[INFO] fetching crate evillatoro-data-structures 0.1.0...
[INFO] linting evillatoro-data-structures-0.1.0 against nightly for clippy-nonminimal_bool-denied
[INFO] extracting crate evillatoro-data-structures 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate evillatoro-data-structures 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate evillatoro-data-structures 0.1.0
[INFO] tweaked toml for crates.io crate evillatoro-data-structures 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate evillatoro-data-structures 0.1.0 on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b443e474fad50c42a274e4ca0ddbdc763588316f84665493a152b593cbde7a9c
[INFO] running `Command { std: "docker" "start" "-a" "b443e474fad50c42a274e4ca0ddbdc763588316f84665493a152b593cbde7a9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b443e474fad50c42a274e4ca0ddbdc763588316f84665493a152b593cbde7a9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b443e474fad50c42a274e4ca0ddbdc763588316f84665493a152b593cbde7a9c", kill_on_drop: false }`
[INFO] [stdout] b443e474fad50c42a274e4ca0ddbdc763588316f84665493a152b593cbde7a9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f2386fe626a7b083b2b7ca0da19f6314f001ae35d054acceb82306c23763ed5
[INFO] running `Command { std: "docker" "start" "-a" "7f2386fe626a7b083b2b7ca0da19f6314f001ae35d054acceb82306c23763ed5", kill_on_drop: false }`
[INFO] [stderr]     Checking evillatoro-data-structures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `next` is never read
[INFO] [stdout]   --> src/doubly_linked_list.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub struct ListNode<T> {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 65 |     next: Option<Box<ListNode<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: implementation of inherent method `to_string(&self) -> String` for type `linked_list::ListNode<T>`
[INFO] [stdout]   --> src/linked_list.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     fn to_string(&self) -> String {
[INFO] [stdout] 21 | |         format!("[{}]", self.data)
[INFO] [stdout] 22 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: implement trait `Display` for type `linked_list::ListNode<T>` instead
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inherent_to_string
[INFO] [stdout]    = note: `#[warn(clippy::inherent_to_string)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/linked_list.rs:36:11
[INFO] [stdout]    |
[INFO] [stdout] 36 |     print(&head);
[INFO] [stdout]    |           ^^^^^ help: change this to: `head`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/linked_list.rs:37:55
[INFO] [stdout]    |
[INFO] [stdout] 37 |     println!("Linked list length {len}", len = length(&head));
[INFO] [stdout]    |                                                       ^^^^^ help: change this to: `head`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/linked_list.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             return new_node;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 60 -             return new_node;
[INFO] [stdout] 60 +             new_node
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/linked_list.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |             return head.unwrap();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 76 -             return head.unwrap();
[INFO] [stdout] 76 +             head.unwrap()
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/linked_list.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 107 |     return head.expect("head node must exist to insert at position");
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 107 -     return head.expect("head node must exist to insert at position");
[INFO] [stdout] 107 +     head.expect("head node must exist to insert at position")
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:104:20
[INFO] [stdout]     |
[INFO] [stdout] 104 |         cur = &mut (*node).next;
[INFO] [stdout]     |                    ^^^^^^^ help: try: `node`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout]     = note: `#[warn(clippy::explicit_auto_deref)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/linked_list.rs:113:29
[INFO] [stdout]     |
[INFO] [stdout] 113 |         Some(first_node) => return first_node.next,
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 113 -         Some(first_node) => return first_node.next,
[INFO] [stdout] 113 +         Some(first_node) => first_node.next,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/linked_list.rs:139:13
[INFO] [stdout]     |
[INFO] [stdout] 139 |             return None;
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 139 -             return None;
[INFO] [stdout] 139 +             None
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:124:47
[INFO] [stdout]     |
[INFO] [stdout] 124 |             while let Some(ref mut current) = (*cur).next {
[INFO] [stdout]     |                                               ^^^^^^ help: try: `cur`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:132:25
[INFO] [stdout]     |
[INFO] [stdout] 132 |                         (*current).next = None;
[INFO] [stdout]     |                         ^^^^^^^^^^ help: try: `current`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/linked_list.rs:179:13
[INFO] [stdout]     |
[INFO] [stdout] 179 |             return head;
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 179 -             return head;
[INFO] [stdout] 179 +             head
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:159:47
[INFO] [stdout]     |
[INFO] [stdout] 159 |             while let Some(ref mut current) = (*cur).next {
[INFO] [stdout]     |                                               ^^^^^^ help: try: `cur`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:168:43
[INFO] [stdout]     |
[INFO] [stdout] 168 |                         (*current).next = (*next).next.take();
[INFO] [stdout]     |                                           ^^^^^^^ help: try: `next`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:168:25
[INFO] [stdout]     |
[INFO] [stdout] 168 |                         (*current).next = (*next).next.take();
[INFO] [stdout]     |                         ^^^^^^^^^^ help: try: `current`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `DoublyLinkedList<T>`
[INFO] [stdout]   --> src/doubly_linked_list.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | /     pub fn new() -> DoublyLinkedList<T> {
[INFO] [stdout] 17 | |         DoublyLinkedList {
[INFO] [stdout] 18 | |             head: None,
[INFO] [stdout] 19 | |             length: 0,
[INFO] [stdout] 20 | |         }
[INFO] [stdout] 21 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout]    = note: `#[warn(clippy::new_without_default)]` on by default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout]  6 + impl<T> Default for DoublyLinkedList<T> {
[INFO] [stdout]  7 +     fn default() -> Self {
[INFO] [stdout]  8 +         Self::new()
[INFO] [stdout]  9 +     }
[INFO] [stdout] 10 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `next` is never read
[INFO] [stdout]   --> src/doubly_linked_list.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub struct ListNode<T> {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 65 |     next: Option<Box<ListNode<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: function `test_with_value` is never used
[INFO] [stdout]   --> src/doubly_linked_list.rs:87:12
[INFO] [stdout]    |
[INFO] [stdout] 87 |         fn test_with_value() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: implementation of inherent method `to_string(&self) -> String` for type `linked_list::ListNode<T>`
[INFO] [stdout]   --> src/linked_list.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     fn to_string(&self) -> String {
[INFO] [stdout] 21 | |         format!("[{}]", self.data)
[INFO] [stdout] 22 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: implement trait `Display` for type `linked_list::ListNode<T>` instead
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inherent_to_string
[INFO] [stdout]    = note: `#[warn(clippy::inherent_to_string)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/linked_list.rs:36:11
[INFO] [stdout]    |
[INFO] [stdout] 36 |     print(&head);
[INFO] [stdout]    |           ^^^^^ help: change this to: `head`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/linked_list.rs:37:55
[INFO] [stdout]    |
[INFO] [stdout] 37 |     println!("Linked list length {len}", len = length(&head));
[INFO] [stdout]    |                                                       ^^^^^ help: change this to: `head`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/linked_list.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |             return new_node;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 60 -             return new_node;
[INFO] [stdout] 60 +             new_node
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/linked_list.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |             return head.unwrap();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 76 -             return head.unwrap();
[INFO] [stdout] 76 +             head.unwrap()
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/linked_list.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 107 |     return head.expect("head node must exist to insert at position");
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 107 -     return head.expect("head node must exist to insert at position");
[INFO] [stdout] 107 +     head.expect("head node must exist to insert at position")
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:104:20
[INFO] [stdout]     |
[INFO] [stdout] 104 |         cur = &mut (*node).next;
[INFO] [stdout]     |                    ^^^^^^^ help: try: `node`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout]     = note: `#[warn(clippy::explicit_auto_deref)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/linked_list.rs:113:29
[INFO] [stdout]     |
[INFO] [stdout] 113 |         Some(first_node) => return first_node.next,
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 113 -         Some(first_node) => return first_node.next,
[INFO] [stdout] 113 +         Some(first_node) => first_node.next,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/linked_list.rs:139:13
[INFO] [stdout]     |
[INFO] [stdout] 139 |             return None;
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 139 -             return None;
[INFO] [stdout] 139 +             None
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:124:47
[INFO] [stdout]     |
[INFO] [stdout] 124 |             while let Some(ref mut current) = (*cur).next {
[INFO] [stdout]     |                                               ^^^^^^ help: try: `cur`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:132:25
[INFO] [stdout]     |
[INFO] [stdout] 132 |                         (*current).next = None;
[INFO] [stdout]     |                         ^^^^^^^^^^ help: try: `current`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/linked_list.rs:179:13
[INFO] [stdout]     |
[INFO] [stdout] 179 |             return head;
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 179 -             return head;
[INFO] [stdout] 179 +             head
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:159:47
[INFO] [stdout]     |
[INFO] [stdout] 159 |             while let Some(ref mut current) = (*cur).next {
[INFO] [stdout]     |                                               ^^^^^^ help: try: `cur`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:168:43
[INFO] [stdout]     |
[INFO] [stdout] 168 |                         (*current).next = (*next).next.take();
[INFO] [stdout]     |                                           ^^^^^^^ help: try: `next`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:168:25
[INFO] [stdout]     |
[INFO] [stdout] 168 |                         (*current).next = (*next).next.take();
[INFO] [stdout]     |                         ^^^^^^^^^^ help: try: `current`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:225:20
[INFO] [stdout]     |
[INFO] [stdout] 225 |         assert_eq!((*head).data, 1);
[INFO] [stdout]     |                    ^^^^^^^ help: try: `head`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:226:17
[INFO] [stdout]     |
[INFO] [stdout] 226 |         assert!((*head).next.is_none());
[INFO] [stdout]     |                 ^^^^^^^ help: try: `head`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/linked_list.rs:233:17
[INFO] [stdout]     |
[INFO] [stdout] 233 |         assert!(!(*head).next.is_some());
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `(*head).next.is_none()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:232:20
[INFO] [stdout]     |
[INFO] [stdout] 232 |         assert_ne!((*head).data, 10);
[INFO] [stdout]     |                    ^^^^^^^ help: try: `head`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:233:18
[INFO] [stdout]     |
[INFO] [stdout] 233 |         assert!(!(*head).next.is_some());
[INFO] [stdout]     |                  ^^^^^^^ help: try: `head`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:241:20
[INFO] [stdout]     |
[INFO] [stdout] 241 |         assert_eq!((*head).data, 1);
[INFO] [stdout]     |                    ^^^^^^^ help: try: `head`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:243:17
[INFO] [stdout]     |
[INFO] [stdout] 243 |         assert!((*head).next.is_some());
[INFO] [stdout]     |                 ^^^^^^^ help: try: `head`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:254:20
[INFO] [stdout]     |
[INFO] [stdout] 254 |         assert_eq!((*head).data, 1);
[INFO] [stdout]     |                    ^^^^^^^ help: try: `head`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:255:17
[INFO] [stdout]     |
[INFO] [stdout] 255 |         assert!((*head).next.is_none());
[INFO] [stdout]     |                 ^^^^^^^ help: try: `head`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:258:20
[INFO] [stdout]     |
[INFO] [stdout] 258 |         assert_eq!((*head).data, 1);
[INFO] [stdout]     |                    ^^^^^^^ help: try: `head`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:259:17
[INFO] [stdout]     |
[INFO] [stdout] 259 |         assert!((*head).next.is_some());
[INFO] [stdout]     |                 ^^^^^^^ help: try: `head`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:265:20
[INFO] [stdout]     |
[INFO] [stdout] 265 |         assert_eq!((*head).data, 1);
[INFO] [stdout]     |                    ^^^^^^^ help: try: `head`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:266:17
[INFO] [stdout]     |
[INFO] [stdout] 266 |         assert!((*head).next.is_none());
[INFO] [stdout]     |                 ^^^^^^^ help: try: `head`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/linked_list.rs:283:23
[INFO] [stdout]     |
[INFO] [stdout] 283 |                 cur = &node;
[INFO] [stdout]     |                       ^^^^^ help: change this to: `node`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:289:20
[INFO] [stdout]     |
[INFO] [stdout] 289 |         assert_eq!((*cur).data, value);
[INFO] [stdout]     |                    ^^^^^^ help: try: `cur`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:342:36
[INFO] [stdout]     |
[INFO] [stdout] 342 |         while let Some(ref node) = (*cur).next {
[INFO] [stdout]     |                                    ^^^^^^ help: try: `cur`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:347:23
[INFO] [stdout]     |
[INFO] [stdout] 347 |         assert_eq!(1, (*cur).data);
[INFO] [stdout]     |                       ^^^^^^ help: try: `cur`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/linked_list.rs:377:36
[INFO] [stdout]     |
[INFO] [stdout] 377 |                     original_cur = &node;
[INFO] [stdout]     |                                    ^^^^^ help: change this to: `node`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:381:29
[INFO] [stdout]     |
[INFO] [stdout] 381 |             original_data = (*original_cur).data;
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^ help: try: `original_cur`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/linked_list.rs:391:23
[INFO] [stdout]     |
[INFO] [stdout] 391 |                 cur = &node;
[INFO] [stdout]     |                       ^^^^^ help: change this to: `node`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/linked_list.rs:395:35
[INFO] [stdout]     |
[INFO] [stdout] 395 |         assert_ne!(original_data, (*cur).data);
[INFO] [stdout]     |                                   ^^^^^^ help: try: `cur`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `DoublyLinkedList<T>`
[INFO] [stdout]   --> src/doubly_linked_list.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | /     pub fn new() -> DoublyLinkedList<T> {
[INFO] [stdout] 17 | |         DoublyLinkedList {
[INFO] [stdout] 18 | |             head: None,
[INFO] [stdout] 19 | |             length: 0,
[INFO] [stdout] 20 | |         }
[INFO] [stdout] 21 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout]    = note: `#[warn(clippy::new_without_default)]` on by default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout]  6 + impl<T> Default for DoublyLinkedList<T> {
[INFO] [stdout]  7 +     fn default() -> Self {
[INFO] [stdout]  8 +         Self::new()
[INFO] [stdout]  9 +     }
[INFO] [stdout] 10 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "7f2386fe626a7b083b2b7ca0da19f6314f001ae35d054acceb82306c23763ed5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f2386fe626a7b083b2b7ca0da19f6314f001ae35d054acceb82306c23763ed5", kill_on_drop: false }`
[INFO] [stdout] 7f2386fe626a7b083b2b7ca0da19f6314f001ae35d054acceb82306c23763ed5