[INFO] cloning repository https://github.com/ProstoLive/double-linked-list
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ProstoLive/double-linked-list" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FProstoLive%2Fdouble-linked-list", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FProstoLive%2Fdouble-linked-list'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 874938299da62109d9a7eb1040ef8ddf502a8e25
[INFO] checking ProstoLive/double-linked-list against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FProstoLive%2Fdouble-linked-list" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ProstoLive/double-linked-list
[INFO] finished tweaking git repo https://github.com/ProstoLive/double-linked-list
[INFO] tweaked toml for git repo https://github.com/ProstoLive/double-linked-list written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ProstoLive/double-linked-list on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ProstoLive/double-linked-list 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9ba8aaac0fd864c09af09597e1ae14b7ab6ac6fb80fc560b8997ad1ab225c3ca
[INFO] running `Command { std: "docker" "start" "-a" "9ba8aaac0fd864c09af09597e1ae14b7ab6ac6fb80fc560b8997ad1ab225c3ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ba8aaac0fd864c09af09597e1ae14b7ab6ac6fb80fc560b8997ad1ab225c3ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ba8aaac0fd864c09af09597e1ae14b7ab6ac6fb80fc560b8997ad1ab225c3ca", kill_on_drop: false }`
[INFO] [stdout] 9ba8aaac0fd864c09af09597e1ae14b7ab6ac6fb80fc560b8997ad1ab225c3ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e741d388a0324e503187e551d6c5befa7078d2b366002bd4dd5403bff373ac02
[INFO] running `Command { std: "docker" "start" "-a" "e741d388a0324e503187e551d6c5befa7078d2b366002bd4dd5403bff373ac02", kill_on_drop: false }`
[INFO] [stderr]     Checking dl-list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `target_data`
[INFO] [stdout]   --> src/lib.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |     fn find(target_data: T) {
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/lib.rs:76:15
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn delete(node: Rc<Node<T>>) {
[INFO] [stdout]    |               ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/lib.rs:79:21
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn insert_after(node: Rc<Node<T>>, anchor_node: T) {
[INFO] [stdout]    |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `anchor_node`
[INFO] [stdout]   --> src/lib.rs:79:40
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn insert_after(node: Rc<Node<T>>, anchor_node: T) {
[INFO] [stdout]    |                                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_anchor_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `List` is never constructed
[INFO] [stdout]  --> src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct List<T> {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Node` is never constructed
[INFO] [stdout]   --> src/lib.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Node<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `head`, `tail`, and `length` are never read
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct List<T> {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 6 |     head: Option<Rc<RefCell<Node<T>>>>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 7 |     tail: Option<Rc<RefCell<Node<T>>>>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 8 |     length: usize,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `data`, `next`, and `prev` are never read
[INFO] [stdout]   --> src/lib.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Node<T> {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 13 |     data: T,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 14 |     next: Option<Rc<RefCell<Node<T>>>>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 15 |     prev: Option<Rc<RefCell<Node<T>>>>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `DoubleLinkedList` is never used
[INFO] [stdout]   --> src/lib.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | trait DoubleLinkedList<T> {
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dl-list` (lib) due to 2 previous errors; 7 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `target_data`
[INFO] [stdout]   --> src/lib.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |     fn find(target_data: T) {
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_target_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/lib.rs:76:15
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn delete(node: Rc<Node<T>>) {
[INFO] [stdout]    |               ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/lib.rs:79:21
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn insert_after(node: Rc<Node<T>>, anchor_node: T) {
[INFO] [stdout]    |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `anchor_node`
[INFO] [stdout]   --> src/lib.rs:79:40
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn insert_after(node: Rc<Node<T>>, anchor_node: T) {
[INFO] [stdout]    |                                        ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_anchor_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `length` is never read
[INFO] [stdout]  --> src/lib.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct List<T> {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 8 |     length: usize,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `pop_front`, `pop_back`, `find`, `delete`, and `insert_after` are never used
[INFO] [stdout]   --> src/lib.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | trait DoubleLinkedList<T> {
[INFO] [stdout]    |       ---------------- associated items in this trait
[INFO] [stdout] ...
[INFO] [stdout] 22 |     fn pop_front(&mut self) -> Option<T>;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 23 |     fn pop_back();
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 24 |
[INFO] [stdout] 25 |     fn find(target_data: T);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 26 |     fn delete(node: Rc<Node<T>>);
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 27 |     fn insert_after(node: Rc<Node<T>>, anchor_node: T);
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e741d388a0324e503187e551d6c5befa7078d2b366002bd4dd5403bff373ac02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e741d388a0324e503187e551d6c5befa7078d2b366002bd4dd5403bff373ac02", kill_on_drop: false }`
[INFO] [stdout] e741d388a0324e503187e551d6c5befa7078d2b366002bd4dd5403bff373ac02
