[INFO] updating cached repository https://github.com/jdickinsp/projecteuler
[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] 855d812e7609426b9c6154b60dbe789d3343795f
[INFO] checking jdickinsp/projecteuler against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjdickinsp%2Fprojecteuler" "/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/jdickinsp/projecteuler on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jdickinsp/projecteuler
[INFO] finished tweaking git repo https://github.com/jdickinsp/projecteuler
[INFO] tweaked toml for git repo https://github.com/jdickinsp/projecteuler written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/jdickinsp/projecteuler already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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=forbid" "-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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 83f9b24f5f4e620b5dff1edf152697dfc4821ed4e11af31fc5ca50c4adb52343
[INFO] running `"docker" "start" "-a" "83f9b24f5f4e620b5dff1edf152697dfc4821ed4e11af31fc5ca50c4adb52343"`
[INFO] [stderr]     Checking projecteuler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:275:13
[INFO] [stderr]     |
[INFO] [stderr] 275 |         let f = collatz_rec(i, &mut cache);
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:464:17
[INFO] [stderr]     |
[INFO] [stderr] 464 |         for (j, item) in row.iter().enumerate() {
[INFO] [stderr]     |                 ^^^^ help: consider prefixing with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/euler/bigint.rs:58:17
[INFO] [stderr]    |
[INFO] [stderr] 58 |             for k in 0..j {
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:275:13
[INFO] [stderr]     |
[INFO] [stderr] 275 |         let f = collatz_rec(i, &mut cache);
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:464:17
[INFO] [stderr]     |
[INFO] [stderr] 464 |         for (j, item) in row.iter().enumerate() {
[INFO] [stderr]     |                 ^^^^ help: consider prefixing with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/euler/bigint.rs:58:17
[INFO] [stderr]    |
[INFO] [stderr] 58 |             for k in 0..j {
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/euler/problems_11_20.rs:260:9
[INFO] [stderr]     |
[INFO] [stderr] 260 |     let mut result;
[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/euler/problems_11_20.rs:260:9
[INFO] [stderr]     |
[INFO] [stderr] 260 |     let mut result;
[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: function is never used: `fib_rec`
[INFO] [stderr]   --> src/euler/problems_11_20.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn fib_rec(i: i64, cache: &mut HashMap<i64, i128>) -> i128 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_13`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:128:1
[INFO] [stderr]     |
[INFO] [stderr] 128 | pub fn problem_13() -> i64 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `collatz_rec`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:254:1
[INFO] [stderr]     |
[INFO] [stderr] 254 | pub fn collatz_rec(i: i64, cache: &mut HashMap<i64, i128>) -> i128 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_14`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:271:1
[INFO] [stderr]     |
[INFO] [stderr] 271 | pub fn problem_14() -> i64 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `AdjList`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:289:1
[INFO] [stderr]     |
[INFO] [stderr] 289 | type AdjList = HashMap<i128, Vec<i128>>;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_graph_p15`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:309:1
[INFO] [stderr]     |
[INFO] [stderr] 309 | pub fn create_graph_p15(n: i128) -> AdjList {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse_edges`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:328:1
[INFO] [stderr]     |
[INFO] [stderr] 328 | pub fn reverse_edges(edges: &mut AdjList) -> AdjList {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `count_paths`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:338:1
[INFO] [stderr]     |
[INFO] [stderr] 338 | pub fn count_paths(edges: &AdjList, n: i128) -> i128 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_15`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:354:1
[INFO] [stderr]     |
[INFO] [stderr] 354 | pub fn problem_15() -> i128 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_16`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:364:1
[INFO] [stderr]     |
[INFO] [stderr] 364 | pub fn problem_16() -> i128 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_17`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:386:1
[INFO] [stderr]     |
[INFO] [stderr] 386 | pub fn problem_17() -> i128 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fib_rec`
[INFO] [stderr]   --> src/euler/problems_11_20.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn fib_rec(i: i64, cache: &mut HashMap<i64, i128>) -> i128 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_13`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:128:1
[INFO] [stderr]     |
[INFO] [stderr] 128 | pub fn problem_13() -> i64 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `collatz_rec`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:254:1
[INFO] [stderr]     |
[INFO] [stderr] 254 | pub fn collatz_rec(i: i64, cache: &mut HashMap<i64, i128>) -> i128 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_14`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:271:1
[INFO] [stderr]     |
[INFO] [stderr] 271 | pub fn problem_14() -> i64 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `AdjList`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:289:1
[INFO] [stderr]     |
[INFO] [stderr] 289 | type AdjList = HashMap<i128, Vec<i128>>;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_graph_p15`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:309:1
[INFO] [stderr]     |
[INFO] [stderr] 309 | pub fn create_graph_p15(n: i128) -> AdjList {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse_edges`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:328:1
[INFO] [stderr]     |
[INFO] [stderr] 328 | pub fn reverse_edges(edges: &mut AdjList) -> AdjList {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `count_paths`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:338:1
[INFO] [stderr]     |
[INFO] [stderr] 338 | pub fn count_paths(edges: &AdjList, n: i128) -> i128 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_15`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:354:1
[INFO] [stderr]     |
[INFO] [stderr] 354 | pub fn problem_15() -> i128 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_16`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:364:1
[INFO] [stderr]     |
[INFO] [stderr] 364 | pub fn problem_16() -> i128 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_17`
[INFO] [stderr]    --> src/euler/problems_11_20.rs:386:1
[INFO] [stderr]     |
[INFO] [stderr] 386 | pub fn problem_17() -> i128 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `CHUNK_SIZE`
[INFO] [stderr]  --> src/euler/bigint.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | const CHUNK_SIZE: usize = 8;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `split_chunks`
[INFO] [stderr]   --> src/euler/bigint.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn split_chunks(val: &str) -> Vec<i64> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `BigInt`
[INFO] [stderr]   --> src/euler/bigint.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub struct BigInt {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/euler/bigint.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn new(val: &str) -> BigInt {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/euler/bigint.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn add(&self, b: &BigInt) -> BigInt {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `multiply`
[INFO] [stderr]   --> src/euler/bigint.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |     fn multiply(&self, b: &BigInt) -> BigInt {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `value`
[INFO] [stderr]   --> src/euler/bigint.rs:79:5
[INFO] [stderr]    |
[INFO] [stderr] 79 |     pub fn value(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `big_exponential`
[INFO] [stderr]   --> src/euler/bigint.rs:90:1
[INFO] [stderr]    |
[INFO] [stderr] 90 | pub fn big_exponential(a: i64, x: i64) -> BigInt {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `"docker" "inspect" "83f9b24f5f4e620b5dff1edf152697dfc4821ed4e11af31fc5ca50c4adb52343"`
[INFO] running `"docker" "rm" "-f" "83f9b24f5f4e620b5dff1edf152697dfc4821ed4e11af31fc5ca50c4adb52343"`
[INFO] [stdout] 83f9b24f5f4e620b5dff1edf152697dfc4821ed4e11af31fc5ca50c4adb52343