ICE when using async closures

[dankmeme01]

Code

#![feature(async_closure, noop_waker)]

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

async fn empty() {}

pub async fn bug<F: async FnOnce()>(f: F) {
    f().await;
}

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,
        }
    }
}

fn main() {
    block_on(bug(async || empty().await));
}

Meta

rustc --version --verbose:

rustc 1.83.0-nightly (adf8d168a 2024-09-08)
binary: rustc
commit-hash: adf8d168af9334a8bf940824fcf4207d01e05ae5
commit-date: 2024-09-08
host: x86_64-unknown-linux-gnu
release: 1.83.0-nightly
LLVM version: 19.1.0

(in case that's helpful, this does not happen on nightly 2024-09-07 and earlier, seems to be a very recent bug)

Error output

<output>

Backtrace

``` thread 'rustc' panicked at compiler/rustc_mir_transform/src/coroutine/by_move_body.rs:89:48: attempted to read from stolen value: rustc_middle::mir::Body stack backtrace: 0: 0x795f0488dfda - ::fmt::hf888407e64bc1c93 1: 0x795f05003897 - core::fmt::write::heaa3eab75bc1f5b4 2: 0x795f060092b3 - std::io::Write::write_fmt::h46beb78ede5e8850 3: 0x795f0488de32 - std::sys::backtrace::BacktraceLock::print::h41d156c5cb4b3844 4: 0x795f048905b1 - std::panicking::default_hook::{{closure}}::h62c797e9ef118691 5: 0x795f048903e4 - std::panicking::default_hook::hf91cfc3c704e1f33 6: 0x795f039a1b5f - std[7b565ee1a0d64e15]::panicking::update_hook::>::{closure#0} 7: 0x795f04890cd8 - std::panicking::rust_panic_with_hook::h60285247abe3a96f 8: 0x795f04890aa7 - std::panicking::begin_panic_handler::{{closure}}::hefa8b30c82997685 9: 0x795f0488e489 - std::sys::backtrace::__rust_end_short_backtrace::he2de9f061741821e 10: 0x795f04890774 - rust_begin_unwind 11: 0x795f01692e93 - core::panicking::panic_fmt::h61fd87267925ac0c 12: 0x795f04127c9c - >::borrow 13: 0x795f04172602 - rustc_mir_transform[6ea6579683b71711]::coroutine::by_move_body::coroutine_by_move_body_def_id 14: 0x795f043d5edc - rustc_query_impl[f8244974338721dd]::plumbing::__rust_begin_short_backtrace::> 15: 0x795f050217f8 - rustc_query_system[9ce622dd9f5d31ac]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[f8244974338721dd]::plumbing::QueryCtxt, false> 16: 0x795f043e39ae - rustc_query_impl[f8244974338721dd]::query_impl::coroutine_by_move_body_def_id::get_query_non_incr::__rust_end_short_backtrace 17: 0x795f05023bce - rustc_middle[af4baac0558fc493]::query::plumbing::query_get_at::>> 18: 0x795f024c2c0a - rustc_mir_transform[6ea6579683b71711]::validate::validate_types 19: 0x795f02495984 - ::run_pass 20: 0x795f0500bbe4 - rustc_mir_transform[6ea6579683b71711]::pass_manager::run_passes_inner 21: 0x795f057c358c - rustc_mir_transform[6ea6579683b71711]::shim::make_shim 22: 0x795f057c252f - rustc_query_impl[f8244974338721dd]::plumbing::__rust_begin_short_backtrace::> 23: 0x795f057c24e3 - >::call_once 24: 0x795f057c198f - rustc_query_system[9ce622dd9f5d31ac]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[f8244974338721dd]::plumbing::QueryCtxt, false> 25: 0x795f057c16f9 - rustc_query_impl[f8244974338721dd]::query_impl::mir_shims::get_query_non_incr::__rust_end_short_backtrace 26: 0x795f0194adeb - ::instance_mir 27: 0x795f05c4e19a - rustc_monomorphize[e7c91b7ff77211dc]::collector::collect_items_rec::{closure#0} 28: 0x795f05c4c2e3 - rustc_monomorphize[e7c91b7ff77211dc]::collector::collect_items_rec 29: 0x795f05c4ca3c - rustc_monomorphize[e7c91b7ff77211dc]::collector::collect_items_rec 30: 0x795f05c4ca3c - rustc_monomorphize[e7c91b7ff77211dc]::collector::collect_items_rec 31: 0x795f05c4ca3c - rustc_monomorphize[e7c91b7ff77211dc]::collector::collect_items_rec 32: 0x795f05526ed8 - rustc_monomorphize[e7c91b7ff77211dc]::partitioning::collect_and_partition_mono_items 33: 0x795f05f99e64 - rustc_query_impl[f8244974338721dd]::plumbing::__rust_begin_short_backtrace::> 34: 0x795f05f99e49 - >::call_once 35: 0x795f05f99a09 - rustc_query_system[9ce622dd9f5d31ac]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[f8244974338721dd]::plumbing::QueryCtxt, false> 36: 0x795f05f99721 - rustc_query_impl[f8244974338721dd]::query_impl::collect_and_partition_mono_items::get_query_non_incr::__rust_end_short_backtrace 37: 0x795f05fb6941 - ::codegen_crate 38: 0x795f061795f0 - ::codegen_and_build_linker 39: 0x795f05dbb869 - rustc_interface[46caefacee1b6b0a]::interface::run_compiler::, rustc_driver_impl[64b07e0215a8a630]::run_compiler::{closure#0}>::{closure#1} 40: 0x795f05e792d0 - std[7b565ee1a0d64e15]::sys::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl[64b07e0215a8a630]::run_compiler::{closure#0}>::{closure#1}, core[56af5a49d14fc234]::result::Result<(), rustc_span[a76600d062719b04]::ErrorGuaranteed>>::{closure#0}, core[56af5a49d14fc234]::result::Result<(), rustc_span[a76600d062719b04]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[56af5a49d14fc234]::result::Result<(), rustc_span[a76600d062719b04]::ErrorGuaranteed>> 41: 0x795f05e7993a - <::spawn_unchecked_, rustc_driver_impl[64b07e0215a8a630]::run_compiler::{closure#0}>::{closure#1}, core[56af5a49d14fc234]::result::Result<(), rustc_span[a76600d062719b04]::ErrorGuaranteed>>::{closure#0}, core[56af5a49d14fc234]::result::Result<(), rustc_span[a76600d062719b04]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[56af5a49d14fc234]::result::Result<(), rustc_span[a76600d062719b04]::ErrorGuaranteed>>::{closure#1} as core[56af5a49d14fc234]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 42: 0x795f05e79d2b - std::sys::pal::unix::thread::Thread::new::thread_start::h5351454212f92e4a 43: 0x795f075d839d - 44: 0x795f0765d49c - 45: 0x0 - 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: please attach the file at `/home/dankpc/programming/rust/wust-ice/rustc-ice-2024-09-09T18_33_37-110975.txt` to your bug report query stack during panic: #0 [coroutine_by_move_body_def_id] looking up the coroutine by-move body for `main::{closure#0}::{closure#0}` #1 [mir_shims] generating MIR shim for `core::ptr::drop_in_place` #2 [collect_and_partition_mono_items] collect_and_partition_mono_items end of query stack ```

rustc-ice-2024-09-09T18_33_37-110975.txt

[kpreid]

Different repro for probably the same bug, derived from my own project:

#![feature(async_closure)]

use std::future::Future;

pub fn do_thing<F, Fut>(func: F) -> Box<dyn Future<Output = ()> + Send + 'static>
where
    F: FnOnce() -> Fut,
    Fut: Future<Output = ()> + 'static + Send,
{
    Box::new(func())
}

fn main() {
    do_thing(async move || {
        async {}.await;
    });
}

While reducing, I also got two different errors:

error: internal compiler error: compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs:447:13: debuginfo: Trying to create type name for unexpected type: CoroutineWitness(DefId(0:5 ~ all_is_cubes[7315]::main::{closure#0}::{closure#0}), [])

error: internal compiler error: compiler/rustc_middle/src/query/plumbing.rs:664:5: `tcx.coroutine_by_move_body_def_id(DefId(100:150 ~ all_is_cubes_desktop[2a71]::startup::inner_main::{closure#0}::{closure#0}))` unsupported by its crate; perhaps the `coroutine_by_move_body_def_id` query was never assigned a provider function

It was also sensitive to whether the parts of the code are in different crates or not.