabb9257188b6532b2e69b4c42d8216ab48bbb669cdbb01bf14ed4bcc1a1"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling euler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std`
[INFO] [stderr]  --> src/problem3/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std;
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]  --> src/problem9/mod.rs:6:14
[INFO] [stderr]   |
[INFO] [stderr] 6 |     for b in (1..1000) {
[INFO] [stderr]   |              ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]  --> src/problem9/mod.rs:7:18
[INFO] [stderr]   |
[INFO] [stderr] 7 |         for c in (1..1000) {
[INFO] [stderr]   |                  ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std`
[INFO] [stderr]  --> src/problem10/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std;
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d1`
[INFO] [stderr]  --> src/problem4/mod.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut d1 = 1;
[INFO] [stderr]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_d1`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d2`
[INFO] [stderr]  --> src/problem4/mod.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut d2 = 1;
[INFO] [stderr]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_d2`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/problem3/mod.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 |    let mut v = prime.get_mem();
[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/problem4/mod.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut d1 = 1;
[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/problem4/mod.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut d2 = 1;
[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/utils/prime.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut v = Vec::new();
[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/utils/prime.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut v = Vec::with_capacity(capacity);
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem3/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem4/mod.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn solve() -> i32 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem5/mod.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem6/mod.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn solve(upper: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem7/mod.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem9/mod.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn solve(constant: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_mem`
[INFO] [stderr]   --> src/utils/prime.rs:54:12
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn get_mem(&mut self) -> &Vec<i64> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]   --> src/utils/number.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn reverse(n: i32) -> i32 {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 19 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `"docker" "inspect" "5475aabb9257188b6532b2e69b4c42d8216ab48bbb669cdbb01bf14ed4bcc1a1"`
[INFO] running `"docker" "rm" "-f" "5475aabb9257188b6532b2e69b4c42d8216ab48bbb669cdbb01bf14ed4bcc1a1"`
[INFO] [stdout] 5475aabb9257188b6532b2e69b4c42d8216ab48bbb669cdbb01bf14ed4bcc1a1
[INFO] running `"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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] be7d14c3763fdd2b5872ec6d1e207a0163acb54d2bddf099a73dd3831ada3697
[INFO] running `"docker" "start" "-a" "be7d14c3763fdd2b5872ec6d1e207a0163acb54d2bddf099a73dd3831ada3697"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused import: `std`
[INFO] [stderr]  --> src/problem3/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std;
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]  --> src/problem9/mod.rs:6:14
[INFO] [stderr]   |
[INFO] [stderr] 6 |     for b in (1..1000) {
[INFO] [stderr]   |              ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]  --> src/problem9/mod.rs:7:18
[INFO] [stderr]   |
[INFO] [stderr] 7 |         for c in (1..1000) {
[INFO] [stderr]   |                  ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std`
[INFO] [stderr]  --> src/problem10/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std;
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d1`
[INFO] [stderr]  --> src/problem4/mod.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut d1 = 1;
[INFO] [stderr]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_d1`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d2`
[INFO] [stderr]  --> src/problem4/mod.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut d2 = 1;
[INFO] [stderr]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_d2`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/problem3/mod.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 |    let mut v = prime.get_mem();
[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/problem4/mod.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut d1 = 1;
[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/problem4/mod.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut d2 = 1;
[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/utils/prime.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut v = Vec::new();
[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/utils/prime.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut v = Vec::with_capacity(capacity);
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem3/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem4/mod.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn solve() -> i32 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem5/mod.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem6/mod.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn solve(upper: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem7/mod.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem9/mod.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn solve(constant: i64) -> i64 {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_mem`
[INFO] [stderr]   --> src/utils/prime.rs:54:12
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn get_mem(&mut self) -> &Vec<i64> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]   --> src/utils/number.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn reverse(n: i32) -> i32 {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 19 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/euler-36e8ed5e11408bbf
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "be7d14c3763fdd2b5872ec6d1e207a0163acb54d2bddf099a73dd3831ada3697"`
[INFO] running `"docker" "rm" "-f" "be7d14c3763fdd2b5872ec6d1e207a0163acb54d2bddf099a73dd3831ada3697"`
[INFO] [stdout] be7d14c3763fdd2b5872ec6d1e207a0163acb54d2bddf099a73dd3831ada3697