#![feature(associated_type_bounds, return_position_impl_trait_in_trait)]
#![allow(incomplete_features)]
trait Iterator {
type Item;
}
trait IntoIterator {
fn into_iterator(&self) -> impl Iterator<Item:> + '_;
}
struct IntoIterFn<F, I>
{
f: F,
_marker: core::marker::PhantomData<I>,
}
impl<F, I> IntoIterator for IntoIterFn<F, I>
where
F: Fn() -> I,
I: Iterator,
{
fn into_iterator(&self) -> impl Iterator<Item: '_> {
(self.f)()
}
}rustc 1.69.0-nightly (7281249a1 2023-02-27)
error: internal compiler error: no errors encountered even though `delay_span_bug` issued
error: internal compiler error: expected ReFree to map to ReEarlyBound
--> src/lib.rs:23:32
|
23 | fn into_iterator(&self) -> impl Iterator<Item: '_> {
| ^^^^^^^^^^^^^^^^^^^^^^^
|
= note: delayed at 0: <rustc_errors::HandlerInner>::emit_diagnostic
1: <rustc_session::session::Session>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
2: rustc_hir_analysis::check::compare_impl_item::collect_return_position_impl_trait_in_trait_tys::{closure#0}::{closure#2}
3: rustc_middle::ty::util::fold_list::<rustc_middle::ty::fold::RegionFolder, rustc_middle::ty::subst::GenericArg, <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_type_ir::fold::TypeFoldable<rustc_middle::ty::context::TyCtxt>>::try_fold_with<rustc_middle::ty::fold::RegionFolder>::{closure#0}>
4: <rustc_middle::ty::Ty as rustc_type_ir::fold::TypeSuperFoldable<rustc_middle::ty::context::TyCtxt>>::super_fold_with::<rustc_middle::ty::fold::RegionFolder>
5: <rustc_middle::ty::context::TyCtxt>::fold_regions::<rustc_middle::ty::Ty, rustc_hir_analysis::check::compare_impl_item::collect_return_position_impl_trait_in_trait_tys::{closure#0}::{closure#2}>
6: rustc_hir_analysis::check::compare_impl_item::collect_return_position_impl_trait_in_trait_tys
7: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::collect_return_position_impl_trait_in_trait_tys, rustc_query_impl::plumbing::QueryCtxt>
8: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::collect_return_position_impl_trait_in_trait_tys
9: <rustc_middle::ty::context::TyCtxt>::bound_return_position_impl_trait_in_trait_tys
10: rustc_trait_selection::traits::project::opt_normalize_projection_type
11: <rustc_trait_selection::traits::project::AssocTypeNormalizer as rustc_type_ir::fold::TypeFolder<rustc_middle::ty::context::TyCtxt>>::fold_ty
12: <&rustc_middle::ty::list::List<rustc_middle::ty::Ty> as rustc_type_ir::fold::TypeFoldable<rustc_middle::ty::context::TyCtxt>>::try_fold_with::<rustc_trait_selection::traits::project::AssocTypeNormalizer>
13: <rustc_infer::infer::at::At as rustc_trait_selection::traits::project::NormalizeExt>::normalize::<rustc_middle::ty::sty::FnSig>
14: rustc_hir_analysis::check::compare_impl_item::compare_method_predicate_entailment
15: rustc_hir_analysis::check::compare_impl_item::compare_impl_method
16: rustc_hir_analysis::check::check::check_impl_items_against_trait
17: rustc_hir_analysis::check::check::check_mod_item_types
18: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::check_mod_item_types, rustc_query_impl::plumbing::QueryCtxt>
19: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::check_mod_item_types
20: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#6}>
21: rustc_hir_analysis::check_crate
22: rustc_interface::passes::analysis
23: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
24: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
25: <rustc_middle::ty::context::GlobalCtxt>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#4}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
26: rustc_span::with_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
27: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
28: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
29: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/alloc/src/boxed.rs:1988:9
30: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/alloc/src/boxed.rs:1988:9
31: std::sys::unix::thread::Thread::new::thread_start
at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/std/src/sys/unix/thread.rs:108:17
32: start_thread
33: clone
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 1.69.0-nightly (7281249a1 2023-02-27) running on x86_64-unknown-linux-gnu
note: compiler flags: --crate-type lib -C embed-bitcode=no -C codegen-units=1 -C debuginfo=2
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
end of query stack
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