[INFO] cloning repository https://github.com/varshard/rust_playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/varshard/rust_playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvarshard%2Frust_playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvarshard%2Frust_playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5713e6152f4e0ecc6baab8015f190ce23b8346cd
[INFO] checking varshard/rust_playground against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvarshard%2Frust_playground" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/varshard/rust_playground
[INFO] finished tweaking git repo https://github.com/varshard/rust_playground
[INFO] tweaked toml for git repo https://github.com/varshard/rust_playground written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/varshard/rust_playground on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/varshard/rust_playground 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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd27de38aa6be4dd933989f2d1eb515fb286bbe1777ce5140912c8aae1f3d7cb
[INFO] running `Command { std: "docker" "start" "-a" "dd27de38aa6be4dd933989f2d1eb515fb286bbe1777ce5140912c8aae1f3d7cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd27de38aa6be4dd933989f2d1eb515fb286bbe1777ce5140912c8aae1f3d7cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd27de38aa6be4dd933989f2d1eb515fb286bbe1777ce5140912c8aae1f3d7cb", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b1e240e0a616e7841e6bfec5eb6a0351ade9dfb7ca4c38db7edfb81c6fb87ef4
[INFO] running `Command { std: "docker" "start" "-a" "b1e240e0a616e7841e6bfec5eb6a0351ade9dfb7ca4c38db7edfb81c6fb87ef4", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]    Compiling serde_derive v1.0.189
[INFO] [stderr]    Compiling rustix v0.38.20
[INFO] [stderr]    Compiling sealed v0.5.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking linux-raw-sys v0.4.10
[INFO] [stderr]     Checking futures-channel v0.3.28
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling bytecount v0.6.4
[INFO] [stderr]    Compiling peg-runtime v0.6.3
[INFO] [stderr]     Checking walkdir v2.4.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.49
[INFO] [stderr]    Compiling typed-builder-macro v0.15.2
[INFO] [stderr]     Checking textwrap v0.16.0
[INFO] [stderr]    Compiling itertools v0.11.0
[INFO] [stderr]    Compiling clap_derive v4.4.2
[INFO] [stderr]    Compiling pin-project-internal v1.1.3
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]    Compiling async-trait v0.1.74
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[INFO] [stderr]    Compiling aho-corasick v1.1.2
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[INFO] [stderr]     Checking console v0.15.7
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling smart-default v0.7.1
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[INFO] [stderr]     Checking drain_filter_polyfill v0.1.3
[INFO] [stderr]     Checking terminal_size v0.3.0
[INFO] [stderr]    Compiling synthez-codegen v0.3.1
[INFO] [stderr]     Checking inventory v0.3.12
[INFO] [stderr]     Checking cucumber_example v0.1.0 (/opt/rustwide/workdir/crates/cucumber_example)
[INFO] [stderr]     Checking clap_builder v4.4.6
[INFO] [stderr]     Checking linkedlist v0.1.0 (/opt/rustwide/workdir/crates/linkedlist)
[INFO] [stderr]     Checking coinchange v0.1.0 (/opt/rustwide/workdir/crates/coinchange)
[INFO] [stdout] warning: methods `length` and `is_empty` are never used
[INFO] [stdout]   --> crates/linkedlist/src/lib.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl<T> LinkedList<T> {
[INFO] [stdout]    | --------------------- methods in this implementation
[INFO] [stdout] 36 |     fn length(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     fn is_empty(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tests v0.1.0 (/opt/rustwide/workdir/crates/tests)
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking heap v0.1.0 (/opt/rustwide/workdir/crates/heap)
[INFO] [stderr]     Checking binary_tree v0.1.0 (/opt/rustwide/workdir/crates/binary_tree)
[INFO] [stderr]    Compiling synthez v0.3.1
[INFO] [stderr]     Checking error_handling v0.1.0 (/opt/rustwide/workdir/crates/error_handling)
[INFO] [stdout] warning: field `root` is never read
[INFO] [stdout]  --> crates/binary_tree/src/lib.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Tree<T> {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 8 |     root: Option<TreeNode<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: fields `value`, `left`, and `right` are never read
[INFO] [stdout]   --> crates/binary_tree/src/lib.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Node<T> {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 13 |     value: T,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 14 |     left: Option<TreeNode<T>>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 15 |     right: Option<TreeNode<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: associated items `new` and `insert` are never used
[INFO] [stdout]   --> crates/binary_tree/src/lib.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl<T: Ord> Node<T> {
[INFO] [stdout]    | -------------------- associated items in this implementation
[INFO] [stdout] 21 |     fn new(value: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn insert(&mut self, node: TreeNode<T>) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert`, and `sum_tree` are never used
[INFO] [stdout]   --> crates/binary_tree/src/lib.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl<T: Ord + Add<Output=T> + Default + Copy> Tree<T> {
[INFO] [stdout]    | ----------------------------------------------------- associated items in this implementation
[INFO] [stdout] 57 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn insert(&mut self, value: T) -> &mut Self {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     fn sum_tree(&self) -> T {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio v1.33.0
[INFO] [stderr]     Checking iterator v0.1.0 (/opt/rustwide/workdir/crates/iterator)
[INFO] [stderr]     Checking playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking first_missing_positive v0.1.0 (/opt/rustwide/workdir/crates/first_missing_positive)
[INFO] [stdout] warning: struct `Heap` is never constructed
[INFO] [stdout]  --> crates/heap/src/lib.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Heap {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> crates/heap/src/lib.rs:8:12
[INFO] [stdout]    |
[INFO] [stdout]  7 | impl Heap {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout]  8 |     pub fn new() -> Self<> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn push(&mut self, v: i32) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub fn pop(&mut self) -> Option<i32>{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 76 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     fn parent(&self, i: usize) -> usize {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |     fn left(&self, i: usize) -> usize {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 88 |     fn right(&self, i: usize) -> usize {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value`, `next`, and `prev` are never read
[INFO] [stdout]   --> crates/linkedlist/src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Node<T> {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 17 |     value: T,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 18 |     // use box, because it's not possible to predetermine the size of next, so use heap
[INFO] [stdout] 19 |     next: Link<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 20 |     prev: Link<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: associated function `new` is never used
[INFO] [stdout]   --> crates/linkedlist/src/lib.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl<T> Node<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 24 |     fn new(val: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `head`, `tail`, and `size` are never read
[INFO] [stdout]   --> crates/linkedlist/src/lib.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct LinkedList<T> {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 30 |     head: Link<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 31 |     tail: Link<T>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 32 |     size: usize,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `length`, `is_empty`, `new`, `append`, and `pop_front` are never used
[INFO] [stdout]   --> crates/linkedlist/src/lib.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl<T> LinkedList<T> {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout] 36 |     fn length(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     fn is_empty(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn append(&mut self, val: T) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 76 |     fn pop_front(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking macros v0.1.0 (/opt/rustwide/workdir/crates/macros)
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> crates/iterator/src/lib.rs:23:40
[INFO] [stdout]    |
[INFO] [stdout] 23 |         assert_eq!(map.iter().filter(|(k, v)| **v == String::from("bar"))
[INFO] [stdout]    |                                        ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]     Checking clap v4.4.6
[INFO] [stderr]     Checking nom_locate v4.2.0
[INFO] [stderr]    Compiling serde v1.0.189
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]     Checking globset v0.4.13
[INFO] [stderr]     Checking cucumber-expressions v0.3.0
[INFO] [stderr]     Checking ignore v0.4.20
[INFO] [stderr]     Checking globwalk v0.8.1
[INFO] [stderr]     Checking serde_json v1.0.107
[INFO] [stderr]    Compiling lazy-regex-proc_macros v3.0.1
[INFO] [stderr]     Checking lazy-regex v3.0.2
[INFO] [stderr]    Compiling cucumber-codegen v0.20.1
[INFO] [stderr]    Compiling gherkin v0.14.0
[INFO] [stderr]     Checking cucumber v0.20.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 34.30s
[INFO] running `Command { std: "docker" "inspect" "b1e240e0a616e7841e6bfec5eb6a0351ade9dfb7ca4c38db7edfb81c6fb87ef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1e240e0a616e7841e6bfec5eb6a0351ade9dfb7ca4c38db7edfb81c6fb87ef4", kill_on_drop: false }`
[INFO] [stdout] b1e240e0a616e7841e6bfec5eb6a0351ade9dfb7ca4c38db7edfb81c6fb87ef4
