[INFO] cloning repository https://github.com/willowell/classic_computer_science_problems_in_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/willowell/classic_computer_science_problems_in_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwillowell%2Fclassic_computer_science_problems_in_rust", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 572490aa168ed7e262e8ecd2cbc7e28a62b287c7
[INFO] documenting willowell/classic_computer_science_problems_in_rust against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwillowell%2Fclassic_computer_science_problems_in_rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
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[INFO] [stderr]    Compiling proc-macro2 v1.0.46
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[INFO] [stderr]     Checking cfg-if v1.0.0
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[INFO] [stderr]     Checking memoize v0.3.1
[INFO] [stderr]     Checking pathfinding v3.0.14
[INFO] [stderr]  Documenting classic_computer_science_problems v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking classic_computer_science_problems v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `to_character` is never used
[INFO] [stdout]   --> src/maze.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl Cell {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 17 |     fn to_character(&self) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `euclidean_distance_to` is never used
[INFO] [stdout]   --> src/maze.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | impl MazeLocation {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] 53 |     fn euclidean_distance_to(&self, dest: MazeLocation) -> f64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/csp.rs:59:28
[INFO] [stdout]    |
[INFO] [stdout] 59 |         for constraints in self.constraints.get(&variable) {
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 59 |         while let Some(constraints) = self.constraints.get(&variable) {
[INFO] [stdout]    |         ~~~~~~~~~~~~~~~           ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 59 |         if let Some(constraints) = self.constraints.get(&variable) {
[INFO] [stdout]    |         ~~~~~~~~~~~~           ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]   --> src/csp.rs:82:28
[INFO] [stdout]    |
[INFO] [stdout] 82 |             for domains in self.domains.get(unassigned) {
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 82 |             while let Some(domains) = self.domains.get(unassigned) {
[INFO] [stdout]    |             ~~~~~~~~~~~~~~~       ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 82 |             if let Some(domains) = self.domains.get(unassigned) {
[INFO] [stdout]    |             ~~~~~~~~~~~~       ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]  --> book/chapter_01/fib1.rs:6:26
[INFO] [stdout]   |
[INFO] [stdout] 6 | /// Java implementation: https://github.com/davecom/ClassicComputerScienceProblemsInJava/blob/master/CCSPiJ/src/chapter1/Fib1.java
[INFO] [stdout]   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://github.com/davecom/ClassicComputerScienceProblemsInJava/blob/master/CCSPiJ/src/chapter1/Fib1.java>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout]   = note: `#[warn(rustdoc::bare_urls)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]  --> book/chapter_01/calculate_pi.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 | /// Java implementation: https://github.com/davecom/ClassicComputerScienceProblemsInJava/blob/master/CCSPiJ/src/chapter1/PiCalculator.java
[INFO] [stdout]   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://github.com/davecom/ClassicComputerScienceProblemsInJava/blob/master/CCSPiJ/src/chapter1/PiCalculator.java>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout]   = note: `#[warn(rustdoc::bare_urls)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
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[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
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[INFO] [stderr]  Documenting classic_computer_science_problems v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
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[INFO] [stdout] c950fe25a00fc9cc55c0d80ee872e3d6cdae694dfa94256750bcd250bd629aab
