[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 master#2fd6efc32704647e64d3d646d21c4c68eae100e4 for pr-149852-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJackjackca%2Flearn_rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/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-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Jackjackca/learn_rust on toolchain 2fd6efc32704647e64d3d646d21c4c68eae100e4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "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" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd94e769330fcd8045dabc6bde8342cab7254b50a758a86ecefcc5eb693e57e3
[INFO] running `Command { std: "docker" "start" "-a" "fd94e769330fcd8045dabc6bde8342cab7254b50a758a86ecefcc5eb693e57e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd94e769330fcd8045dabc6bde8342cab7254b50a758a86ecefcc5eb693e57e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd94e769330fcd8045dabc6bde8342cab7254b50a758a86ecefcc5eb693e57e3", kill_on_drop: false }`
[INFO] [stdout] fd94e769330fcd8045dabc6bde8342cab7254b50a758a86ecefcc5eb693e57e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ba38ea5f1b2c99ad6ff8cb8ca2499d370900da0db83a2ea0e6c47e64f418eca
[INFO] running `Command { std: "docker" "start" "-a" "8ba38ea5f1b2c99ad6ff8cb8ca2499d370900da0db83a2ea0e6c47e64f418eca", 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 1.11s
[INFO] running `Command { std: "docker" "inspect" "8ba38ea5f1b2c99ad6ff8cb8ca2499d370900da0db83a2ea0e6c47e64f418eca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ba38ea5f1b2c99ad6ff8cb8ca2499d370900da0db83a2ea0e6c47e64f418eca", kill_on_drop: false }`
[INFO] [stdout] 8ba38ea5f1b2c99ad6ff8cb8ca2499d370900da0db83a2ea0e6c47e64f418eca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 11bf0d4604e9b067f14e0044b754c34f42ec681958a77f30e2d0bb937781013e
[INFO] running `Command { std: "docker" "start" "-a" "11bf0d4604e9b067f14e0044b754c34f42ec681958a77f30e2d0bb937781013e", 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] [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 0.65s
[INFO] running `Command { std: "docker" "inspect" "11bf0d4604e9b067f14e0044b754c34f42ec681958a77f30e2d0bb937781013e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11bf0d4604e9b067f14e0044b754c34f42ec681958a77f30e2d0bb937781013e", kill_on_drop: false }`
[INFO] [stdout] 11bf0d4604e9b067f14e0044b754c34f42ec681958a77f30e2d0bb937781013e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1f3e37002dfea4a42565ed0575552cf9c32f0354cb3432ea382bc4e00f72c266
[INFO] running `Command { std: "docker" "start" "-a" "1f3e37002dfea4a42565ed0575552cf9c32f0354cb3432ea382bc4e00f72c266", 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 0.05s
[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_iterator ... ok
[INFO] [stdout] test _unsafe::linked_list::tests::test_linked_list ... ok
[INFO] [stdout] test closure::tests::test ... ok
[INFO] [stdout] test iterator::custom_iterator::tests::test_custom_iterator ... ok
[INFO] [stdout] test iterator::custom_iterator::tests::test_vec_fu ... ok
[INFO] [stdout] test closure::tests::test_1 ... ok
[INFO] [stdout] test iterator::tests::it_works ... ok
[INFO] [stdout] test iterator::custom_iterator::tests::test_iterator_default_implementation ... 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" "1f3e37002dfea4a42565ed0575552cf9c32f0354cb3432ea382bc4e00f72c266", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f3e37002dfea4a42565ed0575552cf9c32f0354cb3432ea382bc4e00f72c266", kill_on_drop: false }`
[INFO] [stdout] 1f3e37002dfea4a42565ed0575552cf9c32f0354cb3432ea382bc4e00f72c266
