Open
Description
openedon Jul 19, 2023
Code
trait Www {
type W;
}
trait Xxx: Www<W = Self::X> {
type X;
}
trait Yyy: Xxx {}
trait Zzz<'a>: Yyy + Xxx<X = Self::Z> {
type Z;
}
trait Aaa {
type Y: Yyy;
}
trait Bbb: Aaa<Y = Self::B> {
type B: for<'a> Zzz<'a>;
}
impl<T> Bbb for T
where
T: Aaa,
T::Y: for<'a> Zzz<'a>,
{
type B = T::Y;
}The example will compile if the lifetime 'a of Zzz and all the associated HRTBs for Zzz are removed.
Meta
Error occurs for both stable, beta, and nightly. Code was tested in the playground.
Tested Versions:
stable: rustc 1.71.0 (8ede3aa 2023-07-12) running on x86_64-unknown-linux-gnu
nightly: rustc 1.73.0-nightly (0e8e857 2023-07-16) running on x86_64-unknown-linux-gnu
Error output
'`Ok([Binder(TraitPredicate(<<T as Aaa>::Y as Zzz<'a>>, polarity:Positive), [Region(BrNamed(DefId(0:18 ~ playground[90b5]::{impl#0}::'a), 'a))]), Binder(ProjectionPredicate(AliasTy { substs: [<T as Aaa>::Y], def_id: DefId(0:6 ~ playground[90b5]::Xxx::X) }, Term::Ty(<<T as Aaa>::Y as Zzz<'a>>::Z)), [Region(BrNamed(DefId(0:18 ~ playground[90b5]::{impl#0}::'a), 'a))]), Binder(TraitPredicate(<<T as Aaa>::Y as Xxx>, polarity:Positive), [Region(BrNamed(DefId(0:18 ~ playground[90b5]::{impl#0}::'a), 'a))]), Binder(ProjectionPredicate(AliasTy { substs: [<T as Aaa>::Y], def_id: DefId(0:4 ~ playground[90b5]::Www::W) }, Term::Ty(<<T as Aaa>::Y as Zzz<'_>>::Z)), [Region(BrNamed(DefId(0:18 ~ playground[90b5]::{impl#0}::'a), 'a))]), Binder(TraitPredicate(<<T as Aaa>::Y as Www>, polarity:Positive), [Region(BrNamed(DefId(0:18 ~ playground[90b5]::{impl#0}::'a), 'a))]), Binder(TraitPredicate(<<T as Aaa>::Y as Yyy>, polarity:Positive), [Region(BrNamed(DefId(0:18 ~ playground[90b5]::{impl#0}::'a), 'a))]), Binder(TraitPredicate(<T as Aaa>, polarity:Positive), []), Binder(TraitPredicate(<T as std::marker::Sized>, polarity:Positive), [])])` is not fully resolved', /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/compiler/rustc_infer/src/infer/mod.rs:1350:9
Backtrace
Compiling playground v0.0.1 (/playground)
thread 'rustc' panicked at '`Ok([Binder { value: TraitPredicate(<<T as Aaa>::Y as Zzz<'a>>, polarity:Positive), bound_vars: [Region(BrNamed(DefId(0:18 ~ playground[4866]::{impl#0}::'a), 'a))] }, Binder { value: ProjectionPredicate(AliasTy { args: [<T as Aaa>::Y], def_id: DefId(0:6 ~ playground[4866]::Xxx::X) }, Term::Ty(<<T as Aaa>::Y as Zzz<'a>>::Z)), bound_vars: [Region(BrNamed(DefId(0:18 ~ playground[4866]::{impl#0}::'a), 'a))] }, Binder { value: TraitPredicate(<<T as Aaa>::Y as Xxx>, polarity:Positive), bound_vars: [Region(BrNamed(DefId(0:18 ~ playground[4866]::{impl#0}::'a), 'a))] }, Binder { value: ProjectionPredicate(AliasTy { args: [<T as Aaa>::Y], def_id: DefId(0:4 ~ playground[4866]::Www::W) }, Term::Ty(<<T as Aaa>::Y as Zzz<'_>>::Z)), bound_vars: [Region(BrNamed(DefId(0:18 ~ playground[4866]::{impl#0}::'a), 'a))] }, Binder { value: TraitPredicate(<<T as Aaa>::Y as Www>, polarity:Positive), bound_vars: [Region(BrNamed(DefId(0:18 ~ playground[4866]::{impl#0}::'a), 'a))] }, Binder { value: TraitPredicate(<<T as Aaa>::Y as Yyy>, polarity:Positive), bound_vars: [Region(BrNamed(DefId(0:18 ~ playground[4866]::{impl#0}::'a), 'a))] }, Binder { value: TraitPredicate(<T as Aaa>, polarity:Positive), bound_vars: [] }, Binder { value: TraitPredicate(<T as std::marker::Sized>, polarity:Positive), bound_vars: [] }])` is not fully resolved', /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/compiler/rustc_infer/src/infer/mod.rs:1379:9
stack backtrace:
0: 0x7f6a8800b1e1 - std::backtrace_rs::backtrace::libunwind::trace::h5f856d2c12cc6674
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
1: 0x7f6a8800b1e1 - std::backtrace_rs::backtrace::trace_unsynchronized::h8449257397d4b934
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7f6a8800b1e1 - std::sys_common::backtrace::_print_fmt::hc0c3bab7873ac244
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/sys_common/backtrace.rs:65:5
3: 0x7f6a8800b1e1 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h3787c35683fa4233
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/sys_common/backtrace.rs:44:22
4: 0x7f6a8807119c - core::fmt::rt::Argument::fmt::hae0c3aa49888479e
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/core/src/fmt/rt.rs:138:9
5: 0x7f6a8807119c - core::fmt::write::h0f833d45d904ecbb
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/core/src/fmt/mod.rs:1094:21
6: 0x7f6a87ffdb8e - std::io::Write::write_fmt::h6fd13360259fea22
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/io/mod.rs:1714:15
7: 0x7f6a8800aff5 - std::sys_common::backtrace::_print::h715af68f97f33bd8
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/sys_common/backtrace.rs:47:5
8: 0x7f6a8800aff5 - std::sys_common::backtrace::print::h292b9e4a1d37eead
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/sys_common/backtrace.rs:34:9
9: 0x7f6a8800dda3 - std::panicking::default_hook::{{closure}}::hab7084ecbd5f7152
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/panicking.rs:269:22
10: 0x7f6a8800db34 - std::panicking::default_hook::hfbb8ba894af6577e
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/panicking.rs:288:9
11: 0x7f6a8b2d143b - rustc_driver_impl[5bf76b44b01c010b]::install_ice_hook::{closure#0}
12: 0x7f6a8800e5ce - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hc6428110305b5cbe
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/alloc/src/boxed.rs:2021:9
13: 0x7f6a8800e5ce - std::panicking::rust_panic_with_hook::h8a8f983a7c12e89b
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/panicking.rs:709:13
14: 0x7f6a8800e357 - std::panicking::begin_panic_handler::{{closure}}::hcbc604b49027ff32
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/panicking.rs:597:13
15: 0x7f6a8800b646 - std::sys_common::backtrace::__rust_end_short_backtrace::hb85256103978a5ea
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/sys_common/backtrace.rs:151:18
16: 0x7f6a8800e0a2 - rust_begin_unwind
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/panicking.rs:593:5
17: 0x7f6a8806d543 - core::panicking::panic_fmt::h3cc36a41bb894309
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/core/src/panicking.rs:67:14
18: 0x7f6a89be7ee2 - rustc_trait_selection[4828e09977927b86]::traits::normalize_param_env_or_error
19: 0x7f6a89be2e0c - rustc_ty_utils[ff0a06d2a6228635]::ty::param_env
20: 0x7f6a892f2474 - rustc_query_impl[2a0ca4be8ec05b8b]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2a0ca4be8ec05b8b]::query_impl::param_env::dynamic_query::{closure#2}::{closure#0}, rustc_middle[835d091ebc4d05d9]::query::erase::Erased<[u8; 8usize]>>
21: 0x7f6a892f2440 - <rustc_query_impl[2a0ca4be8ec05b8b]::query_impl::param_env::dynamic_query::{closure#2} as core[ef917bd033b821fa]::ops::function::FnOnce<(rustc_middle[835d091ebc4d05d9]::ty::context::TyCtxt, rustc_span[a69db53e102135]::def_id::DefId)>>::call_once
22: 0x7f6a893197f5 - rustc_query_system[95ed59712a59403e]::query::plumbing::try_execute_query::<rustc_query_impl[2a0ca4be8ec05b8b]::DynamicConfig<rustc_query_system[95ed59712a59403e]::query::caches::DefaultCache<rustc_span[a69db53e102135]::def_id::DefId, rustc_middle[835d091ebc4d05d9]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[2a0ca4be8ec05b8b]::plumbing::QueryCtxt, false>
23: 0x7f6a8ac3e601 - rustc_query_impl[2a0ca4be8ec05b8b]::query_impl::param_env::get_query_non_incr::__rust_end_short_backtrace
24: 0x7f6a89ece0d0 - rustc_middle[835d091ebc4d05d9]::query::plumbing::query_get_at::<rustc_query_system[95ed59712a59403e]::query::caches::DefaultCache<rustc_span[a69db53e102135]::def_id::DefId, rustc_middle[835d091ebc4d05d9]::query::erase::Erased<[u8; 8usize]>>>
25: 0x7f6a89ecc312 - rustc_hir_analysis[dc7bd52400bbf8cf]::check::wfcheck::check_well_formed
26: 0x7f6a892e065c - rustc_query_impl[2a0ca4be8ec05b8b]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2a0ca4be8ec05b8b]::query_impl::check_well_formed::dynamic_query::{closure#2}::{closure#0}, rustc_middle[835d091ebc4d05d9]::query::erase::Erased<[u8; 0usize]>>
27: 0x7f6a89d0a7f6 - rustc_query_system[95ed59712a59403e]::query::plumbing::try_execute_query::<rustc_query_impl[2a0ca4be8ec05b8b]::DynamicConfig<rustc_query_system[95ed59712a59403e]::query::caches::VecCache<rustc_hir[9bd7153587c508c5]::hir_id::OwnerId, rustc_middle[835d091ebc4d05d9]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[2a0ca4be8ec05b8b]::plumbing::QueryCtxt, false>
28: 0x7f6a89d0a562 - rustc_query_impl[2a0ca4be8ec05b8b]::query_impl::check_well_formed::get_query_non_incr::__rust_end_short_backtrace
29: 0x7f6a8a6a0cdc - rustc_data_structures[d2b76f525e315882]::sync::par_for_each_in::<&[rustc_hir[9bd7153587c508c5]::hir::ImplItemId], <rustc_middle[835d091ebc4d05d9]::hir::ModuleItems>::par_impl_items<rustc_hir_analysis[dc7bd52400bbf8cf]::check::wfcheck::check_mod_type_wf::{closure#1}>::{closure#0}>
30: 0x7f6a8a6a0b7a - rustc_hir_analysis[dc7bd52400bbf8cf]::check::wfcheck::check_mod_type_wf
31: 0x7f6a89ff6bbc - rustc_query_impl[2a0ca4be8ec05b8b]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2a0ca4be8ec05b8b]::query_impl::check_mod_type_wf::dynamic_query::{closure#2}::{closure#0}, rustc_middle[835d091ebc4d05d9]::query::erase::Erased<[u8; 0usize]>>
32: 0x7f6a89ff6b9e - <rustc_query_impl[2a0ca4be8ec05b8b]::query_impl::check_mod_type_wf::dynamic_query::{closure#2} as core[ef917bd033b821fa]::ops::function::FnOnce<(rustc_middle[835d091ebc4d05d9]::ty::context::TyCtxt, rustc_span[a69db53e102135]::def_id::LocalDefId)>>::call_once
33: 0x7f6a89c2b2ff - rustc_query_system[95ed59712a59403e]::query::plumbing::try_execute_query::<rustc_query_impl[2a0ca4be8ec05b8b]::DynamicConfig<rustc_query_system[95ed59712a59403e]::query::caches::VecCache<rustc_span[a69db53e102135]::def_id::LocalDefId, rustc_middle[835d091ebc4d05d9]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[2a0ca4be8ec05b8b]::plumbing::QueryCtxt, false>
34: 0x7f6a8ac1a662 - rustc_query_impl[2a0ca4be8ec05b8b]::query_impl::check_mod_type_wf::get_query_non_incr::__rust_end_short_backtrace
35: 0x7f6a8a6f1f27 - rustc_data_structures[d2b76f525e315882]::sync::par_for_each_in::<&[rustc_hir[9bd7153587c508c5]::hir_id::OwnerId], <rustc_middle[835d091ebc4d05d9]::hir::map::Map>::par_for_each_module<rustc_hir_analysis[dc7bd52400bbf8cf]::check_crate::{closure#5}::{closure#0}::{closure#0}>::{closure#0}>
36: 0x7f6a8a6f1cf7 - <rustc_session[2927e3ab783c954a]::session::Session>::track_errors::<rustc_hir_analysis[dc7bd52400bbf8cf]::check_crate::{closure#5}, ()>
37: 0x7f6a8a6f0aa8 - rustc_hir_analysis[dc7bd52400bbf8cf]::check_crate
38: 0x7f6a8a6f026a - rustc_interface[950bb6185283f172]::passes::analysis
39: 0x7f6a8a752f2a - rustc_query_impl[2a0ca4be8ec05b8b]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2a0ca4be8ec05b8b]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[835d091ebc4d05d9]::query::erase::Erased<[u8; 1usize]>>
40: 0x7f6a8a752f19 - <rustc_query_impl[2a0ca4be8ec05b8b]::query_impl::analysis::dynamic_query::{closure#2} as core[ef917bd033b821fa]::ops::function::FnOnce<(rustc_middle[835d091ebc4d05d9]::ty::context::TyCtxt, ())>>::call_once
41: 0x7f6a8a91df48 - rustc_query_system[95ed59712a59403e]::query::plumbing::try_execute_query::<rustc_query_impl[2a0ca4be8ec05b8b]::DynamicConfig<rustc_query_system[95ed59712a59403e]::query::caches::SingleCache<rustc_middle[835d091ebc4d05d9]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[2a0ca4be8ec05b8b]::plumbing::QueryCtxt, false>
42: 0x7f6a8a91dd27 - rustc_query_impl[2a0ca4be8ec05b8b]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
43: 0x7f6a8a5a2e85 - <rustc_middle[835d091ebc4d05d9]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[5bf76b44b01c010b]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[ef917bd033b821fa]::result::Result<(), rustc_span[a69db53e102135]::ErrorGuaranteed>>
44: 0x7f6a8a5a24b2 - <rustc_interface[950bb6185283f172]::interface::Compiler>::enter::<rustc_driver_impl[5bf76b44b01c010b]::run_compiler::{closure#1}::{closure#2}, core[ef917bd033b821fa]::result::Result<core[ef917bd033b821fa]::option::Option<rustc_interface[950bb6185283f172]::queries::Linker>, rustc_span[a69db53e102135]::ErrorGuaranteed>>
45: 0x7f6a8a59b825 - rustc_span[a69db53e102135]::set_source_map::<core[ef917bd033b821fa]::result::Result<(), rustc_span[a69db53e102135]::ErrorGuaranteed>, rustc_interface[950bb6185283f172]::interface::run_compiler<core[ef917bd033b821fa]::result::Result<(), rustc_span[a69db53e102135]::ErrorGuaranteed>, rustc_driver_impl[5bf76b44b01c010b]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
46: 0x7f6a8a59b296 - <scoped_tls[af683b2dcd27050]::ScopedKey<rustc_span[a69db53e102135]::SessionGlobals>>::set::<rustc_interface[950bb6185283f172]::interface::run_compiler<core[ef917bd033b821fa]::result::Result<(), rustc_span[a69db53e102135]::ErrorGuaranteed>, rustc_driver_impl[5bf76b44b01c010b]::run_compiler::{closure#1}>::{closure#0}, core[ef917bd033b821fa]::result::Result<(), rustc_span[a69db53e102135]::ErrorGuaranteed>>
47: 0x7f6a8a59a85c - std[c0adc0b90f4efda2]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[950bb6185283f172]::util::run_in_thread_pool_with_globals<rustc_interface[950bb6185283f172]::interface::run_compiler<core[ef917bd033b821fa]::result::Result<(), rustc_span[a69db53e102135]::ErrorGuaranteed>, rustc_driver_impl[5bf76b44b01c010b]::run_compiler::{closure#1}>::{closure#0}, core[ef917bd033b821fa]::result::Result<(), rustc_span[a69db53e102135]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[ef917bd033b821fa]::result::Result<(), rustc_span[a69db53e102135]::ErrorGuaranteed>>
48: 0x7f6a8a59a61e - <<std[c0adc0b90f4efda2]::thread::Builder>::spawn_unchecked_<rustc_interface[950bb6185283f172]::util::run_in_thread_pool_with_globals<rustc_interface[950bb6185283f172]::interface::run_compiler<core[ef917bd033b821fa]::result::Result<(), rustc_span[a69db53e102135]::ErrorGuaranteed>, rustc_driver_impl[5bf76b44b01c010b]::run_compiler::{closure#1}>::{closure#0}, core[ef917bd033b821fa]::result::Result<(), rustc_span[a69db53e102135]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[ef917bd033b821fa]::result::Result<(), rustc_span[a69db53e102135]::ErrorGuaranteed>>::{closure#1} as core[ef917bd033b821fa]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
49: 0x7f6a88018c55 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hee3992ac1361b768
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/alloc/src/boxed.rs:2007:9
50: 0x7f6a88018c55 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h98eb33f4039b4e2e
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/alloc/src/boxed.rs:2007:9
51: 0x7f6a88018c55 - std::sys::unix::thread::Thread::new::thread_start::h4a5bbbf722280c2f
at /rustc/0e8e857b11f60a785aea24a84f280f6dad7a4d42/library/std/src/sys/unix/thread.rs:108:17
52: 0x7f6a87edf609 - start_thread
53: 0x7f6a87e02133 - clone
54: 0x0 - <unknown>
error: 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 1.73.0-nightly (0e8e857b1 2023-07-16) 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:
#0 [param_env] computing normalized predicates of `<impl at src/lib.rs:23:1: 23:18>`
#1 [check_well_formed] checking that `<impl at src/lib.rs:23:1: 23:18>` is well-formed
#2 [check_mod_type_wf] checking that types are well-formed in top-level module
#3 [analysis] running analysis passes on this crate
end of query stack
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Category: This is a bug.Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Medium priorityStatus: This bug is tracked inside the repo by a `known-bug` test.Relevant to the compiler team, which will review and decide on the PR/issue.Performance or correctness regression from one stable version to another.