[INFO] cloning repository https://github.com/ruanbo1003/HelloRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ruanbo1003/HelloRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruanbo1003%2FHelloRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruanbo1003%2FHelloRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a27ebac110ebc1e076127221726965f44b2e2c68
[INFO] linting ruanbo1003/HelloRust against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruanbo1003%2FHelloRust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ruanbo1003/HelloRust
[INFO] finished tweaking git repo https://github.com/ruanbo1003/HelloRust
[INFO] tweaked toml for git repo https://github.com/ruanbo1003/HelloRust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ruanbo1003/HelloRust on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ruanbo1003/HelloRust 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" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fdc126f70b865778721cd2aaf77aaeb15b0816e289b1d9afad40df68da682102
[INFO] running `Command { std: "docker" "start" "-a" "fdc126f70b865778721cd2aaf77aaeb15b0816e289b1d9afad40df68da682102", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fdc126f70b865778721cd2aaf77aaeb15b0816e289b1d9afad40df68da682102", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdc126f70b865778721cd2aaf77aaeb15b0816e289b1d9afad40df68da682102", kill_on_drop: false }`
[INFO] [stdout] fdc126f70b865778721cd2aaf77aaeb15b0816e289b1d9afad40df68da682102
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 949d1de341537c12dd2f940ec1d3e9f38dd823e7a9c237710b217a4dc1cb59a8
[INFO] running `Command { std: "docker" "start" "-a" "949d1de341537c12dd2f940ec1d3e9f38dd823e7a9c237710b217a4dc1cb59a8", kill_on_drop: false }`
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking HelloRust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: statics have by default a `'static` lifetime
[INFO] [stdout]   --> src/syntax/variables/constant.rs:15:23
[INFO] [stdout]    |
[INFO] [stdout] 15 |     static LANGUAGE: &'static str = "Rust";
[INFO] [stdout]    |                      -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_static_lifetimes
[INFO] [stdout]    = note: `#[warn(clippy::redundant_static_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this import is redundant
[INFO] [stdout]  --> src/syntax/generics/traits.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | use String;
[INFO] [stdout]   | ^^^^^^^^^^^ help: remove it entirely
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports
[INFO] [stdout]   = note: `#[warn(clippy::single_component_path_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: statics have by default a `'static` lifetime
[INFO] [stdout]   --> src/syntax/variables/constant.rs:15:23
[INFO] [stdout]    |
[INFO] [stdout] 15 |     static LANGUAGE: &'static str = "Rust";
[INFO] [stdout]    |                      -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_static_lifetimes
[INFO] [stdout]    = note: `#[warn(clippy::redundant_static_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this import is redundant
[INFO] [stdout]  --> src/syntax/generics/traits.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | use String;
[INFO] [stdout]   | ^^^^^^^^^^^ help: remove it entirely
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports
[INFO] [stdout]   = note: `#[warn(clippy::single_component_path_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this operation has no effect
[INFO] [stdout]   --> src/syntax/variables/basic.rs:29:36
[INFO] [stdout]    |
[INFO] [stdout] 29 |     const ONE_HOUR_SECONDS : u32 = 1 * 60 * 60;
[INFO] [stdout]    |                                    ^^^^^^ help: consider reducing it to: `60`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stdout]    = note: `#[warn(clippy::identity_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this operation has no effect
[INFO] [stdout]   --> src/syntax/variables/constant.rs:12:27
[INFO] [stdout]    |
[INFO] [stdout] 12 |     const ONE_HOUR: i32 = 1 * 60 * 60;
[INFO] [stdout]    |                           ^^^^^^ help: consider reducing it to: `60`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: direct implementation of `ToString`
[INFO] [stdout]   --> src/syntax/variables/from_to_casting.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | /     impl ToString for Circle {
[INFO] [stdout] 76 | |         fn to_string(&self) -> String {
[INFO] [stdout] 77 | |             format!("Circle data:{}", self.data)
[INFO] [stdout] 78 | |         }
[INFO] [stdout] 79 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: prefer implementing `Display` instead
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#to_string_trait_impl
[INFO] [stdout]    = note: `#[warn(clippy::to_string_trait_impl)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this operation has no effect
[INFO] [stdout]   --> src/syntax/variables/basic.rs:29:36
[INFO] [stdout]    |
[INFO] [stdout] 29 |     const ONE_HOUR_SECONDS : u32 = 1 * 60 * 60;
[INFO] [stdout]    |                                    ^^^^^^ help: consider reducing it to: `60`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stdout]    = note: `#[warn(clippy::identity_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this operation has no effect
[INFO] [stdout]   --> src/syntax/variables/constant.rs:12:27
[INFO] [stdout]    |
[INFO] [stdout] 12 |     const ONE_HOUR: i32 = 1 * 60 * 60;
[INFO] [stdout]    |                           ^^^^^^ help: consider reducing it to: `60`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/functions.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     return 1;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 31 -     return 1;
[INFO] [stdout] 31 +     1
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/functions.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     return x;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 38 -     return x;
[INFO] [stdout] 38 +     x
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/syntax/functions.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let x = 3;
[INFO] [stdout]    |     ---------- unnecessary `let` binding
[INFO] [stdout] 42 |     x
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout]    = note: `#[warn(clippy::let_and_return)]` on by default
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 41 ~     
[INFO] [stdout] 42 ~     3
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/functions.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     return x + 1;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 49 -     return x + 1;
[INFO] [stdout] 49 +     x + 1
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/functions.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     return (a + b, a-b);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 53 -     return (a + b, a-b);
[INFO] [stdout] 53 +     (a + b, a-b)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this OR pattern can be rewritten using a range
[INFO] [stdout]  --> src/syntax/control_flow/match_flow.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |             2 | 3 | 4 => println!("num is in [2, 3, 4]"),
[INFO] [stdout]   |             ^^^^^^^^^ help: try: `2..=4`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_range_patterns
[INFO] [stdout]   = note: `#[warn(clippy::manual_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: direct implementation of `ToString`
[INFO] [stdout]   --> src/syntax/variables/from_to_casting.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 | /     impl ToString for Circle {
[INFO] [stdout] 76 | |         fn to_string(&self) -> String {
[INFO] [stdout] 77 | |             format!("Circle data:{}", self.data)
[INFO] [stdout] 78 | |         }
[INFO] [stdout] 79 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: prefer implementing `Display` instead
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#to_string_trait_impl
[INFO] [stdout]    = note: `#[warn(clippy::to_string_trait_impl)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant guard
[INFO] [stdout]    --> src/syntax/control_flow/match_flow.rs:107:23
[INFO] [stdout]     |
[INFO] [stdout] 107 |             (x, y) if x == 0 => {
[INFO] [stdout]     |                       ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_guards
[INFO] [stdout]     = note: `#[warn(clippy::redundant_guards)]` on by default
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 107 -             (x, y) if x == 0 => {
[INFO] [stdout] 107 +             (0, y) => {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant guard
[INFO] [stdout]    --> src/syntax/control_flow/match_flow.rs:110:23
[INFO] [stdout]     |
[INFO] [stdout] 110 |             (x, y) if y == 0 => {
[INFO] [stdout]     |                       ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_guards
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 110 -             (x, y) if y == 0 => {
[INFO] [stdout] 110 +             (x, 0) => {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this match could be written as a `let` statement
[INFO] [stdout]   --> src/syntax/control_flow/match_reference_destructure.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | /         match *reference {
[INFO] [stdout] 24 | |             val=> {
[INFO] [stdout] 25 | |                 println!("val:{}", val);  // 4
[INFO] [stdout] 26 | |             }
[INFO] [stdout] 27 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_single_binding
[INFO] [stdout]    = note: `#[warn(clippy::match_single_binding)]` on by default
[INFO] [stdout] help: consider using a `let` statement
[INFO] [stdout]    |
[INFO] [stdout] 23 ~         let val = *reference;
[INFO] [stdout] 24 +         {
[INFO] [stdout] 25 +             println!("val:{}", val);  // 4
[INFO] [stdout] 26 +         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stdout]   --> src/syntax/control_flow/match_reference_destructure.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let ref reference_now = 4;
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^----- help: try: `let reference_now = &4;`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stdout]    = note: `#[warn(clippy::toplevel_ref_arg)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stdout]   --> src/syntax/control_flow/match_reference_destructure.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let ref mut mut_reference = 4;
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^^^^^----- help: try: `let mut_reference = &mut 4;`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this match could be written as a `let` statement
[INFO] [stdout]   --> src/syntax/control_flow/match_reference_destructure.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 | /             match val1 {
[INFO] [stdout] 49 | |                 ref v => {
[INFO] [stdout] 50 | |                     // type of `v` is `&i32`
[INFO] [stdout] 51 | |                     println!("{}, {}", v, *v);  // 1, 1
[INFO] [stdout] 52 | |                 }
[INFO] [stdout] 53 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_single_binding
[INFO] [stdout] help: consider using a `let` statement
[INFO] [stdout]    |
[INFO] [stdout] 48 ~             let ref v = val1;
[INFO] [stdout] 49 +             {
[INFO] [stdout] 50 +                 // type of `v` is `&i32`
[INFO] [stdout] 51 +                 println!("{}, {}", v, *v);  // 1, 1
[INFO] [stdout] 52 +             }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this match could be written as a `let` statement
[INFO] [stdout]   --> src/syntax/control_flow/match_reference_destructure.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 | /             match val1 {
[INFO] [stdout] 55 | |                 v => {
[INFO] [stdout] 56 | |                     // type of `v` is `i32`
[INFO] [stdout] 57 | |                     println!("{}", v)
[INFO] [stdout] 58 | |                 }
[INFO] [stdout] 59 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_single_binding
[INFO] [stdout] help: consider using a `let` statement
[INFO] [stdout]    |
[INFO] [stdout] 54 ~             let v = val1;
[INFO] [stdout] 55 +             println!("{}", v);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this match could be written as a `let` statement
[INFO] [stdout]   --> src/syntax/control_flow/match_reference_destructure.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 62 | /             match val2 {
[INFO] [stdout] 63 | |                 ref mut v => {
[INFO] [stdout] 64 | |                     // type of `v` is `&mut i32`
[INFO] [stdout] 65 | |                     *v += 10;
[INFO] [stdout] 66 | |                 }
[INFO] [stdout] 67 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_single_binding
[INFO] [stdout] help: consider using a `let` statement
[INFO] [stdout]    |
[INFO] [stdout] 62 ~             let ref mut v = val2;
[INFO] [stdout] 63 +             {
[INFO] [stdout] 64 +                 // type of `v` is `&mut i32`
[INFO] [stdout] 65 +                 *v += 10;
[INFO] [stdout] 66 +             }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/functions.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     return 1;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 31 -     return 1;
[INFO] [stdout] 31 +     1
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/functions.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     return x;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 38 -     return x;
[INFO] [stdout] 38 +     x
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/syntax/functions.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let x = 3;
[INFO] [stdout]    |     ---------- unnecessary `let` binding
[INFO] [stdout] 42 |     x
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout]    = note: `#[warn(clippy::let_and_return)]` on by default
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 41 ~     
[INFO] [stdout] 42 ~     3
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/functions.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     return x + 1;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 49 -     return x + 1;
[INFO] [stdout] 49 +     x + 1
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/functions.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 |     return (a + b, a-b);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 53 -     return (a + b, a-b);
[INFO] [stdout] 53 +     (a + b, a-b)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/structs/declare_struct.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 | /     return PersonWithNoCopy{
[INFO] [stdout] 81 | |         name,  // field name is the same as parameter,
[INFO] [stdout] 82 | |         age: 10,
[INFO] [stdout] 83 | |     };
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 80 ~     PersonWithNoCopy{
[INFO] [stdout] 81 +         name,  // field name is the same as parameter,
[INFO] [stdout] 82 +         age: 10,
[INFO] [stdout] 83 ~     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/structs/declare_struct.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 87 | /     return PersonWithNoCopy {
[INFO] [stdout] 88 | |         age: 100,  // we assign the value of age here
[INFO] [stdout] 89 | |         ..person  // the rest fields value will come from parameter `person`
[INFO] [stdout] 90 | |     };
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 87 ~     PersonWithNoCopy {
[INFO] [stdout] 88 +         age: 100,  // we assign the value of age here
[INFO] [stdout] 89 +         ..person  // the rest fields value will come from parameter `person`
[INFO] [stdout] 90 ~     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/structs/declare_struct.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 | /     return PersonWithCopy {
[INFO] [stdout] 95 | |         age: 101,
[INFO] [stdout] 96 | |         ..person
[INFO] [stdout] 97 | |     };
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 94 ~     PersonWithCopy {
[INFO] [stdout] 95 +         age: 101,
[INFO] [stdout] 96 +         ..person
[INFO] [stdout] 97 ~     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this OR pattern can be rewritten using a range
[INFO] [stdout]  --> src/syntax/control_flow/match_flow.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |             2 | 3 | 4 => println!("num is in [2, 3, 4]"),
[INFO] [stdout]   |             ^^^^^^^^^ help: try: `2..=4`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_range_patterns
[INFO] [stdout]   = note: `#[warn(clippy::manual_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant guard
[INFO] [stdout]    --> src/syntax/control_flow/match_flow.rs:107:23
[INFO] [stdout]     |
[INFO] [stdout] 107 |             (x, y) if x == 0 => {
[INFO] [stdout]     |                       ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_guards
[INFO] [stdout]     = note: `#[warn(clippy::redundant_guards)]` on by default
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 107 -             (x, y) if x == 0 => {
[INFO] [stdout] 107 +             (0, y) => {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant guard
[INFO] [stdout]    --> src/syntax/control_flow/match_flow.rs:110:23
[INFO] [stdout]     |
[INFO] [stdout] 110 |             (x, y) if y == 0 => {
[INFO] [stdout]     |                       ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_guards
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 110 -             (x, y) if y == 0 => {
[INFO] [stdout] 110 +             (x, 0) => {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this match could be written as a `let` statement
[INFO] [stdout]   --> src/syntax/control_flow/match_reference_destructure.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | /         match *reference {
[INFO] [stdout] 24 | |             val=> {
[INFO] [stdout] 25 | |                 println!("val:{}", val);  // 4
[INFO] [stdout] 26 | |             }
[INFO] [stdout] 27 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_single_binding
[INFO] [stdout]    = note: `#[warn(clippy::match_single_binding)]` on by default
[INFO] [stdout] help: consider using a `let` statement
[INFO] [stdout]    |
[INFO] [stdout] 23 ~         let val = *reference;
[INFO] [stdout] 24 +         {
[INFO] [stdout] 25 +             println!("val:{}", val);  // 4
[INFO] [stdout] 26 +         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stdout]   --> src/syntax/control_flow/match_reference_destructure.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let ref reference_now = 4;
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^----- help: try: `let reference_now = &4;`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stdout]    = note: `#[warn(clippy::toplevel_ref_arg)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stdout]   --> src/syntax/control_flow/match_reference_destructure.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let ref mut mut_reference = 4;
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^^^^^----- help: try: `let mut_reference = &mut 4;`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this match could be written as a `let` statement
[INFO] [stdout]   --> src/syntax/control_flow/match_reference_destructure.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 | /             match val1 {
[INFO] [stdout] 49 | |                 ref v => {
[INFO] [stdout] 50 | |                     // type of `v` is `&i32`
[INFO] [stdout] 51 | |                     println!("{}, {}", v, *v);  // 1, 1
[INFO] [stdout] 52 | |                 }
[INFO] [stdout] 53 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_single_binding
[INFO] [stdout] help: consider using a `let` statement
[INFO] [stdout]    |
[INFO] [stdout] 48 ~             let ref v = val1;
[INFO] [stdout] 49 +             {
[INFO] [stdout] 50 +                 // type of `v` is `&i32`
[INFO] [stdout] 51 +                 println!("{}, {}", v, *v);  // 1, 1
[INFO] [stdout] 52 +             }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this match could be written as a `let` statement
[INFO] [stdout]   --> src/syntax/control_flow/match_reference_destructure.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 | /             match val1 {
[INFO] [stdout] 55 | |                 v => {
[INFO] [stdout] 56 | |                     // type of `v` is `i32`
[INFO] [stdout] 57 | |                     println!("{}", v)
[INFO] [stdout] 58 | |                 }
[INFO] [stdout] 59 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_single_binding
[INFO] [stdout] help: consider using a `let` statement
[INFO] [stdout]    |
[INFO] [stdout] 54 ~             let v = val1;
[INFO] [stdout] 55 +             println!("{}", v);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this match could be written as a `let` statement
[INFO] [stdout]   --> src/syntax/control_flow/match_reference_destructure.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 62 | /             match val2 {
[INFO] [stdout] 63 | |                 ref mut v => {
[INFO] [stdout] 64 | |                     // type of `v` is `&mut i32`
[INFO] [stdout] 65 | |                     *v += 10;
[INFO] [stdout] 66 | |                 }
[INFO] [stdout] 67 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_single_binding
[INFO] [stdout] help: consider using a `let` statement
[INFO] [stdout]    |
[INFO] [stdout] 62 ~             let ref mut v = val2;
[INFO] [stdout] 63 +             {
[INFO] [stdout] 64 +                 // type of `v` is `&mut i32`
[INFO] [stdout] 65 +                 *v += 10;
[INFO] [stdout] 66 +             }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]   --> src/syntax/enums/enum_match.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | /     match x {
[INFO] [stdout] 30 | |         None => None,
[INFO] [stdout] 31 | |         Some(i) => Some(i + 1),
[INFO] [stdout] 32 | |     }
[INFO] [stdout]    | |_____^ help: try: `x.map(|i| i + 1)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout]    = note: `#[warn(clippy::manual_map)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
[INFO] [stdout]   --> src/syntax/enums/if_let.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | /         match config_max {
[INFO] [stdout] 11 | |             Some(val) => println!("Some(val):{}", val),
[INFO] [stdout] 12 | |             _ => (),
[INFO] [stdout] 13 | |         }
[INFO] [stdout]    | |_________^ help: try: `if let Some(val) = config_max { println!("Some(val):{}", val) }`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stdout]    = note: `#[warn(clippy::single_match)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this match could be written as a `let` statement
[INFO] [stdout]   --> src/syntax/enums/alias.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | /     match we {
[INFO] [stdout] 28 | |         _WebEvent=> println!("web event"),
[INFO] [stdout] 29 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_single_binding
[INFO] [stdout] help: consider using a `let` statement
[INFO] [stdout]    |
[INFO] [stdout] 27 ~     let _WebEvent = we;
[INFO] [stdout] 28 +     println!("web event")
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `format!`
[INFO] [stdout]   --> src/syntax/enums/list.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |                 format!("Nil")
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"Nil".to_string()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stdout]    = note: `#[warn(clippy::useless_format)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/structs/declare_struct.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 | /     return PersonWithNoCopy{
[INFO] [stdout] 81 | |         name,  // field name is the same as parameter,
[INFO] [stdout] 82 | |         age: 10,
[INFO] [stdout] 83 | |     };
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 80 ~     PersonWithNoCopy{
[INFO] [stdout] 81 +         name,  // field name is the same as parameter,
[INFO] [stdout] 82 +         age: 10,
[INFO] [stdout] 83 ~     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/structs/declare_struct.rs:87:5
[INFO] [stdout]    |
[INFO] [stdout] 87 | /     return PersonWithNoCopy {
[INFO] [stdout] 88 | |         age: 100,  // we assign the value of age here
[INFO] [stdout] 89 | |         ..person  // the rest fields value will come from parameter `person`
[INFO] [stdout] 90 | |     };
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 87 ~     PersonWithNoCopy {
[INFO] [stdout] 88 +         age: 100,  // we assign the value of age here
[INFO] [stdout] 89 +         ..person  // the rest fields value will come from parameter `person`
[INFO] [stdout] 90 ~     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/structs/declare_struct.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 | /     return PersonWithCopy {
[INFO] [stdout] 95 | |         age: 101,
[INFO] [stdout] 96 | |         ..person
[INFO] [stdout] 97 | |     };
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 94 ~     PersonWithCopy {
[INFO] [stdout] 95 +         age: 101,
[INFO] [stdout] 96 +         ..person
[INFO] [stdout] 97 ~     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `push` immediately after creation
[INFO] [stdout]   --> src/syntax/collections/vector.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | /         let mut v = Vec::new();
[INFO] [stdout] 27 | |         v.push(1);
[INFO] [stdout] 28 | |         v.push(2);
[INFO] [stdout] 29 | |         v.push(3);
[INFO] [stdout]    | |__________________^ help: consider using the `vec![]` macro: `let v = vec![..];`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#vec_init_then_push
[INFO] [stdout]    = note: `#[warn(clippy::vec_init_then_push)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]   --> src/syntax/enums/enum_match.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | /     match x {
[INFO] [stdout] 30 | |         None => None,
[INFO] [stdout] 31 | |         Some(i) => Some(i + 1),
[INFO] [stdout] 32 | |     }
[INFO] [stdout]    | |_____^ help: try: `x.map(|i| i + 1)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout]    = note: `#[warn(clippy::manual_map)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
[INFO] [stdout]   --> src/syntax/enums/if_let.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | /         match config_max {
[INFO] [stdout] 11 | |             Some(val) => println!("Some(val):{}", val),
[INFO] [stdout] 12 | |             _ => (),
[INFO] [stdout] 13 | |         }
[INFO] [stdout]    | |_________^ help: try: `if let Some(val) = config_max { println!("Some(val):{}", val) }`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stdout]    = note: `#[warn(clippy::single_match)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this match could be written as a `let` statement
[INFO] [stdout]   --> src/syntax/enums/alias.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | /     match we {
[INFO] [stdout] 28 | |         _WebEvent=> println!("web event"),
[INFO] [stdout] 29 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_single_binding
[INFO] [stdout] help: consider using a `let` statement
[INFO] [stdout]    |
[INFO] [stdout] 27 ~     let _WebEvent = we;
[INFO] [stdout] 28 +     println!("web event")
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `format!`
[INFO] [stdout]   --> src/syntax/enums/list.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |                 format!("Nil")
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^ help: consider using `.to_string()`: `"Nil".to_string()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stdout]    = note: `#[warn(clippy::useless_format)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `push` immediately after creation
[INFO] [stdout]   --> src/syntax/collections/vector.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | /         let mut v = Vec::new();
[INFO] [stdout] 27 | |         v.push(1);
[INFO] [stdout] 28 | |         v.push(2);
[INFO] [stdout] 29 | |         v.push(3);
[INFO] [stdout]    | |__________________^ help: consider using the `vec![]` macro: `let v = vec![..];`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#vec_init_then_push
[INFO] [stdout]    = note: `#[warn(clippy::vec_init_then_push)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `match` expression can be replaced with `?`
[INFO] [stdout]   --> src/syntax/errors/helpers.rs:31:33
[INFO] [stdout]    |
[INFO] [stdout] 31 |           let mut username_file = match username_file_result {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 32 | |             Ok(file) => file,
[INFO] [stdout] 33 | |             Err(e) => return Err(e),
[INFO] [stdout] 34 | |         };
[INFO] [stdout]    | |_________^ help: try instead: `username_file_result?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#question_mark
[INFO] [stdout]    = note: `#[warn(clippy::question_mark)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/generic_function.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     return largest;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 48 -     return largest;
[INFO] [stdout] 48 +     largest
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/traits.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         return String::from("default name");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 21 -         return String::from("default name");
[INFO] [stdout] 21 +         String::from("default name")
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/traits.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         return format!("Blog:{}", self.title);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 34 -         return format!("Blog:{}", self.title);
[INFO] [stdout] 34 +         format!("Blog:{}", self.title)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/traits.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         return format!("Twitter:{}", self.username);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 47 -         return format!("Twitter:{}", self.username);
[INFO] [stdout] 47 +         format!("Twitter:{}", self.username)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/traits.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |         return format!("{}", self.username);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 51 -         return format!("{}", self.username);
[INFO] [stdout] 51 +         format!("{}", self.username)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `format!`
[INFO] [stdout]   --> src/syntax/generics/traits.rs:51:16
[INFO] [stdout]    |
[INFO] [stdout] 51 |         return format!("{}", self.username);
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `self.username.to_string()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/syntax/generics/traits.rs:184:5
[INFO] [stdout]     |
[INFO] [stdout] 184 | /     return if t {
[INFO] [stdout] 185 | |         Blog {
[INFO] [stdout] 186 | |             title: "title-1".to_string(),
[INFO] [stdout] 187 | |             context: "context-1".to_string(),
[INFO] [stdout] ...   |
[INFO] [stdout] 200 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 184 ~     if t {
[INFO] [stdout] 185 +         Blog {
[INFO] [stdout] 186 +             title: "title-1".to_string(),
[INFO] [stdout] 187 +             context: "context-1".to_string(),
[INFO] [stdout] 188 +         }
[INFO] [stdout] 189 +     } else {
[INFO] [stdout] 190 +         Blog {
[INFO] [stdout] 191 +             title: "title-2".to_string(),
[INFO] [stdout] 192 +             context: "context-2".to_string(),
[INFO] [stdout] 193 +         }
[INFO] [stdout] 194 + 
[INFO] [stdout] 195 +         // error: `if` and `else` have incompatible types.
[INFO] [stdout] 196 +         // Twitter {
[INFO] [stdout] 197 +         //     username: "username".to_string(),
[INFO] [stdout] 198 +         //     context: "context-twitter".to_string(),
[INFO] [stdout] 199 +         // }
[INFO] [stdout] 200 +     }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `match` expression can be replaced with `?`
[INFO] [stdout]   --> src/syntax/errors/helpers.rs:31:33
[INFO] [stdout]    |
[INFO] [stdout] 31 |           let mut username_file = match username_file_result {
[INFO] [stdout]    |  _________________________________^
[INFO] [stdout] 32 | |             Ok(file) => file,
[INFO] [stdout] 33 | |             Err(e) => return Err(e),
[INFO] [stdout] 34 | |         };
[INFO] [stdout]    | |_________^ help: try instead: `username_file_result?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#question_mark
[INFO] [stdout]    = note: `#[warn(clippy::question_mark)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/trait_bound_return.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     return Person{};
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 15 -     return Person{};
[INFO] [stdout] 15 +     Person{}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/trait_bound_return.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     return Dog{};
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 18 -     return Dog{};
[INFO] [stdout] 18 +     Dog{}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/trait_bound_return.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |         return Person{};
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 23 -         return Person{};
[INFO] [stdout] 23 +         Person{}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/trait_bound_return.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         return Person{};
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 25 -         return Person{};
[INFO] [stdout] 25 +         Person{}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` has identical blocks
[INFO] [stdout]   --> src/syntax/generics/trait_bound_return.rs:22:18
[INFO] [stdout]    |
[INFO] [stdout] 22 |       if data > 10 {
[INFO] [stdout]    |  __________________^
[INFO] [stdout] 23 | |         return Person{};
[INFO] [stdout] 24 | |     } else {
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout] note: same as this
[INFO] [stdout]   --> src/syntax/generics/trait_bound_return.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |       } else {
[INFO] [stdout]    |  ____________^
[INFO] [stdout] 25 | |         return Person{};
[INFO] [stdout] 26 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#if_same_then_else
[INFO] [stdout]    = note: `#[warn(clippy::if_same_then_else)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/generic_function.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     return largest;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 48 -     return largest;
[INFO] [stdout] 48 +     largest
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/basic.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     return intensity;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 33 -     return intensity;
[INFO] [stdout] 33 +     intensity
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/traits.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         return String::from("default name");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 21 -         return String::from("default name");
[INFO] [stdout] 21 +         String::from("default name")
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/traits.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         return format!("Blog:{}", self.title);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 34 -         return format!("Blog:{}", self.title);
[INFO] [stdout] 34 +         format!("Blog:{}", self.title)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/traits.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |         return format!("Twitter:{}", self.username);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 47 -         return format!("Twitter:{}", self.username);
[INFO] [stdout] 47 +         format!("Twitter:{}", self.username)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/traits.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |         return format!("{}", self.username);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 51 -         return format!("{}", self.username);
[INFO] [stdout] 51 +         format!("{}", self.username)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `format!`
[INFO] [stdout]   --> src/syntax/generics/traits.rs:51:16
[INFO] [stdout]    |
[INFO] [stdout] 51 |         return format!("{}", self.username);
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `self.username.to_string()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         return f(3);
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 26 -         return f(3);
[INFO] [stdout] 26 +         f(3)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |             return x * 2;
[INFO] [stdout]    |             ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 34 -             return x * 2;
[INFO] [stdout] 34 +             x * 2
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/syntax/generics/traits.rs:184:5
[INFO] [stdout]     |
[INFO] [stdout] 184 | /     return if t {
[INFO] [stdout] 185 | |         Blog {
[INFO] [stdout] 186 | |             title: "title-1".to_string(),
[INFO] [stdout] 187 | |             context: "context-1".to_string(),
[INFO] [stdout] ...   |
[INFO] [stdout] 200 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 184 ~     if t {
[INFO] [stdout] 185 +         Blog {
[INFO] [stdout] 186 +             title: "title-1".to_string(),
[INFO] [stdout] 187 +             context: "context-1".to_string(),
[INFO] [stdout] 188 +         }
[INFO] [stdout] 189 +     } else {
[INFO] [stdout] 190 +         Blog {
[INFO] [stdout] 191 +             title: "title-2".to_string(),
[INFO] [stdout] 192 +             context: "context-2".to_string(),
[INFO] [stdout] 193 +         }
[INFO] [stdout] 194 + 
[INFO] [stdout] 195 +         // error: `if` and `else` have incompatible types.
[INFO] [stdout] 196 +         // Twitter {
[INFO] [stdout] 197 +         //     username: "username".to_string(),
[INFO] [stdout] 198 +         //     context: "context-twitter".to_string(),
[INFO] [stdout] 199 +         // }
[INFO] [stdout] 200 +     }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |             return x * 2;
[INFO] [stdout]    |             ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 47 -             return x * 2;
[INFO] [stdout] 47 +             x * 2
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |             return x * 2;
[INFO] [stdout]    |             ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 59 -             return x * 2;
[INFO] [stdout] 59 +             x * 2
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `std::mem::drop` with a value that does not implement `Drop`. Dropping such a type only extends its contained lifetimes
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |             std::mem::drop(fp);  // drop fp here, so this closure is FnOnce
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: argument has type `syntax::closures::closure_as_parameter::FnParam`
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:58:28
[INFO] [stdout]    |
[INFO] [stdout] 58 |             std::mem::drop(fp);  // drop fp here, so this closure is FnOnce
[INFO] [stdout]    |                            ^^
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#drop_non_drop
[INFO] [stdout]    = note: `#[warn(clippy::drop_non_drop)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |         return f(3);
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 72 -         return f(3);
[INFO] [stdout] 72 +         f(3)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/trait_bound_return.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     return Person{};
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 15 -     return Person{};
[INFO] [stdout] 15 +     Person{}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/trait_bound_return.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     return Dog{};
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 18 -     return Dog{};
[INFO] [stdout] 18 +     Dog{}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/trait_bound_return.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |         return Person{};
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 23 -         return Person{};
[INFO] [stdout] 23 +         Person{}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/generics/trait_bound_return.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         return Person{};
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 25 -         return Person{};
[INFO] [stdout] 25 +         Person{}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` has identical blocks
[INFO] [stdout]   --> src/syntax/generics/trait_bound_return.rs:22:18
[INFO] [stdout]    |
[INFO] [stdout] 22 |       if data > 10 {
[INFO] [stdout]    |  __________________^
[INFO] [stdout] 23 | |         return Person{};
[INFO] [stdout] 24 | |     } else {
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout] note: same as this
[INFO] [stdout]   --> src/syntax/generics/trait_bound_return.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |       } else {
[INFO] [stdout]    |  ____________^
[INFO] [stdout] 25 | |         return Person{};
[INFO] [stdout] 26 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#if_same_then_else
[INFO] [stdout]    = note: `#[warn(clippy::if_same_then_else)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |             return x * 2;
[INFO] [stdout]    |             ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 91 -             return x * 2;
[INFO] [stdout] 91 +             x * 2
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/syntax/closures/closure_as_parameter.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |         return 10;
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 123 -         return 10;
[INFO] [stdout] 123 +         10
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_return_value.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     return move || println!("{}", text);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 30 -     return move || println!("{}", text);
[INFO] [stdout] 30 +     move || println!("{}", text)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/basic.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     return intensity;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 33 -     return intensity;
[INFO] [stdout] 33 +     intensity
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         return f(3);
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 26 -         return f(3);
[INFO] [stdout] 26 +         f(3)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |             return x * 2;
[INFO] [stdout]    |             ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 34 -             return x * 2;
[INFO] [stdout] 34 +             x * 2
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |             return x * 2;
[INFO] [stdout]    |             ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 47 -             return x * 2;
[INFO] [stdout] 47 +             x * 2
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |             return x * 2;
[INFO] [stdout]    |             ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 59 -             return x * 2;
[INFO] [stdout] 59 +             x * 2
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `std::mem::drop` with a value that does not implement `Drop`. Dropping such a type only extends its contained lifetimes
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |             std::mem::drop(fp);  // drop fp here, so this closure is FnOnce
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: argument has type `syntax::closures::closure_as_parameter::FnParam`
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:58:28
[INFO] [stdout]    |
[INFO] [stdout] 58 |             std::mem::drop(fp);  // drop fp here, so this closure is FnOnce
[INFO] [stdout]    |                            ^^
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#drop_non_drop
[INFO] [stdout]    = note: `#[warn(clippy::drop_non_drop)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |         return f(3);
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 72 -         return f(3);
[INFO] [stdout] 72 +         f(3)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_parameter.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |             return x * 2;
[INFO] [stdout]    |             ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 91 -             return x * 2;
[INFO] [stdout] 91 +             x * 2
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/syntax/closures/closure_as_parameter.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |         return 10;
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 123 -         return 10;
[INFO] [stdout] 123 +         10
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/closures/closure_as_return_value.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     return move || println!("{}", text);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 30 -     return move || println!("{}", text);
[INFO] [stdout] 30 +     move || println!("{}", text)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/ownerships/ownership_and_scope.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     return s;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 27 -     return s;
[INFO] [stdout] 27 +     s
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/ownerships/ownership_and_scope.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     return src;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 32 -     return src;
[INFO] [stdout] 32 +     src
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/ownerships/references.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 |     return src.len();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 80 -     return src.len();
[INFO] [stdout] 80 +     src.len()
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: writing `&String` instead of `&str` involves a new object where a slice will do
[INFO] [stdout]   --> src/syntax/ownerships/references.rs:79:24
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn cal_string_len(src: &String) -> usize { // src is a reference to a String
[INFO] [stdout]    |                        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stdout]    = note: `#[warn(clippy::ptr_arg)]` on by default
[INFO] [stdout] help: change this to
[INFO] [stdout]    |
[INFO] [stdout] 79 - fn cal_string_len(src: &String) -> usize { // src is a reference to a String
[INFO] [stdout] 79 + fn cal_string_len(src: &str) -> usize { // src is a reference to a String
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taken reference of right operand
[INFO] [stdout]   --> src/syntax/ownerships/slices.rs:55:30
[INFO] [stdout]    |
[INFO] [stdout] 55 |     println!("is equal: {}", s1 == &[2, 3])  // true
[INFO] [stdout]    |                              ^^^^^^-------
[INFO] [stdout]    |                                    |
[INFO] [stdout]    |                                    help: use the right value directly: `[2, 3]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stdout]    = note: `#[warn(clippy::op_ref)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant slicing of the whole range
[INFO] [stdout]   --> src/syntax/string_and_slice/string_to_slice.rs:17:18
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let s5 = &s4[..];
[INFO] [stdout]    |                  ^^^^^^^ help: use the original value instead: `s4`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_slicing
[INFO] [stdout]    = note: `#[warn(clippy::redundant_slicing)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/lifetime/lifetime_in_function_call.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | /     return if x.len() >= y.len() {
[INFO] [stdout] 50 | |         x
[INFO] [stdout] 51 | |     } else {
[INFO] [stdout] 52 | |         y
[INFO] [stdout] 53 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 49 ~     if x.len() >= y.len() {
[INFO] [stdout] 50 +         x
[INFO] [stdout] 51 +     } else {
[INFO] [stdout] 52 +         y
[INFO] [stdout] 53 +     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant slicing of the whole range
[INFO] [stdout]   --> src/syntax/lifetime/lifetime_annotation_elision.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     &s[..]
[INFO] [stdout]    |     ^^^^^^ help: use the original value instead: `s`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_slicing
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'a
[INFO] [stdout]   --> src/syntax/lifetime/lifetime_annotation_elision.rs:26:23
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn first_world_test_2<'a>(s: &'a str) -> &'a str {
[INFO] [stdout]    |                       ^^      ^^          ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout]    = note: `#[warn(clippy::needless_lifetimes)]` on by default
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 26 - fn first_world_test_2<'a>(s: &'a str) -> &'a str {
[INFO] [stdout] 26 + fn first_world_test_2(s: &str) -> &str {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/lifetime/lifetime_annotation_elision.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     return &s[..];
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 34 -     return &s[..];
[INFO] [stdout] 34 +     &s[..]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant slicing of the whole range
[INFO] [stdout]   --> src/syntax/lifetime/lifetime_annotation_elision.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     return &s[..];
[INFO] [stdout]    |            ^^^^^^ help: use the original value instead: `s`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_slicing
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/ownerships/ownership_and_scope.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     return s;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 27 -     return s;
[INFO] [stdout] 27 +     s
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: literal with an empty format string
[INFO] [stdout]   --> src/syntax/format/mod.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 |         println!("{}", "hello");
[INFO] [stdout]    |                        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_literal
[INFO] [stdout]    = note: `#[warn(clippy::print_literal)]` on by default
[INFO] [stdout] help: try
[INFO] [stdout]    |
[INFO] [stdout] 18 -         println!("{}", "hello");
[INFO] [stdout] 18 +         println!("hello");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/ownerships/ownership_and_scope.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     return src;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 32 -     return src;
[INFO] [stdout] 32 +     src
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: literal with an empty format string
[INFO] [stdout]   --> src/syntax/format/mod.rs:20:27
[INFO] [stdout]    |
[INFO] [stdout] 20 |         println!("{} {}", "hello", "world");
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_literal
[INFO] [stdout] help: try
[INFO] [stdout]    |
[INFO] [stdout] 20 -         println!("{} {}", "hello", "world");
[INFO] [stdout] 20 +         println!("hello world");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: literal with an empty format string
[INFO] [stdout]   --> src/syntax/format/mod.rs:29:29
[INFO] [stdout]    |
[INFO] [stdout] 29 |         println!("{0} {1}", "hello", "world");
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_literal
[INFO] [stdout] help: try
[INFO] [stdout]    |
[INFO] [stdout] 29 -         println!("{0} {1}", "hello", "world");
[INFO] [stdout] 29 +         println!("hello world");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/ownerships/references.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 |     return src.len();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 80 -     return src.len();
[INFO] [stdout] 80 +     src.len()
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: writing `&String` instead of `&str` involves a new object where a slice will do
[INFO] [stdout]   --> src/syntax/ownerships/references.rs:79:24
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn cal_string_len(src: &String) -> usize { // src is a reference to a String
[INFO] [stdout]    |                        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stdout]    = note: `#[warn(clippy::ptr_arg)]` on by default
[INFO] [stdout] help: change this to
[INFO] [stdout]    |
[INFO] [stdout] 79 - fn cal_string_len(src: &String) -> usize { // src is a reference to a String
[INFO] [stdout] 79 + fn cal_string_len(src: &str) -> usize { // src is a reference to a String
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: taken reference of right operand
[INFO] [stdout]   --> src/syntax/ownerships/slices.rs:55:30
[INFO] [stdout]    |
[INFO] [stdout] 55 |     println!("is equal: {}", s1 == &[2, 3])  // true
[INFO] [stdout]    |                              ^^^^^^-------
[INFO] [stdout]    |                                    |
[INFO] [stdout]    |                                    help: use the right value directly: `[2, 3]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stdout]    = note: `#[warn(clippy::op_ref)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant slicing of the whole range
[INFO] [stdout]   --> src/syntax/string_and_slice/string_to_slice.rs:17:18
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let s5 = &s4[..];
[INFO] [stdout]    |                  ^^^^^^^ help: use the original value instead: `s4`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_slicing
[INFO] [stdout]    = note: `#[warn(clippy::redundant_slicing)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/lifetime/lifetime_in_function_call.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | /     return if x.len() >= y.len() {
[INFO] [stdout] 50 | |         x
[INFO] [stdout] 51 | |     } else {
[INFO] [stdout] 52 | |         y
[INFO] [stdout] 53 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 49 ~     if x.len() >= y.len() {
[INFO] [stdout] 50 +         x
[INFO] [stdout] 51 +     } else {
[INFO] [stdout] 52 +         y
[INFO] [stdout] 53 +     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: local variable doesn't need to be boxed here
[INFO] [stdout]   --> src/scope/ownership_and_move.rs:46:24
[INFO] [stdout]    |
[INFO] [stdout] 46 |         fn release_box(c: Box<i32>) {}
[INFO] [stdout]    |                        ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#boxed_local
[INFO] [stdout]    = note: `#[warn(clippy::boxed_local)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant slicing of the whole range
[INFO] [stdout]   --> src/syntax/lifetime/lifetime_annotation_elision.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     &s[..]
[INFO] [stdout]    |     ^^^^^^ help: use the original value instead: `s`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_slicing
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'a
[INFO] [stdout]   --> src/syntax/lifetime/lifetime_annotation_elision.rs:26:23
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn first_world_test_2<'a>(s: &'a str) -> &'a str {
[INFO] [stdout]    |                       ^^      ^^          ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout]    = note: `#[warn(clippy::needless_lifetimes)]` on by default
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 26 - fn first_world_test_2<'a>(s: &'a str) -> &'a str {
[INFO] [stdout] 26 + fn first_world_test_2(s: &str) -> &str {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: local variable doesn't need to be boxed here
[INFO] [stdout]   --> src/scope/borrow.rs:17:31
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn task_ownership_box_i32(b: Box<i32>) {
[INFO] [stdout]    |                               ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#boxed_local
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stdout]   --> src/scope/borrow.rs:19:30
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn ref_borrow_box_i32(b: &Box<i32>) {
[INFO] [stdout]    |                              ^^^^^^^^^ help: try: `&i32`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stdout]    = note: `#[warn(clippy::borrowed_box)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/syntax/lifetime/lifetime_annotation_elision.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     return &s[..];
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 34 -     return &s[..];
[INFO] [stdout] 34 +     &s[..]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant slicing of the whole range
[INFO] [stdout]   --> src/syntax/lifetime/lifetime_annotation_elision.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     return &s[..];
[INFO] [stdout]    |            ^^^^^^ help: use the original value instead: `s`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_slicing
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: literal with an empty format string
[INFO] [stdout]   --> src/syntax/format/mod.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 |         println!("{}", "hello");
[INFO] [stdout]    |                        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_literal
[INFO] [stdout]    = note: `#[warn(clippy::print_literal)]` on by default
[INFO] [stdout] help: try
[INFO] [stdout]    |
[INFO] [stdout] 18 -         println!("{}", "hello");
[INFO] [stdout] 18 +         println!("hello");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stdout]   --> src/scope/borrow.rs:85:13
[INFO] [stdout]    |
[INFO] [stdout] 85 |         let ref ref_c1 = c;
[INFO] [stdout]    |         ----^^^^^^^^^^----- help: try: `let ref_c1 = &c;`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: literal with an empty format string
[INFO] [stdout]   --> src/syntax/format/mod.rs:20:27
[INFO] [stdout]    |
[INFO] [stdout] 20 |         println!("{} {}", "hello", "world");
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_literal
[INFO] [stdout] help: try
[INFO] [stdout]    |
[INFO] [stdout] 20 -         println!("{} {}", "hello", "world");
[INFO] [stdout] 20 +         println!("hello world");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: literal with an empty format string
[INFO] [stdout]   --> src/syntax/format/mod.rs:29:29
[INFO] [stdout]    |
[INFO] [stdout] 29 |         println!("{0} {1}", "hello", "world");
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_literal
[INFO] [stdout] help: try
[INFO] [stdout]    |
[INFO] [stdout] 29 -         println!("{0} {1}", "hello", "world");
[INFO] [stdout] 29 +         println!("hello world");
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'a
[INFO] [stdout]   --> src/scope/lifetime/function.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn add_one<'a>(x: &'a mut i32) {
[INFO] [stdout]    |            ^^      ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 14 - fn add_one<'a>(x: &'a mut i32) {
[INFO] [stdout] 14 + fn add_one(x: &mut i32) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'b
[INFO] [stdout]   --> src/scope/lifetime/function.rs:22:15
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn pass_x<'a, 'b>(x: &'a i32, y: &'b i32) -> &'a i32 {
[INFO] [stdout]    |               ^^                  ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 22 - fn pass_x<'a, 'b>(x: &'a i32, y: &'b i32) -> &'a i32 {
[INFO] [stdout] 22 + fn pass_x<'a>(x: &'a i32, y: &i32) -> &'a i32 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/scope/lifetime/function.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     return x;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 23 -     return x;
[INFO] [stdout] 23 +     x
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'a, 'b
[INFO] [stdout]   --> src/scope/lifetime/annotation.rs:16:14
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn print_ref<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stdout]    |              ^^  ^^      ^^          ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 16 - fn print_ref<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stdout] 16 + fn print_ref(x: &i32, y: &i32) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this lifetime isn't used in the function definition
[INFO] [stdout]   --> src/scope/lifetime/annotation.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn foo<'a>() {
[INFO] [stdout]    |        ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stdout]    = note: `#[warn(clippy::extra_unused_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'a
[INFO] [stdout]   --> src/scope/lifetime/struct_method.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn add_one<'a>(&'a mut self) {
[INFO] [stdout]    |                ^^   ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 18 -     fn add_one<'a>(&'a mut self) {
[INFO] [stdout] 18 +     fn add_one(&mut self) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'a
[INFO] [stdout]   --> src/scope/lifetime/struct_method.rs:22:14
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn print<'a>(&'a self) {
[INFO] [stdout]    |              ^^   ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 22 -     fn print<'a>(&'a self) {
[INFO] [stdout] 22 +     fn print(&self) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]  --> src/util/variable.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     return std::any::type_name::<T>();
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]   |
[INFO] [stdout] 3 -     return std::any::type_name::<T>();
[INFO] [stdout] 3 +     std::any::type_name::<T>()
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: local variable doesn't need to be boxed here
[INFO] [stdout]   --> src/scope/ownership_and_move.rs:46:24
[INFO] [stdout]    |
[INFO] [stdout] 46 |         fn release_box(c: Box<i32>) {}
[INFO] [stdout]    |                        ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#boxed_local
[INFO] [stdout]    = note: `#[warn(clippy::boxed_local)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `contains()` instead of `iter().any()` is more efficient
[INFO] [stdout]  --> src/stds/iterator_any.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 |         println!("{}", v1.iter().any(|&x|x==1));  // true
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `v1.contains(&1)`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_contains
[INFO] [stdout]   = note: `#[warn(clippy::manual_contains)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `contains()` instead of `iter().any()` is more efficient
[INFO] [stdout]  --> src/stds/iterator_any.rs:9:24
[INFO] [stdout]   |
[INFO] [stdout] 9 |         println!("{}", v2.iter().any(|&x|x==1));  // false
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `v2.contains(&1)`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_contains
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `contains()` instead of `iter().any()` is more efficient
[INFO] [stdout]   --> src/stds/iterator_any.rs:16:24
[INFO] [stdout]    |
[INFO] [stdout] 16 |         println!("{}", a1.iter().any(|&x|x == 2));  // true
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `a1.contains(&2)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_contains
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `contains()` instead of `iter().any()` is more efficient
[INFO] [stdout]   --> src/stds/iterator_any.rs:17:24
[INFO] [stdout]    |
[INFO] [stdout] 17 |         println!("{}", a2.iter().any(|&x|x == 2));  // false
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `a2.contains(&2)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_contains
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: local variable doesn't need to be boxed here
[INFO] [stdout]   --> src/scope/borrow.rs:17:31
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn task_ownership_box_i32(b: Box<i32>) {
[INFO] [stdout]    |                               ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#boxed_local
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stdout]   --> src/scope/borrow.rs:19:30
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn ref_borrow_box_i32(b: &Box<i32>) {
[INFO] [stdout]    |                              ^^^^^^^^^ help: try: `&i32`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stdout]    = note: `#[warn(clippy::borrowed_box)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stdout]   --> src/scope/borrow.rs:85:13
[INFO] [stdout]    |
[INFO] [stdout] 85 |         let ref ref_c1 = c;
[INFO] [stdout]    |         ----^^^^^^^^^^----- help: try: `let ref_c1 = &c;`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'a
[INFO] [stdout]   --> src/scope/lifetime/function.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn add_one<'a>(x: &'a mut i32) {
[INFO] [stdout]    |            ^^      ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 14 - fn add_one<'a>(x: &'a mut i32) {
[INFO] [stdout] 14 + fn add_one(x: &mut i32) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'b
[INFO] [stdout]   --> src/scope/lifetime/function.rs:22:15
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn pass_x<'a, 'b>(x: &'a i32, y: &'b i32) -> &'a i32 {
[INFO] [stdout]    |               ^^                  ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 22 - fn pass_x<'a, 'b>(x: &'a i32, y: &'b i32) -> &'a i32 {
[INFO] [stdout] 22 + fn pass_x<'a>(x: &'a i32, y: &i32) -> &'a i32 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/scope/lifetime/function.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     return x;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 23 -     return x;
[INFO] [stdout] 23 +     x
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'a, 'b
[INFO] [stdout]   --> src/scope/lifetime/annotation.rs:16:14
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn print_ref<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stdout]    |              ^^  ^^      ^^          ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 16 - fn print_ref<'a, 'b>(x: &'a i32, y: &'b i32) {
[INFO] [stdout] 16 + fn print_ref(x: &i32, y: &i32) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this lifetime isn't used in the function definition
[INFO] [stdout]   --> src/scope/lifetime/annotation.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn foo<'a>() {
[INFO] [stdout]    |        ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stdout]    = note: `#[warn(clippy::extra_unused_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'a
[INFO] [stdout]   --> src/scope/lifetime/struct_method.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn add_one<'a>(&'a mut self) {
[INFO] [stdout]    |                ^^   ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 18 -     fn add_one<'a>(&'a mut self) {
[INFO] [stdout] 18 +     fn add_one(&mut self) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'a
[INFO] [stdout]   --> src/scope/lifetime/struct_method.rs:22:14
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn print<'a>(&'a self) {
[INFO] [stdout]    |              ^^   ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 22 -     fn print<'a>(&'a self) {
[INFO] [stdout] 22 +     fn print(&self) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/control_flow/for_flow.rs:30:25
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let names = vec!["Tom", "Jack", "John"];
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `["Tom", "Jack", "John"]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout]    = note: `#[warn(clippy::useless_vec)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/control_flow/match_flow.rs:71:24
[INFO] [stdout]    |
[INFO] [stdout] 71 |       let color_tuples = vec![
[INFO] [stdout]    |  ________________________^
[INFO] [stdout] 72 | |         Color::Red,
[INFO] [stdout] 73 | |         Color::Green(1),
[INFO] [stdout] 74 | |         Color::Yellow(String::from("tree")),
[INFO] [stdout] 75 | |         Color::Gray(10, 20, 30),
[INFO] [stdout] 76 | |     ];
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] help: you can use an array directly
[INFO] [stdout]    |
[INFO] [stdout] 71 ~     let color_tuples = [Color::Red,
[INFO] [stdout] 72 +         Color::Green(1),
[INFO] [stdout] 73 +         Color::Yellow(String::from("tree")),
[INFO] [stdout] 74 ~         Color::Gray(10, 20, 30)];
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]    --> src/syntax/control_flow/match_flow.rs:95:17
[INFO] [stdout]     |
[INFO] [stdout]  95 |       let pairs = vec![
[INFO] [stdout]     |  _________________^
[INFO] [stdout]  96 | |         (0, 0),  // x == y
[INFO] [stdout]  97 | |         (0, 1),  // x == 0
[INFO] [stdout]  98 | |         (1, 0),  // y == 0
[INFO] [stdout]  99 | |         (10, 100),  // don't care
[INFO] [stdout] 100 | |     ];
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] help: you can use an array directly
[INFO] [stdout]     |
[INFO] [stdout]  95 ~     let pairs = [(0, 0),  // x == y
[INFO] [stdout]  96 +         (0, 1),  // x == 0
[INFO] [stdout]  97 +         (1, 0),  // y == 0
[INFO] [stdout]  98 ~         (10, 100)];
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/collections/vector.rs:36:17
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let v = vec![1, 2, 3, 4, 5];
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3, 4, 5]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/errors/unrecoverable.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let v = vec![1, 2, 3];
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/iterator/iterators.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let v1 = vec![1, 2, 3];
[INFO] [stdout]    |                  ^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/iterator/iterators.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let v = vec![1, 2, 3];
[INFO] [stdout]    |                 ^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/iterator/iterators.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let v = vec![1, 2, 3];
[INFO] [stdout]    |                 ^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/iterator/iterators.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let v = vec![1, 2, 3];
[INFO] [stdout]    |                 ^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]  --> src/stds/iterator_any.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let v1 = vec![1, 2, 3];
[INFO] [stdout]   |                  ^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3]`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]  --> src/stds/iterator_any.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let v2 = vec![7, 8, 9];
[INFO] [stdout]   |                  ^^^^^^^^^^^^^ help: you can use an array directly: `[7, 8, 9]`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]  --> src/stds/iterator_find.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let v1 = vec![1, 2, 3, 4, 5];
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3, 4, 5]`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/syntax/smart_pointer/refcell_pointer.rs:29:27
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |                           ^^                 ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/util/unit_test.rs:19:17
[INFO] [stdout]    |
[INFO] [stdout] 19 |         assert!(!(1 == 2));
[INFO] [stdout]    |                 ^^^^^^^^^ help: try: `(1 != 2)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]    = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/util/unit_test.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |         assert!(!(true == false));
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^ help: try: `(true != false)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this assertion is always `true`
[INFO] [stdout]   --> src/util/unit_test.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |         assert!(!(1 == 2));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: remove the assertion
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assertions_on_constants
[INFO] [stdout]    = note: `#[warn(clippy::assertions_on_constants)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]  --> src/util/variable.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     return std::any::type_name::<T>();
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]   |
[INFO] [stdout] 3 -     return std::any::type_name::<T>();
[INFO] [stdout] 3 +     std::any::type_name::<T>()
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `contains()` instead of `iter().any()` is more efficient
[INFO] [stdout]  --> src/stds/iterator_any.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 |         println!("{}", v1.iter().any(|&x|x==1));  // true
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `v1.contains(&1)`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_contains
[INFO] [stdout]   = note: `#[warn(clippy::manual_contains)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `contains()` instead of `iter().any()` is more efficient
[INFO] [stdout]  --> src/stds/iterator_any.rs:9:24
[INFO] [stdout]   |
[INFO] [stdout] 9 |         println!("{}", v2.iter().any(|&x|x==1));  // false
[INFO] [stdout]   |                        ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `v2.contains(&1)`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_contains
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `contains()` instead of `iter().any()` is more efficient
[INFO] [stdout]   --> src/stds/iterator_any.rs:16:24
[INFO] [stdout]    |
[INFO] [stdout] 16 |         println!("{}", a1.iter().any(|&x|x == 2));  // true
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `a1.contains(&2)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_contains
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `contains()` instead of `iter().any()` is more efficient
[INFO] [stdout]   --> src/stds/iterator_any.rs:17:24
[INFO] [stdout]    |
[INFO] [stdout] 17 |         println!("{}", a2.iter().any(|&x|x == 2));  // false
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `a2.contains(&2)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_contains
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/control_flow/for_flow.rs:30:25
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let names = vec!["Tom", "Jack", "John"];
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `["Tom", "Jack", "John"]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout]    = note: `#[warn(clippy::useless_vec)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/control_flow/match_flow.rs:71:24
[INFO] [stdout]    |
[INFO] [stdout] 71 |       let color_tuples = vec![
[INFO] [stdout]    |  ________________________^
[INFO] [stdout] 72 | |         Color::Red,
[INFO] [stdout] 73 | |         Color::Green(1),
[INFO] [stdout] 74 | |         Color::Yellow(String::from("tree")),
[INFO] [stdout] 75 | |         Color::Gray(10, 20, 30),
[INFO] [stdout] 76 | |     ];
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] help: you can use an array directly
[INFO] [stdout]    |
[INFO] [stdout] 71 ~     let color_tuples = [Color::Red,
[INFO] [stdout] 72 +         Color::Green(1),
[INFO] [stdout] 73 +         Color::Yellow(String::from("tree")),
[INFO] [stdout] 74 ~         Color::Gray(10, 20, 30)];
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]    --> src/syntax/control_flow/match_flow.rs:95:17
[INFO] [stdout]     |
[INFO] [stdout]  95 |       let pairs = vec![
[INFO] [stdout]     |  _________________^
[INFO] [stdout]  96 | |         (0, 0),  // x == y
[INFO] [stdout]  97 | |         (0, 1),  // x == 0
[INFO] [stdout]  98 | |         (1, 0),  // y == 0
[INFO] [stdout]  99 | |         (10, 100),  // don't care
[INFO] [stdout] 100 | |     ];
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] help: you can use an array directly
[INFO] [stdout]     |
[INFO] [stdout]  95 ~     let pairs = [(0, 0),  // x == y
[INFO] [stdout]  96 +         (0, 1),  // x == 0
[INFO] [stdout]  97 +         (1, 0),  // y == 0
[INFO] [stdout]  98 ~         (10, 100)];
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/collections/vector.rs:36:17
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let v = vec![1, 2, 3, 4, 5];
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3, 4, 5]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/errors/unrecoverable.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let v = vec![1, 2, 3];
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/iterator/iterators.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let v1 = vec![1, 2, 3];
[INFO] [stdout]    |                  ^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/iterator/iterators.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let v = vec![1, 2, 3];
[INFO] [stdout]    |                 ^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/iterator/iterators.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let v = vec![1, 2, 3];
[INFO] [stdout]    |                 ^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/syntax/iterator/iterators.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let v = vec![1, 2, 3];
[INFO] [stdout]    |                 ^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]  --> src/stds/iterator_any.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let v1 = vec![1, 2, 3];
[INFO] [stdout]   |                  ^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3]`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]  --> src/stds/iterator_any.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let v2 = vec![7, 8, 9];
[INFO] [stdout]   |                  ^^^^^^^^^^^^^ help: you can use an array directly: `[7, 8, 9]`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]  --> src/stds/iterator_find.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let v1 = vec![1, 2, 3, 4, 5];
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `[1, 2, 3, 4, 5]`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/syntax/smart_pointer/refcell_pointer.rs:29:27
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |                           ^^                 ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.58s
[INFO] running `Command { std: "docker" "inspect" "949d1de341537c12dd2f940ec1d3e9f38dd823e7a9c237710b217a4dc1cb59a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "949d1de341537c12dd2f940ec1d3e9f38dd823e7a9c237710b217a4dc1cb59a8", kill_on_drop: false }`
[INFO] [stdout] 949d1de341537c12dd2f940ec1d3e9f38dd823e7a9c237710b217a4dc1cb59a8