[INFO] cloning repository https://github.com/Jackjackca/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/Jackjackca/learn_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackjackca%2Flearn_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackjackca%2Flearn_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c5a77131e1548a808756596e07420532439b553e
[INFO] testing Jackjackca/learn_rust against try#9f93af291970322f4f1c6315ccde4d7078201159 for pr-146098-6
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackjackca%2Flearn_rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Jackjackca/learn_rust
[INFO] finished tweaking git repo https://github.com/Jackjackca/learn_rust
[INFO] tweaked toml for git repo https://github.com/Jackjackca/learn_rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Jackjackca/learn_rust on toolchain 9f93af291970322f4f1c6315ccde4d7078201159
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Jackjackca/learn_rust 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" "+9f93af291970322f4f1c6315ccde4d7078201159" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9e2c9aaf7c77d39f7d9d9c756e70a1b48cfdec50793d8ba96b210ceff0650cf7
[INFO] running `Command { std: "docker" "start" "-a" "9e2c9aaf7c77d39f7d9d9c756e70a1b48cfdec50793d8ba96b210ceff0650cf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e2c9aaf7c77d39f7d9d9c756e70a1b48cfdec50793d8ba96b210ceff0650cf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e2c9aaf7c77d39f7d9d9c756e70a1b48cfdec50793d8ba96b210ceff0650cf7", kill_on_drop: false }`
[INFO] [stdout] 9e2c9aaf7c77d39f7d9d9c756e70a1b48cfdec50793d8ba96b210ceff0650cf7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4fa4b9c77ec53252944b14e378e0f5809e93d09bf4914a685546ed726ffac559
[INFO] running `Command { std: "docker" "start" "-a" "4fa4b9c77ec53252944b14e378e0f5809e93d09bf4914a685546ed726ffac559", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `compose` and `multiplier`
[INFO] [stdout]   --> src/closure.rs:15:26
[INFO] [stdout]    |
[INFO] [stdout] 15 |     use crate::closure::{compose, multiplier};
[INFO] [stdout]    |                          ^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::_unsafe::linked_list::LinkedList`
[INFO] [stdout]   --> src/_unsafe/linked_list.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     use crate::_unsafe::linked_list::LinkedList;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::multi_thread::static_unsafe_add::add_static`
[INFO] [stdout]   --> src/multi_thread/static_unsafe_add.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     use crate::multi_thread::static_unsafe_add::add_static;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `received`
[INFO] [stdout]   --> src/multi_thread/playground.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let received = rx.recv().unwrap();
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_received`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/multi_thread/static_unsafe_add.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let v = vec_jh.into_iter().for_each(|jh| jh.join().unwrap());
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multiplier` is never used
[INFO] [stdout]  --> src/closure.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn multiplier(factor: i32) -> impl Fn(i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compose` is never used
[INFO] [stdout]  --> src/closure.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn compose<X, Y>(a: X, b: Y, factor: i32) -> i32
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]  --> src/iterator/custom_iterator.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Counter {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/iterator/custom_iterator.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | impl Counter {
[INFO] [stdout]   | ------------ associated function in this implementation
[INFO] [stdout] 5 |     fn new() -> Counter {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `async_fn` is never used
[INFO] [stdout]   --> src/iterator/custom_iterator.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | async fn async_fn() {
[INFO] [stdout]    |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinkedList` is never constructed
[INFO] [stdout]  --> src/_unsafe/linked_list.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct LinkedList {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `some_value`, `is_exist`, and `next_one` are never used
[INFO] [stdout]   --> src/_unsafe/linked_list.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl LinkedList {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn some_value() -> LinkedList {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     fn is_exist(&self, value: u32) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn next_one(&self) -> Option<Self> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `v` should have an upper case name
[INFO] [stdout]  --> src/multi_thread/playground.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     const  v:Vec<i32> = Vec::new();
[INFO] [stdout]   |            ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] help: convert the identifier to upper case (notice the capitalization)
[INFO] [stdout]   |
[INFO] [stdout] 3 -     const  v:Vec<i32> = Vec::new();
[INFO] [stdout] 3 +     const  V:Vec<i32> = Vec::new();
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "4fa4b9c77ec53252944b14e378e0f5809e93d09bf4914a685546ed726ffac559", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fa4b9c77ec53252944b14e378e0f5809e93d09bf4914a685546ed726ffac559", kill_on_drop: false }`
[INFO] [stdout] 4fa4b9c77ec53252944b14e378e0f5809e93d09bf4914a685546ed726ffac559
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e34b31c54972faaae0ae0b74ed6a8d6e4898ed0fe0c6b8f3f2684d789bfbf7e
[INFO] running `Command { std: "docker" "start" "-a" "1e34b31c54972faaae0ae0b74ed6a8d6e4898ed0fe0c6b8f3f2684d789bfbf7e", kill_on_drop: false }`
[INFO] [stdout] warning: unused imports: `compose` and `multiplier`
[INFO] [stdout]   --> src/closure.rs:15:26
[INFO] [stdout]    |
[INFO] [stdout] 15 |     use crate::closure::{compose, multiplier};
[INFO] [stdout]    |                          ^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::_unsafe::linked_list::LinkedList`
[INFO] [stdout]   --> src/_unsafe/linked_list.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     use crate::_unsafe::linked_list::LinkedList;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::multi_thread::static_unsafe_add::add_static`
[INFO] [stdout]   --> src/multi_thread/static_unsafe_add.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     use crate::multi_thread::static_unsafe_add::add_static;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `received`
[INFO] [stdout]   --> src/multi_thread/playground.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let received = rx.recv().unwrap();
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_received`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/multi_thread/static_unsafe_add.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let v = vec_jh.into_iter().for_each(|jh| jh.join().unwrap());
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multiplier` is never used
[INFO] [stdout]  --> src/closure.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn multiplier(factor: i32) -> impl Fn(i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compose` is never used
[INFO] [stdout]  --> src/closure.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn compose<X, Y>(a: X, b: Y, factor: i32) -> i32
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]  --> src/iterator/custom_iterator.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Counter {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/iterator/custom_iterator.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | impl Counter {
[INFO] [stdout]   | ------------ associated function in this implementation
[INFO] [stdout] 5 |     fn new() -> Counter {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `async_fn` is never used
[INFO] [stdout]   --> src/iterator/custom_iterator.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | async fn async_fn() {
[INFO] [stdout]    |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinkedList` is never constructed
[INFO] [stdout]  --> src/_unsafe/linked_list.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct LinkedList {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `some_value`, `is_exist`, and `next_one` are never used
[INFO] [stdout]   --> src/_unsafe/linked_list.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl LinkedList {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn some_value() -> LinkedList {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     fn is_exist(&self, value: u32) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn next_one(&self) -> Option<Self> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `v` should have an upper case name
[INFO] [stdout]  --> src/multi_thread/playground.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     const  v:Vec<i32> = Vec::new();
[INFO] [stdout]   |            ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] help: convert the identifier to upper case (notice the capitalization)
[INFO] [stdout]   |
[INFO] [stdout] 3 -     const  v:Vec<i32> = Vec::new();
[INFO] [stdout] 3 +     const  V:Vec<i32> = Vec::new();
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling learn_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `async_fn`
[INFO] [stdout]   --> src/iterator/custom_iterator.rs:35:53
[INFO] [stdout]    |
[INFO] [stdout] 35 |     use crate::iterator::custom_iterator::{Counter, async_fn};
[INFO] [stdout]    |                                                     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/iterator/custom_iterator.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let mut c = Counter::new();
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `received`
[INFO] [stdout]   --> src/multi_thread/playground.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let received = rx.recv().unwrap();
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_received`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/multi_thread/static_unsafe_add.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let v = vec_jh.into_iter().for_each(|jh| jh.join().unwrap());
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `async_fn` is never used
[INFO] [stdout]   --> src/iterator/custom_iterator.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | async fn async_fn() {
[INFO] [stdout]    |          ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `v` should have an upper case name
[INFO] [stdout]  --> src/multi_thread/playground.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     const  v:Vec<i32> = Vec::new();
[INFO] [stdout]   |            ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] help: convert the identifier to upper case (notice the capitalization)
[INFO] [stdout]   |
[INFO] [stdout] 3 -     const  v:Vec<i32> = Vec::new();
[INFO] [stdout] 3 +     const  V:Vec<i32> = Vec::new();
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "1e34b31c54972faaae0ae0b74ed6a8d6e4898ed0fe0c6b8f3f2684d789bfbf7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e34b31c54972faaae0ae0b74ed6a8d6e4898ed0fe0c6b8f3f2684d789bfbf7e", kill_on_drop: false }`
[INFO] [stdout] 1e34b31c54972faaae0ae0b74ed6a8d6e4898ed0fe0c6b8f3f2684d789bfbf7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+9f93af291970322f4f1c6315ccde4d7078201159" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1deef594a2d2806c674bcb79ec41219ca000ebe27d70f8e7f06b7d43df5dce73
[INFO] running `Command { std: "docker" "start" "-a" "1deef594a2d2806c674bcb79ec41219ca000ebe27d70f8e7f06b7d43df5dce73", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `compose` and `multiplier`
[INFO] [stderr]   --> src/closure.rs:15:26
[INFO] [stderr]    |
[INFO] [stderr] 15 |     use crate::closure::{compose, multiplier};
[INFO] [stderr]    |                          ^^^^^^^  ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::_unsafe::linked_list::LinkedList`
[INFO] [stderr]   --> src/_unsafe/linked_list.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |     use crate::_unsafe::linked_list::LinkedList;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::multi_thread::static_unsafe_add::add_static`
[INFO] [stderr]   --> src/multi_thread/static_unsafe_add.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     use crate::multi_thread::static_unsafe_add::add_static;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `received`
[INFO] [stderr]   --> src/multi_thread/playground.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |         let received = rx.recv().unwrap();
[INFO] [stderr]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_received`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/multi_thread/static_unsafe_add.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let v = vec_jh.into_iter().for_each(|jh| jh.join().unwrap());
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: function `multiplier` is never used
[INFO] [stderr]  --> src/closure.rs:2:4
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn multiplier(factor: i32) -> impl Fn(i32) -> i32 {
[INFO] [stderr]   |    ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `compose` is never used
[INFO] [stderr]  --> src/closure.rs:6:4
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn compose<X, Y>(a: X, b: Y, factor: i32) -> i32
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Counter` is never constructed
[INFO] [stderr]  --> src/iterator/custom_iterator.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Counter {
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]  --> src/iterator/custom_iterator.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | impl Counter {
[INFO] [stderr]   | ------------ associated function in this implementation
[INFO] [stderr] 5 |     fn new() -> Counter {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `async_fn` is never used
[INFO] [stderr]   --> src/iterator/custom_iterator.rs:21:10
[INFO] [stderr]    |
[INFO] [stderr] 21 | async fn async_fn() {
[INFO] [stderr]    |          ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `LinkedList` is never constructed
[INFO] [stderr]  --> src/_unsafe/linked_list.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct LinkedList {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `some_value`, `is_exist`, and `next_one` are never used
[INFO] [stderr]   --> src/_unsafe/linked_list.rs:15:12
[INFO] [stderr]    |
[INFO] [stderr] 14 | impl LinkedList {
[INFO] [stderr]    | --------------- associated items in this implementation
[INFO] [stderr] 15 |     pub fn some_value() -> LinkedList {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 31 |     fn is_exist(&self, value: u32) -> bool {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 35 |     fn next_one(&self) -> Option<Self> {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `v` should have an upper case name
[INFO] [stderr]  --> src/multi_thread/playground.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 |     const  v:Vec<i32> = Vec::new();
[INFO] [stderr]   |            ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_upper_case_globals)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] help: convert the identifier to upper case (notice the capitalization)
[INFO] [stderr]   |
[INFO] [stderr] 3 -     const  v:Vec<i32> = Vec::new();
[INFO] [stderr] 3 +     const  V:Vec<i32> = Vec::new();
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: `learn_rust` (lib) generated 13 warnings (run `cargo fix --lib -p learn_rust` to apply 6 suggestions)
[INFO] [stderr] warning: unused import: `async_fn`
[INFO] [stderr]   --> src/iterator/custom_iterator.rs:35:53
[INFO] [stderr]    |
[INFO] [stderr] 35 |     use crate::iterator::custom_iterator::{Counter, async_fn};
[INFO] [stderr]    |                                                     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/iterator/custom_iterator.rs:50:13
[INFO] [stderr]    |
[INFO] [stderr] 50 |         let mut c = Counter::new();
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `async_fn` is never used
[INFO] [stderr]   --> src/iterator/custom_iterator.rs:21:10
[INFO] [stderr]    |
[INFO] [stderr] 21 | async fn async_fn() {
[INFO] [stderr]    |          ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `learn_rust` (lib test) generated 6 warnings (3 duplicates) (run `cargo fix --lib -p learn_rust --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/learn_rust-837e958d0ea406df)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test _unsafe::linked_list::tests::test_linked_list ... ok
[INFO] [stdout] test closure::tests::test ... ok
[INFO] [stdout] test _unsafe::linked_list::tests::test_iterator ... ok
[INFO] [stdout] test iterator::custom_iterator::tests::test_custom_iterator ... ok
[INFO] [stdout] test closure::tests::test_1 ... ok
[INFO] [stdout] test iterator::custom_iterator::tests::test_iterator_default_implementation ... ok
[INFO] [stdout] test iterator::custom_iterator::tests::test_vec_fu ... ok
[INFO] [stdout] test iterator::tests::it_works ... ok
[INFO] [stdout] test multi_thread::static_unsafe_add::test::test_static_unsafe ... FAILED
[INFO] [stdout] test _unsafe::linked_list::tests::test_is_exist has been running for over 60 seconds
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "1deef594a2d2806c674bcb79ec41219ca000ebe27d70f8e7f06b7d43df5dce73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1deef594a2d2806c674bcb79ec41219ca000ebe27d70f8e7f06b7d43df5dce73", kill_on_drop: false }`
[INFO] [stdout] 1deef594a2d2806c674bcb79ec41219ca000ebe27d70f8e7f06b7d43df5dce73
