[INFO] cloning repository https://github.com/2Tricky4u/Rust-By-Example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/2Tricky4u/Rust-By-Example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F2Tricky4u%2FRust-By-Example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F2Tricky4u%2FRust-By-Example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a0e6df8a821771846501584d6ca52183bfd43c62
[INFO] checking 2Tricky4u/Rust-By-Example against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F2Tricky4u%2FRust-By-Example" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/2Tricky4u/Rust-By-Example
[INFO] finished tweaking git repo https://github.com/2Tricky4u/Rust-By-Example
[INFO] tweaked toml for git repo https://github.com/2Tricky4u/Rust-By-Example written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/2Tricky4u/Rust-By-Example on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/2Tricky4u/Rust-By-Example 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a1f2012da1bb07f8f61f7d564b55e4f7c88e1cca9741f30ae318757924833e83
[INFO] running `Command { std: "docker" "start" "-a" "a1f2012da1bb07f8f61f7d564b55e4f7c88e1cca9741f30ae318757924833e83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1f2012da1bb07f8f61f7d564b55e4f7c88e1cca9741f30ae318757924833e83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1f2012da1bb07f8f61f7d564b55e4f7c88e1cca9741f30ae318757924833e83", kill_on_drop: false }`
[INFO] [stdout] a1f2012da1bb07f8f61f7d564b55e4f7c88e1cca9741f30ae318757924833e83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 00ffab1040cfe7f4721588d17a2eacd8e5524d5c559d405aeed24c975d971685
[INFO] running `Command { std: "docker" "start" "-a" "00ffab1040cfe7f4721588d17a2eacd8e5524d5c559d405aeed24c975d971685", kill_on_drop: false }`
[INFO] [stderr]     Checking untitled v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Formatter` and `write`
[INFO] [stdout]  --> src/hello.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{write, Formatter};
[INFO] [stdout]   |                ^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::Into`
[INFO] [stdout]   --> src/conversion.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     use std::convert::Into;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]   --> src/flow_control.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         'inner: loop {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Formatter` and `write`
[INFO] [stdout]  --> src/hello.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{write, Formatter};
[INFO] [stdout]   |                ^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::Into`
[INFO] [stdout]   --> src/conversion.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     use std::convert::Into;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]   --> src/flow_control.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         'inner: loop {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/flow_control.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |             break 'outer;
[INFO] [stdout]    |             ------------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 71 |         println!("This point will never be reached");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/flow_control.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |             break 'outer;
[INFO] [stdout]    |             ------------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 71 |         println!("This point will never be reached");
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `logical`
[INFO] [stdout]  --> src/primitives.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let logical: bool = true;
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_logical`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_float`
[INFO] [stdout]  --> src/primitives.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let a_float: f64 = 1.0;  // Regular annotation
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `an_integer`
[INFO] [stdout]  --> src/primitives.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let an_integer   = 5i32; // Suffix annotation
[INFO] [stdout]   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_an_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `default_float`
[INFO] [stdout]   --> src/primitives.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let default_float   = 3.0; // `f64`
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `default_integer`
[INFO] [stdout]   --> src/primitives.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let default_integer = 7;   // `i32`
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inferred_type` is assigned to, but never used
[INFO] [stdout]   --> src/primitives.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut inferred_type = 12; // Type i64 is inferred from another line.
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_inferred_type` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mutable` is assigned to, but never used
[INFO] [stdout]   --> src/primitives.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut mutable = 12; // Mutable `i32`
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_mutable` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mutable`
[INFO] [stdout]   --> src/primitives.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mutable = true;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_array`
[INFO] [stdout]   --> src/primitives.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let my_array: [i32; 5] = [1, 2, 3, 4, 5];
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_array`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_tuple`
[INFO] [stdout]   --> src/primitives.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let my_tuple = (5u32, 1u8, true, -5.04f32);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_tuple`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `inferred_type` is never read
[INFO] [stdout]   --> src/primitives.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     inferred_type = 4294967296i64;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `mutable` is never read
[INFO] [stdout]   --> src/primitives.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     mutable = 21;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `too_long_tuple`
[INFO] [stdout]    --> src/primitives.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let too_long_tuple = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_too_long_tuple`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/custom_types.rs:147:9
[INFO] [stdout]     |
[INFO] [stdout] 147 |     let x = Operations::Add;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_string`
[INFO] [stdout]  --> src/conversion.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let my_string = String::from(my_str);
[INFO] [stdout]   |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `logical`
[INFO] [stdout]  --> src/primitives.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let logical: bool = true;
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_logical`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_float`
[INFO] [stdout]  --> src/primitives.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let a_float: f64 = 1.0;  // Regular annotation
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `an_integer`
[INFO] [stdout]  --> src/primitives.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let an_integer   = 5i32; // Suffix annotation
[INFO] [stdout]   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_an_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `default_float`
[INFO] [stdout]   --> src/primitives.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let default_float   = 3.0; // `f64`
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `default_integer`
[INFO] [stdout]   --> src/primitives.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let default_integer = 7;   // `i32`
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inferred_type` is assigned to, but never used
[INFO] [stdout]   --> src/primitives.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut inferred_type = 12; // Type i64 is inferred from another line.
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_inferred_type` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mutable` is assigned to, but never used
[INFO] [stdout]   --> src/primitives.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut mutable = 12; // Mutable `i32`
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_mutable` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mutable`
[INFO] [stdout]   --> src/primitives.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mutable = true;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_array`
[INFO] [stdout]   --> src/primitives.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let my_array: [i32; 5] = [1, 2, 3, 4, 5];
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_array`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_tuple`
[INFO] [stdout]   --> src/primitives.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let my_tuple = (5u32, 1u8, true, -5.04f32);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_tuple`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `inferred_type` is never read
[INFO] [stdout]   --> src/primitives.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     inferred_type = 4294967296i64;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `mutable` is never read
[INFO] [stdout]   --> src/primitives.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     mutable = 21;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/flow_control.rs:531:8
[INFO] [stdout]     |
[INFO] [stdout] 531 |     if let FooEx::Bar = a {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/flow_control.rs:520:21
[INFO] [stdout]     |
[INFO] [stdout] 520 |     if let Foo::Qux(value @ 100) = c {
[INFO] [stdout]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `LANGUAGE` is never used
[INFO] [stdout]   --> src/main.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | static LANGUAGE: &str = "Rust";
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `THRESHOLD` is never used
[INFO] [stdout]   --> src/main.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | const THRESHOLD: i32 = 10;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello` is never used
[INFO] [stdout]  --> src/hello.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) fn hello() {
[INFO] [stdout]   |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_debug` is never used
[INFO] [stdout]   --> src/hello.rs:66:15
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub(crate) fn hello_debug() {
[INFO] [stdout]    |               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_display` is never used
[INFO] [stdout]    --> src/hello.rs:105:15
[INFO] [stdout]     |
[INFO] [stdout] 105 | pub(crate) fn hello_display() {
[INFO] [stdout]     |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_list` is never used
[INFO] [stdout]    --> src/hello.rs:186:15
[INFO] [stdout]     |
[INFO] [stdout] 186 | pub(crate) fn hello_list() {
[INFO] [stdout]     |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_formating` is never used
[INFO] [stdout]    --> src/hello.rs:218:15
[INFO] [stdout]     |
[INFO] [stdout] 218 | pub(crate) fn hello_formating() {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `primitives` is never used
[INFO] [stdout]  --> src/primitives.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub (crate) fn primitives() {
[INFO] [stdout]   |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `primitives_literals` is never used
[INFO] [stdout]   --> src/primitives.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub (crate) fn primitives_literals() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `primitives_tuples` is never used
[INFO] [stdout]   --> src/primitives.rs:65:16
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub (crate) fn primitives_tuples() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `primitives_arrays` is never used
[INFO] [stdout]    --> src/primitives.rs:132:16
[INFO] [stdout]     |
[INFO] [stdout] 132 | pub (crate) fn primitives_arrays() {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `customs_enums` is never used
[INFO] [stdout]   --> src/custom_types.rs:99:16
[INFO] [stdout]    |
[INFO] [stdout] 99 | pub (crate) fn customs_enums() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]    --> src/custom_types.rs:149:12
[INFO] [stdout]     |
[INFO] [stdout] 148 |     impl VeryVerboseEnumOfThingsToDoWithNumbers {
[INFO] [stdout]     |     ------------------------------------------- method in this implementation
[INFO] [stdout] 149 |         fn run(&self, x: i32, y: i32) -> i32 {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `customs_linked_list` is never used
[INFO] [stdout]    --> src/custom_types.rs:217:16
[INFO] [stdout]     |
[INFO] [stdout] 217 | pub (crate) fn customs_linked_list() {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `len`, and `stringify` are never used
[INFO] [stdout]    --> src/custom_types.rs:229:12
[INFO] [stdout]     |
[INFO] [stdout] 227 |     impl List {
[INFO] [stdout]     |     --------- associated items in this implementation
[INFO] [stdout] 228 |         // Create an empty list
[INFO] [stdout] 229 |         fn new() -> List {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 235 |         fn prepend(self, elem: u32) -> List {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 241 |         fn len(&self) -> u32 {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 258 |         fn stringify(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `customs_const` is never used
[INFO] [stdout]    --> src/custom_types.rs:285:16
[INFO] [stdout]     |
[INFO] [stdout] 285 | pub (crate) fn customs_const() {
[INFO] [stdout]     |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variables` is never used
[INFO] [stdout]  --> src/variables.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) fn variables() {
[INFO] [stdout]   |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `types_casting` is never used
[INFO] [stdout]  --> src/types.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub (crate) fn types_casting() {
[INFO] [stdout]   |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `conversion` is never used
[INFO] [stdout]  --> src/conversion.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub (crate) fn conversion() {
[INFO] [stdout]   |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `conversion_try` is never used
[INFO] [stdout]   --> src/conversion.rs:36:16
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub (crate) fn conversion_try() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `conversion_string` is never used
[INFO] [stdout]   --> src/conversion.rs:69:16
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub (crate) fn conversion_string() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `expression` is never used
[INFO] [stdout]    --> src/conversion.rs:110:16
[INFO] [stdout]     |
[INFO] [stdout] 110 | pub (crate) fn expression() {
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ifelse` is never used
[INFO] [stdout]  --> src/flow_control.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub (crate) fn ifelse() {
[INFO] [stdout]   |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loops` is never used
[INFO] [stdout]   --> src/flow_control.rs:30:16
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub (crate) fn loops() {
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `nesting` is never used
[INFO] [stdout]   --> src/flow_control.rs:57:16
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub (crate) fn nesting() {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns` is never used
[INFO] [stdout]   --> src/flow_control.rs:77:16
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub (crate) fn returns() {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `whiles` is never used
[INFO] [stdout]   --> src/flow_control.rs:91:16
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub (crate) fn whiles() {
[INFO] [stdout]    |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fors` is never used
[INFO] [stdout]    --> src/flow_control.rs:112:16
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub (crate) fn fors() {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matchs` is never used
[INFO] [stdout]    --> src/flow_control.rs:170:16
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub (crate) fn matchs() {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iflet` is never used
[INFO] [stdout]    --> src/flow_control.rs:446:16
[INFO] [stdout]     |
[INFO] [stdout] 446 | pub (crate) fn iflet() {
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `letelse` is never used
[INFO] [stdout]    --> src/flow_control.rs:537:16
[INFO] [stdout]     |
[INFO] [stdout] 537 | pub (crate) fn letelse() {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/conversion.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |         2 * x;
[INFO] [stdout]     |         ^^^^^ the arithmetic operation produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 123 |         let _ = 2 * x;
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `too_long_tuple`
[INFO] [stdout]    --> src/primitives.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let too_long_tuple = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_too_long_tuple`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/custom_types.rs:147:9
[INFO] [stdout]     |
[INFO] [stdout] 147 |     let x = Operations::Add;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_string`
[INFO] [stdout]  --> src/conversion.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let my_string = String::from(my_str);
[INFO] [stdout]   |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/flow_control.rs:531:8
[INFO] [stdout]     |
[INFO] [stdout] 531 |     if let FooEx::Bar = a {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout]     = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/flow_control.rs:520:21
[INFO] [stdout]     |
[INFO] [stdout] 520 |     if let Foo::Qux(value @ 100) = c {
[INFO] [stdout]     |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `LANGUAGE` is never used
[INFO] [stdout]   --> src/main.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | static LANGUAGE: &str = "Rust";
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `THRESHOLD` is never used
[INFO] [stdout]   --> src/main.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | const THRESHOLD: i32 = 10;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello` is never used
[INFO] [stdout]  --> src/hello.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) fn hello() {
[INFO] [stdout]   |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_debug` is never used
[INFO] [stdout]   --> src/hello.rs:66:15
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub(crate) fn hello_debug() {
[INFO] [stdout]    |               ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_display` is never used
[INFO] [stdout]    --> src/hello.rs:105:15
[INFO] [stdout]     |
[INFO] [stdout] 105 | pub(crate) fn hello_display() {
[INFO] [stdout]     |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_list` is never used
[INFO] [stdout]    --> src/hello.rs:186:15
[INFO] [stdout]     |
[INFO] [stdout] 186 | pub(crate) fn hello_list() {
[INFO] [stdout]     |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hello_formating` is never used
[INFO] [stdout]    --> src/hello.rs:218:15
[INFO] [stdout]     |
[INFO] [stdout] 218 | pub(crate) fn hello_formating() {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `primitives` is never used
[INFO] [stdout]  --> src/primitives.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub (crate) fn primitives() {
[INFO] [stdout]   |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `primitives_literals` is never used
[INFO] [stdout]   --> src/primitives.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub (crate) fn primitives_literals() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `primitives_tuples` is never used
[INFO] [stdout]   --> src/primitives.rs:65:16
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub (crate) fn primitives_tuples() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `primitives_arrays` is never used
[INFO] [stdout]    --> src/primitives.rs:132:16
[INFO] [stdout]     |
[INFO] [stdout] 132 | pub (crate) fn primitives_arrays() {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `customs_enums` is never used
[INFO] [stdout]   --> src/custom_types.rs:99:16
[INFO] [stdout]    |
[INFO] [stdout] 99 | pub (crate) fn customs_enums() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]    --> src/custom_types.rs:149:12
[INFO] [stdout]     |
[INFO] [stdout] 148 |     impl VeryVerboseEnumOfThingsToDoWithNumbers {
[INFO] [stdout]     |     ------------------------------------------- method in this implementation
[INFO] [stdout] 149 |         fn run(&self, x: i32, y: i32) -> i32 {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `customs_linked_list` is never used
[INFO] [stdout]    --> src/custom_types.rs:217:16
[INFO] [stdout]     |
[INFO] [stdout] 217 | pub (crate) fn customs_linked_list() {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `len`, and `stringify` are never used
[INFO] [stdout]    --> src/custom_types.rs:229:12
[INFO] [stdout]     |
[INFO] [stdout] 227 |     impl List {
[INFO] [stdout]     |     --------- associated items in this implementation
[INFO] [stdout] 228 |         // Create an empty list
[INFO] [stdout] 229 |         fn new() -> List {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 235 |         fn prepend(self, elem: u32) -> List {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 241 |         fn len(&self) -> u32 {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 258 |         fn stringify(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `customs_const` is never used
[INFO] [stdout]    --> src/custom_types.rs:285:16
[INFO] [stdout]     |
[INFO] [stdout] 285 | pub (crate) fn customs_const() {
[INFO] [stdout]     |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variables` is never used
[INFO] [stdout]  --> src/variables.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) fn variables() {
[INFO] [stdout]   |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `types_casting` is never used
[INFO] [stdout]  --> src/types.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub (crate) fn types_casting() {
[INFO] [stdout]   |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `conversion` is never used
[INFO] [stdout]  --> src/conversion.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub (crate) fn conversion() {
[INFO] [stdout]   |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `conversion_try` is never used
[INFO] [stdout]   --> src/conversion.rs:36:16
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub (crate) fn conversion_try() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `conversion_string` is never used
[INFO] [stdout]   --> src/conversion.rs:69:16
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub (crate) fn conversion_string() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `expression` is never used
[INFO] [stdout]    --> src/conversion.rs:110:16
[INFO] [stdout]     |
[INFO] [stdout] 110 | pub (crate) fn expression() {
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ifelse` is never used
[INFO] [stdout]  --> src/flow_control.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub (crate) fn ifelse() {
[INFO] [stdout]   |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loops` is never used
[INFO] [stdout]   --> src/flow_control.rs:30:16
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub (crate) fn loops() {
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `nesting` is never used
[INFO] [stdout]   --> src/flow_control.rs:57:16
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub (crate) fn nesting() {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns` is never used
[INFO] [stdout]   --> src/flow_control.rs:77:16
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub (crate) fn returns() {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `whiles` is never used
[INFO] [stdout]   --> src/flow_control.rs:91:16
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub (crate) fn whiles() {
[INFO] [stdout]    |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fors` is never used
[INFO] [stdout]    --> src/flow_control.rs:112:16
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub (crate) fn fors() {
[INFO] [stdout]     |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matchs` is never used
[INFO] [stdout]    --> src/flow_control.rs:170:16
[INFO] [stdout]     |
[INFO] [stdout] 170 | pub (crate) fn matchs() {
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iflet` is never used
[INFO] [stdout]    --> src/flow_control.rs:446:16
[INFO] [stdout]     |
[INFO] [stdout] 446 | pub (crate) fn iflet() {
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `letelse` is never used
[INFO] [stdout]    --> src/flow_control.rs:537:16
[INFO] [stdout]     |
[INFO] [stdout] 537 | pub (crate) fn letelse() {
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/conversion.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 123 |         2 * x;
[INFO] [stdout]     |         ^^^^^ the arithmetic operation produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 123 |         let _ = 2 * x;
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "00ffab1040cfe7f4721588d17a2eacd8e5524d5c559d405aeed24c975d971685", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00ffab1040cfe7f4721588d17a2eacd8e5524d5c559d405aeed24c975d971685", kill_on_drop: false }`
[INFO] [stdout] 00ffab1040cfe7f4721588d17a2eacd8e5524d5c559d405aeed24c975d971685
