ICE: cannot relate bound region: ReErased <= ReLateBound(...)

[bugadani]

Code

https://rust.godbolt.org/z/7fqj554dv

pub struct Bar<S>(S);

pub trait Foo {}

impl<S> Foo for Bar<S>
where
    for<'a> &'a S: IntoIterator,
    for<'a> <&'a S>::Item: Foo,
{
}

Meta

rustc --version --verbose:

rustc -vV
rustc 1.69.0-nightly (7281249a1 2023-02-27)
binary: rustc
commit-hash: 7281249a19a9755e9d889ee251ec323629caadab
commit-date: 2023-02-27
host: x86_64-pc-windows-msvc
release: 1.69.0-nightly
LLVM version: 15.0.7

Error output

error: internal compiler error: compiler/rustc_infer/src/infer/region_constraints/mod.rs:568:17: cannot relate bound region: ReErased <= ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrNamed(DefId(0:12 ~ example[113b]::{impl#0}::'a#1), 'a) })

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/7281249a19a9755e9d889ee251ec323629caadab/compiler/rustc_errors/src/lib.rs:995:33
...

Backtrace

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/7281249a19a9755e9d889ee251ec323629caadab/compiler/rustc_errors/src/lib.rs:995:33
stack backtrace:
   0:     0x7fa589eb7baa - std::backtrace_rs::backtrace::libunwind::trace::hed88b98b82d4f2e9
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fa589eb7baa - std::backtrace_rs::backtrace::trace_unsynchronized::ha265951554c18f80
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fa589eb7baa - std::sys_common::backtrace::_print_fmt::h905c58b80bf24d6a
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7fa589eb7baa - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h42fd3bc77561f5c7
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7fa589f1b2fe - core::fmt::write::hb1a89058387c66a8
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/core/src/fmt/mod.rs:1232:17
   5:     0x7fa589eaac15 - std::io::Write::write_fmt::h807c51614e4697cf
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/std/src/io/mod.rs:1684:15
   6:     0x7fa589eb7975 - std::sys_common::backtrace::_print::h94c45e542d878e8b
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7fa589eb7975 - std::sys_common::backtrace::print::hf09a0b93d8d5d616
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7fa589eba6ef - std::panicking::default_hook::{{closure}}::h854554d33df993ef
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/std/src/panicking.rs:271:22
   9:     0x7fa589eba42b - std::panicking::default_hook::h47e0374d899bdb79
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/std/src/panicking.rs:290:9
  10:     0x7fa58d1232f5 - rustc_driver_impl[1328d09be3dc1a8e]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7fa589ebaf2d - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd6f08b1b7897cbbd
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/alloc/src/boxed.rs:2002:9
  12:     0x7fa589ebaf2d - std::panicking::rust_panic_with_hook::h73cfebaefb6d5c31
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/std/src/panicking.rs:696:13
  13:     0x7fa58d4505d1 - std[d01210ab3b315fe2]::panicking::begin_panic::<rustc_errors[724dfc767d977539]::ExplicitBug>::{closure#0}
  14:     0x7fa58d44d3c6 - std[d01210ab3b315fe2]::sys_common::backtrace::__rust_end_short_backtrace::<std[d01210ab3b315fe2]::panicking::begin_panic<rustc_errors[724dfc767d977539]::ExplicitBug>::{closure#0}, !>
  15:     0x7fa58d44cc86 - std[d01210ab3b315fe2]::panicking::begin_panic::<rustc_errors[724dfc767d977539]::ExplicitBug>
  16:     0x7fa58d44cc76 - std[d01210ab3b315fe2]::panic::panic_any::<rustc_errors[724dfc767d977539]::ExplicitBug>
  17:     0x7fa58d449a72 - <rustc_errors[724dfc767d977539]::HandlerInner>::span_bug::<rustc_span[ca1c0a0508e86155]::span_encoding::Span, &alloc[24dd174104beeac0]::string::String>
  18:     0x7fa58d449837 - <rustc_errors[724dfc767d977539]::Handler>::span_bug::<rustc_span[ca1c0a0508e86155]::span_encoding::Span, &alloc[24dd174104beeac0]::string::String>
  19:     0x7fa58d480d2b - rustc_middle[1bc382fc214918e1]::util::bug::opt_span_bug_fmt::<rustc_span[ca1c0a0508e86155]::span_encoding::Span>::{closure#0}
  20:     0x7fa58d480d7a - rustc_middle[1bc382fc214918e1]::ty::context::tls::with_opt::<rustc_middle[1bc382fc214918e1]::util::bug::opt_span_bug_fmt<rustc_span[ca1c0a0508e86155]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7fa58d47fab6 - rustc_middle[1bc382fc214918e1]::ty::context::tls::with_context_opt::<rustc_middle[1bc382fc214918e1]::ty::context::tls::with_opt<rustc_middle[1bc382fc214918e1]::util::bug::opt_span_bug_fmt<rustc_span[ca1c0a0508e86155]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7fa58d47e3a6 - rustc_middle[1bc382fc214918e1]::util::bug::opt_span_bug_fmt::<rustc_span[ca1c0a0508e86155]::span_encoding::Span>
  23:     0x7fa58d47e364 - rustc_middle[1bc382fc214918e1]::util::bug::span_bug_fmt::<rustc_span[ca1c0a0508e86155]::span_encoding::Span>
  24:     0x7fa58b1dedfd - <rustc_infer[8a4c236fb3c80402]::infer::equate::Equate as rustc_middle[1bc382fc214918e1]::ty::relate::TypeRelation>::relate::<rustc_middle[1bc382fc214918e1]::ty::sty::Region>
  25:     0x7fa58b1da06d - rustc_middle[1bc382fc214918e1]::ty::relate::super_relate_tys::<rustc_infer[8a4c236fb3c80402]::infer::equate::Equate>
  26:     0x7fa58b1d7c34 - <rustc_infer[8a4c236fb3c80402]::infer::equate::Equate as rustc_middle[1bc382fc214918e1]::ty::relate::TypeRelation>::tys
  27:     0x7fa58beda53b - <rustc_infer[8a4c236fb3c80402]::infer::InferCtxt>::can_eq::<rustc_middle[1bc382fc214918e1]::ty::Ty>
  28:     0x7fa58d25531b - <&mut core[dfaf1ef37f016df7]::iter::adapters::cloned::clone_try_fold<rustc_span[ca1c0a0508e86155]::def_id::DefId, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<()>, core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator::any::check<rustc_span[ca1c0a0508e86155]::def_id::DefId, <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::probe_traits_that_match_assoc_ty::{closure#0}::{closure#1}>::{closure#0}>::{closure#0} as core[dfaf1ef37f016df7]::ops::function::FnMut<((), &rustc_span[ca1c0a0508e86155]::def_id::DefId)>>::call_mut
  29:     0x7fa58d29fe02 - <core[dfaf1ef37f016df7]::iter::adapters::map::Map<indexmap[47092f51bf5dd968]::map::Iter<rustc_middle[1bc382fc214918e1]::ty::fast_reject::SimplifiedType, alloc[24dd174104beeac0]::vec::Vec<rustc_span[ca1c0a0508e86155]::def_id::DefId>>, <rustc_middle[1bc382fc214918e1]::ty::context::TyCtxt>::all_impls::{closure#0}> as core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator>::try_fold::<(), <core[dfaf1ef37f016df7]::iter::adapters::flatten::FlattenCompat<_, _>>::iter_try_fold::flatten<&alloc[24dd174104beeac0]::vec::Vec<rustc_span[ca1c0a0508e86155]::def_id::DefId>, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<()>, <core[dfaf1ef37f016df7]::iter::adapters::flatten::FlattenCompat<_, _> as core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator>::try_fold::flatten<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::DefId>, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<()>, core[dfaf1ef37f016df7]::iter::adapters::cloned::clone_try_fold<rustc_span[ca1c0a0508e86155]::def_id::DefId, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<()>, core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator::any::check<rustc_span[ca1c0a0508e86155]::def_id::DefId, <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::probe_traits_that_match_assoc_ty::{closure#0}::{closure#1}>::{closure#0}>::{closure#0}>::{closure#0}>::{closure#0}, core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<()>>
  30:     0x7fa58d2b148d - <core[dfaf1ef37f016df7]::iter::adapters::chain::Chain<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::DefId>, core[dfaf1ef37f016df7]::iter::adapters::flatten::FlatMap<indexmap[47092f51bf5dd968]::map::Iter<rustc_middle[1bc382fc214918e1]::ty::fast_reject::SimplifiedType, alloc[24dd174104beeac0]::vec::Vec<rustc_span[ca1c0a0508e86155]::def_id::DefId>>, &alloc[24dd174104beeac0]::vec::Vec<rustc_span[ca1c0a0508e86155]::def_id::DefId>, <rustc_middle[1bc382fc214918e1]::ty::context::TyCtxt>::all_impls::{closure#0}>> as core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator>::try_fold::<(), core[dfaf1ef37f016df7]::iter::adapters::cloned::clone_try_fold<rustc_span[ca1c0a0508e86155]::def_id::DefId, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<()>, core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator::any::check<rustc_span[ca1c0a0508e86155]::def_id::DefId, <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::probe_traits_that_match_assoc_ty::{closure#0}::{closure#1}>::{closure#0}>::{closure#0}, core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<()>>
  31:     0x7fa58d24e35c - <&mut <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::probe_traits_that_match_assoc_ty::{closure#0} as core[dfaf1ef37f016df7]::ops::function::FnMut<(&rustc_span[ca1c0a0508e86155]::def_id::DefId,)>>::call_mut
  32:     0x7fa58d2858ef - <core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::DefId>> as core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator>::try_fold::<(), &mut core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator::find::check<rustc_span[ca1c0a0508e86155]::def_id::DefId, &mut <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::probe_traits_that_match_assoc_ty::{closure#0}>::{closure#0}, core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<rustc_span[ca1c0a0508e86155]::def_id::DefId>>
  33:     0x7fa58d2859da - <core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::CrateNum>> as core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator>::try_fold::<(), core[dfaf1ef37f016df7]::iter::adapters::map::map_try_fold<rustc_span[ca1c0a0508e86155]::def_id::CrateNum, core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::DefId>>, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<rustc_span[ca1c0a0508e86155]::def_id::DefId>, <rustc_middle[1bc382fc214918e1]::ty::context::TyCtxt>::all_traits::{closure#0}, <core[dfaf1ef37f016df7]::iter::adapters::flatten::FlattenCompat<_, _>>::iter_try_fold::flatten<core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::DefId>>, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<rustc_span[ca1c0a0508e86155]::def_id::DefId>, <core[dfaf1ef37f016df7]::iter::adapters::flatten::FlattenCompat<_, _> as core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator>::try_fold::flatten<core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::DefId>>, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<rustc_span[ca1c0a0508e86155]::def_id::DefId>, core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator::find::check<rustc_span[ca1c0a0508e86155]::def_id::DefId, &mut <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::probe_traits_that_match_assoc_ty::{closure#0}>::{closure#0}>::{closure#0}>::{closure#0}>::{closure#0}, core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<rustc_span[ca1c0a0508e86155]::def_id::DefId>>
  34:     0x7fa58d2b1249 - <core[dfaf1ef37f016df7]::iter::adapters::chain::Chain<core[dfaf1ef37f016df7]::iter::sources::once::Once<rustc_span[ca1c0a0508e86155]::def_id::CrateNum>, core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::CrateNum>>> as core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator>::try_fold::<(), core[dfaf1ef37f016df7]::iter::adapters::map::map_try_fold<rustc_span[ca1c0a0508e86155]::def_id::CrateNum, core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::DefId>>, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<rustc_span[ca1c0a0508e86155]::def_id::DefId>, <rustc_middle[1bc382fc214918e1]::ty::context::TyCtxt>::all_traits::{closure#0}, <core[dfaf1ef37f016df7]::iter::adapters::flatten::FlattenCompat<_, _>>::iter_try_fold::flatten<core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::DefId>>, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<rustc_span[ca1c0a0508e86155]::def_id::DefId>, <core[dfaf1ef37f016df7]::iter::adapters::flatten::FlattenCompat<_, _> as core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator>::try_fold::flatten<core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::DefId>>, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<rustc_span[ca1c0a0508e86155]::def_id::DefId>, core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator::find::check<rustc_span[ca1c0a0508e86155]::def_id::DefId, &mut <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::probe_traits_that_match_assoc_ty::{closure#0}>::{closure#0}>::{closure#0}>::{closure#0}>::{closure#0}, core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<rustc_span[ca1c0a0508e86155]::def_id::DefId>>
  35:     0x7fa58d29f58e - <core[dfaf1ef37f016df7]::iter::adapters::map::Map<core[dfaf1ef37f016df7]::iter::adapters::chain::Chain<core[dfaf1ef37f016df7]::iter::sources::once::Once<rustc_span[ca1c0a0508e86155]::def_id::CrateNum>, core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::CrateNum>>>, <rustc_middle[1bc382fc214918e1]::ty::context::TyCtxt>::all_traits::{closure#0}> as core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator>::try_fold::<(), <core[dfaf1ef37f016df7]::iter::adapters::flatten::FlattenCompat<_, _>>::iter_try_fold::flatten<core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::DefId>>, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<rustc_span[ca1c0a0508e86155]::def_id::DefId>, <core[dfaf1ef37f016df7]::iter::adapters::flatten::FlattenCompat<_, _> as core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator>::try_fold::flatten<core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::DefId>>, (), core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<rustc_span[ca1c0a0508e86155]::def_id::DefId>, core[dfaf1ef37f016df7]::iter::traits::iterator::Iterator::find::check<rustc_span[ca1c0a0508e86155]::def_id::DefId, &mut <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::probe_traits_that_match_assoc_ty::{closure#0}>::{closure#0}>::{closure#0}>::{closure#0}, core[dfaf1ef37f016df7]::ops::control_flow::ControlFlow<rustc_span[ca1c0a0508e86155]::def_id::DefId>>
  36:     0x7fa58d28c400 - <alloc[24dd174104beeac0]::vec::Vec<alloc[24dd174104beeac0]::string::String> as alloc[24dd174104beeac0]::vec::spec_from_iter::SpecFromIter<alloc[24dd174104beeac0]::string::String, core[dfaf1ef37f016df7]::iter::adapters::map::Map<core[dfaf1ef37f016df7]::iter::adapters::filter::Filter<core[dfaf1ef37f016df7]::iter::adapters::flatten::FlatMap<core[dfaf1ef37f016df7]::iter::adapters::chain::Chain<core[dfaf1ef37f016df7]::iter::sources::once::Once<rustc_span[ca1c0a0508e86155]::def_id::CrateNum>, core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::CrateNum>>>, core[dfaf1ef37f016df7]::iter::adapters::copied::Copied<core[dfaf1ef37f016df7]::slice::iter::Iter<rustc_span[ca1c0a0508e86155]::def_id::DefId>>, <rustc_middle[1bc382fc214918e1]::ty::context::TyCtxt>::all_traits::{closure#0}>, <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::probe_traits_that_match_assoc_ty::{closure#0}>, <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::probe_traits_that_match_assoc_ty::{closure#1}>>>::from_iter
  37:     0x7fa58d24ffc5 - <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::probe_traits_that_match_assoc_ty
  38:     0x7fa58bdd5bc0 - <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::associated_path_to_ty::{closure#0}
  39:     0x7fa58bdbc3f1 - <dyn rustc_hir_analysis[58bd12f7f7a259]::astconv::AstConv>::ast_ty_to_ty_inner::{closure#0}
  40:     0x7fa58b911e5d - rustc_hir_analysis[58bd12f7f7a259]::collect::predicates_of::gather_explicit_predicates_of
  41:     0x7fa58b90f813 - rustc_hir_analysis[58bd12f7f7a259]::collect::predicates_of::explicit_predicates_of
  42:     0x7fa58b90b7f9 - rustc_query_system[90808657c38d1bea]::query::plumbing::try_execute_query::<rustc_query_impl[b7eb43ed52c37c26]::queries::explicit_predicates_of, rustc_query_impl[b7eb43ed52c37c26]::plumbing::QueryCtxt>
  43:     0x7fa58b902e65 - rustc_query_system[90808657c38d1bea]::query::plumbing::try_execute_query::<rustc_query_impl[b7eb43ed52c37c26]::queries::predicates_defined_on, rustc_query_impl[b7eb43ed52c37c26]::plumbing::QueryCtxt>
  44:     0x7fa58bd9d905 - rustc_query_system[90808657c38d1bea]::query::plumbing::try_execute_query::<rustc_query_impl[b7eb43ed52c37c26]::queries::predicates_of, rustc_query_impl[b7eb43ed52c37c26]::plumbing::QueryCtxt>
  45:     0x7fa58bd9c8f3 - <rustc_query_impl[b7eb43ed52c37c26]::Queries as rustc_middle[1bc382fc214918e1]::ty::query::QueryEngine>::predicates_of
  46:     0x7fa58b948ca3 - <rustc_hir_analysis[58bd12f7f7a259]::collect::CollectItemTypesVisitor as rustc_hir[37358d514e413a25]::intravisit::Visitor>::visit_item
  47:     0x7fa58b9479e6 - <rustc_middle[1bc382fc214918e1]::hir::map::Map>::visit_item_likes_in_module::<rustc_hir_analysis[58bd12f7f7a259]::collect::CollectItemTypesVisitor>
  48:     0x7fa58b9478fc - rustc_hir_analysis[58bd12f7f7a259]::collect::collect_mod_item_types
  49:     0x7fa58c797181 - rustc_query_system[90808657c38d1bea]::query::plumbing::try_execute_query::<rustc_query_impl[b7eb43ed52c37c26]::queries::collect_mod_item_types, rustc_query_impl[b7eb43ed52c37c26]::plumbing::QueryCtxt>
  50:     0x7fa58c796d2a - <rustc_query_impl[b7eb43ed52c37c26]::Queries as rustc_middle[1bc382fc214918e1]::ty::query::QueryEngine>::collect_mod_item_types
  51:     0x7fa58b57c916 - <rustc_session[b38dad6cf268045a]::session::Session>::track_errors::<rustc_hir_analysis[58bd12f7f7a259]::check_crate::{closure#0}, ()>
  52:     0x7fa58b5794f2 - rustc_hir_analysis[58bd12f7f7a259]::check_crate
  53:     0x7fa58b56f472 - rustc_interface[e667fd6539aa89ef]::passes::analysis
  54:     0x7fa58c979f6d - rustc_query_system[90808657c38d1bea]::query::plumbing::try_execute_query::<rustc_query_impl[b7eb43ed52c37c26]::queries::analysis, rustc_query_impl[b7eb43ed52c37c26]::plumbing::QueryCtxt>
  55:     0x7fa58c979c6f - <rustc_query_impl[b7eb43ed52c37c26]::Queries as rustc_middle[1bc382fc214918e1]::ty::query::QueryEngine>::analysis
  56:     0x7fa58c79ff06 - <rustc_middle[1bc382fc214918e1]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[1328d09be3dc1a8e]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[dfaf1ef37f016df7]::result::Result<(), rustc_span[ca1c0a0508e86155]::ErrorGuaranteed>>
  57:     0x7fa58c3818d8 - rustc_span[ca1c0a0508e86155]::with_source_map::<core[dfaf1ef37f016df7]::result::Result<(), rustc_span[ca1c0a0508e86155]::ErrorGuaranteed>, rustc_interface[e667fd6539aa89ef]::interface::run_compiler<core[dfaf1ef37f016df7]::result::Result<(), rustc_span[ca1c0a0508e86155]::ErrorGuaranteed>, rustc_driver_impl[1328d09be3dc1a8e]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  58:     0x7fa58c378fbc - std[d01210ab3b315fe2]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[e667fd6539aa89ef]::util::run_in_thread_pool_with_globals<rustc_interface[e667fd6539aa89ef]::interface::run_compiler<core[dfaf1ef37f016df7]::result::Result<(), rustc_span[ca1c0a0508e86155]::ErrorGuaranteed>, rustc_driver_impl[1328d09be3dc1a8e]::run_compiler::{closure#1}>::{closure#0}, core[dfaf1ef37f016df7]::result::Result<(), rustc_span[ca1c0a0508e86155]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[dfaf1ef37f016df7]::result::Result<(), rustc_span[ca1c0a0508e86155]::ErrorGuaranteed>>
  59:     0x7fa58c3789ea - <<std[d01210ab3b315fe2]::thread::Builder>::spawn_unchecked_<rustc_interface[e667fd6539aa89ef]::util::run_in_thread_pool_with_globals<rustc_interface[e667fd6539aa89ef]::interface::run_compiler<core[dfaf1ef37f016df7]::result::Result<(), rustc_span[ca1c0a0508e86155]::ErrorGuaranteed>, rustc_driver_impl[1328d09be3dc1a8e]::run_compiler::{closure#1}>::{closure#0}, core[dfaf1ef37f016df7]::result::Result<(), rustc_span[ca1c0a0508e86155]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[dfaf1ef37f016df7]::result::Result<(), rustc_span[ca1c0a0508e86155]::ErrorGuaranteed>>::{closure#1} as core[dfaf1ef37f016df7]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  60:     0x7fa589ec4d63 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h23732028e1dd2dcf
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/alloc/src/boxed.rs:1988:9
  61:     0x7fa589ec4d63 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h10e7b0e430440157
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/alloc/src/boxed.rs:1988:9
  62:     0x7fa589ec4d63 - std::sys::unix::thread::Thread::new::thread_start::hf1c234831da9bd27
                               at /rustc/7281249a19a9755e9d889ee251ec323629caadab/library/std/src/sys/unix/thread.rs:108:17
  63:     0x7fa589d8e609 - start_thread
  64:     0x7fa589cb1133 - clone
  65:                0x0 - <unknown>

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: -C debuginfo=1 -C llvm-args=--x86-asm-syntax=intel --crate-type rlib

query stack during panic:
#0 [explicit_predicates_of] computing explicit predicates of `<impl at <source>:8:1: 8:23>`
#1 [predicates_defined_on] computing predicates of `<impl at <source>:8:1: 8:23>`
#2 [predicates_of] computing predicates of `<impl at <source>:8:1: 8:23>`
#3 [collect_mod_item_types] collecting item types in top-level module
#4 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error

[bugadani]

Forgot to say that the above example is a conventional compile error on 1.67 that hints at why the code is incorrect. The following, fixed version is accepted by both 1.67 and nightly:

pub struct Bar<S>(S);

pub trait Foo {}

impl<S> Foo for Bar<S>
where
    for<'a> &'a S: IntoIterator,
    for<'a> <&'a S as IntoIterator>::Item: Foo,
{
}

[clubby789]

Regression in rust-lang-ci@8f80c53 -> #106585

searched nightlies: from nightly-2023-01-01 to nightly-2023-02-28
regressed nightly: nightly-2023-01-15
searched commit range: 0b90256...afaf3e0
regressed commit: a11eb4f

bisected with cargo-bisect-rustc v0.6.5

Host triple: x86_64-unknown-linux-gnu
Reproduce with:

cargo bisect-rustc 2023-01-01 --regress=ice --preserve -v 

cc @estebank