[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 try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvarshard%2Frust_playground" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/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-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/varshard/rust_playground on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 184d9e3dafd37673860adb3c87511cb59732a6074c3539687bc50a5bf0271046
[INFO] running `Command { std: "docker" "start" "-a" "184d9e3dafd37673860adb3c87511cb59732a6074c3539687bc50a5bf0271046", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "184d9e3dafd37673860adb3c87511cb59732a6074c3539687bc50a5bf0271046", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "184d9e3dafd37673860adb3c87511cb59732a6074c3539687bc50a5bf0271046", kill_on_drop: false }`
[INFO] [stdout] 184d9e3dafd37673860adb3c87511cb59732a6074c3539687bc50a5bf0271046
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b14ebbe1df75340169eef471834cb3055dae31f0ac7a785dc124b9edcf610f47
[INFO] running `Command { std: "docker" "start" "-a" "b14ebbe1df75340169eef471834cb3055dae31f0ac7a785dc124b9edcf610f47", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling serde v1.0.189
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling serde_json v1.0.107
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling rustix v0.38.20
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]    Compiling itoa v1.0.9
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling ryu v1.0.15
[INFO] [stderr]     Checking linux-raw-sys v0.4.10
[INFO] [stderr]     Checking once_cell v1.18.0
[INFO] [stderr]     Checking utf8parse v0.2.1
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]     Checking anstyle-query v1.0.0
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]     Checking anstyle v1.0.4
[INFO] [stderr]     Checking anstyle-parse v0.2.2
[INFO] [stderr]    Compiling peg-runtime v0.6.3
[INFO] [stderr]    Compiling aho-corasick v1.1.2
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]     Checking colorchoice v1.0.0
[INFO] [stderr]    Compiling bytecount v0.6.4
[INFO] [stderr]     Checking bstr v1.7.0
[INFO] [stderr]    Compiling thiserror v1.0.49
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]    Compiling peg-macros v0.6.3
[INFO] [stderr]     Checking anstream v0.6.4
[INFO] [stderr]     Checking walkdir v2.4.0
[INFO] [stderr]     Checking thread_local v1.1.7
[INFO] [stderr]    Compiling async-trait v0.1.74
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]    Compiling regex-syntax v0.7.5
[INFO] [stderr]     Checking smawk v0.3.2
[INFO] [stderr]     Checking clap_lex v0.5.1
[INFO] [stderr]    Compiling anyhow v1.0.75
[INFO] [stderr]     Checking smallvec v1.11.1
[INFO] [stderr]     Checking textwrap v0.16.0
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[INFO] [stderr]    Compiling itertools v0.11.0
[INFO] [stderr]     Checking parking_lot_core v0.9.8
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[INFO] [stderr]    Compiling inflections v1.1.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking console v0.15.7
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking socket2 v0.5.4
[INFO] [stderr]     Checking nom_locate v4.2.0
[INFO] [stderr]     Checking inventory v0.3.12
[INFO] [stderr]     Checking peg v0.6.3
[INFO] [stderr]     Checking drain_filter_polyfill v0.1.3
[INFO] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]     Checking bytes v1.5.0
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking cucumber_example v0.1.0 (/opt/rustwide/workdir/crates/cucumber_example)
[INFO] [stderr]     Checking tests v0.1.0 (/opt/rustwide/workdir/crates/tests)
[INFO] [stderr]     Checking coinchange v0.1.0 (/opt/rustwide/workdir/crates/coinchange)
[INFO] [stderr]     Checking binary_tree v0.1.0 (/opt/rustwide/workdir/crates/binary_tree)
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking iterator v0.1.0 (/opt/rustwide/workdir/crates/iterator)
[INFO] [stderr]     Checking playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Tree` is never constructed
[INFO] [stdout]  --> crates/binary_tree/src/lib.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Tree<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_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[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] error: could not compile `binary_tree` (lib) due to 1 previous error; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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] running `Command { std: "docker" "inspect" "b14ebbe1df75340169eef471834cb3055dae31f0ac7a785dc124b9edcf610f47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b14ebbe1df75340169eef471834cb3055dae31f0ac7a785dc124b9edcf610f47", kill_on_drop: false }`
[INFO] [stdout] b14ebbe1df75340169eef471834cb3055dae31f0ac7a785dc124b9edcf610f47