ICE: index out of bounds, instrument coverage

[matthiaskrgr]

auto-reduced (treereduce-rust):

use std::future::Future;

pub fn block_on<T>(fut: impl Future<Output = T>) -> T {}

async fn call_once(f: impl async FnOnce(DropMe)) {
    f(DropMe("world")).await;
}

struct DropMe(&'static str);

pub fn main() {
    block_on(async {
        let async_closure = async move |a: DropMe| {};
        call_once(async_closure).await;
    });
}

original:

#![feature(async_closure, noop_waker, async_fn_traits)]

use std::future::Future;
use std::pin::pin;
use std::task::*;

pub fn block_on<T>(fut: impl Future<Output = T>) -> T {
    let mut fut = pin!(fut);
    let ctx = &mut Context::from_waker(Waker::noop());

    loop {
        match fut.as_mut().poll(ctx) {
            Poll::Pending => {}
            Poll::Ready(t) => break t,
        }
    }
}

async fn call_once(f: impl async FnOnce(DropMe)) {
    f(DropMe("world")).await;
}

#[derive(Debug)]
struct DropMe(&'static str);

impl Drop for DropMe {
    fn drop(&mut self) {
        println!("{}", self.0);
    }
}

pub fn main() {
    block_on(async {
        let b = DropMe("hello");
        let async_closure = async move |a: DropMe| {
            println!("{a:?} {b:?}");
        };
        call_once(async_closure).await;
    });
}

Version information

rustc 1.83.0-nightly (888523978 2024-10-03)
binary: rustc
commit-hash: 8885239786c9efe5c6077de65536a5e092e34a55
commit-date: 2024-10-03
host: x86_64-unknown-linux-gnu
release: 1.83.0-nightly
LLVM version: 19.1.0

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc -Cinstrument-coverage --edition=2018

Program output

error[E0658]: async closures are unstable
 --> /tmp/icemaker_global_tempdir.oaNujPif49Om/rustc_testrunner_tmpdir_reporting.OG1eQwd5cy9L/mvce.rs:5:28
  |
5 | async fn call_once(f: impl async FnOnce(DropMe)) {
  |                            ^^^^^
  |
  = note: see issue #62290 <https://github.com/rust-lang/rust/issues/62290> for more information
  = help: add `#![feature(async_closure)]` to the crate attributes to enable
  = note: this compiler was built on 2024-10-03; consider upgrading it if it is out of date
  = help: to use an async block, remove the `||`: `async {`

error[E0658]: async closures are unstable
  --> /tmp/icemaker_global_tempdir.oaNujPif49Om/rustc_testrunner_tmpdir_reporting.OG1eQwd5cy9L/mvce.rs:13:29
   |
13 |         let async_closure = async move |a: DropMe| {};
   |                             ^^^^^
   |
   = note: see issue #62290 <https://github.com/rust-lang/rust/issues/62290> for more information
   = help: add `#![feature(async_closure)]` to the crate attributes to enable
   = note: this compiler was built on 2024-10-03; consider upgrading it if it is out of date
   = help: to use an async block, remove the `||`: `async {`

error[E0658]: use of unstable library feature 'async_closure'
 --> /tmp/icemaker_global_tempdir.oaNujPif49Om/rustc_testrunner_tmpdir_reporting.OG1eQwd5cy9L/mvce.rs:5:34
  |
5 | async fn call_once(f: impl async FnOnce(DropMe)) {
  |                                  ^^^^^^^^^^^^^^
  |
  = note: see issue #62290 <https://github.com/rust-lang/rust/issues/62290> for more information
  = help: add `#![feature(async_closure)]` to the crate attributes to enable
  = note: this compiler was built on 2024-10-03; consider upgrading it if it is out of date

error[E0308]: mismatched types
 --> /tmp/icemaker_global_tempdir.oaNujPif49Om/rustc_testrunner_tmpdir_reporting.OG1eQwd5cy9L/mvce.rs:3:53
  |
3 | pub fn block_on<T>(fut: impl Future<Output = T>) -> T {}
  |        -------- -                                   ^ expected type parameter `T`, found `()`
  |        |        |
  |        |        expected this type parameter
  |        implicitly returns `()` as its body has no tail or `return` expression
  |
  = note: expected type parameter `T`
                  found unit type `()`

warning: unused variable: `a`
  --> /tmp/icemaker_global_tempdir.oaNujPif49Om/rustc_testrunner_tmpdir_reporting.OG1eQwd5cy9L/mvce.rs:13:41
   |
13 |         let async_closure = async move |a: DropMe| {};
   |                                         ^ help: if this is intentional, prefix it with an underscore: `_a`
   |
   = note: `#[warn(unused_variables)]` on by default

thread 'rustc' panicked at /rustc/8885239786c9efe5c6077de65536a5e092e34a55/compiler/rustc_middle/src/hir/mod.rs:167:84:
index out of bounds: the len is 18 but the index is 18
stack backtrace:
   0:     0x7beaa312055a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hb592cf74724b425e
   1:     0x7beaa3803426 - core::fmt::write::hf5d6063860bea70f
   2:     0x7beaa49e0e51 - std::io::Write::write_fmt::hffd3de1a22689c3f
   3:     0x7beaa31203b2 - std::sys::backtrace::BacktraceLock::print::h63270fe5b69f528d
   4:     0x7beaa3122886 - std::panicking::default_hook::{{closure}}::heab8066707c891e2
   5:     0x7beaa31226d0 - std::panicking::default_hook::h04bff44e2827e0a1
   6:     0x7beaa21d718f - std[a04536816f5670be]::panicking::update_hook::<alloc[c3cd3301d2874f1]::boxed::Box<rustc_driver_impl[d8d06b747560f99c]::install_ice_hook::{closure#0}>>::{closure#0}
   7:     0x7beaa3122f98 - std::panicking::rust_panic_with_hook::h8c4b4462dd073994
   8:     0x7beaa3122d6a - std::panicking::begin_panic_handler::{{closure}}::h3e8c389e20c1d0de
   9:     0x7beaa3120a09 - std::sys::backtrace::__rust_end_short_backtrace::h8ff57cfb18e819fb
  10:     0x7beaa3122a2c - rust_begin_unwind
  11:     0x7bea9fec29e0 - core::panicking::panic_fmt::h1ebaebc26e6fd1b2
  12:     0x7beaa19291ab - core::panicking::panic_bounds_check::hc44d35339120f09a
  13:     0x7beaa3b2dd08 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::local_def_id_to_hir_id::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 8usize]>>
  14:     0x7beaa3b2d31b - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::VecCache<rustc_span[3db820fc671a7841]::def_id::LocalDefId, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  15:     0x7beaa3b2ce4f - rustc_query_impl[a29eb790b8655a40]::query_impl::local_def_id_to_hir_id::get_query_non_incr::__rust_end_short_backtrace
  16:     0x7beaa295ea8c - rustc_middle[5107f05ab9282e45]::query::plumbing::query_get_at::<rustc_query_system[fcc792b70dcbd9a8]::query::caches::VecCache<rustc_span[3db820fc671a7841]::def_id::LocalDefId, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 8usize]>>>
  17:     0x7beaa29e35f6 - rustc_mir_transform[d3e5830c4043327a]::coverage::query::coverage_attr_on
  18:     0x7beaa2c2d297 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::coverage_attr_on::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 1usize]>>
  19:     0x7beaa4207ba9 - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::VecCache<rustc_span[3db820fc671a7841]::def_id::LocalDefId, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  20:     0x7beaa2c367c7 - rustc_query_impl[a29eb790b8655a40]::query_impl::coverage_attr_on::get_query_non_incr::__rust_end_short_backtrace
  21:     0x7beaa295e8ff - rustc_middle[5107f05ab9282e45]::query::plumbing::query_get_at::<rustc_query_system[fcc792b70dcbd9a8]::query::caches::VecCache<rustc_span[3db820fc671a7841]::def_id::LocalDefId, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 1usize]>>>
  22:     0x7beaa29e35b6 - rustc_mir_transform[d3e5830c4043327a]::coverage::query::is_eligible_for_coverage
  23:     0x7beaa29e878e - <rustc_mir_transform[d3e5830c4043327a]::coverage::InstrumentCoverage as rustc_mir_transform[d3e5830c4043327a]::pass_manager::MirPass>::run_pass
  24:     0x7beaa0c88d94 - rustc_mir_transform[d3e5830c4043327a]::mir_promoted
  25:     0x7beaa3c72152 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::mir_promoted::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>
  26:     0x7beaa3c72421 - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::VecCache<rustc_span[3db820fc671a7841]::def_id::LocalDefId, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  27:     0x7beaa47ba350 - rustc_query_impl[a29eb790b8655a40]::query_impl::mir_promoted::get_query_non_incr::__rust_end_short_backtrace
  28:     0x7beaa4cc2c0d - rustc_middle[5107f05ab9282e45]::query::plumbing::query_get_at::<rustc_query_system[fcc792b70dcbd9a8]::query::caches::VecCache<rustc_span[3db820fc671a7841]::def_id::LocalDefId, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>>.cold
  29:     0x7beaa2a34aca - rustc_mir_transform[d3e5830c4043327a]::coroutine::mir_coroutine_witnesses
  30:     0x7beaa2c2d8b2 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::mir_coroutine_witnesses::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 8usize]>>
  31:     0x7beaa382f5ae - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefIdCache<rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  32:     0x7beaa2c35d0e - rustc_query_impl[a29eb790b8655a40]::query_impl::mir_coroutine_witnesses::get_query_non_incr::__rust_end_short_backtrace
  33:     0x7beaa40fe2f4 - rustc_mir_transform[d3e5830c4043327a]::mir_drops_elaborated_and_const_checked
  34:     0x7beaa40fd595 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 8usize]>>
  35:     0x7beaa3b2d0fa - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::VecCache<rustc_span[3db820fc671a7841]::def_id::LocalDefId, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  36:     0x7beaa3b2caa5 - rustc_query_impl[a29eb790b8655a40]::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
  37:     0x7beaa3a45b6a - rustc_mir_transform[d3e5830c4043327a]::optimized_mir
  38:     0x7beaa3a442a1 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 8usize]>>
  39:     0x7beaa382f5ae - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefIdCache<rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  40:     0x7beaa382eb5f - rustc_query_impl[a29eb790b8655a40]::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
  41:     0x7beaa3e29f01 - rustc_middle[5107f05ab9282e45]::query::plumbing::query_get_at::<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefIdCache<rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 8usize]>>>
  42:     0x7beaa2848a5e - <rustc_middle[5107f05ab9282e45]::ty::context::TyCtxt>::coroutine_layout
  43:     0x7beaa3ec8ad9 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of_uncached
  44:     0x7beaa3eb9646 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of
  45:     0x7beaa3eb95d1 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>
  46:     0x7beaa3eb884d - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefaultCache<rustc_middle[5107f05ab9282e45]::ty::ParamEnvAnd<rustc_middle[5107f05ab9282e45]::ty::Ty>, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  47:     0x7beaa3eb84e7 - rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  48:     0x7beaa3eb763c - <core[cb6fe1446f4e495e]::iter::adapters::GenericShunt<core[cb6fe1446f4e495e]::iter::adapters::by_ref_sized::ByRefSized<core[cb6fe1446f4e495e]::iter::adapters::map::Map<core[cb6fe1446f4e495e]::slice::iter::Iter<rustc_middle[5107f05ab9282e45]::ty::VariantDef>, rustc_ty_utils[40b1ed103802e44]::layout::layout_of_uncached::{closure#13}>>, core[cb6fe1446f4e495e]::result::Result<core[cb6fe1446f4e495e]::convert::Infallible, &rustc_middle[5107f05ab9282e45]::ty::layout::LayoutError>> as core[cb6fe1446f4e495e]::iter::traits::iterator::Iterator>::next
  49:     0x7beaa3ebe0d0 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of_uncached
  50:     0x7beaa3eb9646 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of
  51:     0x7beaa3eb95d1 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>
  52:     0x7beaa3eb884d - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefaultCache<rustc_middle[5107f05ab9282e45]::ty::ParamEnvAnd<rustc_middle[5107f05ab9282e45]::ty::Ty>, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  53:     0x7beaa3eb84e7 - rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  54:     0x7beaa3eb79bd - <core[cb6fe1446f4e495e]::iter::adapters::GenericShunt<core[cb6fe1446f4e495e]::iter::adapters::by_ref_sized::ByRefSized<core[cb6fe1446f4e495e]::iter::adapters::map::Map<core[cb6fe1446f4e495e]::slice::iter::Iter<rustc_middle[5107f05ab9282e45]::ty::VariantDef>, rustc_ty_utils[40b1ed103802e44]::layout::layout_of_uncached::{closure#13}>>, core[cb6fe1446f4e495e]::result::Result<core[cb6fe1446f4e495e]::convert::Infallible, &rustc_middle[5107f05ab9282e45]::ty::layout::LayoutError>> as core[cb6fe1446f4e495e]::iter::traits::iterator::Iterator>::next
  55:     0x7beaa3ebe0d0 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of_uncached
  56:     0x7beaa3eb9646 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of
  57:     0x7beaa3eb95d1 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>
  58:     0x7beaa3eb884d - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefaultCache<rustc_middle[5107f05ab9282e45]::ty::ParamEnvAnd<rustc_middle[5107f05ab9282e45]::ty::Ty>, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  59:     0x7beaa3eb84e7 - rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  60:     0x7beaa3eb511d - rustc_middle[5107f05ab9282e45]::query::plumbing::query_get_at::<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefaultCache<rustc_middle[5107f05ab9282e45]::ty::ParamEnvAnd<rustc_middle[5107f05ab9282e45]::ty::Ty>, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>>
  61:     0x7beaa3eb99f2 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of
  62:     0x7beaa3eb95d1 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>
  63:     0x7beaa3eb884d - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefaultCache<rustc_middle[5107f05ab9282e45]::ty::ParamEnvAnd<rustc_middle[5107f05ab9282e45]::ty::Ty>, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  64:     0x7beaa3eb84e7 - rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  65:     0x7beaa3eb511d - rustc_middle[5107f05ab9282e45]::query::plumbing::query_get_at::<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefaultCache<rustc_middle[5107f05ab9282e45]::ty::ParamEnvAnd<rustc_middle[5107f05ab9282e45]::ty::Ty>, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>>
  66:     0x7beaa309b19a - <rustc_middle[5107f05ab9282e45]::ty::layout::LayoutCx as rustc_middle[5107f05ab9282e45]::ty::layout::LayoutOf>::spanned_layout_of
  67:     0x7beaa308717e - <core[cb6fe1446f4e495e]::iter::adapters::GenericShunt<core[cb6fe1446f4e495e]::iter::adapters::by_ref_sized::ByRefSized<core[cb6fe1446f4e495e]::iter::adapters::chain::Chain<core[cb6fe1446f4e495e]::iter::adapters::chain::Chain<core[cb6fe1446f4e495e]::iter::adapters::map::Map<core[cb6fe1446f4e495e]::iter::adapters::copied::Copied<core[cb6fe1446f4e495e]::slice::iter::Iter<rustc_middle[5107f05ab9282e45]::ty::Ty>>, rustc_ty_utils[40b1ed103802e44]::layout::coroutine_layout::{closure#2}>, core[cb6fe1446f4e495e]::iter::sources::once::Once<core[cb6fe1446f4e495e]::result::Result<rustc_target[b87216030bef1d77]::abi::TyAndLayout<rustc_middle[5107f05ab9282e45]::ty::Ty>, &rustc_middle[5107f05ab9282e45]::ty::layout::LayoutError>>>, core[cb6fe1446f4e495e]::iter::adapters::map::Map<rustc_index[bfdec4fad9c39491]::bit_set::BitIter<rustc_middle[5107f05ab9282e45]::mir::query::CoroutineSavedLocal>, rustc_ty_utils[40b1ed103802e44]::layout::coroutine_layout::{closure#1}>>>, core[cb6fe1446f4e495e]::result::Result<core[cb6fe1446f4e495e]::convert::Infallible, &rustc_middle[5107f05ab9282e45]::ty::layout::LayoutError>> as core[cb6fe1446f4e495e]::iter::traits::iterator::Iterator>::next
  68:     0x7beaa3ec9199 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of_uncached
  69:     0x7beaa3eb9646 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of
  70:     0x7beaa3eb95d1 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>
  71:     0x7beaa3eb884d - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefaultCache<rustc_middle[5107f05ab9282e45]::ty::ParamEnvAnd<rustc_middle[5107f05ab9282e45]::ty::Ty>, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  72:     0x7beaa3eb84e7 - rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  73:     0x7beaa3eb763c - <core[cb6fe1446f4e495e]::iter::adapters::GenericShunt<core[cb6fe1446f4e495e]::iter::adapters::by_ref_sized::ByRefSized<core[cb6fe1446f4e495e]::iter::adapters::map::Map<core[cb6fe1446f4e495e]::slice::iter::Iter<rustc_middle[5107f05ab9282e45]::ty::VariantDef>, rustc_ty_utils[40b1ed103802e44]::layout::layout_of_uncached::{closure#13}>>, core[cb6fe1446f4e495e]::result::Result<core[cb6fe1446f4e495e]::convert::Infallible, &rustc_middle[5107f05ab9282e45]::ty::layout::LayoutError>> as core[cb6fe1446f4e495e]::iter::traits::iterator::Iterator>::next
  74:     0x7beaa3ebe0d0 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of_uncached
  75:     0x7beaa3eb9646 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of
  76:     0x7beaa3eb95d1 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>
  77:     0x7beaa3eb884d - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefaultCache<rustc_middle[5107f05ab9282e45]::ty::ParamEnvAnd<rustc_middle[5107f05ab9282e45]::ty::Ty>, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  78:     0x7beaa3eb84e7 - rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  79:     0x7beaa3eb79bd - <core[cb6fe1446f4e495e]::iter::adapters::GenericShunt<core[cb6fe1446f4e495e]::iter::adapters::by_ref_sized::ByRefSized<core[cb6fe1446f4e495e]::iter::adapters::map::Map<core[cb6fe1446f4e495e]::slice::iter::Iter<rustc_middle[5107f05ab9282e45]::ty::VariantDef>, rustc_ty_utils[40b1ed103802e44]::layout::layout_of_uncached::{closure#13}>>, core[cb6fe1446f4e495e]::result::Result<core[cb6fe1446f4e495e]::convert::Infallible, &rustc_middle[5107f05ab9282e45]::ty::layout::LayoutError>> as core[cb6fe1446f4e495e]::iter::traits::iterator::Iterator>::next
  80:     0x7beaa3ebe0d0 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of_uncached
  81:     0x7beaa3eb9646 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of
  82:     0x7beaa3eb95d1 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>
  83:     0x7beaa3eb884d - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefaultCache<rustc_middle[5107f05ab9282e45]::ty::ParamEnvAnd<rustc_middle[5107f05ab9282e45]::ty::Ty>, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  84:     0x7beaa3eb84e7 - rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  85:     0x7beaa3eb511d - rustc_middle[5107f05ab9282e45]::query::plumbing::query_get_at::<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefaultCache<rustc_middle[5107f05ab9282e45]::ty::ParamEnvAnd<rustc_middle[5107f05ab9282e45]::ty::Ty>, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>>
  86:     0x7beaa309b19a - <rustc_middle[5107f05ab9282e45]::ty::layout::LayoutCx as rustc_middle[5107f05ab9282e45]::ty::layout::LayoutOf>::spanned_layout_of
  87:     0x7beaa308717e - <core[cb6fe1446f4e495e]::iter::adapters::GenericShunt<core[cb6fe1446f4e495e]::iter::adapters::by_ref_sized::ByRefSized<core[cb6fe1446f4e495e]::iter::adapters::chain::Chain<core[cb6fe1446f4e495e]::iter::adapters::chain::Chain<core[cb6fe1446f4e495e]::iter::adapters::map::Map<core[cb6fe1446f4e495e]::iter::adapters::copied::Copied<core[cb6fe1446f4e495e]::slice::iter::Iter<rustc_middle[5107f05ab9282e45]::ty::Ty>>, rustc_ty_utils[40b1ed103802e44]::layout::coroutine_layout::{closure#2}>, core[cb6fe1446f4e495e]::iter::sources::once::Once<core[cb6fe1446f4e495e]::result::Result<rustc_target[b87216030bef1d77]::abi::TyAndLayout<rustc_middle[5107f05ab9282e45]::ty::Ty>, &rustc_middle[5107f05ab9282e45]::ty::layout::LayoutError>>>, core[cb6fe1446f4e495e]::iter::adapters::map::Map<rustc_index[bfdec4fad9c39491]::bit_set::BitIter<rustc_middle[5107f05ab9282e45]::mir::query::CoroutineSavedLocal>, rustc_ty_utils[40b1ed103802e44]::layout::coroutine_layout::{closure#1}>>>, core[cb6fe1446f4e495e]::result::Result<core[cb6fe1446f4e495e]::convert::Infallible, &rustc_middle[5107f05ab9282e45]::ty::layout::LayoutError>> as core[cb6fe1446f4e495e]::iter::traits::iterator::Iterator>::next
  88:     0x7beaa3ec9199 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of_uncached
  89:     0x7beaa3eb9646 - rustc_ty_utils[40b1ed103802e44]::layout::layout_of
  90:     0x7beaa3eb95d1 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>
  91:     0x7beaa3eb884d - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::DefaultCache<rustc_middle[5107f05ab9282e45]::ty::ParamEnvAnd<rustc_middle[5107f05ab9282e45]::ty::Ty>, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  92:     0x7beaa3eb84e7 - rustc_query_impl[a29eb790b8655a40]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  93:     0x7beaa0dcd2ad - <rustc_mir_transform[d3e5830c4043327a]::known_panics_lint::KnownPanicsLint as rustc_mir_transform[d3e5830c4043327a]::pass_manager::MirLint>::run_lint
  94:     0x7beaa3806acc - rustc_mir_transform[d3e5830c4043327a]::run_analysis_to_runtime_passes
  95:     0x7beaa40fdc52 - rustc_mir_transform[d3e5830c4043327a]::mir_drops_elaborated_and_const_checked
  96:     0x7beaa40fd595 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 8usize]>>
  97:     0x7beaa3b2d0fa - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::VecCache<rustc_span[3db820fc671a7841]::def_id::LocalDefId, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
  98:     0x7beaa3b2caa5 - rustc_query_impl[a29eb790b8655a40]::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
  99:     0x7beaa3b26cd2 - rustc_interface[ec6f4c50e1aefefe]::passes::run_required_analyses
 100:     0x7beaa463d41e - rustc_interface[ec6f4c50e1aefefe]::passes::analysis
 101:     0x7beaa463d3f1 - rustc_query_impl[a29eb790b8655a40]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a29eb790b8655a40]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 1usize]>>
 102:     0x7beaa46d772e - rustc_query_system[fcc792b70dcbd9a8]::query::plumbing::try_execute_query::<rustc_query_impl[a29eb790b8655a40]::DynamicConfig<rustc_query_system[fcc792b70dcbd9a8]::query::caches::SingleCache<rustc_middle[5107f05ab9282e45]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[a29eb790b8655a40]::plumbing::QueryCtxt, false>
 103:     0x7beaa46d740f - rustc_query_impl[a29eb790b8655a40]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
 104:     0x7beaa454051e - rustc_interface[ec6f4c50e1aefefe]::interface::run_compiler::<core[cb6fe1446f4e495e]::result::Result<(), rustc_span[3db820fc671a7841]::ErrorGuaranteed>, rustc_driver_impl[d8d06b747560f99c]::run_compiler::{closure#0}>::{closure#1}
 105:     0x7beaa4624810 - std[a04536816f5670be]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[ec6f4c50e1aefefe]::util::run_in_thread_with_globals<rustc_interface[ec6f4c50e1aefefe]::util::run_in_thread_pool_with_globals<rustc_interface[ec6f4c50e1aefefe]::interface::run_compiler<core[cb6fe1446f4e495e]::result::Result<(), rustc_span[3db820fc671a7841]::ErrorGuaranteed>, rustc_driver_impl[d8d06b747560f99c]::run_compiler::{closure#0}>::{closure#1}, core[cb6fe1446f4e495e]::result::Result<(), rustc_span[3db820fc671a7841]::ErrorGuaranteed>>::{closure#0}, core[cb6fe1446f4e495e]::result::Result<(), rustc_span[3db820fc671a7841]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[cb6fe1446f4e495e]::result::Result<(), rustc_span[3db820fc671a7841]::ErrorGuaranteed>>
 106:     0x7beaa4624ed7 - <<std[a04536816f5670be]::thread::Builder>::spawn_unchecked_<rustc_interface[ec6f4c50e1aefefe]::util::run_in_thread_with_globals<rustc_interface[ec6f4c50e1aefefe]::util::run_in_thread_pool_with_globals<rustc_interface[ec6f4c50e1aefefe]::interface::run_compiler<core[cb6fe1446f4e495e]::result::Result<(), rustc_span[3db820fc671a7841]::ErrorGuaranteed>, rustc_driver_impl[d8d06b747560f99c]::run_compiler::{closure#0}>::{closure#1}, core[cb6fe1446f4e495e]::result::Result<(), rustc_span[3db820fc671a7841]::ErrorGuaranteed>>::{closure#0}, core[cb6fe1446f4e495e]::result::Result<(), rustc_span[3db820fc671a7841]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[cb6fe1446f4e495e]::result::Result<(), rustc_span[3db820fc671a7841]::ErrorGuaranteed>>::{closure#1} as core[cb6fe1446f4e495e]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
 107:     0x7beaa4625dc1 - std::sys::pal::unix::thread::Thread::new::thread_start::heca97faccc80f502
 108:     0x7bea9eaa339d - <unknown>
 109:     0x7bea9eb2849c - <unknown>
 110:                0x0 - <unknown>

error: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: please make sure that you have updated to the latest nightly

note: rustc 1.83.0-nightly (888523978 2024-10-03) running on x86_64-unknown-linux-gnu

note: compiler flags: -C instrument-coverage -Z dump-mir-dir=dir

query stack during panic:
#0 [local_def_id_to_hir_id] getting HIR ID of `main::{closure#0}::{closure#0}::{closure#1}`
#1 [coverage_attr_on] checking for `#[coverage(..)]` on `main::{closure#0}::{closure#0}::{closure#1}`
end of query stack
error: aborting due to 4 previous errors; 1 warning emitted

Some errors have detailed explanations: E0308, E0658.
For more information about an error, try `rustc --explain E0308`.

@rustbot label +F-async_closure +F-noop_waker +F-async_fn_traits

[traviscross]

@rustbot labels -needs-triage +AsyncAwait-Triaged

Interesting, as always, @matthiaskrgr. Thanks for the report.

[ranger-ross]

Bisected to nightly-2024-09-18,

Regression in 41a3e06 from #130201

[traviscross]

cc @compiler-errors given bisection.

[compiler-errors]

I'll look

[compiler-errors]

side note, @traviscross: in async triage, if you're gonna remove the needs-triage label please consider adding the relevant F- labels too