rustdoc: stack overflow: rustdoc::clean::clean_qpath()

[matthiaskrgr]

I tried this code:
./src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle-2.rs

#![feature(type_alias_impl_trait)]

type Foo = impl PartialEq<(Foo, i32)>;

struct Bar;

impl PartialEq<(Foo, i32)> for Bar {
//~^ ERROR cannot implement trait on type alias impl trait
    fn eq(&self, _other: &(Foo, i32)) -> bool {
        true
    }
}

fn foo() -> Foo {
    Bar
}

fn main() {}

Meta

rustc --version --verbose:

rustdoc 1.63.0-nightly (ca122c7eb 2022-06-13)
binary: rustdoc
commit-hash: ca122c7ebb3ab50149c9d3d24ddb59c252b32272
commit-date: 2022-06-13
host: x86_64-unknown-linux-gnu
release: 1.63.0-nightly
LLVM version: 14.0.5

Backtrace

....
#32191 0x000055555556f425 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32192 0x000055555554fb4d in <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<rustdoc::clean::types::GenericArg, <alloc::vec::Vec<rustdoc::clean::types::GenericArg> as alloc::vec::spec_extend::SpecExtend<rustdoc::clean::types::GenericArg, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}>>>::spec_extend::{closure#0}>::{closure#0}> ()
#32193 0x000055555556fc60 in <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean ()
#32194 0x00005555556c291f in <alloc::vec::Vec<rustdoc::clean::types::PathSegment> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::PathSegment, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::PathSegment>, <rustc_hir::hir::Path as rustdoc::clean::Clean<rustdoc::clean::types::Path>>::clean::{closure#0}>>>::from_iter ()
#32195 0x000055555556c2ae in <rustc_hir::hir::PolyTraitRef as rustdoc::clean::Clean<rustdoc::clean::types::PolyTrait>>::clean ()
#32196 0x000055555556b3de in <rustc_hir::hir::GenericBound as rustdoc::clean::Clean<core::option::Option<rustdoc::clean::types::GenericBound>>>::clean ()
#32197 0x00005555556c340c in <alloc::vec::Vec<rustdoc::clean::types::GenericBound> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::GenericBound, core::iter::adapters::filter_map::FilterMap<core::slice::iter::Iter<rustc_hir::hir::GenericBound>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#1}>>>::from_iter ()
#32198 0x000055555556f488 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32199 0x0000555555753f87 in <rustdoc::core::DocContext>::enter_alias::<rustdoc::clean::maybe_expand_private_type_alias::{closure#3}, rustdoc::clean::types::Type> ()
#32200 0x00005555557cd791 in rustdoc::clean::clean_qpath ()
#32201 0x000055555556f206 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32202 0x00005555556c88ce in <alloc::vec::Vec<rustdoc::clean::types::Type> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::Type, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::Ty>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#0}>>>::from_iter ()
#32203 0x000055555556f425 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32204 0x000055555554fb4d in <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<rustdoc::clean::types::GenericArg, <alloc::vec::Vec<rustdoc::clean::types::GenericArg> as alloc::vec::spec_extend::SpecExtend<rustdoc::clean::types::GenericArg, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}>>>::spec_extend::{closure#0}>::{closure#0}> ()
#32205 0x000055555556fc60 in <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean ()
#32206 0x00005555556c291f in <alloc::vec::Vec<rustdoc::clean::types::PathSegment> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::PathSegment, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::PathSegment>, <rustc_hir::hir::Path as rustdoc::clean::Clean<rustdoc::clean::types::Path>>::clean::{closure#0}>>>::from_iter ()
#32207 0x000055555556c2ae in <rustc_hir::hir::PolyTraitRef as rustdoc::clean::Clean<rustdoc::clean::types::PolyTrait>>::clean ()
#32208 0x000055555556b3de in <rustc_hir::hir::GenericBound as rustdoc::clean::Clean<core::option::Option<rustdoc::clean::types::GenericBound>>>::clean ()
#32209 0x00005555556c340c in <alloc::vec::Vec<rustdoc::clean::types::GenericBound> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::GenericBound, core::iter::adapters::filter_map::FilterMap<core::slice::iter::Iter<rustc_hir::hir::GenericBound>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#1}>>>::from_iter ()
#32210 0x000055555556f488 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32211 0x0000555555753f87 in <rustdoc::core::DocContext>::enter_alias::<rustdoc::clean::maybe_expand_private_type_alias::{closure#3}, rustdoc::clean::types::Type> ()
#32212 0x00005555557cd791 in rustdoc::clean::clean_qpath ()
#32213 0x000055555556f206 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32214 0x00005555556c88ce in <alloc::vec::Vec<rustdoc::clean::types::Type> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::Type, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::Ty>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#0}>>>::from_iter ()
#32215 0x000055555556f425 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32216 0x000055555554fb4d in <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<rustdoc::clean::types::GenericArg, <alloc::vec::Vec<rustdoc::clean::types::GenericArg> as alloc::vec::spec_extend::SpecExtend<rustdoc::clean::types::GenericArg, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}>>>::spec_extend::{closure#0}>::{closure#0}> ()
#32217 0x000055555556fc60 in <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean ()
#32218 0x00005555556c291f in <alloc::vec::Vec<rustdoc::clean::types::PathSegment> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::PathSegment, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::PathSegment>, <rustc_hir::hir::Path as rustdoc::clean::Clean<rustdoc::clean::types::Path>>::clean::{closure#0}>>>::from_iter ()
#32219 0x000055555556c2ae in <rustc_hir::hir::PolyTraitRef as rustdoc::clean::Clean<rustdoc::clean::types::PolyTrait>>::clean ()
#32220 0x000055555556b3de in <rustc_hir::hir::GenericBound as rustdoc::clean::Clean<core::option::Option<rustdoc::clean::types::GenericBound>>>::clean ()
#32221 0x00005555556c340c in <alloc::vec::Vec<rustdoc::clean::types::GenericBound> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::GenericBound, core::iter::adapters::filter_map::FilterMap<core::slice::iter::Iter<rustc_hir::hir::GenericBound>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#1}>>>::from_iter ()
#32222 0x000055555556f488 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32223 0x0000555555753f87 in <rustdoc::core::DocContext>::enter_alias::<rustdoc::clean::maybe_expand_private_type_alias::{closure#3}, rustdoc::clean::types::Type> ()
#32224 0x00005555557cd791 in rustdoc::clean::clean_qpath ()
#32225 0x000055555556f206 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32226 0x00005555556c88ce in <alloc::vec::Vec<rustdoc::clean::types::Type> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::Type, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::Ty>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#0}>>>::from_iter ()
#32227 0x000055555556f425 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32228 0x000055555554fb4d in <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<rustdoc::clean::types::GenericArg, <alloc::vec::Vec<rustdoc::clean::types::GenericArg> as alloc::vec::spec_extend::SpecExtend<rustdoc::clean::types::GenericArg, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}>>>::spec_extend::{closure#0}>::{closure#0}> ()
#32229 0x000055555556fc60 in <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean ()
#32230 0x00005555556c291f in <alloc::vec::Vec<rustdoc::clean::types::PathSegment> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::PathSegment, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::PathSegment>, <rustc_hir::hir::Path as rustdoc::clean::Clean<rustdoc::clean::types::Path>>::clean::{closure#0}>>>::from_iter ()
#32231 0x000055555556c2ae in <rustc_hir::hir::PolyTraitRef as rustdoc::clean::Clean<rustdoc::clean::types::PolyTrait>>::clean ()
#32232 0x000055555556b3de in <rustc_hir::hir::GenericBound as rustdoc::clean::Clean<core::option::Option<rustdoc::clean::types::GenericBound>>>::clean ()
#32233 0x00005555556c340c in <alloc::vec::Vec<rustdoc::clean::types::GenericBound> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::GenericBound, core::iter::adapters::filter_map::FilterMap<core::slice::iter::Iter<rustc_hir::hir::GenericBound>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#1}>>>::from_iter ()
#32234 0x000055555556f488 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32235 0x0000555555753f87 in <rustdoc::core::DocContext>::enter_alias::<rustdoc::clean::maybe_expand_private_type_alias::{closure#3}, rustdoc::clean::types::Type> ()
#32236 0x00005555557cd791 in rustdoc::clean::clean_qpath ()
#32237 0x000055555556f206 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32238 0x00005555556c88ce in <alloc::vec::Vec<rustdoc::clean::types::Type> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::Type, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::Ty>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#0}>>>::from_iter ()
#32239 0x000055555556f425 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32240 0x000055555554fb4d in <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<rustdoc::clean::types::GenericArg, <alloc::vec::Vec<rustdoc::clean::types::GenericArg> as alloc::vec::spec_extend::SpecExtend<rustdoc::clean::types::GenericArg, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}>>>::spec_extend::{closure#0}>::{closure#0}> ()
--Type <RET> for more, q to quit, c to continue without paging--
#32241 0x000055555556fc60 in <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean ()
#32242 0x00005555556c291f in <alloc::vec::Vec<rustdoc::clean::types::PathSegment> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::PathSegment, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::PathSegment>, <rustc_hir::hir::Path as rustdoc::clean::Clean<rustdoc::clean::types::Path>>::clean::{closure#0}>>>::from_iter ()
#32243 0x000055555556c2ae in <rustc_hir::hir::PolyTraitRef as rustdoc::clean::Clean<rustdoc::clean::types::PolyTrait>>::clean ()
#32244 0x000055555556b3de in <rustc_hir::hir::GenericBound as rustdoc::clean::Clean<core::option::Option<rustdoc::clean::types::GenericBound>>>::clean ()
#32245 0x00005555556c340c in <alloc::vec::Vec<rustdoc::clean::types::GenericBound> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::GenericBound, core::iter::adapters::filter_map::FilterMap<core::slice::iter::Iter<rustc_hir::hir::GenericBound>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#1}>>>::from_iter ()
#32246 0x000055555556f488 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32247 0x0000555555753f87 in <rustdoc::core::DocContext>::enter_alias::<rustdoc::clean::maybe_expand_private_type_alias::{closure#3}, rustdoc::clean::types::Type> ()
#32248 0x00005555557cd791 in rustdoc::clean::clean_qpath ()
#32249 0x000055555556f206 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32250 0x00005555556c88ce in <alloc::vec::Vec<rustdoc::clean::types::Type> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::Type, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::Ty>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#0}>>>::from_iter ()
#32251 0x000055555556f425 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32252 0x000055555554fb4d in <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<rustdoc::clean::types::GenericArg, <alloc::vec::Vec<rustdoc::clean::types::GenericArg> as alloc::vec::spec_extend::SpecExtend<rustdoc::clean::types::GenericArg, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}>>>::spec_extend::{closure#0}>::{closure#0}> ()
#32253 0x000055555556fc60 in <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean ()
#32254 0x00005555556c291f in <alloc::vec::Vec<rustdoc::clean::types::PathSegment> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::PathSegment, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::PathSegment>, <rustc_hir::hir::Path as rustdoc::clean::Clean<rustdoc::clean::types::Path>>::clean::{closure#0}>>>::from_iter ()
#32255 0x000055555556c2ae in <rustc_hir::hir::PolyTraitRef as rustdoc::clean::Clean<rustdoc::clean::types::PolyTrait>>::clean ()
#32256 0x000055555556b3de in <rustc_hir::hir::GenericBound as rustdoc::clean::Clean<core::option::Option<rustdoc::clean::types::GenericBound>>>::clean ()
#32257 0x00005555556c340c in <alloc::vec::Vec<rustdoc::clean::types::GenericBound> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::GenericBound, core::iter::adapters::filter_map::FilterMap<core::slice::iter::Iter<rustc_hir::hir::GenericBound>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#1}>>>::from_iter ()
#32258 0x000055555556f488 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32259 0x0000555555753f87 in <rustdoc::core::DocContext>::enter_alias::<rustdoc::clean::maybe_expand_private_type_alias::{closure#3}, rustdoc::clean::types::Type> ()
#32260 0x00005555557cd791 in rustdoc::clean::clean_qpath ()
#32261 0x000055555556f206 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32262 0x00005555556c88ce in <alloc::vec::Vec<rustdoc::clean::types::Type> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::Type, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::Ty>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#0}>>>::from_iter ()
#32263 0x000055555556f425 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32264 0x000055555554fb4d in <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<rustdoc::clean::types::GenericArg, <alloc::vec::Vec<rustdoc::clean::types::GenericArg> as alloc::vec::spec_extend::SpecExtend<rustdoc::clean::types::GenericArg, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}>>>::spec_extend::{closure#0}>::{closure#0}> ()
#32265 0x000055555556fc60 in <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean ()
#32266 0x00005555556c291f in <alloc::vec::Vec<rustdoc::clean::types::PathSegment> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::PathSegment, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::PathSegment>, <rustc_hir::hir::Path as rustdoc::clean::Clean<rustdoc::clean::types::Path>>::clean::{closure#0}>>>::from_iter ()
#32267 0x000055555556c2ae in <rustc_hir::hir::PolyTraitRef as rustdoc::clean::Clean<rustdoc::clean::types::PolyTrait>>::clean ()
#32268 0x000055555556b3de in <rustc_hir::hir::GenericBound as rustdoc::clean::Clean<core::option::Option<rustdoc::clean::types::GenericBound>>>::clean ()
#32269 0x00005555556c340c in <alloc::vec::Vec<rustdoc::clean::types::GenericBound> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::GenericBound, core::iter::adapters::filter_map::FilterMap<core::slice::iter::Iter<rustc_hir::hir::GenericBound>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#1}>>>::from_iter ()
#32270 0x000055555556f488 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32271 0x0000555555753f87 in <rustdoc::core::DocContext>::enter_alias::<rustdoc::clean::maybe_expand_private_type_alias::{closure#3}, rustdoc::clean::types::Type> ()
#32272 0x00005555557cd791 in rustdoc::clean::clean_qpath ()
#32273 0x000055555556f206 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32274 0x00005555556c88ce in <alloc::vec::Vec<rustdoc::clean::types::Type> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::Type, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::Ty>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#0}>>>::from_iter ()
#32275 0x000055555556f425 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32276 0x000055555554fb4d in <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<rustdoc::clean::types::GenericArg, <alloc::vec::Vec<rustdoc::clean::types::GenericArg> as alloc::vec::spec_extend::SpecExtend<rustdoc::clean::types::GenericArg, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}>>>::spec_extend::{closure#0}>::{closure#0}> ()
#32277 0x000055555556fc60 in <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean ()
#32278 0x00005555556c291f in <alloc::vec::Vec<rustdoc::clean::types::PathSegment> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::PathSegment, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::PathSegment>, <rustc_hir::hir::Path as rustdoc::clean::Clean<rustdoc::clean::types::Path>>::clean::{closure#0}>>>::from_iter ()
#32279 0x000055555556c2ae in <rustc_hir::hir::PolyTraitRef as rustdoc::clean::Clean<rustdoc::clean::types::PolyTrait>>::clean ()
#32280 0x000055555556b3de in <rustc_hir::hir::GenericBound as rustdoc::clean::Clean<core::option::Option<rustdoc::clean::types::GenericBound>>>::clean ()
#32281 0x00005555556c340c in <alloc::vec::Vec<rustdoc::clean::types::GenericBound> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::GenericBound, core::iter::adapters::filter_map::FilterMap<core::slice::iter::Iter<rustc_hir::hir::GenericBound>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#1}>>>::from_iter ()
#32282 0x000055555556f488 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32283 0x0000555555753f87 in <rustdoc::core::DocContext>::enter_alias::<rustdoc::clean::maybe_expand_private_type_alias::{closure#3}, rustdoc::clean::types::Type> ()
#32284 0x00005555557cd791 in rustdoc::clean::clean_qpath ()
#32285 0x000055555556f206 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32286 0x00005555556c88ce in <alloc::vec::Vec<rustdoc::clean::types::Type> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::Type, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::Ty>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#0}>>>::from_iter ()
#32287 0x000055555556f425 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32288 0x000055555554fb4d in <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<rustdoc::clean::types::GenericArg, <alloc::vec::Vec<rustdoc::clean::types::GenericArg> as alloc::vec::spec_extend::SpecExtend<rustdoc::clean::types::GenericArg, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}>>>::spec_extend::{closure#0}>::{closure#0}> ()
#32289 0x000055555556fc60 in <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean ()
#32290 0x00005555556c291f in <alloc::vec::Vec<rustdoc::clean::types::PathSegment> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::PathSegment, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::PathSegment>, <rustc_hir::hir::Path as rustdoc::clean::Clean<rustdoc::clean::types::Path>>::clean::{closure#0}>>>::from_iter ()
#32291 0x000055555556c2ae in <rustc_hir::hir::PolyTraitRef as rustdoc::clean::Clean<rustdoc::clean::types::PolyTrait>>::clean ()
#32292 0x000055555556b3de in <rustc_hir::hir::GenericBound as rustdoc::clean::Clean<core::option::Option<rustdoc::clean::types::GenericBound>>>::clean ()
#32293 0x00005555556c340c in <alloc::vec::Vec<rustdoc::clean::types::GenericBound> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::GenericBound, core::iter::adapters::filter_map::FilterMap<core::slice::iter::Iter<rustc_hir::hir::GenericBound>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#1}>>>::from_iter ()
#32294 0x000055555556f488 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32295 0x0000555555753f87 in <rustdoc::core::DocContext>::enter_alias::<rustdoc::clean::maybe_expand_private_type_alias::{closure#3}, rustdoc::clean::types::Type> ()
#32296 0x00005555557cd791 in rustdoc::clean::clean_qpath ()
#32297 0x000055555556f206 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32298 0x00005555556c88ce in <alloc::vec::Vec<rustdoc::clean::types::Type> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::Type, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::Ty>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#0}>>>::from_iter ()
#32299 0x000055555556f425 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32300 0x000055555554fb4d in <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<rustdoc::clean::types::GenericArg, <alloc::vec::Vec<rustdoc::clean::types::GenericArg> as alloc::vec::spec_extend::SpecExtend<rustdoc::clean::types::GenericArg, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}>>>::spec_extend::{closure#0}>::{closure#0}> ()
#32301 0x000055555556fc60 in <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean ()
#32302 0x00005555556c291f in <alloc::vec::Vec<rustdoc::clean::types::PathSegment> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::PathSegment, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::PathSegment>, <rustc_hir::hir::Path as rustdoc::clean::Clean<rustdoc::clean::types::Path>>::clean::{closure#0}>>>::from_iter ()
--Type <RET> for more, q to quit, c to continue without paging--
#32303 0x000055555556c2ae in <rustc_hir::hir::PolyTraitRef as rustdoc::clean::Clean<rustdoc::clean::types::PolyTrait>>::clean ()
#32304 0x000055555556b3de in <rustc_hir::hir::GenericBound as rustdoc::clean::Clean<core::option::Option<rustdoc::clean::types::GenericBound>>>::clean ()
#32305 0x00005555556c340c in <alloc::vec::Vec<rustdoc::clean::types::GenericBound> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::GenericBound, core::iter::adapters::filter_map::FilterMap<core::slice::iter::Iter<rustc_hir::hir::GenericBound>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#1}>>>::from_iter ()
#32306 0x000055555556f488 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32307 0x0000555555753f87 in <rustdoc::core::DocContext>::enter_alias::<rustdoc::clean::maybe_expand_private_type_alias::{closure#3}, rustdoc::clean::types::Type> ()
#32308 0x00005555557cd791 in rustdoc::clean::clean_qpath ()
#32309 0x000055555556f206 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32310 0x00005555556c88ce in <alloc::vec::Vec<rustdoc::clean::types::Type> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::Type, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::Ty>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#0}>>>::from_iter ()
#32311 0x000055555556f425 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32312 0x000055555554fb4d in <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}> as core::iter::traits::iterator::Iterator>::fold::<(), core::iter::traits::iterator::Iterator::for_each::call<rustdoc::clean::types::GenericArg, <alloc::vec::Vec<rustdoc::clean::types::GenericArg> as alloc::vec::spec_extend::SpecExtend<rustdoc::clean::types::GenericArg, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::GenericArg>, <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean::{closure#1}>>>::spec_extend::{closure#0}>::{closure#0}> ()
#32313 0x000055555556fc60 in <rustc_hir::hir::GenericArgs as rustdoc::clean::Clean<rustdoc::clean::types::GenericArgs>>::clean ()
#32314 0x00005555556c291f in <alloc::vec::Vec<rustdoc::clean::types::PathSegment> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::PathSegment, core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_hir::hir::PathSegment>, <rustc_hir::hir::Path as rustdoc::clean::Clean<rustdoc::clean::types::Path>>::clean::{closure#0}>>>::from_iter ()
#32315 0x000055555556c2ae in <rustc_hir::hir::PolyTraitRef as rustdoc::clean::Clean<rustdoc::clean::types::PolyTrait>>::clean ()
#32316 0x000055555556b3de in <rustc_hir::hir::GenericBound as rustdoc::clean::Clean<core::option::Option<rustdoc::clean::types::GenericBound>>>::clean ()
#32317 0x00005555556c340c in <alloc::vec::Vec<rustdoc::clean::types::GenericBound> as alloc::vec::spec_from_iter::SpecFromIter<rustdoc::clean::types::GenericBound, core::iter::adapters::filter_map::FilterMap<core::slice::iter::Iter<rustc_hir::hir::GenericBound>, <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean::{closure#1}>>>::from_iter ()
#32318 0x000055555556f488 in <rustc_hir::hir::Ty as rustdoc::clean::Clean<rustdoc::clean::types::Type>>::clean ()
#32319 0x00005555557516af in <rustdoc::core::DocContext>::with_param_env::<alloc::vec::Vec<rustdoc::clean::types::Item>, rustdoc::clean::clean_maybe_renamed_item::{closure#1}> ()
#32320 0x00005555556b9bb2 in <alloc::vec::Vec<rustdoc::clean::types::Item> as alloc::vec::spec_extend::SpecExtend<rustdoc::clean::types::Item, core::iter::adapters::flatten::FlatMap<core::slice::iter::Iter<(&rustc_hir::hir::Item, core::option::Option<rustc_span::symbol::Symbol>)>, alloc::vec::Vec<rustdoc::clean::types::Item>, <rustdoc::visit_ast::Module as rustdoc::clean::Clean<rustdoc::clean::types::Item>>::clean::{closure#2}>>>::spec_extend ()
#32321 0x0000555555619ea6 in <rustdoc::visit_ast::Module as rustdoc::clean::Clean<rustdoc::clean::types::Item>>::clean ()
#32322 0x0000555555667865 in rustdoc::clean::utils::krate ()
#32323 0x0000555555789585 in <rustc_session::session::Session>::time::<rustdoc::clean::types::Crate, rustdoc::core::run_global_ctxt::{closure#5}> ()
#32324 0x00005555557592ca in rustdoc::core::run_global_ctxt ()
#32325 0x0000555555789bff in <rustc_session::session::Session>::time::<(rustdoc::clean::types::Crate, rustdoc::config::RenderOptions, rustdoc::formats::cache::Cache), rustdoc::main_options::{closure#0}::{closure#0}::{closure#1}::{closure#0}> ()
#32326 0x00005555557219a4 in <rustc_interface::passes::QueryContext>::enter::<rustdoc::main_options::{closure#0}::{closure#0}::{closure#1}, core::result::Result<(), rustc_errors::ErrorGuaranteed>> ()
#32327 0x000055555562502a in <rustc_interface::interface::Compiler>::enter::<rustdoc::main_options::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>> ()
#32328 0x00005555554dd8aa in rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustdoc::main_options::{closure#0}>::{closure#1}> ()
#32329 0x000055555564e691 in rustc_interface::interface::create_compiler_and_run::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustdoc::main_options::{closure#0}> ()
#32330 0x00005555554e1d07 in <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustdoc::main_args::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>> ()
#32331 0x000055555564f4ef in std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustdoc::main_args::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>> ()



#32332 0x000055555573e029 in <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustdoc::main_args::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} ()

#32333 0x00007ffff36ab4f3 in alloc::boxed::{impl#44}::call_once<(), dyn core::ops::function::FnOnce<(), Output=()>, alloc::alloc::Global> () at library/alloc/src/boxed.rs:1951
#32334 alloc::boxed::{impl#44}::call_once<(), alloc::boxed::Box<dyn core::ops::function::FnOnce<(), Output=()>, alloc::alloc::Global>, alloc::alloc::Global> () at library/alloc/src/boxed.rs:1951
#32335 std::sys::unix::thread::{impl#2}::new::thread_start () at library/std/src/sys/unix/thread.rs:108
#32336 0x00007ffff347f54d in ?? () from /usr/lib/libc.so.6
#32337 0x00007ffff3504b14 in clone () from /usr/lib/libc.so.6

[JohnTitor]

Triage: This seems to be fixed in the latest nightly.
@rustbot labels: +E-needs-test