[INFO] cloning repository https://github.com/Squirre17/rust-algo-impl
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Squirre17/rust-algo-impl" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSquirre17%2Frust-algo-impl", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSquirre17%2Frust-algo-impl'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3584c160bba38b1ef19111545a27fa4ebeec6dc
[INFO] checking Squirre17/rust-algo-impl/d3584c160bba38b1ef19111545a27fa4ebeec6dc against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSquirre17%2Frust-algo-impl" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Squirre17/rust-algo-impl on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Squirre17/rust-algo-impl
[INFO] finished tweaking git repo https://github.com/Squirre17/rust-algo-impl
[INFO] tweaked toml for git repo https://github.com/Squirre17/rust-algo-impl written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Squirre17/rust-algo-impl 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd8dc559419681a359a35b5b7f2cc4e4cb1f170d847e6379cb09c4302828b2e5
[INFO] running `Command { std: "docker" "start" "-a" "fd8dc559419681a359a35b5b7f2cc4e4cb1f170d847e6379cb09c4302828b2e5", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_algo_coll v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/link_list/node.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/link_list/mod.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> src/tree/node.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> src/tree/node.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/tree/node.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `year_registered`, and `username` are never read
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 8  |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 9  |     year_registered: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 10 |     username: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LinkedList` is never constructed
[INFO] [stdout]  --> src/link_list/mod.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct LinkedList{
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push_end`, `push_front`, `pop_front`, `traverse`, and `gen_arr` are never used
[INFO] [stdout]    --> src/link_list/mod.rs:17:12
[INFO] [stdout]     |
[INFO] [stdout] 16  | impl LinkedList {
[INFO] [stdout]     | --------------- associated items in this implementation
[INFO] [stdout] 17  |     pub fn new(data : i32) -> Self{
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 25  |     pub fn push_end(&mut self, elem : i32) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46  |     pub fn push_front(&mut self, elem : i32){
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62  |     pub fn pop_front(&mut self) -> Option<i32> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89  |     pub fn traverse(&self) {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |     fn gen_arr(&self) -> Vec<i32> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/link_list/node.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Node {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 13 |     pub fn new(data : i32) -> NodeRef {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/link_list/node.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl LinkListIter {
[INFO] [stdout]    | ----------------- associated function in this implementation
[INFO] [stdout] 31 |     pub fn new(start : NodeOpt) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `TnRef` is never used
[INFO] [stdout]  --> src/tree/node.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | type TnRef  = Rc<RefCell<TreeNode>>;
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `TnWeak` is never used
[INFO] [stdout]   --> src/tree/node.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | type TnWeak = Weak<RefCell<TreeNode>>;
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TreeNode` is never constructed
[INFO] [stdout]   --> src/tree/node.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct TreeNode {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_child`, and `pprint` are never used
[INFO] [stdout]   --> src/tree/node.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl TreeNode {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 22 |     pub fn new(value : Option<u32>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn add_child(&mut self, node : &TnRef) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn pprint(&self) -> String {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/tree/node.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `year_registered`, and `username` are never read
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 8  |     id: u32,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 9  |     year_registered: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 10 |     username: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `length` is never read
[INFO] [stdout]   --> src/link_list/mod.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct LinkedList{
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub length : usize,  
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LinkedList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `traverse` is never used
[INFO] [stdout]   --> src/link_list/mod.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl LinkedList {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 89 |     pub fn traverse(&self) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `parent` is never read
[INFO] [stdout]   --> src/tree/node.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct TreeNode {
[INFO] [stdout]    |        -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub parent   : Option<TnWeak>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TreeNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "fd8dc559419681a359a35b5b7f2cc4e4cb1f170d847e6379cb09c4302828b2e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd8dc559419681a359a35b5b7f2cc4e4cb1f170d847e6379cb09c4302828b2e5", kill_on_drop: false }`
[INFO] [stdout] fd8dc559419681a359a35b5b7f2cc4e4cb1f170d847e6379cb09c4302828b2e5