[INFO] cloning repository https://github.com/TheLudlows/rust-tour
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TheLudlows/rust-tour" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheLudlows%2Frust-tour", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheLudlows%2Frust-tour'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 928f1cf5d501e8e999d61670938d6d8293de70fc
[INFO] checking TheLudlows/rust-tour against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheLudlows%2Frust-tour" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TheLudlows/rust-tour on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TheLudlows/rust-tour
[INFO] finished tweaking git repo https://github.com/TheLudlows/rust-tour
[INFO] tweaked toml for git repo https://github.com/TheLudlows/rust-tour written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/TheLudlows/rust-tour already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.members
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ee07d3806990cf3935be20d568451bad658afa1c9a0fe2f4c9bb72f5ca859388
[INFO] running `Command { std: "docker" "start" "-a" "ee07d3806990cf3935be20d568451bad658afa1c9a0fe2f4c9bb72f5ca859388", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee07d3806990cf3935be20d568451bad658afa1c9a0fe2f4c9bb72f5ca859388", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee07d3806990cf3935be20d568451bad658afa1c9a0fe2f4c9bb72f5ca859388", kill_on_drop: false }`
[INFO] [stdout] ee07d3806990cf3935be20d568451bad658afa1c9a0fe2f4c9bb72f5ca859388
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa9bb4bfc3652cbf751375f731c54ec562d9e8610df28de539048299851acc19
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "fa9bb4bfc3652cbf751375f731c54ec562d9e8610df28de539048299851acc19", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.members
[INFO] [stderr]    Compiling syn v1.0.36
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]     Checking pin-project v0.4.22
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking rust-tour v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Debug`, `Display`
[INFO] [stdout]  --> src/debug_display.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{Debug, Display, Formatter};
[INFO] [stdout]   |                ^^^^^  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `executor`
[INFO] [stdout]  --> src/asyncs.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures::{self, executor};
[INFO] [stdout]   |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ptr::Unique`
[INFO] [stdout]  --> src/unique.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ptr::Unique;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/error.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `RefCell`, `Ref`
[INFO] [stdout]  --> src/generic.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/closures.rs:12:30
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn returns_closure0() -> Box<Fn(i32) -> i32> {
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BorrowMut`, `Borrow`
[INFO] [stdout]  --> src/boxes.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                   ^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DerefMut`
[INFO] [stdout]  --> src/boxes.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::{Deref, DerefMut};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Nil`, `Node`
[INFO] [stdout]  --> src/boxes.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::boxes::List::{Nil, Node};
[INFO] [stdout]   |                          ^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> src/var.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Borrow`
[INFO] [stdout]  --> src/rc.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/rc.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/thread.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc`, `Barrier`, `Mutex`, `RwLock`, `mpsc`
[INFO] [stdout]  --> src/thread.rs:2:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync::{Arc, Barrier, mpsc, Mutex, RwLock};
[INFO] [stdout]   |                 ^^^  ^^^^^^^  ^^^^  ^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/thread.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/thread.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/flow_control.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 |         1...3 => println!("1...3"),
[INFO] [stdout]    |          ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `empty` should have an upper camel case name
[INFO] [stdout]   --> src/structs.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct empty;
[INFO] [stdout]    |        ^^^^^ help: convert the identifier to upper camel case: `Empty`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `LinkedList`, `VecDeque`
[INFO] [stdout]  --> src/dequeue.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{LinkedList, VecDeque};
[INFO] [stdout]   |                        ^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> src/cell.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::Cell`
[INFO] [stdout]  --> src/cell.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cell::Cell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/option.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::any::Any`
[INFO] [stdout]  --> src/reflect.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::any::Any;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `one` should have an upper camel case name
[INFO] [stdout]  --> src/reflect.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 |     trait one: 'static {}
[INFO] [stdout]   |           ^^^ help: convert the identifier to upper camel case (notice the capitalization): `One`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `type_name_of_val`
[INFO] [stdout]  --> src/any.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::any::{Any, type_name_of_val, TypeId};
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]  --> src/macros.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | / macro_rules! unless {
[INFO] [stdout] 2 | |     ($arg:expr, $branch:expr) => (if !$arg { $branch };);
[INFO] [stdout] 3 | | }
[INFO] [stdout]   | |_^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Debug`, `Display`
[INFO] [stdout]  --> src/debug_display.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{Debug, Display, Formatter};
[INFO] [stdout]   |                ^^^^^  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `RefCell`, `Ref`
[INFO] [stdout]  --> src/generic.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `enum_` should have an upper camel case name
[INFO] [stdout]  --> src/enums.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 |     enum enum_ {
[INFO] [stdout]   |          ^^^^^ help: convert the identifier to upper camel case: `Enum`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `a` should have an upper camel case name
[INFO] [stdout]  --> src/enums.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |         a,
[INFO] [stdout]   |         ^ help: convert the identifier to upper camel case: `A`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `b` should have an upper camel case name
[INFO] [stdout]  --> src/enums.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |         b(String),
[INFO] [stdout]   |         ^ help: convert the identifier to upper camel case: `B`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `s` should have an upper camel case name
[INFO] [stdout]  --> src/enums.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |         s { num: u32, name: String },
[INFO] [stdout]   |         ^ help: convert the identifier to upper camel case (notice the capitalization): `S`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/closures.rs:12:30
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn returns_closure0() -> Box<Fn(i32) -> i32> {
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BorrowMut`
[INFO] [stdout]  --> src/boxes.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DerefMut`
[INFO] [stdout]  --> src/boxes.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::{Deref, DerefMut};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Nil`, `Node`
[INFO] [stdout]  --> src/boxes.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::boxes::List::{Nil, Node};
[INFO] [stdout]   |                          ^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> src/var.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Borrow`
[INFO] [stdout]  --> src/rc.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/rc.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/flow_control.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 |         1...3 => println!("1...3"),
[INFO] [stdout]    |          ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `empty` should have an upper camel case name
[INFO] [stdout]   --> src/structs.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct empty;
[INFO] [stdout]    |        ^^^^^ help: convert the identifier to upper camel case: `Empty`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> src/cell.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/option.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]  --> src/option.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut i = (a.as_mut().unwrap());
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::any::Any`
[INFO] [stdout]  --> src/reflect.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::any::Any;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `one` should have an upper camel case name
[INFO] [stdout]  --> src/reflect.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 |     trait one: 'static {}
[INFO] [stdout]   |           ^^^ help: convert the identifier to upper camel case (notice the capitalization): `One`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BorrowMut`
[INFO] [stdout]  --> src/rc.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/weakref.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vector.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut v = vec![1, 2, 3, 4, 5];
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/var.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut x = 5;
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/var.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut x = "a";
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/sendsync.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut x = vec!["a"];
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `say`
[INFO] [stdout]   --> src/asyncs.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn say() -> impl Future {
[INFO] [stdout]    |    ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `see`
[INFO] [stdout]   --> src/asyncs.rs:22:10
[INFO] [stdout]    |
[INFO] [stdout] 22 | async fn see() {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `lean`
[INFO] [stdout]   --> src/asyncs.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 | async fn lean() {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `exe`
[INFO] [stdout]   --> src/asyncs.rs:30:10
[INFO] [stdout]    |
[INFO] [stdout] 30 | async fn exe() {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `exam`
[INFO] [stdout]   --> src/asyncs.rs:35:10
[INFO] [stdout]    |
[INFO] [stdout] 35 | async fn exam() {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ready`
[INFO] [stdout]   --> src/asyncs.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | async fn ready() {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `all`
[INFO] [stdout]   --> src/asyncs.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 | async fn all() {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print`
[INFO] [stdout]   --> src/unique.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn print(a: *const i32, b: &i32) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add_one`
[INFO] [stdout]  --> src/func.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn add_one(x: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `do_twice`
[INFO] [stdout]  --> src/func.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn do_twice(f: fn(i32) -> i32, arg: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print`
[INFO] [stdout]   --> src/func.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn print(f: &Foo) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `square`
[INFO] [stdout]   --> src/func.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn square<T: Mul<T, Output=T>>(x: T, y: T) -> T {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ya_iif`
[INFO] [stdout]   --> src/func.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn ya_iif(flag: bool) -> &'static str {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `iif`
[INFO] [stdout]   --> src/func.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn iif(flag: bool) -> &'static str {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/vector.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/string.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/hashmap.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `f`
[INFO] [stdout]   --> src/error.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn f(i: i32) -> Result<i32, bool> {
[INFO] [stdout]    |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `g`
[INFO] [stdout]   --> src/error.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn g(i: i32) -> Result<i32, bool> {
[INFO] [stdout]    |    ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Point`
[INFO] [stdout]  --> src/generic.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Point<T> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `x`
[INFO] [stdout]  --> src/generic.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn x(&self) -> &T {
[INFO] [stdout]   |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `distance_from_origin`
[INFO] [stdout]   --> src/generic.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn distance_from_origin(&self) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]   --> src/generic.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     data: i32
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/generic.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/traits.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `fly`
[INFO] [stdout]   --> src/traits.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn fly(&self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `baby_name`
[INFO] [stdout]   --> src/traits.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn baby_name() -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fly_static`
[INFO] [stdout]    --> src/traits.rs:106:4
[INFO] [stdout]     |
[INFO] [stdout] 106 | fn fly_static<T: Fly>(t: &T) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fly_dyn`
[INFO] [stdout]    --> src/traits.rs:110:4
[INFO] [stdout]     |
[INFO] [stdout] 110 | fn fly_dyn(t: &dyn Fly) -> bool {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_closure0`
[INFO] [stdout]   --> src/closures.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn returns_closure0() -> Box<Fn(i32) -> i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_closure1`
[INFO] [stdout]   --> src/closures.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn returns_closure1() -> Box<dyn Fn(i32) -> i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_closure2`
[INFO] [stdout]   --> src/closures.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn returns_closure2() -> Box<impl Fn(i32) -> i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_closure3`
[INFO] [stdout]   --> src/closures.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn returns_closure3() -> impl Fn(i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/iter.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/boxes.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn new(x: T) -> MyBox<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print`
[INFO] [stdout]   --> src/boxes.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn print(name: &str) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `VAR`
[INFO] [stdout]  --> src/var.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | const VAR: u32 = 10;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/var.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]   --> src/var.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn first_word(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_words`
[INFO] [stdout]   --> src/var.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn first_words(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Cons`
[INFO] [stdout]  --> src/rc.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Cons(i32, RefCell<Rc<List>>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nil`
[INFO] [stdout]  --> src/rc.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Nil,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next`
[INFO] [stdout]   --> src/rc.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn next(&self) -> Option<&RefCell<Rc<List>>> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/rc.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/refcell.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn new() -> MyMQ {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/refcell.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Cons`
[INFO] [stdout]  --> src/rcrefcell.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Cons(Rc<RefCell<i32>>, Rc<List>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nil`
[INFO] [stdout]  --> src/rcrefcell.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Nil,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/rcrefcell.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/weakref.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/unsafes.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/flow_control.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `change_arr`
[INFO] [stdout]   --> src/array.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn change_arr(arr: &mut [i32; 2]) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `change_str_arr`
[INFO] [stdout]   --> src/array.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn change_str_arr(arr: &mut [String; 3]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/range.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/str.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/tuple.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]  --> src/structs.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `empty`
[INFO] [stdout]   --> src/structs.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct empty;
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_user`
[INFO] [stdout]   --> src/structs.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn build_user(email: String, username: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/heap.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/sendsync.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_ref`
[INFO] [stdout]  --> src/lifetime.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn print_ref<'a, T>(t: &'a T) where T: 'a + Debug {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print`
[INFO] [stdout]   --> src/lifetime.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn print<T>(t: T) where T: Debug {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/lifetime.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mutate_and_share`
[INFO] [stdout]   --> src/lifetime.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn mutate_and_share(&mut self) -> &mut Self { self }
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `share`
[INFO] [stdout]   --> src/lifetime.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn share(&self) -> &Self {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `do_nothing`
[INFO] [stdout]   --> src/lifetime.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn do_nothing<'a, 'b: 'a>(x: &'a u32, y: &'b u32) -> &'a u32 {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `abs_all`
[INFO] [stdout]  --> src/cow.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn abs_all(input: &mut Cow<[i32]>) {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/cow.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `area`
[INFO] [stdout]  --> src/method.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn area(self) -> u32 {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/method.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from`
[INFO] [stdout]   --> src/method.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn from(width: u32, height: u32) -> Rectangle {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]   --> src/generator.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn test() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/reflect.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_string1`
[INFO] [stdout]  --> src/any.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn is_string1(s: &dyn Any) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_string2`
[INFO] [stdout]  --> src/any.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn is_string2(s: &dyn Any) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_if_string`
[INFO] [stdout]   --> src/any.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn print_if_string(s: &dyn Any) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `modify_if_u32`
[INFO] [stdout]   --> src/any.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn modify_if_u32(s: &mut dyn Any) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 111 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/weakref.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable if-let pattern
[INFO] [stdout]   --> src/enums.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | /     if let x = n {
[INFO] [stdout] 27 | |         println!("{}", x.unwrap())
[INFO] [stdout] 28 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vector.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut v = vec![1, 2, 3, 4, 5];
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/boxes.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let mut a: Box<i32> = Box::new(1);
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/var.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut x = 5;
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/var.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut x = "a";
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/var.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let mut a = "a".to_string();
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let mut s: &[i32] = &a[1..2];
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/structs.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut a = "a";
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/sendsync.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut x = vec!["a"];
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lifetime.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut data = vec![1, 2, 3];
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/cell.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut f = Foo {
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/option.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut i = (a.as_mut().unwrap());
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/ref_test.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut name = String::from("Vivian");
[INFO] [stdout]   |         ----^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/vector.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/string.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/hashmap.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Point`
[INFO] [stdout]  --> src/generic.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Point<T> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `x`
[INFO] [stdout]  --> src/generic.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn x(&self) -> &T {
[INFO] [stdout]   |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `distance_from_origin`
[INFO] [stdout]   --> src/generic.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn distance_from_origin(&self) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]   --> src/generic.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     data: i32
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/generic.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/traits.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `s`
[INFO] [stdout]  --> src/enums.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |         s { num: u32, name: String },
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_closure0`
[INFO] [stdout]   --> src/closures.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn returns_closure0() -> Box<Fn(i32) -> i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_closure1`
[INFO] [stdout]   --> src/closures.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn returns_closure1() -> Box<dyn Fn(i32) -> i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_closure2`
[INFO] [stdout]   --> src/closures.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn returns_closure2() -> Box<impl Fn(i32) -> i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_closure3`
[INFO] [stdout]   --> src/closures.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn returns_closure3() -> impl Fn(i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/iter.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `VAR`
[INFO] [stdout]  --> src/var.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | const VAR: u32 = 10;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/var.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]   --> src/var.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn first_word(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_words`
[INFO] [stdout]   --> src/var.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn first_words(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Cons`
[INFO] [stdout]  --> src/rc.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Cons(i32, RefCell<Rc<List>>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nil`
[INFO] [stdout]  --> src/rc.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Nil,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next`
[INFO] [stdout]   --> src/rc.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn next(&self) -> Option<&RefCell<Rc<List>>> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/rc.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/refcell.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn new() -> MyMQ {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/refcell.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Cons`
[INFO] [stdout]  --> src/rcrefcell.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Cons(Rc<RefCell<i32>>, Rc<List>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nil`
[INFO] [stdout]  --> src/rcrefcell.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Nil,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/rcrefcell.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/weakref.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/unsafes.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/flow_control.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/range.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/str.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/tuple.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sign_in_count`
[INFO] [stdout]  --> src/structs.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     sign_in_count: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `active`
[INFO] [stdout]  --> src/structs.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     active: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/heap.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/sendsync.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_ref`
[INFO] [stdout]  --> src/lifetime.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn print_ref<'a, T>(t: &'a T) where T: 'a + Debug {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print`
[INFO] [stdout]   --> src/lifetime.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn print<T>(t: T) where T: Debug {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/lifetime.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `a`
[INFO] [stdout]  --> src/cell.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |         a: i32,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `abs_all`
[INFO] [stdout]  --> src/cow.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn abs_all(input: &mut Cow<[i32]>) {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/cow.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/method.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]   --> src/generator.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn test() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/reflect.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_string2`
[INFO] [stdout]  --> src/any.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn is_string2(s: &dyn Any) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `x`
[INFO] [stdout]   --> src/any.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         x: u8,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `y`
[INFO] [stdout]   --> src/any.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         y: u8,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: path statement drops value
[INFO] [stdout]   --> src/drop.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     inspector;
[INFO] [stdout]    |     ^^^^^^^^^^ help: use `drop` to clarify the intent: `drop(inspector);`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(path_statements)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_rwLock` should have a snake case name
[INFO] [stdout]    --> src/thread.rs:131:4
[INFO] [stdout]     |
[INFO] [stdout] 131 | fn test_rwLock() {
[INFO] [stdout]     |    ^^^^^^^^^^^ help: convert the identifier to snake case: `test_rw_lock`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/thread.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 157 |     t.join();
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `Local` should have an upper case name
[INFO] [stdout]    --> src/thread.rs:163:26
[INFO] [stdout]     |
[INFO] [stdout] 163 |     thread_local!(static Local:RefCell<i32> = RefCell::new(1));
[INFO] [stdout]     |                          ^^^^^ help: convert the identifier to upper case: `LOCAL`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/thread.rs:168:5
[INFO] [stdout]     |
[INFO] [stdout] 168 | /     thread::spawn(|| {
[INFO] [stdout] 169 | |         Local.with(|v| {
[INFO] [stdout] 170 | |             println!("in sub thread {:?}", v.borrow());
[INFO] [stdout] 171 | |             *v.borrow_mut() = 200;
[INFO] [stdout] 172 | |         });
[INFO] [stdout] 173 | |     }).join();
[INFO] [stdout]     | |______________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/thread.rs:191:5
[INFO] [stdout]     |
[INFO] [stdout] 191 |     join.join();
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 90 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.72s
[INFO] running `Command { std: "docker" "inspect" "fa9bb4bfc3652cbf751375f731c54ec562d9e8610df28de539048299851acc19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa9bb4bfc3652cbf751375f731c54ec562d9e8610df28de539048299851acc19", kill_on_drop: false }`
[INFO] [stdout] fa9bb4bfc3652cbf751375f731c54ec562d9e8610df28de539048299851acc19