[INFO] cloning repository https://github.com/wooyulan/rest_study
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wooyulan/rest_study" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwooyulan%2Frest_study", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwooyulan%2Frest_study'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a39cdb4db4c6f0970a216c61e45055a66867d28b
[INFO] checking wooyulan/rest_study against master#85c39893a761fe4c050523278da4e7e45ab42b6e for pr-134688
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwooyulan%2Frest_study" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wooyulan/rest_study on toolchain 85c39893a761fe4c050523278da4e7e45ab42b6e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+85c39893a761fe4c050523278da4e7e45ab42b6e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wooyulan/rest_study
[INFO] finished tweaking git repo https://github.com/wooyulan/rest_study
[INFO] tweaked toml for git repo https://github.com/wooyulan/rest_study written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/wooyulan/rest_study 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" "+85c39893a761fe4c050523278da4e7e45ab42b6e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded utf8_slice v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+85c39893a761fe4c050523278da4e7e45ab42b6e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c74c7f62266f2222b65769bde8e2f33fece412495af774f8c721521131546437
[INFO] running `Command { std: "docker" "start" "-a" "c74c7f62266f2222b65769bde8e2f33fece412495af774f8c721521131546437", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c74c7f62266f2222b65769bde8e2f33fece412495af774f8c721521131546437", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c74c7f62266f2222b65769bde8e2f33fece412495af774f8c721521131546437", kill_on_drop: false }`
[INFO] [stdout] c74c7f62266f2222b65769bde8e2f33fece412495af774f8c721521131546437
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+85c39893a761fe4c050523278da4e7e45ab42b6e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e21bf4068f3844033e32c0ca6c8d9b59171cee7ed9ebf5628af3972e8d76eedb
[INFO] running `Command { std: "docker" "start" "-a" "e21bf4068f3844033e32c0ca6c8d9b59171cee7ed9ebf5628af3972e8d76eedb", kill_on_drop: false }`
[INFO] [stderr]     Checking utf8_slice v1.0.0
[INFO] [stderr]     Checking rust_study v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]   --> src/complex/str_slice.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let len = s.len();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/matches/t_match.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let six = plus_one(five);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]    --> src/matches/t_match.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |     let none = plus_one(None);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/generics/traits.rs:85:42
[INFO] [stdout]    |
[INFO] [stdout] 85 | pub fn notify_more<T: Summary + Display>(item: &T){
[INFO] [stdout]    |                                          ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/generics/traits.rs:90:23
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn some_function<T,U>(t:&T,u:&U) -> i32
[INFO] [stdout]    |                       ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/generics/traits.rs:90:28
[INFO] [stdout]    |
[INFO] [stdout] 90 | fn some_function<T,U>(t:&T,u:&U) -> i32
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_str_slice` is never used
[INFO] [stdout]  --> src/complex/str_slice.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn test_str_slice() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greet` is never used
[INFO] [stdout]   --> src/complex/str_slice.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn greet(name: String) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greet_addr` is never used
[INFO] [stdout]   --> src/complex/str_slice.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn greet_addr(name: &String) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_slice` is never used
[INFO] [stdout]   --> src/complex/str_slice.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn test_slice() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_slice_utf_8` is never used
[INFO] [stdout]   --> src/complex/str_slice.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn test_slice_utf_8() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_str_2_addr` is never used
[INFO] [stdout]   --> src/complex/str_slice.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn test_str_2_addr() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_addr_2_str` is never used
[INFO] [stdout]   --> src/complex/str_slice.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn test_addr_2_str() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_str_operator` is never used
[INFO] [stdout]   --> src/complex/str_slice.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn test_str_operator() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_tuple` is never used
[INFO] [stdout]  --> src/complex/tuple.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_tuple(){
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_init` is never used
[INFO] [stdout]  --> src/complex/tuple.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn test_init(){
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_struct` is never used
[INFO] [stdout]  --> src/complex/t_struct.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_struct() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/complex/t_struct.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_struct` is never used
[INFO] [stdout]   --> src/complex/t_struct.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn create_struct() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> src/complex/t_struct.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn build_user(email:String,username:String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]   --> src/complex/t_struct.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | struct Color(i32,i32,i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_tuple_struct` is never used
[INFO] [stdout]   --> src/complex/t_struct.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn create_tuple_struct(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_enum` is never used
[INFO] [stdout]  --> src/complex/t_enum.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_enum() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PokerSuit` is never used
[INFO] [stdout]  --> src/complex/t_enum.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum PokerSuit {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PokerCard` is never used
[INFO] [stdout]   --> src/complex/t_enum.rs:14:6
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum PokerCard {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_enum` is never used
[INFO] [stdout]   --> src/complex/t_enum.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn create_enum() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_enum` is never used
[INFO] [stdout]   --> src/complex/t_enum.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn print_enum(card: PokerSuit) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_enum_card` is never used
[INFO] [stdout]   --> src/complex/t_enum.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn print_enum_card(card: PokerCard) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_array` is never used
[INFO] [stdout]  --> src/complex/t_array.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_array(){
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `init_basic_array` is never used
[INFO] [stdout]  --> src/complex/t_array.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn init_basic_array(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `init_no_basic_array` is never used
[INFO] [stdout]   --> src/complex/t_array.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn init_no_basic_array(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `array_slice` is never used
[INFO] [stdout]   --> src/complex/t_array.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn array_slice(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_process_control` is never used
[INFO] [stdout]  --> src/process_control/t_pro_ctrl.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_process_control(){
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_if` is never used
[INFO] [stdout]  --> src/process_control/t_pro_ctrl.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn test_if(){
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_for` is never used
[INFO] [stdout]   --> src/process_control/t_pro_ctrl.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn test_for(){
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_for_index` is never used
[INFO] [stdout]   --> src/process_control/t_pro_ctrl.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn test_for_index(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_match` is never used
[INFO] [stdout]  --> src/matches/t_match.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_match() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Direction` is never used
[INFO] [stdout]   --> src/matches/t_match.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum Direction {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example` is never used
[INFO] [stdout]   --> src/matches/t_match.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn example() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddr` is never used
[INFO] [stdout]   --> src/matches/t_match.rs:30:6
[INFO] [stdout]    |
[INFO] [stdout] 30 | enum IpAddr {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_match_value` is never used
[INFO] [stdout]   --> src/matches/t_match.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn test_match_value() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UsState` is never used
[INFO] [stdout]   --> src/matches/t_match.rs:47:6
[INFO] [stdout]    |
[INFO] [stdout] 47 | enum UsState {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]   --> src/matches/t_match.rs:53:6
[INFO] [stdout]    |
[INFO] [stdout] 53 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]   --> src/matches/t_match.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn value_in_cents(coin: Coin) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_match_bind` is never used
[INFO] [stdout]   --> src/matches/t_match.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn test_match_bind() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MyEnum` is never used
[INFO] [stdout]   --> src/matches/t_match.rs:88:6
[INFO] [stdout]    |
[INFO] [stdout] 88 | enum MyEnum {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_matches` is never used
[INFO] [stdout]   --> src/matches/t_match.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn test_matches() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]    --> src/matches/t_match.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_while_let` is never used
[INFO] [stdout]    --> src/matches/t_match.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn test_while_let() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_name_var` is never used
[INFO] [stdout]    --> src/matches/t_match.rs:136:4
[INFO] [stdout]     |
[INFO] [stdout] 136 | fn match_name_var(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_method` is never used
[INFO] [stdout]  --> src/method/method.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_method(){
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/method/method.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `area`, `width_1`, `new`, and `width` are never used
[INFO] [stdout]   --> src/method/method.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Rectangle {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 17 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     fn width_1(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     pub fn new(width:u32,height:u32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub fn width(&self) ->u32 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_rectangle` is never used
[INFO] [stdout]   --> src/method/method.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn test_rectangle(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_gennerics` is never used
[INFO] [stdout]  --> src/generics/gennerics.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_gennerics() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `testLargeT` is never used
[INFO] [stdout]  --> src/generics/gennerics.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn testLargeT<T:PartialOrd>(list: &[T])  -> &T {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]   --> src/complex/str_slice.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let len = s.len();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/generics/gennerics.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn test(){
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_study` (lib test); 57 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/85c39893a761fe4c050523278da4e7e45ab42b6e/bin/rustc --crate-name rust_study --edition=2021 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=defbd25b1a8bd573 -C extra-filename=-fdd4d4955b8e63e4 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern utf8_slice=/opt/rustwide/target/debug/deps/libutf8_slice-08253a6ecf8af2c5.rmeta --cap-lints=forbid` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `rust_study` (lib); 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/85c39893a761fe4c050523278da4e7e45ab42b6e/bin/rustc --crate-name rust_study --edition=2021 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=2f2e3913b4004844 -C extra-filename=-d283a0e850b53790 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern utf8_slice=/opt/rustwide/target/debug/deps/libutf8_slice-08253a6ecf8af2c5.rmeta --cap-lints=forbid` (exit status: 0)
[INFO] running `Command { std: "docker" "inspect" "e21bf4068f3844033e32c0ca6c8d9b59171cee7ed9ebf5628af3972e8d76eedb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e21bf4068f3844033e32c0ca6c8d9b59171cee7ed9ebf5628af3972e8d76eedb", kill_on_drop: false }`
[INFO] [stdout] e21bf4068f3844033e32c0ca6c8d9b59171cee7ed9ebf5628af3972e8d76eedb