ICE with incremental compilation in async code #93584
Description
I couldn't figure out how to minimize the code itself, but the exact same crate compiles successfully with incremental compilation disabled (by setting CARGO_INCREMENTAL=0) and fails with incremental compilation enabled. Running cargo clean also gets incremental compilation working again
Code
This looked like the function originally identified in the stack trace:
use camino::Utf8PathBuf; use futures::prelude::*; use miette::{IntoDiagnostic, WrapErr}; use tokio::sync::mpsc; use tracing::{debug, trace, error, info, instrument}; use evdev_async::{AsyncDevice, InputEvent, KeyEvent}; use crate::{supervisor::Shutdown, dispatcher::Event}; #[instrument(skip(stop))] pub async fn watch(path: Utf8PathBuf, dispatch_tx: mpsc::Sender<Event>, mut stop: Shutdown) -> miette::Result<()> { let mut device = AsyncDevice::new(&path) .into_diagnostic() .wrap_err_with(|| format!("could not open evdev device {}", path))?; info!(%path, "Watching input device"); loop { tokio::select! { _ = stop.shutdown() => { debug!("Shutting down watcher loop"); break; }, event = device.next() => { match event { Some(Ok(ev)) => { let event = InputEvent::from(ev); trace!(?event, "Received input event"); if let InputEvent::Key(ev) = event { let dispatch_event = match ev { KeyEvent::Press(code) => Event::KeyPress(code), KeyEvent::Release(code) => Event::KeyRelease(code), }; dispatch_tx.send(dispatch_event).await .into_diagnostic() .wrap_err("dispatcher closed")?; } }, Some(Err(err)) => { error!(?err, "Failure reading input events"); }, None => { info!("Input device has closed"); break; }, } } } } Ok(()) }Meta
rustc --version --verbose:
rustc 1.59.0-nightly (83b15bfe1 2021-12-28) binary: rustc commit-hash: 83b15bfe1c15f325bc186ebfe3691b729ed59f2b commit-date: 2021-12-28 host: x86_64-unknown-linux-gnu release: 1.59.0-nightly LLVM version: 13.0.0 Error output
Compiling hotkey-daemon v0.1.0 (/home/ben/src/evhotkeyd/hotkey-daemon) warning: associated function is never used: `is_shutdown` --> hotkey-daemon/src/supervisor.rs:197:12 | 197 | pub fn is_shutdown(&self) -> bool { | ^^^^^^^^^^^ | = note: `#[warn(dead_code)]` on by default warning: `hotkey-daemon` (lib) generated 1 warning thread 'rustc' panicked at 'no entry found for key', compiler/rustc_metadata/src/rmeta/decoder.rs:1627:13 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace error: internal compiler error: unexpected panic note: 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: rustc 1.59.0-nightly (83b15bfe1 2021-12-28) running on x86_64-unknown-linux-gnu note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type bin note: some of the compiler flags provided by cargo are hidden query stack during panic: #0 [codegen_fulfill_obligation] checking if `core::future::into_future::IntoFuture` fulfills its obligations #1 [resolve_instance] resolving instance `<tokio::future::poll_fn::PollFn<[closure@hotkey_daemon::device_watcher::watch::{closure#0}::{closure#0}::{closure#1}]> as core::future::into_future::IntoFuture>::into_future` end of query stack error: could not compile `hotkey-daemon` Backtrace
thread 'rustc' panicked at 'no entry found for key', compiler/rustc_metadata/src/rmeta/decoder.rs:1627:13 stack backtrace: 0: rust_begin_unwind at /rustc/83b15bfe1c15f325bc186ebfe3691b729ed59f2b/library/std/src/panicking.rs:498:5 1: core::panicking::panic_fmt at /rustc/83b15bfe1c15f325bc186ebfe3691b729ed59f2b/library/core/src/panicking.rs:107:14 2: core::panicking::panic_display at /rustc/83b15bfe1c15f325bc186ebfe3691b729ed59f2b/library/core/src/panicking.rs:63:5 3: core::panicking::panic_str at /rustc/83b15bfe1c15f325bc186ebfe3691b729ed59f2b/library/core/src/panicking.rs:55:5 4: core::option::expect_failed at /rustc/83b15bfe1c15f325bc186ebfe3691b729ed59f2b/library/core/src/option.rs:1821:5 5: <rustc_metadata::creader::CStore as rustc_session::cstore::CrateStore>::expn_hash_to_expn_id 6: <rustc_span::hygiene::ExpnId as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 7: <rustc_span::hygiene::SyntaxContextData as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 8: <rustc_query_impl::on_disk_cache::CacheDecoder as rustc_middle::ty::codec::TyDecoder>::with_position::<<rustc_span::hygiene::SyntaxContext as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}::{closure#0}, core::result::Result<rustc_span::hygiene::SyntaxContextData, alloc::string::String>> 9: <rustc_span::span_encoding::Span as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 10: <rustc_middle::ty::VariantDef as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 11: <rustc_query_impl::on_disk_cache::CacheDecoder as rustc_serialize::serialize::Decoder>::read_seq::<alloc::vec::Vec<rustc_middle::ty::VariantDef>, <alloc::vec::Vec<rustc_middle::ty::VariantDef> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}> 12: <rustc_middle::ty::adt::AdtDef as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 13: <rustc_middle::ty::sty::TyKind as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 14: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 15: <core::result::Result<rustc_middle::ty::subst::GenericArg, alloc::string::String> as rustc_middle::ty::context::InternIteratorElement<rustc_middle::ty::subst::GenericArg, &rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg>>>::intern_with::<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, <rustc_middle::ty::context::TyCtxt>::mk_substs<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>>::{closure#0}> 16: <rustc_middle::ty::sty::TyKind as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 17: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 18: <core::result::Result<&rustc_middle::ty::TyS, alloc::string::String> as rustc_middle::ty::context::InternIteratorElement<&rustc_middle::ty::TyS, &rustc_middle::ty::list::List<&rustc_middle::ty::TyS>>>::intern_with::<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <rustc_middle::ty::list::List<&rustc_middle::ty::TyS> as rustc_middle::ty::codec::RefDecodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, <rustc_middle::ty::context::TyCtxt>::mk_type_list<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <rustc_middle::ty::list::List<&rustc_middle::ty::TyS> as rustc_middle::ty::codec::RefDecodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>>::{closure#0}> 19: <rustc_middle::ty::list::List<&rustc_middle::ty::TyS> as rustc_middle::ty::codec::RefDecodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 20: <rustc_middle::ty::sty::Binder<rustc_middle::ty::sty::FnSig> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 21: <rustc_middle::ty::sty::TyKind as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 22: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 23: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 24: <smallvec::SmallVec<[rustc_middle::ty::subst::GenericArg; 8]> as core::iter::traits::collect::Extend<rustc_middle::ty::subst::GenericArg>>::extend::<core::iter::adapters::ResultShunt<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, alloc::string::String>> 25: <core::result::Result<rustc_middle::ty::subst::GenericArg, alloc::string::String> as rustc_middle::ty::context::InternIteratorElement<rustc_middle::ty::subst::GenericArg, &rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg>>>::intern_with::<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, <rustc_middle::ty::context::TyCtxt>::mk_substs<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>>::{closure#0}> 26: <rustc_middle::ty::sty::TyKind as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 27: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 28: <core::result::Result<rustc_middle::ty::subst::GenericArg, alloc::string::String> as rustc_middle::ty::context::InternIteratorElement<rustc_middle::ty::subst::GenericArg, &rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg>>>::intern_with::<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>, <rustc_middle::ty::context::TyCtxt>::mk_substs<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>>::{closure#0}> 29: <rustc_middle::ty::sty::TyKind as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 30: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 31: <&rustc_middle::ty::TyS as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 32: <rustc_middle::ty::context::TyCtxt>::mk_substs::<core::iter::adapters::map::Map<core::ops::range::Range<usize>, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode::{closure#0}>> 33: <rustc_middle::traits::ImplSource<()> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 34: <core::result::Result<rustc_middle::traits::ImplSource<()>, rustc_errors::ErrorReported> as rustc_serialize::serialize::Decodable<rustc_query_impl::on_disk_cache::CacheDecoder>>::decode 35: <rustc_query_impl::on_disk_cache::OnDiskCache>::try_load_query_result::<core::result::Result<rustc_middle::traits::ImplSource<()>, rustc_errors::ErrorReported>> 36: <<rustc_query_impl::queries::codegen_fulfill_obligation as rustc_query_system::query::config::QueryDescription<rustc_query_impl::plumbing::QueryCtxt>>::TRY_LOAD_FROM_DISK::{closure#0} as core::ops::function::FnOnce<(rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::dep_graph::serialized::SerializedDepNodeIndex)>>::call_once 37: rustc_query_system::query::plumbing::try_load_from_disk_and_cache_in_memory::<rustc_query_impl::plumbing::QueryCtxt, (rustc_middle::ty::ParamEnv, rustc_middle::ty::sty::Binder<rustc_middle::ty::sty::TraitRef>), core::result::Result<rustc_middle::traits::ImplSource<()>, rustc_errors::ErrorReported>> 38: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(rustc_middle::ty::ParamEnv, rustc_middle::ty::sty::Binder<rustc_middle::ty::sty::TraitRef>), core::result::Result<rustc_middle::traits::ImplSource<()>, rustc_errors::ErrorReported>>> 39: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::codegen_fulfill_obligation 40: rustc_ty_utils::instance::inner_resolve_instance 41: rustc_ty_utils::instance::resolve_instance 42: rustc_query_system::query::plumbing::try_load_from_disk_and_cache_in_memory::<rustc_query_impl::plumbing::QueryCtxt, rustc_middle::ty::ParamEnvAnd<(rustc_span::def_id::DefId, &rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg>)>, core::result::Result<core::option::Option<rustc_middle::ty::instance::Instance>, rustc_errors::ErrorReported>> 43: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::resolve_instance, rustc_query_impl::plumbing::QueryCtxt> 44: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::resolve_instance 45: <rustc_middle::ty::instance::Instance>::resolve 46: rustc_monomorphize::collector::collect_neighbours 47: rustc_monomorphize::collector::collect_items_rec 48: rustc_monomorphize::collector::collect_items_rec 49: rustc_monomorphize::collector::collect_items_rec 50: rustc_monomorphize::collector::collect_items_rec 51: rustc_monomorphize::collector::collect_items_rec 52: 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