[INFO] cloning repository https://github.com/reriliv/rust_study
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/reriliv/rust_study" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freriliv%2Frust_study", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freriliv%2Frust_study'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 43c9294986278fb3e72f56958abb5c4ed3fdf52a
[INFO] checking reriliv/rust_study against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freriliv%2Frust_study" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/reriliv/rust_study
[INFO] finished tweaking git repo https://github.com/reriliv/rust_study
[INFO] tweaked toml for git repo https://github.com/reriliv/rust_study written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/reriliv/rust_study on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/reriliv/rust_study 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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 064b620594f621f30c965a7ca42e6aec2366097306b4d2049a85adf97d92b268
[INFO] running `Command { std: "docker" "start" "-a" "064b620594f621f30c965a7ca42e6aec2366097306b4d2049a85adf97d92b268", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "064b620594f621f30c965a7ca42e6aec2366097306b4d2049a85adf97d92b268", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "064b620594f621f30c965a7ca42e6aec2366097306b4d2049a85adf97d92b268", kill_on_drop: false }`
[INFO] [stdout] 064b620594f621f30c965a7ca42e6aec2366097306b4d2049a85adf97d92b268
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c5842f981dbecd66be285382175912e033f857e9bdcad52e978159bf2062a46e
[INFO] running `Command { std: "docker" "start" "-a" "c5842f981dbecd66be285382175912e033f857e9bdcad52e978159bf2062a46e", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_study v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `self::tree_data::Node`
[INFO] [stdout]   --> src/smart_pointer_15/mod.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | use self::tree_data::Node;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::tree_data::Node`
[INFO] [stdout]   --> src/smart_pointer_15/mod.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | use self::tree_data::Node;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/smart_pointer_15/mod.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `tail` is never used
[INFO] [stdout]   --> src/smart_pointer_15/mod.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl List {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 16 |     fn tail(&self) -> Option<&RefCell<Rc<List>>> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Messenger` is never used
[INFO] [stdout]   --> src/smart_pointer_15/messenger.rs:41:11
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub trait Messenger {
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LimitTracker` is never constructed
[INFO] [stdout]   --> src/smart_pointer_15/messenger.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub struct LimitTracker<'a, T: Messenger> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `set_value` are never used
[INFO] [stdout]   --> src/smart_pointer_15/messenger.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 51 | / impl<'a, T> LimitTracker<'a, T>
[INFO] [stdout] 52 | | where
[INFO] [stdout] 53 | |     T: Messenger,
[INFO] [stdout]    | |_________________- associated items in this implementation
[INFO] [stdout] 54 |   {
[INFO] [stdout] 55 |       pub fn new(messenger: &'a T, max: usize) -> LimitTracker<'a, T> {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |       pub fn set_value(&mut self, value: usize) {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]  --> src/smart_pointer_15/tree_data.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Node {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 6 |     pub value: i32,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 7 |     pub parent: RefCell<Weak<Node>>,
[INFO] [stdout] 8 |     pub children: RefCell<Vec<Rc<Node>>>,
[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: enum `List` is never used
[INFO] [stdout]   --> src/smart_pointer_15/mod.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `tail` is never used
[INFO] [stdout]   --> src/smart_pointer_15/mod.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl List {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 16 |     fn tail(&self) -> Option<&RefCell<Rc<List>>> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]  --> src/smart_pointer_15/tree_data.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Node {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 6 |     pub value: i32,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 7 |     pub parent: RefCell<Weak<Node>>,
[INFO] [stdout] 8 |     pub children: RefCell<Vec<Rc<Node>>>,
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "c5842f981dbecd66be285382175912e033f857e9bdcad52e978159bf2062a46e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5842f981dbecd66be285382175912e033f857e9bdcad52e978159bf2062a46e", kill_on_drop: false }`
[INFO] [stdout] c5842f981dbecd66be285382175912e033f857e9bdcad52e978159bf2062a46e
