[INFO] cloning repository https://github.com/M-Isonni/learning_Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/M-Isonni/learning_Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FM-Isonni%2Flearning_Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FM-Isonni%2Flearning_Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e5ed7c9e772ff95a1ca633c6a84905ba46300147
[INFO] testing M-Isonni/learning_Rust against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FM-Isonni%2Flearning_Rust" "/workspace/builds/worker-20/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-20/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/M-Isonni/learning_Rust on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/M-Isonni/learning_Rust
[INFO] finished tweaking git repo https://github.com/M-Isonni/learning_Rust
[INFO] tweaked toml for git repo https://github.com/M-Isonni/learning_Rust written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] crate git repo https://github.com/M-Isonni/learning_Rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 88132e6b8d20270114f805fc14788c2ac7a9e1ee11d80d8fb4043d34a5d62b11
[INFO] running `Command { std: "docker" "start" "-a" "88132e6b8d20270114f805fc14788c2ac7a9e1ee11d80d8fb4043d34a5d62b11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "88132e6b8d20270114f805fc14788c2ac7a9e1ee11d80d8fb4043d34a5d62b11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88132e6b8d20270114f805fc14788c2ac7a9e1ee11d80d8fb4043d34a5d62b11", kill_on_drop: false }`
[INFO] [stdout] 88132e6b8d20270114f805fc14788c2ac7a9e1ee11d80d8fb4043d34a5d62b11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7766189a4530f23fb00409245a7fda1862bddaa94a06593d63e2a46e17b615c2
[INFO] running `Command { std: "docker" "start" "-a" "7766189a4530f23fb00409245a7fda1862bddaa94a06593d63e2a46e17b615c2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `count` is assigned to, but never used
[INFO] [stdout]   --> src/matches.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut count = 0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_count` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]   --> src/matches.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         count += 1;
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/panics.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let f = match f{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/panics.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let f = File::open("hello.txt").map_err(|error| {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/panics.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let f = File::open("hello.txt").unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/panics.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/panics.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let res = match res{
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second_result`
[INFO] [stdout]    --> src/panics.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |     let second_result = match second_result{
[INFO] [stdout]     |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `third_result`
[INFO] [stdout]    --> src/panics.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let third_result = match third_result {
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_third_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/panics.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let f = File::open("hello.txt")?;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `both_integer`
[INFO] [stdout]    --> src/generics.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |     let both_integer = Point { x: 5, y: 10 };
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_both_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `integer_and_float`
[INFO] [stdout]    --> src/generics.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |     let integer_and_float = Point { x: 5, y: 4.0 };   
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integer_and_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/traits.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let s = t.clone();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> src/traits.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let r = u.clone();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `address_num`
[INFO] [stdout]   --> src/enums.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     address_num:(u8,u8,u8,u8),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `IPv4` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/enums.rs:28:10
[INFO] [stdout]    |
[INFO] [stdout] 28 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nickel`
[INFO] [stdout]  --> src/matches.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Nickel,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/matches.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dime`
[INFO] [stdout]  --> src/matches.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Dime,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/matches.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]   --> src/matches.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Alabama,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/matches.rs:9:10
[INFO] [stdout]    |
[INFO] [stdout] 9  | #[derive(Debug)] 
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_panic`
[INFO] [stdout]  --> src/panics.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn make_panic(){
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `out_of_index_panic`
[INFO] [stdout]   --> src/panics.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn out_of_index_panic(){
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_map_error`
[INFO] [stdout]   --> src/panics.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn make_map_error(){
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_expect_error`
[INFO] [stdout]   --> src/panics.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn make_expect_error(){
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `general_larget`
[INFO] [stdout]   --> src/generics.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn general_larget<T: PartialOrd + Clone>(list: &[T])->T{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notify`
[INFO] [stdout]   --> src/traits.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn notify(item: impl Summary) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notify_overload`
[INFO] [stdout]   --> src/traits.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn notify_overload<T: Summary>(item1: T, item2: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notify_adding_traits`
[INFO] [stdout]   --> src/traits.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub fn notify_adding_traits<T: Summary + Debug>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `some_function`
[INFO] [stdout]   --> src/traits.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn some_function<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_summarizable`
[INFO] [stdout]   --> src/traits.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Pair`
[INFO] [stdout]   --> src/traits.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/traits.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cmp_display`
[INFO] [stdout]    --> src/traits.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.28s
[INFO] running `Command { std: "docker" "inspect" "7766189a4530f23fb00409245a7fda1862bddaa94a06593d63e2a46e17b615c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7766189a4530f23fb00409245a7fda1862bddaa94a06593d63e2a46e17b615c2", kill_on_drop: false }`
[INFO] [stdout] 7766189a4530f23fb00409245a7fda1862bddaa94a06593d63e2a46e17b615c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d4ca07f111d44c676e778af7c2ee8573f51b269587804a98c5706964d4dd02d
[INFO] running `Command { std: "docker" "start" "-a" "0d4ca07f111d44c676e778af7c2ee8573f51b269587804a98c5706964d4dd02d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `count` is assigned to, but never used
[INFO] [stdout]   --> src/matches.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut count = 0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_count` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]   --> src/matches.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         count += 1;
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/panics.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let f = match f{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/panics.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let f = File::open("hello.txt").map_err(|error| {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/panics.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let f = File::open("hello.txt").unwrap();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/panics.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/panics.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 93 |     let res = match res{
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second_result`
[INFO] [stdout]    --> src/panics.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |     let second_result = match second_result{
[INFO] [stdout]     |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `third_result`
[INFO] [stdout]    --> src/panics.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let third_result = match third_result {
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_third_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/panics.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let f = File::open("hello.txt")?;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `both_integer`
[INFO] [stdout]    --> src/generics.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |     let both_integer = Point { x: 5, y: 10 };
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_both_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `integer_and_float`
[INFO] [stdout]    --> src/generics.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |     let integer_and_float = Point { x: 5, y: 4.0 };   
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integer_and_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/traits.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let s = t.clone();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> src/traits.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let r = u.clone();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `address_num`
[INFO] [stdout]   --> src/enums.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     address_num:(u8,u8,u8,u8),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `IPv4` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/enums.rs:28:10
[INFO] [stdout]    |
[INFO] [stdout] 28 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nickel`
[INFO] [stdout]  --> src/matches.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Nickel,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/matches.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dime`
[INFO] [stdout]  --> src/matches.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Dime,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/matches.rs:1:10
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[derive(Debug)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]   --> src/matches.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Alabama,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/matches.rs:9:10
[INFO] [stdout]    |
[INFO] [stdout] 9  | #[derive(Debug)] 
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_panic`
[INFO] [stdout]  --> src/panics.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn make_panic(){
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `out_of_index_panic`
[INFO] [stdout]   --> src/panics.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn out_of_index_panic(){
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_map_error`
[INFO] [stdout]   --> src/panics.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn make_map_error(){
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_expect_error`
[INFO] [stdout]   --> src/panics.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn make_expect_error(){
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `general_larget`
[INFO] [stdout]   --> src/generics.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn general_larget<T: PartialOrd + Clone>(list: &[T])->T{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notify`
[INFO] [stdout]   --> src/traits.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn notify(item: impl Summary) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notify_overload`
[INFO] [stdout]   --> src/traits.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn notify_overload<T: Summary>(item1: T, item2: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notify_adding_traits`
[INFO] [stdout]   --> src/traits.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub fn notify_adding_traits<T: Summary + Debug>(item: T) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `some_function`
[INFO] [stdout]   --> src/traits.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn some_function<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_summarizable`
[INFO] [stdout]   --> src/traits.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Pair`
[INFO] [stdout]   --> src/traits.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/traits.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cmp_display`
[INFO] [stdout]    --> src/traits.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.84s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/variables-d055e05d11ffcb4c)
[INFO] running `Command { std: "docker" "inspect" "0d4ca07f111d44c676e778af7c2ee8573f51b269587804a98c5706964d4dd02d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d4ca07f111d44c676e778af7c2ee8573f51b269587804a98c5706964d4dd02d", kill_on_drop: false }`
[INFO] [stdout] 0d4ca07f111d44c676e778af7c2ee8573f51b269587804a98c5706964d4dd02d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2969a73e791a10a91fc21e9af54f25998ef7c6c69d69cf148e2d127f1d75f345
[INFO] running `Command { std: "docker" "start" "-a" "2969a73e791a10a91fc21e9af54f25998ef7c6c69d69cf148e2d127f1d75f345", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: variable `count` is assigned to, but never used
[INFO] [stderr]   --> src/matches.rs:69:13
[INFO] [stderr]    |
[INFO] [stderr] 69 |     let mut count = 0;
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: consider using `_count` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `count` is never read
[INFO] [stderr]   --> src/matches.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 |         count += 1;
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/panics.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let f = match f{
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/panics.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let f = File::open("hello.txt").map_err(|error| {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/panics.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let f = File::open("hello.txt").unwrap();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/panics.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/panics.rs:93:9
[INFO] [stderr]    |
[INFO] [stderr] 93 |     let res = match res{
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `second_result`
[INFO] [stderr]    --> src/panics.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |     let second_result = match second_result{
[INFO] [stderr]     |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second_result`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `third_result`
[INFO] [stderr]    --> src/panics.rs:107:9
[INFO] [stderr]     |
[INFO] [stderr] 107 |     let third_result = match third_result {
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_third_result`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]    --> src/panics.rs:114:9
[INFO] [stderr]     |
[INFO] [stderr] 114 |     let f = File::open("hello.txt")?;
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `both_integer`
[INFO] [stderr]    --> src/generics.rs:110:9
[INFO] [stderr]     |
[INFO] [stderr] 110 |     let both_integer = Point { x: 5, y: 10 };
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_both_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `integer_and_float`
[INFO] [stderr]    --> src/generics.rs:113:9
[INFO] [stderr]     |
[INFO] [stderr] 113 |     let integer_and_float = Point { x: 5, y: 4.0 };   
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integer_and_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/traits.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let s = t.clone();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r`
[INFO] [stderr]   --> src/traits.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let r = u.clone();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `address_num`
[INFO] [stderr]   --> src/enums.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     address_num:(u8,u8,u8,u8),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `IPv4` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/enums.rs:28:10
[INFO] [stderr]    |
[INFO] [stderr] 28 | #[derive(Debug)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nickel`
[INFO] [stderr]  --> src/matches.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Nickel,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]  --> src/matches.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[derive(Debug)]
[INFO] [stderr]   |          ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Dime`
[INFO] [stderr]  --> src/matches.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Dime,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]  --> src/matches.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[derive(Debug)]
[INFO] [stderr]   |          ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Alabama`
[INFO] [stderr]   --> src/matches.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     Alabama,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/matches.rs:9:10
[INFO] [stderr]    |
[INFO] [stderr] 9  | #[derive(Debug)] 
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_panic`
[INFO] [stderr]  --> src/panics.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn make_panic(){
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `out_of_index_panic`
[INFO] [stderr]   --> src/panics.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub fn out_of_index_panic(){
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_map_error`
[INFO] [stderr]   --> src/panics.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub fn make_map_error(){
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_expect_error`
[INFO] [stderr]   --> src/panics.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | pub fn make_expect_error(){
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `general_larget`
[INFO] [stderr]   --> src/generics.rs:53:4
[INFO] [stderr]    |
[INFO] [stderr] 53 | fn general_larget<T: PartialOrd + Clone>(list: &[T])->T{
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `notify`
[INFO] [stderr]   --> src/traits.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 | pub fn notify(item: impl Summary) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `notify_overload`
[INFO] [stderr]   --> src/traits.rs:39:8
[INFO] [stderr]    |
[INFO] [stderr] 39 | pub fn notify_overload<T: Summary>(item1: T, item2: T) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `notify_adding_traits`
[INFO] [stderr]   --> src/traits.rs:44:8
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub fn notify_adding_traits<T: Summary + Debug>(item: T) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `some_function`
[INFO] [stderr]   --> src/traits.rs:48:4
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn some_function<T, U>(t: T, u: U) -> i32
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `returns_summarizable`
[INFO] [stderr]   --> src/traits.rs:59:4
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn returns_summarizable() -> impl Summary {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair`
[INFO] [stderr]   --> src/traits.rs:89:8
[INFO] [stderr]    |
[INFO] [stderr] 89 | struct Pair<T> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/traits.rs:95:8
[INFO] [stderr]    |
[INFO] [stderr] 95 |     fn new(x: T, y: T) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `cmp_display`
[INFO] [stderr]    --> src/traits.rs:104:8
[INFO] [stderr]     |
[INFO] [stderr] 104 |     fn cmp_display(&self) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `variables` (bin "variables" test) generated 31 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/variables-d055e05d11ffcb4c)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2969a73e791a10a91fc21e9af54f25998ef7c6c69d69cf148e2d127f1d75f345", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2969a73e791a10a91fc21e9af54f25998ef7c6c69d69cf148e2d127f1d75f345", kill_on_drop: false }`
[INFO] [stdout] 2969a73e791a10a91fc21e9af54f25998ef7c6c69d69cf148e2d127f1d75f345