[INFO] cloning repository https://github.com/Chaituvarma-109/rust_sullivan_yt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Chaituvarma-109/rust_sullivan_yt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChaituvarma-109%2Frust_sullivan_yt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChaituvarma-109%2Frust_sullivan_yt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 51fcbe9dc271d9eac2551979256f08a90bfe2f56
[INFO] building Chaituvarma-109/rust_sullivan_yt against master#ad211ced81509462cdfe4c29ed10f97279a0acae for pr-135216
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FChaituvarma-109%2Frust_sullivan_yt" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Chaituvarma-109/rust_sullivan_yt on toolchain ad211ced81509462cdfe4c29ed10f97279a0acae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Chaituvarma-109/rust_sullivan_yt
[INFO] finished tweaking git repo https://github.com/Chaituvarma-109/rust_sullivan_yt
[INFO] tweaked toml for git repo https://github.com/Chaituvarma-109/rust_sullivan_yt written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Chaituvarma-109/rust_sullivan_yt 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" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ee44a4142c565289394a8c9737609b8f8910b00f9c0834c171c47407395cbdb9
[INFO] running `Command { std: "docker" "start" "-a" "ee44a4142c565289394a8c9737609b8f8910b00f9c0834c171c47407395cbdb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee44a4142c565289394a8c9737609b8f8910b00f9c0834c171c47407395cbdb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee44a4142c565289394a8c9737609b8f8910b00f9c0834c171c47407395cbdb9", kill_on_drop: false }`
[INFO] [stdout] ee44a4142c565289394a8c9737609b8f8910b00f9c0834c171c47407395cbdb9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0517e7b1e7af641fae6c6ff48798b5f3b3a9389a4c0dd5b4d6440d5f9eacfe1e
[INFO] running `Command { std: "docker" "start" "-a" "0517e7b1e7af641fae6c6ff48798b5f3b3a9389a4c0dd5b4d6440d5f9eacfe1e", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling iana-time-zone v0.1.60
[INFO] [stderr]    Compiling chrono v0.4.34
[INFO] [stderr]    Compiling rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `spawn`
[INFO] [stdout]  --> mymutex.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::thread::{spawn, scope, sleep};
[INFO] [stdout]   |                   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `opt1` is never read
[INFO] [stdout]  --> optiontest.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut opt1: Option<u8> = None;
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `opt2` is never read
[INFO] [stdout]  --> optiontest.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut opt2: Option<String> = None;
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `chartype` is never read
[INFO] [stdout]   --> optiontest.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut chartype: Option<CharacterType> = None;
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `planet_diff`
[INFO] [stdout]  --> hashset.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let planet_diff = planets_lst.difference(&planet_lst_more);
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_planet_diff`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `planet_symdiff`
[INFO] [stdout]  --> hashset.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let planet_symdiff = planets_lst.symmetric_difference(&planet_lst_more);
[INFO] [stdout]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_planet_symdiff`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `all_foods`
[INFO] [stdout]   --> myiters.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let all_foods: Vec<&&str> = aggregate_foods.clone().collect();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_all_foods`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `x` is assigned to, but never used
[INFO] [stdout]  --> mythreads.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut x = 0u128;
[INFO] [stdout]   |             ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider using `_x` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `iamold` is never read
[INFO] [stdout]    --> main.rs:151:13
[INFO] [stdout]     |
[INFO] [stdout] 151 |     let mut iamold = true;
[INFO] [stdout]     |             ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `first_name` is never read
[INFO] [stdout]    --> main.rs:160:13
[INFO] [stdout]     |
[INFO] [stdout] 160 |     let mut first_name = "Trevor";
[INFO] [stdout]     |             ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `first_name` is never read
[INFO] [stdout]  --> closures.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Person {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 2 |     first_name: String,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Blue`, `Black`, `White`, and `Green` are never constructed
[INFO] [stdout]   --> structs.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | enum VehicleColor {
[INFO] [stdout]    |      ------------ variants in this enum
[INFO] [stdout] 5  |     Silver,
[INFO] [stdout] 6  |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 7  |     Red,
[INFO] [stdout] 8  |     Black,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 9  |     White,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     Green,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `VehicleColor` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `manufacturer`, `model`, and `year` are never read
[INFO] [stdout]   --> structs.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Vehicle {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 18 |     manufacturer: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 19 |     model: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 20 |     year: u16,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Vehicle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `new_vehicle` is never used
[INFO] [stdout]   --> structs.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn new_vehicle() -> Vehicle {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `first_name` is never read
[INFO] [stdout]  --> test_traits.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Person<PetType, PetType2: Animal + Dangerous> where PetType: Animal + NotDangerous {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 2 |     first_name: String,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cat` is never constructed
[INFO] [stdout]   --> test_traits.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Cat {}
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Bear` is never constructed
[INFO] [stdout]   --> test_traits.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | struct Bear {}
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `model` is never read
[INFO] [stdout]   --> basic_vectors.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Car {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] 33 |     manufacturer: String,
[INFO] [stdout] 34 |     model: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Car` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> mychannels.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     rx.recv_timeout(Duration::from_millis(300));
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let _ = rx.recv_timeout(Duration::from_millis(300));
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mychannels.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     thread::spawn(processor_code).join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let _ = thread::spawn(processor_code).join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.35s
[INFO] running `Command { std: "docker" "inspect" "0517e7b1e7af641fae6c6ff48798b5f3b3a9389a4c0dd5b4d6440d5f9eacfe1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0517e7b1e7af641fae6c6ff48798b5f3b3a9389a4c0dd5b4d6440d5f9eacfe1e", kill_on_drop: false }`
[INFO] [stdout] 0517e7b1e7af641fae6c6ff48798b5f3b3a9389a4c0dd5b4d6440d5f9eacfe1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d34205286920a3c80cc8dab4ef1b4eaa4c83de80648879611b87633fcf6ec26
[INFO] running `Command { std: "docker" "start" "-a" "1d34205286920a3c80cc8dab4ef1b4eaa4c83de80648879611b87633fcf6ec26", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `spawn`
[INFO] [stdout]  --> mymutex.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::thread::{spawn, scope, sleep};
[INFO] [stdout]   |                   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `opt1` is never read
[INFO] [stdout]  --> optiontest.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut opt1: Option<u8> = None;
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `opt2` is never read
[INFO] [stdout]  --> optiontest.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut opt2: Option<String> = None;
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `chartype` is never read
[INFO] [stdout]   --> optiontest.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut chartype: Option<CharacterType> = None;
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `planet_diff`
[INFO] [stdout]  --> hashset.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let planet_diff = planets_lst.difference(&planet_lst_more);
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_planet_diff`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `planet_symdiff`
[INFO] [stdout]  --> hashset.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let planet_symdiff = planets_lst.symmetric_difference(&planet_lst_more);
[INFO] [stdout]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_planet_symdiff`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `all_foods`
[INFO] [stdout]   --> myiters.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let all_foods: Vec<&&str> = aggregate_foods.clone().collect();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_all_foods`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `x` is assigned to, but never used
[INFO] [stdout]  --> mythreads.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut x = 0u128;
[INFO] [stdout]   |             ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider using `_x` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `iamold` is never read
[INFO] [stdout]    --> main.rs:151:13
[INFO] [stdout]     |
[INFO] [stdout] 151 |     let mut iamold = true;
[INFO] [stdout]     |             ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `first_name` is never read
[INFO] [stdout]    --> main.rs:160:13
[INFO] [stdout]     |
[INFO] [stdout] 160 |     let mut first_name = "Trevor";
[INFO] [stdout]     |             ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `first_name` is never read
[INFO] [stdout]  --> closures.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Person {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 2 |     first_name: String,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Blue`, `Black`, `White`, and `Green` are never constructed
[INFO] [stdout]   --> structs.rs:6:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | enum VehicleColor {
[INFO] [stdout]    |      ------------ variants in this enum
[INFO] [stdout] 5  |     Silver,
[INFO] [stdout] 6  |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 7  |     Red,
[INFO] [stdout] 8  |     Black,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 9  |     White,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     Green,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `VehicleColor` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `manufacturer`, `model`, and `year` are never read
[INFO] [stdout]   --> structs.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Vehicle {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 18 |     manufacturer: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 19 |     model: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 20 |     year: u16,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Vehicle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `new_vehicle` is never used
[INFO] [stdout]   --> structs.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn new_vehicle() -> Vehicle {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `first_name` is never read
[INFO] [stdout]  --> test_traits.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Person<PetType, PetType2: Animal + Dangerous> where PetType: Animal + NotDangerous {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 2 |     first_name: String,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cat` is never constructed
[INFO] [stdout]   --> test_traits.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Cat {}
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Bear` is never constructed
[INFO] [stdout]   --> test_traits.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | struct Bear {}
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `model` is never read
[INFO] [stdout]   --> basic_vectors.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Car {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] 33 |     manufacturer: String,
[INFO] [stdout] 34 |     model: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Car` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> mychannels.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     rx.recv_timeout(Duration::from_millis(300));
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let _ = rx.recv_timeout(Duration::from_millis(300));
[INFO] [stdout]   |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mychannels.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     thread::spawn(processor_code).join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let _ = thread::spawn(processor_code).join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "1d34205286920a3c80cc8dab4ef1b4eaa4c83de80648879611b87633fcf6ec26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d34205286920a3c80cc8dab4ef1b4eaa4c83de80648879611b87633fcf6ec26", kill_on_drop: false }`
[INFO] [stdout] 1d34205286920a3c80cc8dab4ef1b4eaa4c83de80648879611b87633fcf6ec26
