"Broken MIR" error on latest nightly #93209
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C-bug
Category: This is a bug.
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I believe I'm encountering the same issue compiling Backtrace |
asomers
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Jan 22, 2022
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I'm seeing a similar error in capnproto-rust, which does not use any unstable features: error with backtrace |
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ditto when compile tonic error with backtrace |
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These are duplicates of #93161 and are already fixed on master, but not available on nightly yet. They will be fixed in the next nightly which will contain #93165. The most recent 2 nightlies have this issue:
We've checked yesterday that this PR fixes Please reopen this issue if tomorrow's nightly doesn't fix it. There are other ICEs that it does not fix but it's expected that the 3 above will be. |
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Thanks! |
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When compiling lsm-rs on latest rust I get a panic.
Meta
rustc --version --verbose:Notes
This also happens on github actions, so I can reproduce it on multiple machines.
I can only reproduce this on the most recent nightly (2022-01-21), 2022-01-20 and earlier work fine.
The crate uses a few unstable features, that might trigger this.
Backtrace
Backtrace
``` Compiling lsm v0.2.0 (/home/kai/dev/lsm-rs) error: internal compiler error: compiler/rustc_mir_transform/src/generator.rs:755:13: Broken MIR: generator contains type &mut dyn InternalIterator in MIR, but typeck only knows about {ResumeTy, &mut DbIteratorInner, usize, std::option::Option<(u64, usize)>, &mut [Box], Box, dyn InternalIterator, DbIteratorInner, std::option::Option>, &std::option::Option>, &Vec, bool, Pin + std::marker::Send>>, ()} and [&mut async_iter::DbIteratorInner, usize, std::option::Option<(u64, usize)>] --> src/async_iter.rs:121:83 | 121 | async fn parse_iter(&mut self, offset: usize, min_kv: MinKV) -> (bool, MinKV) { | ___________________________________________________________________________________^ 122 | | // Split slices to make the borrow checker happy 123 | | let (prev, cur) = self.iterators[..].split_at_mut(offset); 124 | | let iter = &mut *cur[0]; ... | 158 | | } 159 | | } | |_____^
thread 'rustc' panicked at 'Box', /rustc/17d29dcdce9b9e838635eb0adefd9b8b1588410b/compiler/rustc_errors/src/lib.rs:1115:9
stack backtrace:
0: std::panicking::begin_panic::<rustc_errors::ExplicitBug>
1: std::panic::panic_any::<rustc_errors::ExplicitBug>
2: <rustc_errors::HandlerInner>::span_bug::<rustc_span::span_encoding::Span>
3: <rustc_errors::Handler>::span_bug::<rustc_span::span_encoding::Span>
4: rustc_middle::ty::context::tls::with_opt::<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, ()>
5: rustc_middle::util::bug::opt_span_bug_fmt::<rustc_span::span_encoding::Span>
6: rustc_middle::util::bug::span_bug_fmt::<rustc_span::span_encoding::Span>
7: <rustc_mir_transform::generator::StateTransform as rustc_middle::mir::MirPass>::run_pass
8: rustc_mir_transform::pass_manager::run_passes
9: rustc_mir_transform::optimized_mir
10: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId, &rustc_middle::mir::Body>
11: rustc_data_structures::stack::ensure_sufficient_stack::<(&rustc_middle::mir::Body, rustc_query_system::dep_graph::graph::DepNodeIndex), rustc_query_system::query::plumbing::execute_job<rustc_query_impl::plumbing::QueryCtxt, rustc_span::def_id::DefId, &rustc_middle::mir::Body>::{closure#3}>
12: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, &rustc_middle::mir::Body>>
13: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::optimized_mir
14: <rustc_middle::ty::context::TyCtxt>::generator_layout
15: <rustc_middle::ty::layout::LayoutCx<rustc_middle::ty::context::TyCtxt>>::layout_of_uncached
16: rustc_middle::ty::layout::layout_of
17: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_middle::ty::ParamEnvAnd<&rustc_middle::ty::TyS>, core::result::Result<rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS>, rustc_middle::ty::layout::LayoutError>>
18: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::layout_of, rustc_query_impl::plumbing::QueryCtxt>
19: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::layout_of
20: core::iter::adapters::process_results::<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::ty::FieldDef>, <rustc_middle::ty::layout::LayoutCx<rustc_middle::ty::context::TyCtxt>>::layout_of_uncached::{closure#5}::{closure#0}>, rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS>, rustc_middle::ty::layout::LayoutError, <core::result::Result<alloc::vec::Vec<rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS>>, rustc_middle::ty::layout::LayoutError> as core::iter::traits::collect::FromIterator<core::result::Result<rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS>, rustc_middle::ty::layout::LayoutError>>>::from_iter<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::ty::FieldDef>, <rustc_middle::ty::layout::LayoutCx<rustc_middle::ty::context::TyCtxt>>::layout_of_uncached::{closure#5}::{closure#0}>>::{closure#0}, alloc::vec::Vec<rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS>>>
21: core::iter::adapters::process_results::<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::ty::VariantDef>, <rustc_middle::ty::layout::LayoutCx<rustc_middle::ty::context::TyCtxt>>::layout_of_uncached::{closure#5}>, alloc::vec::Vec<rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS>>, rustc_middle::ty::layout::LayoutError, <core::result::Result<rustc_index::vec::IndexVec<rustc_target::abi::VariantIdx, alloc::vec::Vec<rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS>>>, rustc_middle::ty::layout::LayoutError> as core::iter::traits::collect::FromIterator<core::result::Result<alloc::vec::Vec<rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS>>, rustc_middle::ty::layout::LayoutError>>>::from_iter<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::ty::VariantDef>, <rustc_middle::ty::layout::LayoutCx<rustc_middle::ty::context::TyCtxt>>::layout_of_uncached::{closure#5}>>::{closure#0}, rustc_index::vec::IndexVec<rustc_target::abi::VariantIdx, alloc::vec::Vec<rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS>>>>
22: <rustc_middle::ty::layout::LayoutCx<rustc_middle::ty::context::TyCtxt>>::layout_of_uncached
23: rustc_middle::ty::layout::layout_of
24: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_middle::ty::ParamEnvAnd<&rustc_middle::ty::TyS>, core::result::Result<rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS>, rustc_middle::ty::layout::LayoutError>>
25: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::layout_of, rustc_query_impl::plumbing::QueryCtxt>
26: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::layout_of
27: rustc_middle::ty::layout::layout_of
28: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_middle::ty::ParamEnvAnd<&rustc_middle::ty::TyS>, core::result::Result<rustc_target::abi::TyAndLayout<&rustc_middle::ty::TyS>, rustc_middle::ty::layout::LayoutError>>
29: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::layout_of, rustc_query_impl::plumbing::QueryCtxt>
30: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::layout_of
31: <rustc_mir_transform::const_prop::ConstProp as rustc_middle::mir::MirPass>::run_pass
32: rustc_mir_transform::pass_manager::run_passes
33: rustc_mir_transform::optimized_mir
34: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId, &rustc_middle::mir::Body>
35: rustc_data_structures::stack::ensure_sufficient_stack::<(&rustc_middle::mir::Body, rustc_query_system::dep_graph::graph::DepNodeIndex), rustc_query_system::query::plumbing::execute_job<rustc_query_impl::plumbing::QueryCtxt, rustc_span::def_id::DefId, &rustc_middle::mir::Body>::{closure#3}>
36: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, &rustc_middle::mir::Body>>
37: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::optimized_mir
38: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
39: rustc_metadata::rmeta::encoder::encode_metadata_impl
40: rustc_data_structures::sync::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, rustc_metadata::rmeta::encoder::EncodedMetadata, ()>
41: rustc_metadata::rmeta::encoder::encode_metadata
42: <rustc_interface::passes::QueryContext>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core::result::Result<alloc::boxed::Box, rustc_errors::ErrorReported>>
43: <rustc_interface::queries::Queries>::ongoing_codegen
44: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorReported>>
45: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorReported>, rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#1}>
46: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorReported>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorReported>>
note: Some details are omitted, run with
RUST_BACKTRACE=fullfor a verbose backtrace.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 1.60.0-nightly (17d29dc 2022-01-21) running on x86_64-unknown-linux-gnu
note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type lib
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
#0 [optimized_mir] optimizing MIR for
async_iter::<impl at src/async_iter.rs:103:1: 235:2>::parse_iter::{closure#0}#1 [layout_of] computing layout of
[static generator@src/async_iter.rs:121:83: 159:6]#2 [layout_of] computing layout of
core::future::from_generator::GenFuture<[static generator@src/async_iter.rs:121:83: 159:6]>#3 [layout_of] computing layout of
impl core::future::future::Future<Output = [async output]>#4 [optimized_mir] optimizing MIR for
async_iter::<impl at src/async_iter.rs:103:1: 235:2>::parse_iterend of query stack
error: could not compile
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