[INFO] cloning repository https://github.com/LemonHX/cgc-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LemonHX/cgc-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLemonHX%2Fcgc-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLemonHX%2Fcgc-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b0852f0d06c9f56ebe2b762749b057b685b4e2a0
[INFO] checking LemonHX/cgc-rs against 65b20a97de33e9e59992793a144aef2950c48c76 for pr-154715
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLemonHX%2Fcgc-rs" "/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/LemonHX/cgc-rs
[INFO] finished tweaking git repo https://github.com/LemonHX/cgc-rs
[INFO] tweaked toml for git repo https://github.com/LemonHX/cgc-rs written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LemonHX/cgc-rs on toolchain 65b20a97de33e9e59992793a144aef2950c48c76
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+65b20a97de33e9e59992793a144aef2950c48c76" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/LemonHX/cgc-rs 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" "+65b20a97de33e9e59992793a144aef2950c48c76" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded dashmap v4.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] a80b71dc866b9198c781b063237ecbdd69341f428d34acd240a278c23251ed19
[INFO] running `Command { std: "docker" "start" "a80b71dc866b9198c781b063237ecbdd69341f428d34acd240a278c23251ed19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a80b71dc866b9198c781b063237ecbdd69341f428d34acd240a278c23251ed19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a80b71dc866b9198c781b063237ecbdd69341f428d34acd240a278c23251ed19" "/opt/rustwide/cargo-home/bin/cargo" "+65b20a97de33e9e59992793a144aef2950c48c76" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a80b71dc866b9198c781b063237ecbdd69341f428d34acd240a278c23251ed19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a80b71dc866b9198c781b063237ecbdd69341f428d34acd240a278c23251ed19" "/opt/rustwide/cargo-home/bin/cargo" "+65b20a97de33e9e59992793a144aef2950c48c76" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking dashmap v4.0.2
[INFO] [stderr]     Checking cgc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `core_intrinsics` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core_intrinsics)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::frame::GCFrame`
[INFO] [stdout]  --> src/state.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::frame::GCFrame;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `core_intrinsics` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core_intrinsics)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `intrinsics::size_of`
[INFO] [stdout]  --> src/frame.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     intrinsics::size_of,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::frame::GCFrame`
[INFO] [stdout]  --> src/state.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::frame::GCFrame;
[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 import: `intrinsics::size_of`
[INFO] [stdout]  --> src/frame.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     intrinsics::size_of,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `backtrace` has been stable since 1.65.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(backtrace)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `backtrace` has been stable since 1.65.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(backtrace)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DummyMonitoring` is never constructed
[INFO] [stdout]   --> src/state.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct DummyMonitoring {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GCStage` is never used
[INFO] [stdout]   --> src/state.rs:33:6
[INFO] [stdout]    |
[INFO] [stdout] 33 | enum GCStage {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MinorGCStage` is never used
[INFO] [stdout]   --> src/state.rs:46:6
[INFO] [stdout]    |
[INFO] [stdout] 46 | enum MinorGCStage {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DummyMonitoring` is never constructed
[INFO] [stdout]   --> src/state.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct DummyMonitoring {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GCStage` is never used
[INFO] [stdout]   --> src/state.rs:33:6
[INFO] [stdout]    |
[INFO] [stdout] 33 | enum GCStage {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MinorGCStage` is never used
[INFO] [stdout]   --> src/state.rs:46:6
[INFO] [stdout]    |
[INFO] [stdout] 46 | enum MinorGCStage {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> src/state.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub struct GCConfig {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 55 |     thread_pool_size: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     minor_gc_trigger_size: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |     minor_heap_size_limit: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     major_heap_liveness: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     major_gc_pacer_rate: f32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     major_heap_size_limit: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     enable_imm_gen: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     imm_liveness: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]    --> src/state.rs:104:16
[INFO] [stdout]     |
[INFO] [stdout] 102 | pub struct State {
[INFO] [stdout]     |            ----- fields in this struct
[INFO] [stdout] 103 |     /// TODO: discuss if we can change it in runtime
[INFO] [stdout] 104 |     pub(crate) config: GCConfig,
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 105 |
[INFO] [stdout] 106 |     pub(crate)  rayon_pool: rayon::ThreadPool,
[INFO] [stdout]     |                 ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 110 |     pub(crate) start_minor_gc_flag: AtomicBool,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 111 |     pub(crate) start_major_gc_flag: AtomicBool,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 115 |     pub(crate) minor_heap_size: AtomicUsize,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^
[INFO] [stdout] 116 |     /// the size of major_heap generation
[INFO] [stdout] 117 |     pub(crate) major_heap_size: AtomicUsize,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^
[INFO] [stdout] 118 |     /// the size of imm generation
[INFO] [stdout] 119 |     pub(crate) imm_size: AtomicUsize,
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] 120 |     /// the size of total heap
[INFO] [stdout] 121 |     pub(crate) total_size: AtomicUsize,
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 128 |     pub(crate) current_frame_count: AtomicUsize,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 133 |     pub(crate) minor_heap_roots: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 134 |     pub(crate) minor_heap_gen: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^
[INFO] [stdout] 135 |     pub(crate) minor_heap_marked: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 136 |     pub(crate) minor_heap_dead: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 141 |     pub(crate) major_heap_roots: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 142 |     pub(crate) major_heap_gen: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^
[INFO] [stdout] 143 |     pub(crate) major_heap_marked: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 144 |     pub(crate) major_heap_rescan_list: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 150 |     pub(crate) imm_gen: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ThreadPool` is never constructed
[INFO] [stdout]    --> src/state.rs:188:8
[INFO] [stdout]     |
[INFO] [stdout] 188 | struct ThreadPool {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `state`, `registed_gc_objects`, and `escaped_gc_objects` are never read
[INFO] [stdout]   --> src/frame.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct GCFrame {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 17 |     state: &'static State,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 18 |     registed_gc_objects: Set<*mut GCHeader>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 19 |     escaped_gc_objects: *mut GCHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `allocate_gc_cell` is never used
[INFO] [stdout]   --> src/frame.rs:23:19
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl GCFrame {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 23 |     pub(crate) fn allocate_gc_cell<T: Trace>(&self, value: T) -> GCCell<T> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> src/state.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub struct GCConfig {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 55 |     thread_pool_size: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     minor_gc_trigger_size: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |     minor_heap_size_limit: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     major_heap_liveness: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     major_gc_pacer_rate: f32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     major_heap_size_limit: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     enable_imm_gen: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     imm_liveness: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `frame` and `value` are never read
[INFO] [stdout]   --> src/gc_box.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | pub struct GCBox<T: Trace> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout]  9 |     frame: &'static GCFrame,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     value: GCCell<T>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/gc_box.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T: Trace> GCBox<T> {
[INFO] [stdout]    | ----------------------- associated function in this implementation
[INFO] [stdout] 13 |     fn new(frame: &'static GCFrame, value: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GCCellLayout` is never constructed
[INFO] [stdout]   --> src/gc_box.rs:78:19
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub(crate) struct GCCellLayout<T: Trace> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `init` is never used
[INFO] [stdout]    --> src/gc_box.rs:100:19
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl GCHeader {
[INFO] [stdout]     | ------------- method in this implementation
[INFO] [stdout] 100 |     pub(crate) fn init<T: Trace>(&mut self) {
[INFO] [stdout]     |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]    --> src/state.rs:104:16
[INFO] [stdout]     |
[INFO] [stdout] 102 | pub struct State {
[INFO] [stdout]     |            ----- fields in this struct
[INFO] [stdout] 103 |     /// TODO: discuss if we can change it in runtime
[INFO] [stdout] 104 |     pub(crate) config: GCConfig,
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 105 |
[INFO] [stdout] 106 |     pub(crate)  rayon_pool: rayon::ThreadPool,
[INFO] [stdout]     |                 ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 110 |     pub(crate) start_minor_gc_flag: AtomicBool,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 111 |     pub(crate) start_major_gc_flag: AtomicBool,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 115 |     pub(crate) minor_heap_size: AtomicUsize,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^
[INFO] [stdout] 116 |     /// the size of major_heap generation
[INFO] [stdout] 117 |     pub(crate) major_heap_size: AtomicUsize,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^
[INFO] [stdout] 118 |     /// the size of imm generation
[INFO] [stdout] 119 |     pub(crate) imm_size: AtomicUsize,
[INFO] [stdout]     |                ^^^^^^^^
[INFO] [stdout] 120 |     /// the size of total heap
[INFO] [stdout] 121 |     pub(crate) total_size: AtomicUsize,
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 128 |     pub(crate) current_frame_count: AtomicUsize,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 133 |     pub(crate) minor_heap_roots: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 134 |     pub(crate) minor_heap_gen: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^
[INFO] [stdout] 135 |     pub(crate) minor_heap_marked: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 136 |     pub(crate) minor_heap_dead: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 141 |     pub(crate) major_heap_roots: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 142 |     pub(crate) major_heap_gen: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^
[INFO] [stdout] 143 |     pub(crate) major_heap_marked: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 144 |     pub(crate) major_heap_rescan_list: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 150 |     pub(crate) imm_gen: Set<*mut GCHeader>,
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ThreadPool` is never constructed
[INFO] [stdout]    --> src/state.rs:188:8
[INFO] [stdout]     |
[INFO] [stdout] 188 | struct ThreadPool {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `state`, `registed_gc_objects`, and `escaped_gc_objects` are never read
[INFO] [stdout]   --> src/frame.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct GCFrame {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 17 |     state: &'static State,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 18 |     registed_gc_objects: Set<*mut GCHeader>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 19 |     escaped_gc_objects: *mut GCHeader,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `allocate_gc_cell` is never used
[INFO] [stdout]   --> src/frame.rs:23:19
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl GCFrame {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 23 |     pub(crate) fn allocate_gc_cell<T: Trace>(&self, value: T) -> GCCell<T> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `frame` and `value` are never read
[INFO] [stdout]   --> src/gc_box.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | pub struct GCBox<T: Trace> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout]  9 |     frame: &'static GCFrame,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     value: GCCell<T>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/gc_box.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T: Trace> GCBox<T> {
[INFO] [stdout]    | ----------------------- associated function in this implementation
[INFO] [stdout] 13 |     fn new(frame: &'static GCFrame, value: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GCCellLayout` is never constructed
[INFO] [stdout]   --> src/gc_box.rs:78:19
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub(crate) struct GCCellLayout<T: Trace> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `init` is never used
[INFO] [stdout]    --> src/gc_box.rs:100:19
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl GCHeader {
[INFO] [stdout]     | ------------- method in this implementation
[INFO] [stdout] 100 |     pub(crate) fn init<T: Trace>(&mut self) {
[INFO] [stdout]     |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "a80b71dc866b9198c781b063237ecbdd69341f428d34acd240a278c23251ed19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a80b71dc866b9198c781b063237ecbdd69341f428d34acd240a278c23251ed19", kill_on_drop: false }`
[INFO] [stdout] a80b71dc866b9198c781b063237ecbdd69341f428d34acd240a278c23251ed19
