GAT ICE: cannot relate bound region

[Aiden2207]

Code

#![feature(generic_associated_types)]
pub trait LendingIterator {
    type Item<'a>
    where
        Self: 'a;

    fn consume<F>(self, _f: F)
    where
        Self: Sized,
        for<'a> Self::Item<'a>: FuncInput<'a, Self::Item<'a>>,
    {
    }
}

impl<I: LendingIterator + ?Sized> LendingIterator for &mut I {
    type Item<'a> = I::Item<'a> where Self: 'a;
}
struct EmptyIter;
impl LendingIterator for EmptyIter {
    type Item<'a> = &'a mut () where Self:'a;
}
pub trait FuncInput<'a, F>
where
    F: Foo<Self>,
    Self: Sized,
{
}
impl<'a, T, F: 'a> FuncInput<'a, F> for T where F: Foo<T> {}
trait Foo<T> {}

fn map_test() {
    (&mut EmptyIter).consume(()); 
}

Meta

rustc --version --verbose:

rustc 1.65.0-nightly (addacb587 2022-08-24)
binary: rustc
commit-hash: addacb5878b9970ebc1665768a05cb601e7aea15
commit-date: 2022-08-24
host: x86_64-pc-windows-msvc
release: 1.65.0-nightly
LLVM version: 15.0.0

Note that on the playground (nightly-2022-08-16) the correct error message is produced instead of an ICE.

Error output

error: internal compiler error: compiler\rustc_infer\src\infer\region_constraints\mod.rs:568:17: cannot relate bound region: ReLateBound(DebruijnIndex(0), BoundRegion { var: 0, kind: BrNamed(DefId(0:8 ~ lending_iter[ce9f]::LendingIterator::consume::'a), 'a) }) <= '_#1r

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/addacb5878b9970ebc1665768a05cb601e7aea15\compiler\rustc_errors\src\lib.rs:1393:9
stack backtrace:
   0:     0x7ffc8d3f8e06 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h498cb4722507e676
   1:     0x7ffc8d43470b - core::fmt::write::h92849121e8600c03
   2:     0x7ffc8d3eb9fa - <std::io::IoSlice as core::fmt::Debug>::fmt::h44e2382549910bc0
   3:     0x7ffc8d3fc584 - std::panicking::default_hook::h355dddac3d40a601
   4:     0x7ffc8d3fc1ba - std::panicking::default_hook::h355dddac3d40a601
   5:     0x7ffc6d382c92 - rustc_driver[f5adbe72392c62a3]::describe_lints
   6:     0x7ffc8d3fcf82 - std::panicking::rust_panic_with_hook::h7acd234e4dc18959     
   7:     0x7ffc6f4d4e63 - <rustc_infer[da0f39f7a067bf92]::infer::outlives::test_type_match::Match as rustc_middle[2b86214b3f6145ee]::ty::relate::TypeRelation>::consts       
   8:     0x7ffc6f4d1f59 - <rustc_infer[da0f39f7a067bf92]::infer::type_variable::TyVidEqKey as core[5929f349696a0fef]::fmt::Debug>::fmt
   9:     0x7ffc6f510cc9 - <rustc_infer[da0f39f7a067bf92]::infer::combine::ConstInferUnifier as rustc_middle[2b86214b3f6145ee]::ty::relate::TypeRelation>::tys
  10:     0x7ffc6f510cb9 - <rustc_infer[da0f39f7a067bf92]::infer::combine::ConstInferUnifier as rustc_middle[2b86214b3f6145ee]::ty::relate::TypeRelation>::tys
  11:     0x7ffc6f5104cf - <rustc_infer[da0f39f7a067bf92]::infer::combine::ConstInferUnifier as rustc_middle[2b86214b3f6145ee]::ty::relate::TypeRelation>::tys
  12:     0x7ffc6f510342 - <rustc_infer[da0f39f7a067bf92]::infer::combine::ConstInferUnifier as rustc_middle[2b86214b3f6145ee]::ty::relate::TypeRelation>::tys
  13:     0x7ffc6f4ed722 - <rustc_infer[da0f39f7a067bf92]::traits::project::ProjectionCacheEntry as core[5929f349696a0fef]::fmt::Debug>::fmt
  14:     0x7ffc6f4ed2a8 - <rustc_infer[da0f39f7a067bf92]::traits::project::ProjectionCacheEntry as core[5929f349696a0fef]::fmt::Debug>::fmt
  15:     0x7ffc6f4ed266 - <rustc_infer[da0f39f7a067bf92]::traits::project::ProjectionCacheEntry as core[5929f349696a0fef]::fmt::Debug>::fmt
  16:     0x7ffc6d175dcb - <rustc_infer[da0f39f7a067bf92]::infer::region_constraints::RegionConstraintCollector>::make_eqregion
  17:     0x7ffc6d1af5c2 - <rustc_middle[2b86214b3f6145ee]::ty::sty::ProjectionTy as rustc_infer[da0f39f7a067bf92]::infer::at::ToTrace>::to_trace
  18:     0x7ffc6d15ae3e - <rustc_infer[da0f39f7a067bf92]::infer::equate::Equate as rustc_middle[2b86214b3f6145ee]::ty::relate::TypeRelation>::tys
  19:     0x7ffc6d104e60 - <rustc_trait_selection[42d038ab64403654]::traits::query::normalize::QueryNormalizer as rustc_middle[2b86214b3f6145ee]::ty::fold::FallibleTypeFolder>::try_fold_ty
  20:     0x7ffc6f4427af - <&[rustc_hir[1e1037240eda7a15]::hir::GenericParam] as rustc_trait_selection[42d038ab64403654]::traits::error_reporting::suggestions::NextTypeParamName>::next_type_param_name
  21:     0x7ffc6f448803 - <rustc_infer[da0f39f7a067bf92]::infer::InferCtxt as rustc_trait_selection[42d038ab64403654]::traits::error_reporting::suggestions::InferCtxtExt>::suggest_dereferences
  22:     0x7ffc6f46070d - <rustc_infer[da0f39f7a067bf92]::infer::InferCtxt as rustc_trait_selection[42d038ab64403654]::traits::error_reporting::InferCtxtExt>::report_selection_error
  23:     0x7ffc6f46d713 - <rustc_infer[da0f39f7a067bf92]::infer::InferCtxt as rustc_trait_selection[42d038ab64403654]::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
  24:     0x7ffc6f45c97e - <rustc_infer[da0f39f7a067bf92]::infer::InferCtxt as rustc_trait_selection[42d038ab64403654]::traits::error_reporting::InferCtxtExt>::report_fulfillment_errors
  25:     0x7ffc6c8059a4 - <rustc_typeck[dafac4f190e2a07c]::check::fn_ctxt::FnCtxt>::demand_coerce_diag
  26:     0x7ffc6c7b65fd - <rustc_typeck[dafac4f190e2a07c]::check::fn_ctxt::FnCtxt>::demand_coerce
  27:     0x7ffc6c7d7cbb - <rustc_typeck[dafac4f190e2a07c]::check::fn_ctxt::FnCtxt>::structurally_resolved_type
  28:     0x7ffc6c7ff078 - <rustc_typeck[dafac4f190e2a07c]::check::fn_ctxt::FnCtxt>::demand_coerce_diag
  29:     0x7ffc6c7b65fd - <rustc_typeck[dafac4f190e2a07c]::check::fn_ctxt::FnCtxt>::demand_coerce
  30:     0x7ffc6c7e710c - <rustc_typeck[dafac4f190e2a07c]::check::fn_ctxt::FnCtxt>::check_stmt
  31:     0x7ffc6c7e7b37 - <rustc_typeck[dafac4f190e2a07c]::check::fn_ctxt::FnCtxt>::check_stmt
  32:     0x7ffc6c7fdb83 - <rustc_typeck[dafac4f190e2a07c]::check::fn_ctxt::FnCtxt>::demand_coerce_diag
  33:     0x7ffc6c7b65fd - <rustc_typeck[dafac4f190e2a07c]::check::fn_ctxt::FnCtxt>::demand_coerce
  34:     0x7ffc6c7b9190 - <rustc_typeck[dafac4f190e2a07c]::check::fn_ctxt::FnCtxt>::demand_coerce
  35:     0x7ffc6c879946 - <rustc_typeck[dafac4f190e2a07c]::check::inherited::Inherited>::register_predicate
  36:     0x7ffc6c83989c - rustc_typeck[dafac4f190e2a07c]::check::rvalue_scopes::resolve_rvalue_scopes
  37:     0x7ffc6c85a857 - <rustc_typeck[dafac4f190e2a07c]::check::UnsafetyState>::recurse
  38:     0x7ffc6b6de798 - <rustc_span[7be80b5dc77ad545]::hygiene::ExpnId as rustc_serialize[eeb66c00494392f7]::serialize::Decodable<rustc_query_impl[56bab2eb465dd4c3]::on_disk_cache::CacheDecoder>>::decode
  39:     0x7ffc6b81c51e - <&rustc_index[9c945373e6cac357]::vec::IndexVec<rustc_middle[2b86214b3f6145ee]::mir::Promoted, rustc_middle[2b86214b3f6145ee]::mir::Body> as rustc_serialize[eeb66c00494392f7]::serialize::Decodable<rustc_query_impl[56bab2eb465dd4c3]::on_disk_cache::CacheDecoder>>::decode
  40:     0x7ffc6cd56503 - <rustc_span[7be80b5dc77ad545]::symbol::Symbol as rustc_serialize[eeb66c00494392f7]::serialize::Encodable<rustc_query_impl[56bab2eb465dd4c3]::on_disk_cache::CacheEncoder>>::encode
  41:     0x7ffc6ccbeee2 - <rustc_query_impl[56bab2eb465dd4c3]::Queries as rustc_middle[2b86214b3f6145ee]::ty::query::QueryEngine>::as_any
  42:     0x7ffc6c85fc15 - <rustc_typeck[dafac4f190e2a07c]::check::inherited::Inherited>::register_predicate
  43:     0x7ffc6b4d6361 - rustc_typeck[dafac4f190e2a07c]::check::provide
  44:     0x7ffc6b6e02be - <rustc_span[7be80b5dc77ad545]::hygiene::ExpnId as rustc_serialize[eeb66c00494392f7]::serialize::Decodable<rustc_query_impl[56bab2eb465dd4c3]::on_disk_cache::CacheDecoder>>::decode
  45:     0x7ffc6b83c50d - <&rustc_index[9c945373e6cac357]::vec::IndexVec<rustc_middle[2b86214b3f6145ee]::mir::Promoted, rustc_middle[2b86214b3f6145ee]::mir::Body> as rustc_serialize[eeb66c00494392f7]::serialize::Decodable<rustc_query_impl[56bab2eb465dd4c3]::on_disk_cache::CacheDecoder>>::decode
  46:     0x7ffc6b78fe34 - <&rustc_index[9c945373e6cac357]::vec::IndexVec<rustc_middle[2b86214b3f6145ee]::mir::Promoted, rustc_middle[2b86214b3f6145ee]::mir::Body> as rustc_serialize[eeb66c00494392f7]::serialize::Decodable<rustc_query_impl[56bab2eb465dd4c3]::on_disk_cache::CacheDecoder>>::decode
  47:     0x7ffc6b7d453c - <&rustc_index[9c945373e6cac357]::vec::IndexVec<rustc_middle[2b86214b3f6145ee]::mir::Promoted, rustc_middle[2b86214b3f6145ee]::mir::Body> as rustc_serialize[eeb66c00494392f7]::serialize::Decodable<rustc_query_impl[56bab2eb465dd4c3]::on_disk_cache::CacheDecoder>>::decode
  48:     0x7ffc6b49cc6a - <rustc_typeck[dafac4f190e2a07c]::check::fn_ctxt::FnCtxt>::write_user_type_annotation
  49:     0x7ffc6b465c23 - rustc_typeck[dafac4f190e2a07c]::check_crate
  50:     0x7ffc6acaaa95 - rustc_interface[22cafcfb0a37eae3]::passes::analysis
  51:     0x7ffc6b6dfdae - <rustc_span[7be80b5dc77ad545]::hygiene::ExpnId as rustc_serialize[eeb66c00494392f7]::serialize::Decodable<rustc_query_impl[56bab2eb465dd4c3]::on_disk_cache::CacheDecoder>>::decode
  52:     0x7ffc6b836833 - <&rustc_index[9c945373e6cac357]::vec::IndexVec<rustc_middle[2b86214b3f6145ee]::mir::Promoted, rustc_middle[2b86214b3f6145ee]::mir::Body> as rustc_serialize[eeb66c00494392f7]::serialize::Decodable<rustc_query_impl[56bab2eb465dd4c3]::on_disk_cache::CacheDecoder>>::decode
  53:     0x7ffc6b77fb4f - <&rustc_index[9c945373e6cac357]::vec::IndexVec<rustc_middle[2b86214b3f6145ee]::mir::Promoted, rustc_middle[2b86214b3f6145ee]::mir::Body> as rustc_serialize[eeb66c00494392f7]::serialize::Decodable<rustc_query_impl[56bab2eb465dd4c3]::on_disk_cache::CacheDecoder>>::decode
  54:     0x7ffc6b80589d - <&rustc_index[9c945373e6cac357]::vec::IndexVec<rustc_middle[2b86214b3f6145ee]::mir::Promoted, rustc_middle[2b86214b3f6145ee]::mir::Body> as rustc_serialize[eeb66c00494392f7]::serialize::Decodable<rustc_query_impl[56bab2eb465dd4c3]::on_disk_cache::CacheDecoder>>::decode
  55:     0x7ffc6ac6c506 - <unknown>
  56:     0x7ffc6ac46cc8 - <unknown>
  57:     0x7ffc6ac4312a - <unknown>
  58:     0x7ffc6ac47e63 - <unknown>
  59:     0x7ffc6ac7e1c7 - rustc_driver[f5adbe72392c62a3]::args::arg_expand_all        
  60:     0x7ffc6ac464d9 - <unknown>
  61:     0x7ffc6ac6d6cd - <unknown>
  62:     0x7ffc8d40dc1c - std::sys::windows::thread::Thread::new::ha49a10ef5abed6d8   
  63:     0x7ffd1a37244d - BaseThreadInitThunk
  64:     0x7ffd1b40df78 - RtlUserThreadStart

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 1.65.0-nightly (addacb587 2022-08-24) running on x86_64-pc-windows-msvc    

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2 -C incremental

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [typeck] type-checking `map_test`
#1 [typeck_item_bodies] type-checking all item bodies
#2 [analysis] running analysis passes on this crate
end of query stack