[INFO] cloning repository https://github.com/lristar/hello-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lristar/hello-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flristar%2Fhello-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flristar%2Fhello-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e6ea6a7f6d7e131b47aa0ac5ee38f1ef13188676
[INFO] checking lristar/hello-rust against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flristar%2Fhello-rust" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lristar/hello-rust
[INFO] finished tweaking git repo https://github.com/lristar/hello-rust
[INFO] tweaked toml for git repo https://github.com/lristar/hello-rust written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lristar/hello-rust on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lristar/hello-rust 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 65fd9ac23f0b18a20ed37a55cf52b0151a72ffe7729c8cd92da150fef6024451
[INFO] running `Command { std: "docker" "start" "-a" "65fd9ac23f0b18a20ed37a55cf52b0151a72ffe7729c8cd92da150fef6024451", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "65fd9ac23f0b18a20ed37a55cf52b0151a72ffe7729c8cd92da150fef6024451", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65fd9ac23f0b18a20ed37a55cf52b0151a72ffe7729c8cd92da150fef6024451", kill_on_drop: false }`
[INFO] [stdout] 65fd9ac23f0b18a20ed37a55cf52b0151a72ffe7729c8cd92da150fef6024451
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c49a121acb25debc3a435222a6c36e3b8b65af15d7308ccbd78865c164e281ee
[INFO] running `Command { std: "docker" "start" "-a" "c49a121acb25debc3a435222a6c36e3b8b65af15d7308ccbd78865c164e281ee", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking hello_cargo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: named argument `x` is not used by name
[INFO] [stdout]    --> src/test/six_em/enum_test.rs:116:30
[INFO] [stdout]     |
[INFO] [stdout] 116 |     println!("four is{:#?}", x = four);
[INFO] [stdout]     |                      -----   ^ this named argument is referred to by position in formatting string
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this formatting argument uses named argument `x` by position
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(named_arguments_used_positionally)]` on by default
[INFO] [stdout] help: use the named argument by name to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 116 |     println!("four is{x:#?}", x = four);
[INFO] [stdout]     |                       +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ascii::AsciiExt`
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:60:11
[INFO] [stdout]    |
[INFO] [stdout] 60 | use std::{ascii::AsciiExt, u8, vec};
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: trailing semicolon in macro used in expression position
[INFO] [stdout]   --> src/macro_rule/test_macro_rule.rs:5:25
[INFO] [stdout]    |
[INFO] [stdout]  5 |       println!("Hello!");
[INFO] [stdout]    |                         ^
[INFO] [stdout] ...
[INFO] [stdout] 11 |   say_hello!()
[INFO] [stdout]    |   ------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
[INFO] [stdout]    = note: macro invocations at the end of a block are treated as expressions
[INFO] [stdout]    = note: to ignore the value produced by the macro, add a semicolon after the invocation of `say_hello`
[INFO] [stdout]    = note: `#[deny(semicolon_in_expressions_from_macros)]` on by default
[INFO] [stdout]    = note: this error originates in the macro `say_hello` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `write`
[INFO] [stdout]  --> src/one_display/test_display.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{self, write};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]   --> src/test/leetcode_test/three_LongestSubstringWithoutRepeatingCharacters_test.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     use std::collections::HashMap;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/test/leetcode_test/three_LongestSubstringWithoutRepeatingCharacters_test.rs:21:28
[INFO] [stdout]    |
[INFO] [stdout] 21 |         last[v as usize] = (i as i32);
[INFO] [stdout]    |                            ^        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 21 -         last[v as usize] = (i as i32);
[INFO] [stdout] 21 +         last[v as usize] = i as i32;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `f32::consts::E`
[INFO] [stdout]  --> src/test/nine_error/front_return_error.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{f32::consts::E, num::ParseIntError};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::Error`
[INFO] [stdout]  --> src/test/nine_error/nine_error.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/test/nine_error/nine_error.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/test/seventeen_oop/test_trait_common.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/test/sixteen_thread/test_shared_concurrency.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> src/test/ten_genericity_trait_/test_trait.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ascii::AsciiExt`
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:60:11
[INFO] [stdout]    |
[INFO] [stdout] 60 | use std::{ascii::AsciiExt, u8, vec};
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `say_hello`
[INFO] [stdout]  --> src/macro_rule/test_macro_rule.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | macro_rules! say_hello {
[INFO] [stdout]   |              ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `write`
[INFO] [stdout]  --> src/one_display/test_display.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{self, write};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]   --> src/test/leetcode_test/three_LongestSubstringWithoutRepeatingCharacters_test.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     use std::collections::HashMap;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]   --> src/test/leetcode_test/mod.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout]  1 | pub mod three_LongestSubstringWithoutRepeatingCharacters_test;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/test/leetcode_test/three_LongestSubstringWithoutRepeatingCharacters_test.rs:21:28
[INFO] [stdout]    |
[INFO] [stdout] 21 |         last[v as usize] = (i as i32);
[INFO] [stdout]    |                            ^        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 21 -         last[v as usize] = (i as i32);
[INFO] [stdout] 21 +         last[v as usize] = i as i32;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `f32::consts::E`
[INFO] [stdout]  --> src/test/nine_error/front_return_error.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{f32::consts::E, num::ParseIntError};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::Error`
[INFO] [stdout]  --> src/test/nine_error/nine_error.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/test/nine_error/nine_error.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/test/seventeen_oop/test_trait_common.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::mpsc`
[INFO] [stdout]  --> src/test/sixteen_thread/test_thread_first.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::mpsc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/test/sixteen_thread/test_thread_first.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/test/sixteen_thread/test_thread_first.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/test/sixteen_thread/test_shared_concurrency.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc` and `Mutex`
[INFO] [stdout]  --> src/test/sixteen_thread/test_shared_concurrency.rs:2:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/test/sixteen_thread/test_shared_concurrency.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> src/test/ten_genericity_trait_/test_trait.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time`
[INFO] [stdout]  --> src/test/thirteen_iters/test_closure.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::time;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/test/thirteen_iters/test_update_io.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/test/twelve_cmd/test_cmd_env.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `collections::btree_map::Values` and `fs`
[INFO] [stdout]  --> src/test/twelve_cmd/test_file.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fs, collections::btree_map::Values};
[INFO] [stdout]   |           ^^  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ptr::NonNull`
[INFO] [stdout]  --> src/test/twelve_cmd/test_env_vars.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env::{self, VarError}, ptr::NonNull};
[INFO] [stdout]   |                                  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]  --> src/test/two_three_example/types_test.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::Rng;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]  --> src/test/two_three_example/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod types_test;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::Ordering`
[INFO] [stdout]  --> src/test/two_three_example/types_test.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cmp::Ordering;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]  --> src/test/two_three_example/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod types_test;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/test/two_three_example/types_test.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]  --> src/test/two_three_example/mod.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub mod types_test;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time`
[INFO] [stdout]  --> src/test/thirteen_iters/test_closure.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::time;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::btree_map::Values`
[INFO] [stdout]  --> src/test/twelve_cmd/test_file.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fs, collections::btree_map::Values};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ptr::NonNull`
[INFO] [stdout]  --> src/test/twelve_cmd/test_env_vars.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env::{self, VarError}, ptr::NonNull};
[INFO] [stdout]   |                                  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated trait `std::ascii::AsciiExt`: use inherent methods instead
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:60:18
[INFO] [stdout]    |
[INFO] [stdout] 60 | use std::{ascii::AsciiExt, u8, vec};
[INFO] [stdout]    |                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated trait `std::ascii::AsciiExt`: use inherent methods instead
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:60:18
[INFO] [stdout]    |
[INFO] [stdout] 60 | use std::{ascii::AsciiExt, u8, vec};
[INFO] [stdout]    |                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/test/eight_collector/test_hashmap.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |         let mut hm = HashMap::new();
[INFO] [stdout]   |             ----^^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/test/nine_error/error_map.rs:58:14
[INFO] [stdout]    |
[INFO] [stdout] 58 |         Some(f) => {println!("is delision")},
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expensive_result`
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let mut expensive_result = Cacher::new(|num| {
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expensive_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `intensity`
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:35:21
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn generate_workout(intensity: u32, random_number: u32) {
[INFO] [stdout]    |                     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_intensity`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `random_number`
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:35:37
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn generate_workout(intensity: u32, random_number: u32) {
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_random_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let mut expensive_result = Cacher::new(|num| {
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/test/two_three_example/test_package.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let x = x * 2;
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Parentheses` is never used
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:62:6
[INFO] [stdout]    |
[INFO] [stdout] 62 | enum Parentheses {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Brackets` is never used
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:67:6
[INFO] [stdout]    |
[INFO] [stdout] 67 | enum Brackets {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CurlyBrackets` is never used
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:72:6
[INFO] [stdout]    |
[INFO] [stdout] 72 | enum CurlyBrackets {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Structure` is never constructed
[INFO] [stdout]  --> src/one_display/test_display.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Structure(i32);
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point2D` is never constructed
[INFO] [stdout]  --> src/one_display/test_display.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Point2D {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `List` is never constructed
[INFO] [stdout]   --> src/one_display/test_display.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct List(Vec<i32>);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HM` is never constructed
[INFO] [stdout]  --> src/test/eight_collector/test_hashmap.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct HM {
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `test_new`, `test_get_value`, `test_del_value`, `test_add_value`, and `test_get_all` are never used
[INFO] [stdout]   --> src/test/eight_collector/test_hashmap.rs:8:8
[INFO] [stdout]    |
[INFO] [stdout]  7 | impl HM {
[INFO] [stdout]    | ------- associated items in this implementation
[INFO] [stdout]  8 |     fn test_new() -> HM {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     fn test_get_value(&self, s: i32) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn test_del_value(&mut self, s: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     fn test_add_value(&mut self, k: i32, v: String) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn test_get_all(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_add_value` is never used
[INFO] [stdout]   --> src/test/eight_collector/test_hashmap.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn test_add_value() -> HM {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_del_value` is never used
[INFO] [stdout]   --> src/test/eight_collector/test_hashmap.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn test_del_value() {}
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]  --> src/test/eight_collector/collect_listLink.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum List {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `len`, and `stringify` are never used
[INFO] [stdout]   --> src/test/eight_collector/collect_listLink.rs:7:8
[INFO] [stdout]    |
[INFO] [stdout]  6 | impl List{
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout]  7 |     fn new() -> List{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 10 |     fn prepend(self ,elem: u32) ->List{
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     fn len(&self) -> u32{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn stringify(&self) ->String{
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Number` is never constructed
[INFO] [stdout]   --> src/test/eight_collector/collect_listLink.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct Number {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]  --> src/test/fifteen_smart_point/test_box_point.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum List {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CustomSmartPointer` is never constructed
[INFO] [stdout]  --> src/test/fifteen_smart_point/test_drop_point.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct CustomSmartPointer {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sign_in_count` and `active` are never read
[INFO] [stdout]  --> src/test/five_struct/struct_test.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct User {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 5 |     sign_in_count: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 6 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `no_dangle` is never used
[INFO] [stdout]   --> src/test/four_owner/test_heap_stack.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn no_dangle() -> String {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `AliasResult` is never used
[INFO] [stdout]  --> src/test/nine_error/errors_handler.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | type AliasResult<T> = Result<T, ParseIntError>;
[INFO] [stdout]   |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `double_first` is never used
[INFO] [stdout]  --> src/test/nine_error/errors_handler.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn double_first(vec: Vec<&str>) -> AliasResult<Option<i32>> {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `AliasResult` is never used
[INFO] [stdout]  --> src/test/nine_error/front_return_error.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | type AliasResult<T> = Result<T, ParseIntError>;
[INFO] [stdout]   |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multiply` is never used
[INFO] [stdout]  --> src/test/nine_error/front_return_error.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn multiply(first_number_str: &str, second_number_str: &str) -> AliasResult<i32> {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multiply2` is never used
[INFO] [stdout]   --> src/test/nine_error/front_return_error.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn multiply2(first_number_str: &str, second_number_str: &str) -> AliasResult<i32> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `printf` is never used
[INFO] [stdout]   --> src/test/nine_error/front_return_error.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn printf(result: AliasResult<i32>) {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_text_from_file` is never used
[INFO] [stdout]   --> src/test/nine_error/nine_error.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn read_text_from_file(path: String) -> io::Result<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/test/nine_error/nine_error.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | struct Person {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Job` is never constructed
[INFO] [stdout]   --> src/test/nine_error/nine_error.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 | struct Job {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PhoneNumber` is never constructed
[INFO] [stdout]   --> src/test/nine_error/nine_error.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | struct PhoneNumber {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `work_phone_area_code` is never used
[INFO] [stdout]   --> src/test/nine_error/nine_error.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | impl Person {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 81 |     fn work_phone_area_code(&self) -> Option<u8> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `AliasedResult` is never used
[INFO] [stdout]    --> src/test/nine_error/nine_error.rs:101:6
[INFO] [stdout]     |
[INFO] [stdout] 101 | type AliasedResult<T> = Result<T, ParseIntError>;
[INFO] [stdout]     |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multiply` is never used
[INFO] [stdout]    --> src/test/nine_error/nine_error.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn multiply(first_number_str: &str, second_number_str: &str) -> AliasedResult<i32> {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `printf` is never used
[INFO] [stdout]    --> src/test/nine_error/nine_error.rs:111:4
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn printf(result: AliasedResult<i32>) {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Pilot` is never used
[INFO] [stdout]  --> src/test/nineteen_top_level/test_top_trait.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait Pilot {
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Wizard` is never used
[INFO] [stdout]  --> src/test/nineteen_top_level/test_top_trait.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait Wizard {
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Human` is never constructed
[INFO] [stdout]  --> src/test/nineteen_top_level/test_top_trait.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Human;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `fly` is never used
[INFO] [stdout]   --> src/test/nineteen_top_level/test_top_trait.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Human {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 24 |   fn fly(&self) {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> src/test/nineteen_top_level/test_top_trait.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct Counter{
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_closure` is never used
[INFO] [stdout]  --> src/test/nineteen_top_level/test_top_package.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn returns_closure() -> Box<dyn Fn(i32) -> i32> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sheep` is never constructed
[INFO] [stdout]   --> src/test/nineteen_top_level/test_top_package.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Sheep {}
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cow` is never constructed
[INFO] [stdout]   --> src/test/nineteen_top_level/test_top_package.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct Cow {}
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Animal` is never used
[INFO] [stdout]   --> src/test/nineteen_top_level/test_top_package.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | trait Animal {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `random_animal` is never used
[INFO] [stdout]   --> src/test/nineteen_top_level/test_top_package.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn random_animal(random:i32) -> Box<dyn Animal>{
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SelectBox` is never constructed
[INFO] [stdout]   --> src/test/seventeen_oop/test_trait_common.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct SelectBox {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token`
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let token: Vec<String> = vec![
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_token`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v1`
[INFO] [stdout]  --> src/test/eight_collector/collector_test.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let  v1 = vec![1, 2, 3];
[INFO] [stdout]   |          ^^ help: if this is intentional, prefix it with an underscore: `_v1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v2`
[INFO] [stdout]  --> src/test/eight_collector/collector_test.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let v2:[i32;5] =[1,2,3,4,5];
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_v2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v3`
[INFO] [stdout]   --> src/test/eight_collector/collector_test.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let v3:[i32;5]=[0;5];  // 这个设置默认值五个0
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_v3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> src/test/eight_collector/collector_test.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let row = vec![
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_row`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddr` is never used
[INFO] [stdout]  --> src/test/six_em/enum_test.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum IpAddr {
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_num` is never used
[INFO] [stdout]  --> src/test/six_em/enum_test.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl IpAddr {
[INFO] [stdout]   | ----------- method in this implementation
[INFO] [stdout] 8 |     fn get_num(&self) -> i8 {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Option` is never used
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:21:6
[INFO] [stdout]    |
[INFO] [stdout] 21 | enum Option<T> {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:26:6
[INFO] [stdout]    |
[INFO] [stdout] 26 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn value_in_cents(coin: Coin) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_one` is never used
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn get_one() -> i8 {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_two` is never used
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn get_two() -> i8 {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_three` is never used
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn get_three() -> i8 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_other` is never used
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn get_other() -> i8 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `select_fn` is never used
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn select_fn(x: i8) -> i8 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/test/ten_genericity_trait_/test_genericity.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct Point<T, U> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mixup` is never used
[INFO] [stdout]   --> src/test/ten_genericity_trait_/test_genericity.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl<T, U> Point<T, U> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] 34 |     fn mixup<V, W>(self, other: Point<V, W>) -> Point<T, W> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Empty` is never constructed
[INFO] [stdout]   --> src/test/ten_genericity_trait_/test_trait.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | struct Empty;
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Null` is never constructed
[INFO] [stdout]   --> src/test/ten_genericity_trait_/test_trait.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | struct Null;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `DoubleDrop` is never used
[INFO] [stdout]   --> src/test/ten_genericity_trait_/test_trait.rs:85:7
[INFO] [stdout]    |
[INFO] [stdout] 85 | trait DoubleDrop<T,U> {
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]  --> src/test/ten_genericity_trait_/test_lifetime.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `s` is never used
[INFO] [stdout]   --> src/test/ten_genericity_trait_/test_lifetime.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | const  s: &'static str = "I have a static lifetime.";
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cacher` is never constructed
[INFO] [stdout]  --> src/test/thirteen_iters/test_closure.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Cacher<T>
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | / impl<T> Cacher<T>
[INFO] [stdout] 13 | | where
[INFO] [stdout] 14 | |     T: Fn(u32) -> u32,
[INFO] [stdout]    | |______________________- associated items in this implementation
[INFO] [stdout] 15 |   {
[INFO] [stdout] 16 |       fn new(calculation: T) -> Cacher<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |       fn value(&mut self, arg: u32) -> u32 {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generate_workout` is never used
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn generate_workout(intensity: u32, random_number: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generate_workout1` is never used
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn generate_workout1(intensity: u32, random_number: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> src/test/thirteen_iters/test_iters.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/test/thirteen_iters/test_iters.rs:54:6
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl Counter {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 54 |   fn new() -> Counter {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search` is never used
[INFO] [stdout]   --> src/test/thirteen_iters/test_update_io.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn search<'a>(query: &'a str, contest: &'a str) -> Vec<&'a str> {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search` is never used
[INFO] [stdout]   --> src/test/twelve_cmd/test_file.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn search<'a>(query:& 'a str, contest: & 'a str) -> Vec<& 'a str>{
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `env_vars` is never used
[INFO] [stdout]  --> src/test/twelve_cmd/test_env_vars.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn env_vars(env_name:String) -> Result<String, VarError> {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `curLevel` should have a snake case name
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:11:25
[INFO] [stdout]    |
[INFO] [stdout] 11 |                     let curLevel = priority_of(&a.to_string());
[INFO] [stdout]    |                         ^^^^^^^^ help: convert the identifier to snake case: `cur_level`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `frontLevel` should have a snake case name
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:12:25
[INFO] [stdout]    |
[INFO] [stdout] 12 |                     let frontLevel = priority_of(&front.to_string());
[INFO] [stdout]    |                         ^^^^^^^^^^ help: convert the identifier to snake case: `front_level`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tailPro` should have a snake case name
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub fn tailPro() {}
[INFO] [stdout]    |        ^^^^^^^ help: convert the identifier to snake case: `tail_pro`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `collect_listLink` should have a snake case name
[INFO] [stdout]  --> src/test/eight_collector/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | mod collect_listLink;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `collect_list_link`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `three_LongestSubstringWithoutRepeatingCharacters_test` should have a snake case name
[INFO] [stdout]  --> src/test/leetcode_test/mod.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub mod three_LongestSubstringWithoutRepeatingCharacters_test;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `three_longest_substring_without_repeating_characters_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `s` should have an upper case name
[INFO] [stdout]   --> src/test/ten_genericity_trait_/test_lifetime.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | const  s: &'static str = "I have a static lifetime.";
[INFO] [stdout]    |        ^ help: convert the identifier to upper case (notice the capitalization): `S`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/test/eight_collector/collector_test.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let s = "initial contents".to_string();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/test/eight_collector/collector_test.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let s = String::from("initial contents");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/test/eight_collector/test_hashmap.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |         let mut hm = HashMap::new();
[INFO] [stdout]   |             ----^^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]  --> src/test/fifteen_smart_point/test_box_point.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let list = List::Cons(1,Box::new(List::Cons(2,Box::new(List::Cons(3,Box::new(List::Nil))))));
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> src/test/fifteen_smart_point/test_drop_point.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let d = CustomSmartPointer {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/test/nine_error/error_map.rs:58:14
[INFO] [stdout]    |
[INFO] [stdout] 58 |         Some(f) => {println!("is delision")},
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cooked_carrot`
[INFO] [stdout]   --> src/test/nine_error/error_map.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let cooked_carrot = cook(chop(peer(carrot)));
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_cooked_carrot`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/test/nineteen_top_level/test_top_trait.rs:56:7
[INFO] [stdout]    |
[INFO] [stdout] 56 |   let c = Counter{};
[INFO] [stdout]    |       ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `aa`
[INFO] [stdout]    --> src/test/six_em/enum_test.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |     let aa = crate::test::five_struct::struct_test::create_user();
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_aa`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t2`
[INFO] [stdout]   --> src/test/sixteen_thread/test_thread_first.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 |    let t2 =  thread::spawn(move || {
[INFO] [stdout]    |        ^^ help: if this is intentional, prefix it with an underscore: `_t2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]   --> src/test/sixteen_thread/test_shared_concurrency.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut sum = 0;
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/test/sixteen_thread/test_shared_concurrency.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut sum = 0;
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expensive_result`
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let mut expensive_result = Cacher::new(|num| {
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expensive_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `intensity`
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:35:21
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn generate_workout(intensity: u32, random_number: u32) {
[INFO] [stdout]    |                     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_intensity`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `random_number`
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:35:37
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn generate_workout(intensity: u32, random_number: u32) {
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_random_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let mut expensive_result = Cacher::new(|num| {
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v1`
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:94:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let v1 = c.value(1);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_v1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pair`
[INFO] [stdout]    --> src/test/thirteen_iters/test_closure.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |     let pair = (2, -2);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_pair`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/test/two_three_example/test_package.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let x = x * 2;
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let res = easy_one_server::easy_one_server();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secret_number`
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let secret_number = rand::thread_rng().gen_range(1, 101);
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secret_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NUM` is never used
[INFO] [stdout]  --> src/main.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const NUM: u32 = 10;
[INFO] [stdout]   |       ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/main.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn test() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Parentheses` is never used
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:62:6
[INFO] [stdout]    |
[INFO] [stdout] 62 | enum Parentheses {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Brackets` is never used
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:67:6
[INFO] [stdout]    |
[INFO] [stdout] 67 | enum Brackets {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CurlyBrackets` is never used
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:72:6
[INFO] [stdout]    |
[INFO] [stdout] 72 | enum CurlyBrackets {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/test/eight_collector/collector_test.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |         Int(i32),
[INFO] [stdout]    |         --- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 24 -         Int(i32),
[INFO] [stdout] 24 +         Int(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/test/eight_collector/collector_test.rs:25:15
[INFO] [stdout]    |
[INFO] [stdout] 25 |         Float(f64),
[INFO] [stdout]    |         ----- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 25 -         Float(f64),
[INFO] [stdout] 25 +         Float(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/test/eight_collector/collector_test.rs:26:14
[INFO] [stdout]    |
[INFO] [stdout] 26 |         Text(String),
[INFO] [stdout]    |         ---- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 26 -         Text(String),
[INFO] [stdout] 26 +         Text(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_add_value` is never used
[INFO] [stdout]   --> src/test/eight_collector/test_hashmap.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn test_add_value() -> HM {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_del_value` is never used
[INFO] [stdout]   --> src/test/eight_collector/test_hashmap.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn test_del_value() {}
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `len` is never used
[INFO] [stdout]   --> src/test/eight_collector/collect_listLink.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout]  6 | impl List{
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 14 |     fn len(&self) -> u32{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Number` is never constructed
[INFO] [stdout]   --> src/test/eight_collector/collect_listLink.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct Number {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/test/fifteen_smart_point/test_box_point.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 |   Cons(i32, Box<List>),
[INFO] [stdout]   |   ---- ^^^  ^^^^^^^^^
[INFO] [stdout]   |   |
[INFO] [stdout]   |   fields in this variant
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 2 -   Cons(i32, Box<List>),
[INFO] [stdout] 2 +   Cons((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sign_in_count` and `active` are never read
[INFO] [stdout]  --> src/test/five_struct/struct_test.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct User {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 5 |     sign_in_count: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 6 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `no_dangle` is never used
[INFO] [stdout]   --> src/test/four_owner/test_heap_stack.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn no_dangle() -> String {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multiply` is never used
[INFO] [stdout]  --> src/test/nine_error/front_return_error.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn multiply(first_number_str: &str, second_number_str: &str) -> AliasResult<i32> {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `number` is never read
[INFO] [stdout]   --> src/test/nine_error/nine_error.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | struct PhoneNumber {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] 76 |     area_code: Option<u8>,
[INFO] [stdout] 77 |     number: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PhoneNumber` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `fly` is never used
[INFO] [stdout]   --> src/test/nineteen_top_level/test_top_trait.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Human {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 24 |   fn fly(&self) {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `options` is never read
[INFO] [stdout]   --> src/test/seventeen_oop/test_trait_common.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct SelectBox {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 34 |     options: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/test/six_em/enum_test.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     V6(i32),
[INFO] [stdout]   |     -- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 4 -     V6(i32),
[INFO] [stdout] 4 +     V6(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Nickel`, `Dime`, and `Quarter` are never constructed
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | enum Coin {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 27 |     Penny(u8),
[INFO] [stdout] 28 |     Nickel(u8),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 29 |     Dime(u8),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 30 |     Quarter(u8),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_two` is never used
[INFO] [stdout]   --> src/test/six_em/enum_test.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn get_two() -> i8 {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Empty` is never constructed
[INFO] [stdout]   --> src/test/ten_genericity_trait_/test_trait.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | struct Empty;
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Null` is never constructed
[INFO] [stdout]   --> src/test/ten_genericity_trait_/test_trait.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | struct Null;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `DoubleDrop` is never used
[INFO] [stdout]   --> src/test/ten_genericity_trait_/test_trait.rs:85:7
[INFO] [stdout]    |
[INFO] [stdout] 85 | trait DoubleDrop<T,U> {
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generate_workout` is never used
[INFO] [stdout]   --> src/test/thirteen_iters/test_closure.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn generate_workout(intensity: u32, random_number: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `curLevel` should have a snake case name
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:11:25
[INFO] [stdout]    |
[INFO] [stdout] 11 |                     let curLevel = priority_of(&a.to_string());
[INFO] [stdout]    |                         ^^^^^^^^ help: convert the identifier to snake case: `cur_level`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `frontLevel` should have a snake case name
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:12:25
[INFO] [stdout]    |
[INFO] [stdout] 12 |                     let frontLevel = priority_of(&front.to_string());
[INFO] [stdout]    |                         ^^^^^^^^^^ help: convert the identifier to snake case: `front_level`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tailPro` should have a snake case name
[INFO] [stdout]   --> src/leetcode_test/test_leetcode.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub fn tailPro() {}
[INFO] [stdout]    |        ^^^^^^^ help: convert the identifier to snake case: `tail_pro`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Stu` should have a snake case name
[INFO] [stdout]   --> src/one_display/test_display.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let Stu = Structure(4);
[INFO] [stdout]    |         ^^^ help: convert the identifier to snake case (notice the capitalization): `stu`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `collect_listLink` should have a snake case name
[INFO] [stdout]  --> src/test/eight_collector/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | mod collect_listLink;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `collect_list_link`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_linkList` should have a snake case name
[INFO] [stdout]   --> src/test/eight_collector/collect_listLink.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn test_linkList(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_link_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_typesChange` should have a snake case name
[INFO] [stdout]   --> src/test/eight_collector/collect_listLink.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn test_typesChange(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_types_change`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `three_LongestSubstringWithoutRepeatingCharacters_test` should have a snake case name
[INFO] [stdout]  --> src/test/leetcode_test/mod.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub mod three_LongestSubstringWithoutRepeatingCharacters_test;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `three_longest_substring_without_repeating_characters_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_Type` should have a snake case name
[INFO] [stdout]   --> src/test/nineteen_top_level/test_top_trait.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn test_Type(){
[INFO] [stdout]    |    ^^^^^^^^^ help: convert the identifier to snake case: `test_type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_randonAnimal` should have a snake case name
[INFO] [stdout]   --> src/test/nineteen_top_level/test_top_package.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn test_randonAnimal(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_randon_animal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `s` should have an upper case name
[INFO] [stdout]   --> src/test/ten_genericity_trait_/test_lifetime.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | const  s: &'static str = "I have a static lifetime.";
[INFO] [stdout]    |        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] help: convert the identifier to upper case (notice the capitalization)
[INFO] [stdout]    |
[INFO] [stdout] 12 - const  s: &'static str = "I have a static lifetime.";
[INFO] [stdout] 12 + const  S: &'static str = "I have a static lifetime.";
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let res = easy_one_server::easy_one_server();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `secret_number`
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let secret_number = rand::thread_rng().gen_range(1, 101);
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secret_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NUM` is never used
[INFO] [stdout]  --> src/main.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const NUM: u32 = 10;
[INFO] [stdout]   |       ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/main.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn test() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello_cargo` (lib test) due to 2 previous errors; 75 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "c49a121acb25debc3a435222a6c36e3b8b65af15d7308ccbd78865c164e281ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c49a121acb25debc3a435222a6c36e3b8b65af15d7308ccbd78865c164e281ee", kill_on_drop: false }`
[INFO] [stdout] c49a121acb25debc3a435222a6c36e3b8b65af15d7308ccbd78865c164e281ee
