[INFO] cloning repository https://github.com/alvo254/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alvo254/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falvo254%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falvo254%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e05c8d13fff880636e7d8bded83bd5ce1c884864
[INFO] testing alvo254/learn-rust against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falvo254%2Flearn-rust" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alvo254/learn-rust on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/alvo254/learn-rust
[INFO] finished tweaking git repo https://github.com/alvo254/learn-rust
[INFO] tweaked toml for git repo https://github.com/alvo254/learn-rust written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/alvo254/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b35916ee422f0e7475c77f217fa4f9a2d34b69b9f5181bba0f51d2b43ba3e6a2
[INFO] running `Command { std: "docker" "start" "-a" "b35916ee422f0e7475c77f217fa4f9a2d34b69b9f5181bba0f51d2b43ba3e6a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b35916ee422f0e7475c77f217fa4f9a2d34b69b9f5181bba0f51d2b43ba3e6a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b35916ee422f0e7475c77f217fa4f9a2d34b69b9f5181bba0f51d2b43ba3e6a2", kill_on_drop: false }`
[INFO] [stdout] b35916ee422f0e7475c77f217fa4f9a2d34b69b9f5181bba0f51d2b43ba3e6a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c8591aa789d09cedee50ef48f125b3c8a2768f8770f762c1111396601765a0e7
[INFO] running `Command { std: "docker" "start" "-a" "c8591aa789d09cedee50ef48f125b3c8a2768f8770f762c1111396601765a0e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusted v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/string.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let word = String::new();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `words`
[INFO] [stdout]   --> src/string.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let words = "Inital data".to_string();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_words`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `refer_to_nothing`
[INFO] [stdout]  --> src/dangling_reference.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let refer_to_nothing = no_dangle();
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_refer_to_nothing`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/matching.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let u = catch(Coins::Nickle);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tee`
[INFO] [stdout]   --> src/matching.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let tee = te();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_tee`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/err_ors.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let f = match f{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `rice`
[INFO] [stdout]  --> src/fun.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn rice(x:i64, y:i64) -> i64
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tree`
[INFO] [stdout]  --> src/fun.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn tree(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `stri`
[INFO] [stdout]  --> src/string.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn stri() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `borrow`
[INFO] [stdout]  --> src/borrowing.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn borrow(){
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `change`
[INFO] [stdout]  --> src/borrowing.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn change(some_string: &mut String){
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dang`
[INFO] [stdout]  --> src/dangling_reference.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn dang(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `no_dangle`
[INFO] [stdout]   --> src/dangling_reference.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn no_dangle() -> String {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `user`
[INFO] [stdout]  --> src/struct_s.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn user(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `area`
[INFO] [stdout]   --> src/methods.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn area(&self) -> u32{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/methods.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn can_hold(&self, new: &Rectangle) -> bool{
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `square`
[INFO] [stdout]   --> src/methods.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn square(size: u32) -> Rectangle{
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `method`
[INFO] [stdout]   --> src/methods.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn method(){
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V4`
[INFO] [stdout]   --> src/enums.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     V4(u8,u8,u8,u8),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V6`
[INFO] [stdout]   --> src/enums.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     V6(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `enums_to`
[INFO] [stdout]   --> src/enums.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub fn enums_to(){
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nairobi`
[INFO] [stdout]  --> src/matching.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Nairobi,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Mombasa`
[INFO] [stdout]  --> src/matching.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Mombasa,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nyeri`
[INFO] [stdout]  --> src/matching.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Nyeri
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dim`
[INFO] [stdout]   --> src/matching.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Dim,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quarter`
[INFO] [stdout]   --> src/matching.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Quarter,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hashing`
[INFO] [stdout]  --> src/hashmaps.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn hashing(){
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `error`
[INFO] [stdout]   --> src/err_ors.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn error(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]   --> src/files.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "c8591aa789d09cedee50ef48f125b3c8a2768f8770f762c1111396601765a0e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8591aa789d09cedee50ef48f125b3c8a2768f8770f762c1111396601765a0e7", kill_on_drop: false }`
[INFO] [stdout] c8591aa789d09cedee50ef48f125b3c8a2768f8770f762c1111396601765a0e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 47f49e54c151064ff221ec126ec12d6e1b5ae2a3388ff166fb9db262b92dff0b
[INFO] running `Command { std: "docker" "start" "-a" "47f49e54c151064ff221ec126ec12d6e1b5ae2a3388ff166fb9db262b92dff0b", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusted v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/string.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let word = String::new();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `words`
[INFO] [stdout]   --> src/string.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let words = "Inital data".to_string();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_words`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `refer_to_nothing`
[INFO] [stdout]  --> src/dangling_reference.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let refer_to_nothing = no_dangle();
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_refer_to_nothing`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/matching.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let u = catch(Coins::Nickle);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tee`
[INFO] [stdout]   --> src/matching.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let tee = te();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_tee`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/err_ors.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let f = match f{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `rice`
[INFO] [stdout]  --> src/fun.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn rice(x:i64, y:i64) -> i64
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tree`
[INFO] [stdout]  --> src/fun.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn tree(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `stri`
[INFO] [stdout]  --> src/string.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn stri() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `borrow`
[INFO] [stdout]  --> src/borrowing.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn borrow(){
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `change`
[INFO] [stdout]  --> src/borrowing.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn change(some_string: &mut String){
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dang`
[INFO] [stdout]  --> src/dangling_reference.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn dang(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `no_dangle`
[INFO] [stdout]   --> src/dangling_reference.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn no_dangle() -> String {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `user`
[INFO] [stdout]  --> src/struct_s.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn user(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `area`
[INFO] [stdout]   --> src/methods.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn area(&self) -> u32{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/methods.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn can_hold(&self, new: &Rectangle) -> bool{
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `square`
[INFO] [stdout]   --> src/methods.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn square(size: u32) -> Rectangle{
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `method`
[INFO] [stdout]   --> src/methods.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn method(){
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V4`
[INFO] [stdout]   --> src/enums.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     V4(u8,u8,u8,u8),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V6`
[INFO] [stdout]   --> src/enums.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     V6(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `enums_to`
[INFO] [stdout]   --> src/enums.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub fn enums_to(){
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nairobi`
[INFO] [stdout]  --> src/matching.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Nairobi,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Mombasa`
[INFO] [stdout]  --> src/matching.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Mombasa,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nyeri`
[INFO] [stdout]  --> src/matching.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Nyeri
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dim`
[INFO] [stdout]   --> src/matching.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Dim,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quarter`
[INFO] [stdout]   --> src/matching.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     Quarter,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hashing`
[INFO] [stdout]  --> src/hashmaps.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn hashing(){
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `error`
[INFO] [stdout]   --> src/err_ors.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn error(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]   --> src/files.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "47f49e54c151064ff221ec126ec12d6e1b5ae2a3388ff166fb9db262b92dff0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47f49e54c151064ff221ec126ec12d6e1b5ae2a3388ff166fb9db262b92dff0b", kill_on_drop: false }`
[INFO] [stdout] 47f49e54c151064ff221ec126ec12d6e1b5ae2a3388ff166fb9db262b92dff0b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f8b841b540f233680dcdf885712446f08471e4c4ba04a93d062db3b5ba7ea45e
[INFO] running `Command { std: "docker" "start" "-a" "f8b841b540f233680dcdf885712446f08471e4c4ba04a93d062db3b5ba7ea45e", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]   --> src/string.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let word = String::new();
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `words`
[INFO] [stderr]   --> src/string.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let words = "Inital data".to_string();
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_words`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `refer_to_nothing`
[INFO] [stderr]  --> src/dangling_reference.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let refer_to_nothing = no_dangle();
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_refer_to_nothing`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/matching.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let u = catch(Coins::Nickle);
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tee`
[INFO] [stderr]   --> src/matching.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let tee = te();
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_tee`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/err_ors.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let f = match f{
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `rice`
[INFO] [stderr]  --> src/fun.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn rice(x:i64, y:i64) -> i64
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tree`
[INFO] [stderr]  --> src/fun.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn tree(){
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `stri`
[INFO] [stderr]  --> src/string.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn stri() {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `borrow`
[INFO] [stderr]  --> src/borrowing.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn borrow(){
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `change`
[INFO] [stderr]  --> src/borrowing.rs:5:4
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn change(some_string: &mut String){
[INFO] [stderr]   |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dang`
[INFO] [stderr]  --> src/dangling_reference.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn dang(){
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `no_dangle`
[INFO] [stderr]   --> src/dangling_reference.rs:17:4
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn no_dangle() -> String {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `user`
[INFO] [stderr]  --> src/struct_s.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn user(){
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `area`
[INFO] [stderr]   --> src/methods.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn area(&self) -> u32{
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `can_hold`
[INFO] [stderr]   --> src/methods.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn can_hold(&self, new: &Rectangle) -> bool{
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `square`
[INFO] [stderr]   --> src/methods.rs:25:8
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn square(size: u32) -> Rectangle{
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `method`
[INFO] [stderr]   --> src/methods.rs:30:8
[INFO] [stderr]    |
[INFO] [stderr] 30 | pub fn method(){
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V4`
[INFO] [stderr]   --> src/enums.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     V4(u8,u8,u8,u8),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V6`
[INFO] [stderr]   --> src/enums.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     V6(String),
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enums_to`
[INFO] [stderr]   --> src/enums.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 | pub fn enums_to(){
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nairobi`
[INFO] [stderr]  --> src/matching.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 |     Nairobi,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Mombasa`
[INFO] [stderr]  --> src/matching.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Mombasa,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nyeri`
[INFO] [stderr]  --> src/matching.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Nyeri
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Dim`
[INFO] [stderr]   --> src/matching.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     Dim,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quarter`
[INFO] [stderr]   --> src/matching.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Quarter,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hashing`
[INFO] [stderr]  --> src/hashmaps.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn hashing(){
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `error`
[INFO] [stderr]   --> src/err_ors.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn error(){
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_username_from_file`
[INFO] [stderr]   --> src/files.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rusted` (bin "rusted" test) generated 29 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rusted-bb490ad7c57f3ecb)
[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" "f8b841b540f233680dcdf885712446f08471e4c4ba04a93d062db3b5ba7ea45e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8b841b540f233680dcdf885712446f08471e4c4ba04a93d062db3b5ba7ea45e", kill_on_drop: false }`
[INFO] [stdout] f8b841b540f233680dcdf885712446f08471e4c4ba04a93d062db3b5ba7ea45e