[INFO] cloning repository https://github.com/bradleygichuru/singly-linkedlist
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bradleygichuru/singly-linkedlist" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbradleygichuru%2Fsingly-linkedlist", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbradleygichuru%2Fsingly-linkedlist'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c775106727cef1bfc1bcb289c3cc624d21fd0a8d
[INFO] checking bradleygichuru/singly-linkedlist against a5689b034ad287112f709693384a37f1377eb9cc for pr-129249-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbradleygichuru%2Fsingly-linkedlist" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/bradleygichuru/singly-linkedlist
[INFO] finished tweaking git repo https://github.com/bradleygichuru/singly-linkedlist
[INFO] tweaked toml for git repo https://github.com/bradleygichuru/singly-linkedlist written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/bradleygichuru/singly-linkedlist on toolchain a5689b034ad287112f709693384a37f1377eb9cc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/bradleygichuru/singly-linkedlist 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" "+a5689b034ad287112f709693384a37f1377eb9cc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 5e96bc0355ac735d8d95ad66f8fc3821b6087a7d72dc416eeba5fd4417722667
[INFO] running `Command { std: "docker" "start" "5e96bc0355ac735d8d95ad66f8fc3821b6087a7d72dc416eeba5fd4417722667", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e96bc0355ac735d8d95ad66f8fc3821b6087a7d72dc416eeba5fd4417722667", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5e96bc0355ac735d8d95ad66f8fc3821b6087a7d72dc416eeba5fd4417722667" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e96bc0355ac735d8d95ad66f8fc3821b6087a7d72dc416eeba5fd4417722667", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5e96bc0355ac735d8d95ad66f8fc3821b6087a7d72dc416eeba5fd4417722667" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking my-linkedlist-imp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `is_head` is never read
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Node<T> {
[INFO] [stdout]   |        ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 6 |     is_head: bool,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete_node` is never used
[INFO] [stdout]   --> src/main.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T: std::cmp::PartialEq + std::fmt::Debug> SinglyLinkedList<T> {
[INFO] [stdout]    | ------------------------------------------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 68 |     fn delete_node(&mut self, data: T) {//TODO test
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]   --> src/main.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 Box::leak(current_node).into();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 53 -                 Box::leak(current_node).into();
[INFO] [stdout] 53 +                 Box::leak(current_node);
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 53 -                 Box::leak(current_node).into();
[INFO] [stdout] 53 +                 <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]   --> src/main.rs:58:40
[INFO] [stdout]    |
[INFO] [stdout] 58 |                     current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 58 -                     current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 58 +                     current_node_ptr = Box::leak(current_node);
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 58 -                     current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 58 +                     current_node_ptr = <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]   --> src/main.rs:72:68
[INFO] [stdout]    |
[INFO] [stdout] 72 |             let mut prev_node_ptr: &mut Option<NonNull<Node<T>>> = Box::leak(prev_node).into();
[INFO] [stdout]    |                                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 72 -             let mut prev_node_ptr: &mut Option<NonNull<Node<T>>> = Box::leak(prev_node).into();
[INFO] [stdout] 72 +             let mut prev_node_ptr: &mut Option<NonNull<Node<T>>> = Box::leak(prev_node);
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 72 -             let mut prev_node_ptr: &mut Option<NonNull<Node<T>>> = Box::leak(prev_node).into();
[INFO] [stdout] 72 +             let mut prev_node_ptr: &mut Option<NonNull<Node<T>>> = <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(prev_node));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]   --> src/main.rs:74:17
[INFO] [stdout]    |
[INFO] [stdout] 74 |                 Box::leak(current_node).into();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 74 -                 Box::leak(current_node).into();
[INFO] [stdout] 74 +                 Box::leak(current_node);
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 74 -                 Box::leak(current_node).into();
[INFO] [stdout] 74 +                 <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]    --> src/main.rs:101:44
[INFO] [stdout]     |
[INFO] [stdout] 101 |                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 101 -                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 101 +                         current_node_ptr = Box::leak(current_node);
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 101 -                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 101 +                         current_node_ptr = <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]    --> src/main.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 |                 Box::leak(current_node).into();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 115 -                 Box::leak(current_node).into();
[INFO] [stdout] 115 +                 Box::leak(current_node);
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 115 -                 Box::leak(current_node).into();
[INFO] [stdout] 115 +                 <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]    --> src/main.rs:152:44
[INFO] [stdout]     |
[INFO] [stdout] 152 |                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 152 -                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 152 +                         current_node_ptr = Box::leak(current_node);
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 152 -                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 152 +                         current_node_ptr = <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]    --> src/main.rs:168:17
[INFO] [stdout]     |
[INFO] [stdout] 168 |                 Box::leak(current_node).into();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 168 -                 Box::leak(current_node).into();
[INFO] [stdout] 168 +                 Box::leak(current_node);
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 168 -                 Box::leak(current_node).into();
[INFO] [stdout] 168 +                 <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]    --> src/main.rs:199:44
[INFO] [stdout]     |
[INFO] [stdout] 199 |                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 199 -                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 199 +                         current_node_ptr = Box::leak(current_node);
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 199 -                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 199 +                         current_node_ptr = <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `my-linkedlist-imp` (bin "my-linkedlist-imp" test) due to 9 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/main.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SinglyLinkedList` is never constructed
[INFO] [stdout]  --> src/main.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct SinglyLinkedList<T> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert_beginning`, `insert_end`, `delete_node`, `search`, and `traverse` are never used
[INFO] [stdout]    --> src/main.rs:13:8
[INFO] [stdout]     |
[INFO] [stdout]  12 | impl<T: std::cmp::PartialEq + std::fmt::Debug> SinglyLinkedList<T> {
[INFO] [stdout]     | ------------------------------------------------------------------ associated items in this implementation
[INFO] [stdout]  13 |     fn new() -> SinglyLinkedList<T> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout]  16 |     fn insert_beginning(&mut self, data: T) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  40 |     fn insert_end(&mut self, data: T) -> bool { //TODO test
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  68 |     fn delete_node(&mut self, data: T) {//TODO test
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |     fn search(&mut self,data: T) -> Option<i32> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 163 |     fn traverse(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]   --> src/main.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 Box::leak(current_node).into();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 53 -                 Box::leak(current_node).into();
[INFO] [stdout] 53 +                 Box::leak(current_node);
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 53 -                 Box::leak(current_node).into();
[INFO] [stdout] 53 +                 <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]   --> src/main.rs:58:40
[INFO] [stdout]    |
[INFO] [stdout] 58 |                     current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 58 -                     current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 58 +                     current_node_ptr = Box::leak(current_node);
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 58 -                     current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 58 +                     current_node_ptr = <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]   --> src/main.rs:72:68
[INFO] [stdout]    |
[INFO] [stdout] 72 |             let mut prev_node_ptr: &mut Option<NonNull<Node<T>>> = Box::leak(prev_node).into();
[INFO] [stdout]    |                                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 72 -             let mut prev_node_ptr: &mut Option<NonNull<Node<T>>> = Box::leak(prev_node).into();
[INFO] [stdout] 72 +             let mut prev_node_ptr: &mut Option<NonNull<Node<T>>> = Box::leak(prev_node);
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 72 -             let mut prev_node_ptr: &mut Option<NonNull<Node<T>>> = Box::leak(prev_node).into();
[INFO] [stdout] 72 +             let mut prev_node_ptr: &mut Option<NonNull<Node<T>>> = <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(prev_node));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]   --> src/main.rs:74:17
[INFO] [stdout]    |
[INFO] [stdout] 74 |                 Box::leak(current_node).into();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 74 -                 Box::leak(current_node).into();
[INFO] [stdout] 74 +                 Box::leak(current_node);
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 74 -                 Box::leak(current_node).into();
[INFO] [stdout] 74 +                 <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]    --> src/main.rs:101:44
[INFO] [stdout]     |
[INFO] [stdout] 101 |                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 101 -                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 101 +                         current_node_ptr = Box::leak(current_node);
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 101 -                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 101 +                         current_node_ptr = <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]    --> src/main.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 |                 Box::leak(current_node).into();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 115 -                 Box::leak(current_node).into();
[INFO] [stdout] 115 +                 Box::leak(current_node);
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 115 -                 Box::leak(current_node).into();
[INFO] [stdout] 115 +                 <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]    --> src/main.rs:152:44
[INFO] [stdout]     |
[INFO] [stdout] 152 |                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 152 -                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 152 +                         current_node_ptr = Box::leak(current_node);
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 152 -                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 152 +                         current_node_ptr = <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]    --> src/main.rs:168:17
[INFO] [stdout]     |
[INFO] [stdout] 168 |                 Box::leak(current_node).into();
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 168 -                 Box::leak(current_node).into();
[INFO] [stdout] 168 +                 Box::leak(current_node);
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 168 -                 Box::leak(current_node).into();
[INFO] [stdout] 168 +                 <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&mut Option<NonNull<Node<T>>>`
[INFO] [stdout]    --> src/main.rs:199:44
[INFO] [stdout]     |
[INFO] [stdout] 199 |                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 199 -                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 199 +                         current_node_ptr = Box::leak(current_node);
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 199 -                         current_node_ptr = Box::leak(current_node).into();
[INFO] [stdout] 199 +                         current_node_ptr = <&mut Option<NonNull<Node<T>>> as Into<_>>::into(Box::leak(current_node));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `my-linkedlist-imp` (bin "my-linkedlist-imp") due to 9 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "5e96bc0355ac735d8d95ad66f8fc3821b6087a7d72dc416eeba5fd4417722667", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e96bc0355ac735d8d95ad66f8fc3821b6087a7d72dc416eeba5fd4417722667", kill_on_drop: false }`
[INFO] [stdout] 5e96bc0355ac735d8d95ad66f8fc3821b6087a7d72dc416eeba5fd4417722667
