[INFO] cloning repository https://github.com/theodoreleebrant/bree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/theodoreleebrant/bree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheodoreleebrant%2Fbree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheodoreleebrant%2Fbree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fab3d0f719c050a9f262471d8ead3e9664dabda1
[INFO] checking theodoreleebrant/bree against try#b98202ad067d72e45cec8be3d5c15d86ef0fd086 for pr-155193
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheodoreleebrant%2Fbree" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/theodoreleebrant/bree
[INFO] finished tweaking git repo https://github.com/theodoreleebrant/bree
[INFO] tweaked toml for git repo https://github.com/theodoreleebrant/bree written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/theodoreleebrant/bree on toolchain b98202ad067d72e45cec8be3d5c15d86ef0fd086
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b98202ad067d72e45cec8be3d5c15d86ef0fd086" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/theodoreleebrant/bree 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" "+b98202ad067d72e45cec8be3d5c15d86ef0fd086" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ghost-cell v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+b98202ad067d72e45cec8be3d5c15d86ef0fd086" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 772fa7252d66a3f50dcaa19127284a4c4be6d3433713de8b21ed545b3609f5b5
[INFO] running `Command { std: "docker" "start" "-a" "772fa7252d66a3f50dcaa19127284a4c4be6d3433713de8b21ed545b3609f5b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "772fa7252d66a3f50dcaa19127284a4c4be6d3433713de8b21ed545b3609f5b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "772fa7252d66a3f50dcaa19127284a4c4be6d3433713de8b21ed545b3609f5b5", kill_on_drop: false }`
[INFO] [stdout] 772fa7252d66a3f50dcaa19127284a4c4be6d3433713de8b21ed545b3609f5b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+b98202ad067d72e45cec8be3d5c15d86ef0fd086" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a98018a2f86aeb1385ccf99c28facf7f00d2f679c72a5f0a4e67770ab3440776
[INFO] running `Command { std: "docker" "start" "-a" "a98018a2f86aeb1385ccf99c28facf7f00d2f679c72a5f0a4e67770ab3440776", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]     Checking ghost-cell v0.2.3
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking bree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `env` and `time::Instant`
[INFO] [stdout]  --> src/main.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{time::Instant, env}; 
[INFO] [stdout]   |           ^^^^^^^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Rc`, `RefCell`, and `Ref`
[INFO] [stdout]  --> src/tree.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 |     cell::{Ref, RefCell},
[INFO] [stdout]   |            ^^^  ^^^^^^^
[INFO] [stdout] 3 |     rc::{Rc}
[INFO] [stdout]   |          ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `env` and `time::Instant`
[INFO] [stdout]  --> src/main.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{time::Instant, env}; 
[INFO] [stdout]   |           ^^^^^^^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Rc`, `RefCell`, and `Ref`
[INFO] [stdout]  --> src/tree.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 |     cell::{Ref, RefCell},
[INFO] [stdout]   |            ^^^  ^^^^^^^
[INFO] [stdout] 3 |     rc::{Rc}
[INFO] [stdout]   |          ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:10:22
[INFO] [stdout]    |
[INFO] [stdout] 10 |     GhostToken::new(|mut token| {
[INFO] [stdout]    |                      ----^^^^^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `parent` is never read
[INFO] [stdout]   --> src/tree.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct Hook<'id, 'a> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 10 |     children: [Option<Arc<GhostCell<'id, Hook<'id, 'a>>>>; 2],
[INFO] [stdout] 11 |     parent: Option<Weak<GhostCell<'id, Hook<'id, 'a>>>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Hook` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `connect`, `parent`, and `collect_vec` are never used
[INFO] [stdout]   --> src/tree.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<'id, 'a> Hook<'id, 'a> {
[INFO] [stdout]    | --------------------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 53 |     fn connect(x: &Arc<GhostCell<'id, Self>>, i: usize, y: Option<Arc<GhostCell<'id, Hook<'id, 'a>>>>, token: &'a mut GhostToken<'id...
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     fn parent(&'a self) -> Option<Arc<GhostCell<'id, Hook<'id, 'a>>>> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     fn collect_vec(&self, vec: &mut Vec<u32>, token: &'a GhostToken<'id>) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BinarySearchTree` is never constructed
[INFO] [stdout]    --> src/tree.rs:126:12
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub struct BinarySearchTree<'id, 'a> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `insert` are never used
[INFO] [stdout]    --> src/tree.rs:131:12
[INFO] [stdout]     |
[INFO] [stdout] 130 | impl<'id, 'a> BinarySearchTree<'id, 'a> {
[INFO] [stdout]     | --------------------------------------- associated items in this implementation
[INFO] [stdout] 131 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 143 |     pub fn insert(&mut self, key: u32, token: &'a mut GhostToken<'id>) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:10:22
[INFO] [stdout]    |
[INFO] [stdout] 10 |     GhostToken::new(|mut token| {
[INFO] [stdout]    |                      ----^^^^^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `parent` is never read
[INFO] [stdout]   --> src/tree.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct Hook<'id, 'a> {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 10 |     children: [Option<Arc<GhostCell<'id, Hook<'id, 'a>>>>; 2],
[INFO] [stdout] 11 |     parent: Option<Weak<GhostCell<'id, Hook<'id, 'a>>>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Hook` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `connect`, `parent`, and `collect_vec` are never used
[INFO] [stdout]   --> src/tree.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<'id, 'a> Hook<'id, 'a> {
[INFO] [stdout]    | --------------------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 53 |     fn connect(x: &Arc<GhostCell<'id, Self>>, i: usize, y: Option<Arc<GhostCell<'id, Hook<'id, 'a>>>>, token: &'a mut GhostToken<'id...
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     fn parent(&'a self) -> Option<Arc<GhostCell<'id, Hook<'id, 'a>>>> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     fn collect_vec(&self, vec: &mut Vec<u32>, token: &'a GhostToken<'id>) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BinarySearchTree` is never constructed
[INFO] [stdout]    --> src/tree.rs:126:12
[INFO] [stdout]     |
[INFO] [stdout] 126 | pub struct BinarySearchTree<'id, 'a> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `insert` are never used
[INFO] [stdout]    --> src/tree.rs:131:12
[INFO] [stdout]     |
[INFO] [stdout] 130 | impl<'id, 'a> BinarySearchTree<'id, 'a> {
[INFO] [stdout]     | --------------------------------------- associated items in this implementation
[INFO] [stdout] 131 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 143 |     pub fn insert(&mut self, key: u32, token: &'a mut GhostToken<'id>) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.58s
[INFO] running `Command { std: "docker" "inspect" "a98018a2f86aeb1385ccf99c28facf7f00d2f679c72a5f0a4e67770ab3440776", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a98018a2f86aeb1385ccf99c28facf7f00d2f679c72a5f0a4e67770ab3440776", kill_on_drop: false }`
[INFO] [stdout] a98018a2f86aeb1385ccf99c28facf7f00d2f679c72a5f0a4e67770ab3440776
