[INFO] updating cached repository 414owen/Euler-In-Rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/414owen/Euler-In-Rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/414owen/Euler-In-Rust" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/414owen/Euler-In-Rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/414owen/Euler-In-Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/414owen/Euler-In-Rust" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/414owen/Euler-In-Rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/414owen/Euler-In-Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 199d5e3e75c84ff5135afad88aa792abf41c2abf
[INFO] sha for GitHub repo 414owen/Euler-In-Rust: 199d5e3e75c84ff5135afad88aa792abf41c2abf
[INFO] validating manifest of 414owen/Euler-In-Rust on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of 414owen/Euler-In-Rust on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing 414owen/Euler-In-Rust
[INFO] finished frobbing 414owen/Euler-In-Rust
[INFO] frobbed toml for 414owen/Euler-In-Rust written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/414owen/Euler-In-Rust/Cargo.toml
[INFO] started frobbing 414owen/Euler-In-Rust
[INFO] finished frobbing 414owen/Euler-In-Rust
[INFO] frobbed toml for 414owen/Euler-In-Rust written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/414owen/Euler-In-Rust/Cargo.toml
[INFO] crate 414owen/Euler-In-Rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/414owen/Euler-In-Rust/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking 414owen/Euler-In-Rust against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-7/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/414owen/Euler-In-Rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9a37489130fc127607c00b57e7b428b261595a38d0ab5dcb1e1d0f0f6b961514
[INFO] running `"docker" "start" "-a" "9a37489130fc127607c00b57e7b428b261595a38d0ab5dcb1e1d0f0f6b961514"`
[INFO] [stderr]     Checking numeral v0.3.1
[INFO] [stderr]     Checking euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/matrix/path.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut grid: &mut Vec<Vec<usize>> = &mut vec![vec![0; width + 1]; height + 1];
[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: `count`
[INFO] [stderr]  --> src/bin/factor/count.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn count(num: u64) -> u64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `count`
[INFO] [stderr]  --> src/bin/factor/count.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn count(num: u64) -> u64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::LinkedList`
[INFO] [stderr]  --> src/bin/numplay/to_words.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::collections::LinkedList;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Prime`
[INFO] [stderr]  --> src/bin/sequence/prime.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Prime {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `prime_iter`
[INFO] [stderr]   --> src/bin/sequence/prime.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | pub fn prime_iter() -> Prime {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `primes_to`
[INFO] [stderr]   --> src/bin/sequence/prime.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn primes_to(lim: usize) -> Vec<usize> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Triangular`
[INFO] [stderr]  --> src/bin/sequence/triangular.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Triangular {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `triangular`
[INFO] [stderr]   --> src/bin/sequence/triangular.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn triangular() -> Triangular {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Collatz`
[INFO] [stderr]  --> src/bin/sequence/collatz.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Collatz {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `collatz`
[INFO] [stderr]   --> src/bin/sequence/collatz.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub fn collatz(start: usize) -> Collatz {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `zero` found for type `T` in the current scope
[INFO] [stderr]   --> src/bin/numplay/to_words.rs:65:18
[INFO] [stderr]    |
[INFO] [stderr] 65 |     if num < num.zero() {
[INFO] [stderr]    |                  ^^^^ this is an associated function, not a method
[INFO] [stderr]    |
[INFO] [stderr]    = note: found the following associated functions; to be used as methods, functions must have a `self` parameter
[INFO] [stderr] note: the candidate is defined in the trait `numplay::to_words::num::Zero`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/num-traits-0.2.6/src/identities.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn zero() -> Self;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: to disambiguate the method call, write `numplay::to_words::num::Zero::zero(num)` instead
[INFO] [stderr]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]    = note: the following trait defines an item `zero`, perhaps you need to implement it:
[INFO] [stderr]            candidate #1: `numplay::to_words::num::Zero`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::LinkedList`
[INFO] [stderr]  --> src/bin/numplay/to_words.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::collections::LinkedList;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::LinkedList`
[INFO] [stderr]  --> src/bin/numplay/to_words.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::collections::LinkedList;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Fibonacci`
[INFO] [stderr]  --> src/bin/sequence/fibonacci.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Fibonacci {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fibonacci`
[INFO] [stderr]   --> src/bin/sequence/fibonacci.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn fibonacci() -> Fibonacci {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Prime`
[INFO] [stderr]  --> src/bin/sequence/prime.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Prime {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `prime_iter`
[INFO] [stderr]   --> src/bin/sequence/prime.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | pub fn prime_iter() -> Prime {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Triangular`
[INFO] [stderr]  --> src/bin/sequence/triangular.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Triangular {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `triangular`
[INFO] [stderr]   --> src/bin/sequence/triangular.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn triangular() -> Triangular {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Collatz`
[INFO] [stderr]  --> src/bin/sequence/collatz.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Collatz {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `collatz`
[INFO] [stderr]   --> src/bin/sequence/collatz.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub fn collatz(start: usize) -> Collatz {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: `()` doesn't implement `std::fmt::Display`
[INFO] [stderr]  --> src/bin/017.rs:4:20
[INFO] [stderr]   |
[INFO] [stderr] 4 |     println!("{}", numplay::to_words(11901));
[INFO] [stderr]   |                    ^^^^^^^^^^^^^^^^^^^^^^^^ `()` cannot be formatted with the default formatter
[INFO] [stderr]   |
[INFO] [stderr]   = help: the trait `std::fmt::Display` is not implemented for `()`
[INFO] [stderr]   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stderr]   = note: required by `std::fmt::Display::fmt`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/bin/numplay/to_words.rs:66:31
[INFO] [stderr]    |
[INFO] [stderr] 66 |         return to_words(num * -1).push_front("minus ")
[INFO] [stderr]    |                               ^^ expected type parameter, found integer
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `T`
[INFO] [stderr]               found type `{integer}`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `push_front` found for type `()` in the current scope
[INFO] [stderr]   --> src/bin/numplay/to_words.rs:66:35
[INFO] [stderr]    |
[INFO] [stderr] 66 |         return to_words(num * -1).push_front("minus ")
[INFO] [stderr]    |                                   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `euler`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0599]: no method named `zero` found for type `T` in the current scope
[INFO] [stderr]   --> src/bin/numplay/to_words.rs:65:18
[INFO] [stderr]    |
[INFO] [stderr] 65 |     if num < num.zero() {
[INFO] [stderr]    |                  ^^^^ this is an associated function, not a method
[INFO] [stderr]    |
[INFO] [stderr]    = note: found the following associated functions; to be used as methods, functions must have a `self` parameter
[INFO] [stderr] note: the candidate is defined in the trait `numplay::to_words::num::Zero`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/num-traits-0.2.6/src/identities.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn zero() -> Self;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: to disambiguate the method call, write `numplay::to_words::num::Zero::zero(num)` instead
[INFO] [stderr]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]    = note: the following trait defines an item `zero`, perhaps you need to implement it:
[INFO] [stderr]            candidate #1: `numplay::to_words::num::Zero`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `zero` found for type `T` in the current scope
[INFO] [stderr]   --> src/bin/numplay/to_words.rs:65:18
[INFO] [stderr]    |
[INFO] [stderr] 65 |     if num < num.zero() {
[INFO] [stderr]    |                  ^^^^ this is an associated function, not a method
[INFO] [stderr]    |
[INFO] [stderr]    = note: found the following associated functions; to be used as methods, functions must have a `self` parameter
[INFO] [stderr] note: the candidate is defined in the trait `numplay::to_words::num::Zero`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/num-traits-0.2.6/src/identities.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn zero() -> Self;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: to disambiguate the method call, write `numplay::to_words::num::Zero::zero(num)` instead
[INFO] [stderr]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]    = note: the following trait defines an item `zero`, perhaps you need to implement it:
[INFO] [stderr]            candidate #1: `numplay::to_words::num::Zero`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Fibonacci`
[INFO] [stderr]  --> src/bin/sequence/fibonacci.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Fibonacci {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fibonacci`
[INFO] [stderr]   --> src/bin/sequence/fibonacci.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn fibonacci() -> Fibonacci {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Prime`
[INFO] [stderr]  --> src/bin/sequence/prime.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Prime {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `prime_iter`
[INFO] [stderr]   --> src/bin/sequence/prime.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | pub fn prime_iter() -> Prime {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `primes_to`
[INFO] [stderr]   --> src/bin/sequence/prime.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn primes_to(lim: usize) -> Vec<usize> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Triangular`
[INFO] [stderr]  --> src/bin/sequence/triangular.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Triangular {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `triangular`
[INFO] [stderr]   --> src/bin/sequence/triangular.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn triangular() -> Triangular {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/bin/numplay/to_words.rs:66:31
[INFO] [stderr]    |
[INFO] [stderr] 66 |         return to_words(num * -1).push_front("minus ")
[INFO] [stderr]    |                               ^^ expected type parameter, found integer
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `T`
[INFO] [stderr]               found type `{integer}`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `push_front` found for type `()` in the current scope
[INFO] [stderr]   --> src/bin/numplay/to_words.rs:66:35
[INFO] [stderr]    |
[INFO] [stderr] 66 |         return to_words(num * -1).push_front("minus ")
[INFO] [stderr]    |                                   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] warning: struct is never constructed: `Fibonacci`
[INFO] [stderr]  --> src/bin/sequence/fibonacci.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Fibonacci {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fibonacci`
[INFO] [stderr]   --> src/bin/sequence/fibonacci.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn fibonacci() -> Fibonacci {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `primes_to`
[INFO] [stderr]   --> src/bin/sequence/prime.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn primes_to(lim: usize) -> Vec<usize> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Triangular`
[INFO] [stderr]  --> src/bin/sequence/triangular.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Triangular {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `triangular`
[INFO] [stderr]   --> src/bin/sequence/triangular.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn triangular() -> Triangular {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Collatz`
[INFO] [stderr]  --> src/bin/sequence/collatz.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Collatz {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `collatz`
[INFO] [stderr]   --> src/bin/sequence/collatz.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub fn collatz(start: usize) -> Collatz {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `euler`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/bin/numplay/to_words.rs:66:31
[INFO] [stderr]    |
[INFO] [stderr] 66 |         return to_words(num * -1).push_front("minus ")
[INFO] [stderr]    |                               ^^ expected type parameter, found integer
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `T`
[INFO] [stderr]               found type `{integer}`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `push_front` found for type `()` in the current scope
[INFO] [stderr]   --> src/bin/numplay/to_words.rs:66:35
[INFO] [stderr]    |
[INFO] [stderr] 66 |         return to_words(num * -1).push_front("minus ")
[INFO] [stderr]    |                                   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0308, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `euler`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: struct is never constructed: `Prime`
[INFO] [stderr]  --> src/bin/sequence/prime.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Prime {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `prime_iter`
[INFO] [stderr]   --> src/bin/sequence/prime.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | pub fn prime_iter() -> Prime {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `primes_to`
[INFO] [stderr]   --> src/bin/sequence/prime.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn primes_to(lim: usize) -> Vec<usize> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Triangular`
[INFO] [stderr]  --> src/bin/sequence/triangular.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Triangular {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `triangular`
[INFO] [stderr]   --> src/bin/sequence/triangular.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn triangular() -> Triangular {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Collatz`
[INFO] [stderr]  --> src/bin/sequence/collatz.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Collatz {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `collatz`
[INFO] [stderr]   --> src/bin/sequence/collatz.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub fn collatz(start: usize) -> Collatz {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::LinkedList`
[INFO] [stderr]  --> src/bin/numplay/to_words.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::collections::LinkedList;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Fibonacci`
[INFO] [stderr]  --> src/bin/sequence/fibonacci.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Fibonacci {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fibonacci`
[INFO] [stderr]   --> src/bin/sequence/fibonacci.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn fibonacci() -> Fibonacci {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `primes_to`
[INFO] [stderr]   --> src/bin/sequence/prime.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn primes_to(lim: usize) -> Vec<usize> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Triangular`
[INFO] [stderr]  --> src/bin/sequence/triangular.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Triangular {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `triangular`
[INFO] [stderr]   --> src/bin/sequence/triangular.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn triangular() -> Triangular {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Collatz`
[INFO] [stderr]  --> src/bin/sequence/collatz.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Collatz {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `collatz`
[INFO] [stderr]   --> src/bin/sequence/collatz.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub fn collatz(start: usize) -> Collatz {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: `()` doesn't implement `std::fmt::Display`
[INFO] [stderr]  --> src/bin/017.rs:4:20
[INFO] [stderr]   |
[INFO] [stderr] 4 |     println!("{}", numplay::to_words(11901));
[INFO] [stderr]   |                    ^^^^^^^^^^^^^^^^^^^^^^^^ `()` cannot be formatted with the default formatter
[INFO] [stderr]   |
[INFO] [stderr]   = help: the trait `std::fmt::Display` is not implemented for `()`
[INFO] [stderr]   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stderr]   = note: required by `std::fmt::Display::fmt`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `zero` found for type `T` in the current scope
[INFO] [stderr]   --> src/bin/numplay/to_words.rs:65:18
[INFO] [stderr]    |
[INFO] [stderr] 65 |     if num < num.zero() {
[INFO] [stderr]    |                  ^^^^ this is an associated function, not a method
[INFO] [stderr]    |
[INFO] [stderr]    = note: found the following associated functions; to be used as methods, functions must have a `self` parameter
[INFO] [stderr] note: the candidate is defined in the trait `numplay::to_words::num::Zero`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/num-traits-0.2.6/src/identities.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn zero() -> Self;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: to disambiguate the method call, write `numplay::to_words::num::Zero::zero(num)` instead
[INFO] [stderr]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stderr]    = note: the following trait defines an item `zero`, perhaps you need to implement it:
[INFO] [stderr]            candidate #1: `numplay::to_words::num::Zero`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/bin/numplay/to_words.rs:66:31
[INFO] [stderr]    |
[INFO] [stderr] 66 |         return to_words(num * -1).push_front("minus ")
[INFO] [stderr]    |                               ^^ expected type parameter, found integer
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `T`
[INFO] [stderr]               found type `{integer}`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `push_front` found for type `()` in the current scope
[INFO] [stderr]   --> src/bin/numplay/to_words.rs:66:35
[INFO] [stderr]    |
[INFO] [stderr] 66 |         return to_words(num * -1).push_front("minus ")
[INFO] [stderr]    |                                   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0308, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `euler`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9a37489130fc127607c00b57e7b428b261595a38d0ab5dcb1e1d0f0f6b961514"`
[INFO] running `"docker" "rm" "-f" "9a37489130fc127607c00b57e7b428b261595a38d0ab5dcb1e1d0f0f6b961514"`
[INFO] [stdout] 9a37489130fc127607c00b57e7b428b261595a38d0ab5dcb1e1d0f0f6b961514