[INFO] cloning repository https://github.com/albanread/GC-
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/albanread/GC-" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falbanread%2FGC-", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falbanread%2FGC-'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cbbd3ee01415c1dc95457e0264714eaac571a2bc
[INFO] checking albanread/GC- against 011c518242557d21690f7936b5812318dc2fec47 for pr-159877
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falbanread%2FGC-" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/albanread/GC-
[INFO] finished tweaking git repo https://github.com/albanread/GC-
[INFO] tweaked toml for git repo https://github.com/albanread/GC- written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/albanread/GC- on toolchain 011c518242557d21690f7936b5812318dc2fec47
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+011c518242557d21690f7936b5812318dc2fec47" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/albanread/GC- 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" "+011c518242557d21690f7936b5812318dc2fec47" "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-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1fa6594d87c8fa7b311925a7a77a16f539833322d9dfba4ce891f211db2f90b1" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 7f18c391ea14c75a29620bc32f3ad3c90916de8151954096269660e37d75f81e
[INFO] running `Command { std: "docker" "start" "7f18c391ea14c75a29620bc32f3ad3c90916de8151954096269660e37d75f81e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f18c391ea14c75a29620bc32f3ad3c90916de8151954096269660e37d75f81e", 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" "7f18c391ea14c75a29620bc32f3ad3c90916de8151954096269660e37d75f81e" "/opt/rustwide/cargo-home/bin/cargo" "+011c518242557d21690f7936b5812318dc2fec47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f18c391ea14c75a29620bc32f3ad3c90916de8151954096269660e37d75f81e", 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" "7f18c391ea14c75a29620bc32f3ad3c90916de8151954096269660e37d75f81e" "/opt/rustwide/cargo-home/bin/cargo" "+011c518242557d21690f7936b5812318dc2fec47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking newgc-core v0.0.0 (/opt/rustwide/workdir/crates/newgc-core)
[INFO] [stdout] warning: unused import: `HeapType`
[INFO] [stdout]   --> crates/newgc-core/src/lisp_layout.rs:18:38
[INFO] [stdout]    |
[INFO] [stdout] 18 | use crate::heap_common::{HeapHeader, HeapType};
[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: `crate::heap_common::HeapHeader`
[INFO] [stdout]   --> crates/newgc-core/src/page_heap/evac.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 | use crate::heap_common::HeapHeader;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::heap_common::HeapHeader`
[INFO] [stdout]   --> crates/newgc-core/src/page_heap/evac.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 | use crate::heap_common::HeapHeader;
[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: `PAYLOAD_MASK` and `Tag`
[INFO] [stdout]   --> crates/newgc-core/src/page_heap/evac.rs:57:19
[INFO] [stdout]    |
[INFO] [stdout] 57 | use crate::word::{Tag, Word, PAYLOAD_MASK};
[INFO] [stdout]    |                   ^^^        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Tag`
[INFO] [stdout]   --> crates/newgc-core/src/page_heap/evac.rs:57:19
[INFO] [stdout]    |
[INFO] [stdout] 57 | use crate::word::{Tag, Word, PAYLOAD_MASK};
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::heap_common::HeapHeader`
[INFO] [stdout]   --> crates/newgc-core/src/page_heap/mark.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | use crate::heap_common::HeapHeader;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Tag`
[INFO] [stdout]   --> crates/newgc-core/src/page_heap/mark.rs:42:19
[INFO] [stdout]    |
[INFO] [stdout] 42 | use crate::word::{Tag, Word};
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::heap_common::HeapHeader`
[INFO] [stdout]   --> crates/newgc-core/src/page_heap/mark.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | use crate::heap_common::HeapHeader;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Tag`
[INFO] [stdout]   --> crates/newgc-core/src/page_heap/mark.rs:42:19
[INFO] [stdout]    |
[INFO] [stdout] 42 | use crate::word::{Tag, Word};
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Tag`
[INFO] [stdout]   --> crates/newgc-core/src/page_heap/pin.rs:48:19
[INFO] [stdout]    |
[INFO] [stdout] 48 | use crate::word::{Tag, Word};
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Tag`
[INFO] [stdout]   --> crates/newgc-core/src/page_heap/pin.rs:48:19
[INFO] [stdout]    |
[INFO] [stdout] 48 | use crate::word::{Tag, Word};
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `dest_gen` is never read
[INFO] [stdout]    --> crates/newgc-core/src/page_heap/evac.rs:271:5
[INFO] [stdout]     |
[INFO] [stdout] 268 | pub struct PageEvacuator<'a, L: HeapLayout> {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 271 |     dest_gen: Generation,
[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 `page_idx` and `reserved_cells` are never read
[INFO] [stdout]   --> crates/newgc-core/src/page_heap/mutator.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 74 | struct Tlab {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 82 |     page_idx: usize,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 83 |     /// Cells reserved at refill (for reconciling the unused tail).
[INFO] [stdout] 84 |     reserved_cells: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Tlab` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `commit_lock` is never read
[INFO] [stdout]    --> crates/newgc-core/src/page_heap/space.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout]  86 | pub struct PageHeap<L: HeapLayout> {
[INFO] [stdout]     |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 111 |     commit_lock: Mutex<()>,
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Boxed` is never constructed
[INFO] [stdout]    --> crates/newgc-core/src/page_heap/space.rs:270:5
[INFO] [stdout]     |
[INFO] [stdout] 265 | enum Backing {
[INFO] [stdout]     |      ------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 270 |     Boxed(Box<[u8]>),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking newgc-test-lisp v0.0.0 (/opt/rustwide/workdir/crates/newgc-test-lisp)
[INFO] [stdout] warning: unused imports: `Generation` and `HeapLayout`
[INFO] [stdout]   --> crates/newgc-test-lisp/src/eval.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout] 23 | use newgc_core::{Generation, HeapLayout, LispLayout, Mutator, Word};
[INFO] [stdout]    |                  ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `loom`
[INFO] [stdout]   --> crates/newgc-core/tests/loom_safepoint.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | #![cfg(loom)]
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: expected names are: `docsrs`, `feature`, and `test` and 33 more
[INFO] [stdout]    = help: consider using a Cargo feature instead
[INFO] [stdout]    = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]             [lints.rust]
[INFO] [stdout]             unexpected_cfgs = { level = "warn", check-cfg = ['cfg(loom)'] }
[INFO] [stdout]    = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(loom)");` to the top of the `build.rs`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Generation` and `HeapLayout`
[INFO] [stdout]   --> crates/newgc-test-lisp/src/eval.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout] 23 | use newgc_core::{Generation, HeapLayout, LispLayout, Mutator, Word};
[INFO] [stdout]    |                  ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pct` is never used
[INFO] [stdout]   --> crates/newgc-core/tests/torture_mt.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | impl Rng {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 92 |     fn pct(&mut self, n: u64) -> bool {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HeapLayout`
[INFO] [stdout]   --> crates/newgc-core/tests/workloads.rs:25:29
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Generation, HeapHeader, HeapLayout, HeapType, LispLayout, PageHeap,
[INFO] [stdout]    |                             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `acc` is never read
[INFO] [stdout]    --> crates/newgc-core/tests/cons_elision.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 157 |             acc = Word::from_ptr(p.as_ptr() as *const u8, Tag::Cons);
[INFO] [stdout]     |             -------------------------------------------------------- `acc` is overwritten here before the previous value is read
[INFO] [stdout] ...
[INFO] [stdout] 169 |         acc = Word::NIL;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HeapLayout`
[INFO] [stdout]   --> crates/newgc-core/tests/stochastic_workload.rs:36:29
[INFO] [stdout]    |
[INFO] [stdout] 36 |     Generation, HeapHeader, HeapLayout, HeapType, LispLayout, PAGE_SIZE_CELLS,
[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: `newgc_core::page_heap::evac::PageEvacuator`
[INFO] [stdout]  --> crates/newgc-core/tests/card_barrier.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use newgc_core::page_heap::evac::PageEvacuator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `dest_gen` is never read
[INFO] [stdout]    --> crates/newgc-core/src/page_heap/evac.rs:271:5
[INFO] [stdout]     |
[INFO] [stdout] 268 | pub struct PageEvacuator<'a, L: HeapLayout> {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 271 |     dest_gen: Generation,
[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 `page_idx` and `reserved_cells` are never read
[INFO] [stdout]   --> crates/newgc-core/src/page_heap/mutator.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 74 | struct Tlab {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 82 |     page_idx: usize,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 83 |     /// Cells reserved at refill (for reconciling the unused tail).
[INFO] [stdout] 84 |     reserved_cells: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Tlab` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `commit_lock` is never read
[INFO] [stdout]    --> crates/newgc-core/src/page_heap/space.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout]  86 | pub struct PageHeap<L: HeapLayout> {
[INFO] [stdout]     |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 111 |     commit_lock: Mutex<()>,
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Boxed` is never constructed
[INFO] [stdout]    --> crates/newgc-core/src/page_heap/space.rs:270:5
[INFO] [stdout]     |
[INFO] [stdout] 265 | enum Backing {
[INFO] [stdout]     |      ------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 270 |     Boxed(Box<[u8]>),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returned pointer of `as_ptr` call is never null, so checking it for null will always return false
[INFO] [stdout]    --> crates/newgc-core/src/page_heap/alloc.rs:631:18
[INFO] [stdout]     |
[INFO] [stdout] 631 |         assert!(!p.as_ptr().is_null());
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(useless_ptr_null_checks)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.63s
[INFO] running `Command { std: "docker" "inspect" "7f18c391ea14c75a29620bc32f3ad3c90916de8151954096269660e37d75f81e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f18c391ea14c75a29620bc32f3ad3c90916de8151954096269660e37d75f81e", kill_on_drop: false }`
[INFO] [stdout] 7f18c391ea14c75a29620bc32f3ad3c90916de8151954096269660e37d75f81e
