[INFO] cloning repository https://github.com/heya-naohiro/miqo-topic
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/heya-naohiro/miqo-topic" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fheya-naohiro%2Fmiqo-topic", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fheya-naohiro%2Fmiqo-topic'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8281365965f355cec0d9d77cad8e5e26b041938b
[INFO] checking heya-naohiro/miqo-topic against master#419b3e2d3e350822550eee0e82eeded4d324d584 for pr-135536
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fheya-naohiro%2Fmiqo-topic" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/heya-naohiro/miqo-topic on toolchain 419b3e2d3e350822550eee0e82eeded4d324d584
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+419b3e2d3e350822550eee0e82eeded4d324d584" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/heya-naohiro/miqo-topic
[INFO] finished tweaking git repo https://github.com/heya-naohiro/miqo-topic
[INFO] tweaked toml for git repo https://github.com/heya-naohiro/miqo-topic written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/heya-naohiro/miqo-topic 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" "+419b3e2d3e350822550eee0e82eeded4d324d584" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+419b3e2d3e350822550eee0e82eeded4d324d584" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1fa440ac43952b16e0abeb2e91303cfb890624c271a4592c959dfaae00eecc7d
[INFO] running `Command { std: "docker" "start" "-a" "1fa440ac43952b16e0abeb2e91303cfb890624c271a4592c959dfaae00eecc7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1fa440ac43952b16e0abeb2e91303cfb890624c271a4592c959dfaae00eecc7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fa440ac43952b16e0abeb2e91303cfb890624c271a4592c959dfaae00eecc7d", kill_on_drop: false }`
[INFO] [stdout] 1fa440ac43952b16e0abeb2e91303cfb890624c271a4592c959dfaae00eecc7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+419b3e2d3e350822550eee0e82eeded4d324d584" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b013856304e68e26eea58d70766194dbb740e7d8fea78fbaa3237174bb2ea48
[INFO] running `Command { std: "docker" "start" "-a" "7b013856304e68e26eea58d70766194dbb740e7d8fea78fbaa3237174bb2ea48", kill_on_drop: false }`
[INFO] [stderr]     Checking miqo-topic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `BorrowMut`
[INFO] [stdout]  --> src/lib.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                           ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Borrow`
[INFO] [stdout]  --> src/lib.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/lib.rs:49:26
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn delete_subscriber(node: &Rc<Node<T>>, id: String, topic_filter: String) {
[INFO] [stdout]    |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> src/lib.rs:49:46
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn delete_subscriber(node: &Rc<Node<T>>, id: String, topic_filter: String) {
[INFO] [stdout]    |                                              ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `topic_filter`
[INFO] [stdout]   --> src/lib.rs:49:58
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn delete_subscriber(node: &Rc<Node<T>>, id: String, topic_filter: String) {
[INFO] [stdout]    |                                                          ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_topic_filter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BorrowMut`
[INFO] [stdout]  --> src/lib.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                           ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Borrow`
[INFO] [stdout]  --> src/lib.rs:2:19
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::borrow::{Borrow, BorrowMut};
[INFO] [stdout]   |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/lib.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Node<T: Debug + Clone> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new_node` is never used
[INFO] [stdout]   --> src/lib.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl<T: Debug + Clone> Node<T> {
[INFO] [stdout]    | ------------------------------ associated function in this implementation
[INFO] [stdout] 16 |     pub fn new_node(value: Option<T>) -> Node<T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tree` is never constructed
[INFO] [stdout]   --> src/lib.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Tree<T: Debug + Clone> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `add_child_node`, `add_subscriber`, `delete_subscriber`, and `search_topic` are never used
[INFO] [stdout]   --> src/lib.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl<T: Debug + Clone> Tree<T> {
[INFO] [stdout]    | ------------------------------ associated functions in this implementation
[INFO] [stdout] 31 |     fn add_child_node(parent: &Rc<Node<T>>, child: Rc<Node<T>>, key: String) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn add_subscriber(root: &Rc<Node<T>>, topic_filter: String, value: Option<T>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn delete_subscriber(node: &Rc<Node<T>>, id: String, topic_filter: String) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn search_topic(node: &Rc<Node<T>>, topic: String) -> Vec<Option<T>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/lib.rs:49:26
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn delete_subscriber(node: &Rc<Node<T>>, id: String, topic_filter: String) {
[INFO] [stdout]    |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> src/lib.rs:49:46
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn delete_subscriber(node: &Rc<Node<T>>, id: String, topic_filter: String) {
[INFO] [stdout]    |                                              ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `topic_filter`
[INFO] [stdout]   --> src/lib.rs:49:58
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn delete_subscriber(node: &Rc<Node<T>>, id: String, topic_filter: String) {
[INFO] [stdout]    |                                                          ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_topic_filter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/lib.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | struct Node<T: Debug + Clone> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 9  |     value: Option<T>,
[INFO] [stdout] 10 |     id: Option<String>,
[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]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `rootnode` is never read
[INFO] [stdout]   --> src/lib.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Tree<T: Debug + Clone> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 27 |     rootnode: Node<T>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `delete_subscriber` is never used
[INFO] [stdout]   --> src/lib.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl<T: Debug + Clone> Tree<T> {
[INFO] [stdout]    | ------------------------------ associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn delete_subscriber(node: &Rc<Node<T>>, id: String, topic_filter: String) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `parent` are never read
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Node {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 7 |     value: Option<i32>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     children: RefCell<HashMap<String, Rc<Node>>>,
[INFO] [stdout] 9 |     parent: RefCell<Weak<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]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `parent` are never read
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Node {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 7 |     value: Option<i32>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     children: RefCell<HashMap<String, Rc<Node>>>,
[INFO] [stdout] 9 |     parent: RefCell<Weak<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]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "7b013856304e68e26eea58d70766194dbb740e7d8fea78fbaa3237174bb2ea48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b013856304e68e26eea58d70766194dbb740e7d8fea78fbaa3237174bb2ea48", kill_on_drop: false }`
[INFO] [stdout] 7b013856304e68e26eea58d70766194dbb740e7d8fea78fbaa3237174bb2ea48