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ICE: asked to assemble builtin bounds of unexpected type: Placeholder(Placeholder { ... non_lifetime_binders #108180

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matthiaskrgr opened this issue Feb 17, 2023 · 4 comments · Fixed by #108189
Closed

ICE: asked to assemble builtin bounds of unexpected type: Placeholder(Placeholder { ... non_lifetime_binders #108180

matthiaskrgr opened this issue Feb 17, 2023 · 4 comments · Fixed by #108189
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@compiler-errors
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C-bug Category: This is a bug. F-non_lifetime_binders `#![feature(non_lifetime_binders)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@matthiaskrgr
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matthiaskrgr commented Feb 17, 2023 •
edited

Code

#![feature(non_lifetime_binders)]
pub fn V<V>(value: &V) -> Result<String, &Ok>{}

Meta

rustc --version --verbose:

rustc 1.69.0-nightly (f4f5fc3e5 2023-02-17)
binary: rustc
commit-hash: f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3
commit-date: 2023-02-17
host: x86_64-unknown-linux-gnu
release: 1.69.0-nightly
LLVM version: 15.0.7

Error output

meh
Backtrace 

error: internal compiler error: compiler/rustc_trait_selection/src/traits/select/mod.rs:2157:17: asked to assemble builtin bounds of unexpected type: Placeholder(Placeholder { universe: U1, name: Param(DefId(0:5 ~ 9d3cc313aa5fe95f721ef30c9a732644292ba048[7297]::V::V#1), "V") })

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/compiler/rustc_errors/src/lib.rs:1642:9
stack backtrace:
   0:     0x7f6e04b6aa5a - std::backtrace_rs::backtrace::libunwind::trace::hebe09041f884c65d
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f6e04b6aa5a - std::backtrace_rs::backtrace::trace_unsynchronized::h546f6c63cbbce5a9
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f6e04b6aa5a - std::sys_common::backtrace::_print_fmt::h2559cb0cfed7a617
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f6e04b6aa5a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1fb4eaaaafa2d72a
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f6e04bca9ae - core::fmt::write::hbaef4432b3c9d07b
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/core/src/fmt/mod.rs:1232:17
   5:     0x7f6e04b5ae05 - std::io::Write::write_fmt::h1f8dce362441faaa
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/std/src/io/mod.rs:1684:15
   6:     0x7f6e04b6a825 - std::sys_common::backtrace::_print::hc0e92ab849a4f4e1
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7f6e04b6a825 - std::sys_common::backtrace::print::h878cd11684ebdec3
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7f6e04b6d59f - std::panicking::default_hook::{{closure}}::h2ea8a6875aa6312d
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/std/src/panicking.rs:267:22
   9:     0x7f6e04b6d2db - std::panicking::default_hook::h9e42277a84072188
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/std/src/panicking.rs:286:9
  10:     0x7f6e07e6e7b4 - <rustc_driver_impl[afa3c304d692170b]::DEFAULT_HOOK::{closure#0}::{closure#0} as core[ebab21900c9c0a2]::ops::function::FnOnce<(&core[ebab21900c9c0a2]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  11:     0x7f6e04b6dddd - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h2c34f129ed413128
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/alloc/src/boxed.rs:2002:9
  12:     0x7f6e04b6dddd - std::panicking::rust_panic_with_hook::h4c799b8c4fc0a70b
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/std/src/panicking.rs:692:13
  13:     0x7f6e084274a1 - std[dc63ca99f82ce43d]::panicking::begin_panic::<rustc_errors[faa449d960b5ce55]::ExplicitBug>::{closure#0}
  14:     0x7f6e0841f116 - std[dc63ca99f82ce43d]::sys_common::backtrace::__rust_end_short_backtrace::<std[dc63ca99f82ce43d]::panicking::begin_panic<rustc_errors[faa449d960b5ce55]::ExplicitBug>::{closure#0}, !>
  15:     0x7f6e08379fe6 - std[dc63ca99f82ce43d]::panicking::begin_panic::<rustc_errors[faa449d960b5ce55]::ExplicitBug>
  16:     0x7f6e0841ed96 - std[dc63ca99f82ce43d]::panic::panic_any::<rustc_errors[faa449d960b5ce55]::ExplicitBug>
  17:     0x7f6e0841d906 - <rustc_errors[faa449d960b5ce55]::HandlerInner>::bug::<&alloc[d840872249f3dc84]::string::String>
  18:     0x7f6e0841d5d0 - <rustc_errors[faa449d960b5ce55]::Handler>::bug::<&alloc[d840872249f3dc84]::string::String>
  19:     0x7f6e08484b1b - rustc_middle[6caff671bb338453]::util::bug::opt_span_bug_fmt::<rustc_span[1010a352e5466fad]::span_encoding::Span>::{closure#0}
  20:     0x7f6e084842da - rustc_middle[6caff671bb338453]::ty::context::tls::with_opt::<rustc_middle[6caff671bb338453]::util::bug::opt_span_bug_fmt<rustc_span[1010a352e5466fad]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7f6e084842a6 - rustc_middle[6caff671bb338453]::ty::context::tls::with_context_opt::<rustc_middle[6caff671bb338453]::ty::context::tls::with_opt<rustc_middle[6caff671bb338453]::util::bug::opt_span_bug_fmt<rustc_span[1010a352e5466fad]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7f6e08484a66 - rustc_middle[6caff671bb338453]::util::bug::opt_span_bug_fmt::<rustc_span[1010a352e5466fad]::span_encoding::Span>
  23:     0x7f6e06141083 - rustc_middle[6caff671bb338453]::util::bug::bug_fmt
  24:     0x7f6e06185906 - <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::assemble_candidates
  25:     0x7f6e0615a9fe - <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::candidate_from_obligation_no_cache
  26:     0x7f6e06b48ac2 - <rustc_query_system[5ff89444bbfc32f5]::dep_graph::graph::DepGraph<rustc_middle[6caff671bb338453]::dep_graph::dep_node::DepKind>>::with_anon_task::<rustc_middle[6caff671bb338453]::ty::context::TyCtxt, <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::in_task<<rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::candidate_from_obligation::{closure#0}::{closure#0}, core[ebab21900c9c0a2]::result::Result<core[ebab21900c9c0a2]::option::Option<rustc_middle[6caff671bb338453]::traits::select::SelectionCandidate>, rustc_middle[6caff671bb338453]::traits::SelectionError>>::{closure#0}, core[ebab21900c9c0a2]::result::Result<core[ebab21900c9c0a2]::option::Option<rustc_middle[6caff671bb338453]::traits::select::SelectionCandidate>, rustc_middle[6caff671bb338453]::traits::SelectionError>>
  27:     0x7f6e06b43530 - <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::evaluate_stack
  28:     0x7f6e06b418d8 - <rustc_query_system[5ff89444bbfc32f5]::dep_graph::graph::DepGraph<rustc_middle[6caff671bb338453]::dep_graph::dep_node::DepKind>>::with_anon_task::<rustc_middle[6caff671bb338453]::ty::context::TyCtxt, <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::in_task<<rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::evaluate_trait_predicate_recursively::{closure#0}::{closure#2}, core[ebab21900c9c0a2]::result::Result<rustc_middle[6caff671bb338453]::traits::select::EvaluationResult, rustc_middle[6caff671bb338453]::traits::select::OverflowError>>::{closure#0}, core[ebab21900c9c0a2]::result::Result<rustc_middle[6caff671bb338453]::traits::select::EvaluationResult, rustc_middle[6caff671bb338453]::traits::select::OverflowError>>
  29:     0x7f6e06b3c9e7 - <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::evaluate_predicates_recursively::<alloc[d840872249f3dc84]::vec::into_iter::IntoIter<rustc_infer[92cb48f58201d890]::traits::Obligation<rustc_middle[6caff671bb338453]::ty::Predicate>>>
  30:     0x7f6e06b3a29d - <rustc_infer[92cb48f58201d890]::infer::InferCtxt>::probe::<core[ebab21900c9c0a2]::result::Result<rustc_middle[6caff671bb338453]::traits::select::EvaluationResult, rustc_middle[6caff671bb338453]::traits::select::OverflowError>, <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::evaluation_probe<<rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::evaluate_candidate::{closure#0}::{closure#0}>::{closure#0}>
  31:     0x7f6e0617e798 - <alloc[d840872249f3dc84]::vec::Vec<rustc_trait_selection[b19fab792c1f9feb]::traits::select::EvaluatedCandidate> as alloc[d840872249f3dc84]::vec::spec_from_iter::SpecFromIter<rustc_trait_selection[b19fab792c1f9feb]::traits::select::EvaluatedCandidate, core[ebab21900c9c0a2]::iter::adapters::GenericShunt<core[ebab21900c9c0a2]::iter::adapters::flatten::FlatMap<core[ebab21900c9c0a2]::iter::adapters::map::Map<alloc[d840872249f3dc84]::vec::into_iter::IntoIter<rustc_middle[6caff671bb338453]::traits::select::SelectionCandidate>, <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::candidate_from_obligation_no_cache::{closure#0}>, core[ebab21900c9c0a2]::option::Option<core[ebab21900c9c0a2]::result::Result<rustc_trait_selection[b19fab792c1f9feb]::traits::select::EvaluatedCandidate, rustc_middle[6caff671bb338453]::traits::SelectionError>>, <core[ebab21900c9c0a2]::result::Result<core[ebab21900c9c0a2]::option::Option<rustc_trait_selection[b19fab792c1f9feb]::traits::select::EvaluatedCandidate>, rustc_middle[6caff671bb338453]::traits::SelectionError>>::transpose>, core[ebab21900c9c0a2]::result::Result<core[ebab21900c9c0a2]::convert::Infallible, rustc_middle[6caff671bb338453]::traits::SelectionError>>>>::from_iter
  32:     0x7f6e0615b169 - <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::candidate_from_obligation_no_cache
  33:     0x7f6e06b48ac2 - <rustc_query_system[5ff89444bbfc32f5]::dep_graph::graph::DepGraph<rustc_middle[6caff671bb338453]::dep_graph::dep_node::DepKind>>::with_anon_task::<rustc_middle[6caff671bb338453]::ty::context::TyCtxt, <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::in_task<<rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::candidate_from_obligation::{closure#0}::{closure#0}, core[ebab21900c9c0a2]::result::Result<core[ebab21900c9c0a2]::option::Option<rustc_middle[6caff671bb338453]::traits::select::SelectionCandidate>, rustc_middle[6caff671bb338453]::traits::SelectionError>>::{closure#0}, core[ebab21900c9c0a2]::result::Result<core[ebab21900c9c0a2]::option::Option<rustc_middle[6caff671bb338453]::traits::select::SelectionCandidate>, rustc_middle[6caff671bb338453]::traits::SelectionError>>
  34:     0x7f6e06b43530 - <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::evaluate_stack
  35:     0x7f6e06b418d8 - <rustc_query_system[5ff89444bbfc32f5]::dep_graph::graph::DepGraph<rustc_middle[6caff671bb338453]::dep_graph::dep_node::DepKind>>::with_anon_task::<rustc_middle[6caff671bb338453]::ty::context::TyCtxt, <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::in_task<<rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::evaluate_trait_predicate_recursively::{closure#0}::{closure#2}, core[ebab21900c9c0a2]::result::Result<rustc_middle[6caff671bb338453]::traits::select::EvaluationResult, rustc_middle[6caff671bb338453]::traits::select::OverflowError>>::{closure#0}, core[ebab21900c9c0a2]::result::Result<rustc_middle[6caff671bb338453]::traits::select::EvaluationResult, rustc_middle[6caff671bb338453]::traits::select::OverflowError>>
  36:     0x7f6e069aaf1d - <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::evaluate_predicate_recursively
  37:     0x7f6e069a89d3 - <rustc_infer[92cb48f58201d890]::infer::InferCtxt>::probe::<core[ebab21900c9c0a2]::result::Result<rustc_middle[6caff671bb338453]::traits::select::EvaluationResult, rustc_middle[6caff671bb338453]::traits::select::OverflowError>, <rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::evaluation_probe<<rustc_trait_selection[b19fab792c1f9feb]::traits::select::SelectionContext>::evaluate_root_obligation::{closure#0}>::{closure#0}>
  38:     0x7f6e064e76ae - rustc_traits[a45c351126c3b9ce]::evaluate_obligation::evaluate_obligation
  39:     0x7f6e064e2f66 - rustc_query_system[5ff89444bbfc32f5]::query::plumbing::get_query::<rustc_query_impl[ef929ccf3c28623b]::queries::evaluate_obligation, rustc_query_impl[ef929ccf3c28623b]::plumbing::QueryCtxt, rustc_middle[6caff671bb338453]::dep_graph::dep_node::DepKind>
  40:     0x7f6e061a7645 - <rustc_infer[92cb48f58201d890]::infer::InferCtxt as rustc_trait_selection[b19fab792c1f9feb]::traits::query::evaluate_obligation::InferCtxtExt>::predicate_must_hold_considering_regions
  41:     0x7f6e0610011b - <rustc_trait_selection[b19fab792c1f9feb]::traits::fulfill::FulfillProcessor as rustc_data_structures[cd995ba5556f5758]::obligation_forest::ObligationProcessor>::process_obligation
  42:     0x7f6e060f8d0f - <rustc_data_structures[cd995ba5556f5758]::obligation_forest::ObligationForest<rustc_trait_selection[b19fab792c1f9feb]::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection[b19fab792c1f9feb]::traits::fulfill::FulfillProcessor>
  43:     0x7f6e060f87c8 - <rustc_trait_selection[b19fab792c1f9feb]::traits::fulfill::FulfillmentContext as rustc_infer[92cb48f58201d890]::traits::engine::TraitEngine>::select_where_possible
  44:     0x7f6e060e3940 - <rustc_hir_typeck[59924f8822ff3497]::fn_ctxt::FnCtxt>::check_argument_types
  45:     0x7f6e060b8151 - <rustc_hir_typeck[59924f8822ff3497]::fn_ctxt::FnCtxt>::check_call
  46:     0x7f6e061fb001 - <rustc_hir_typeck[59924f8822ff3497]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  47:     0x7f6e06225080 - <rustc_hir_typeck[59924f8822ff3497]::fn_ctxt::FnCtxt>::check_block_with_expected
  48:     0x7f6e061fb52e - <rustc_hir_typeck[59924f8822ff3497]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  49:     0x7f6e065b689b - <rustc_hir_typeck[59924f8822ff3497]::fn_ctxt::FnCtxt>::check_return_expr
  50:     0x7f6e065aeb12 - rustc_hir_typeck[59924f8822ff3497]::check::check_fn
  51:     0x7f6e06598ef2 - <rustc_hir_typeck[59924f8822ff3497]::inherited::InheritedBuilder>::enter::<rustc_hir_typeck[59924f8822ff3497]::typeck_with_fallback<rustc_hir_typeck[59924f8822ff3497]::typeck::{closure#0}>::{closure#0}::{closure#1}, &rustc_middle[6caff671bb338453]::ty::typeck_results::TypeckResults>
  52:     0x7f6e0658da16 - rustc_hir_typeck[59924f8822ff3497]::typeck
  53:     0x7f6e0658c113 - rustc_query_system[5ff89444bbfc32f5]::query::plumbing::try_execute_query::<rustc_query_impl[ef929ccf3c28623b]::queries::typeck, rustc_query_impl[ef929ccf3c28623b]::plumbing::QueryCtxt>
  54:     0x7f6e075f0f8b - rustc_data_structures[cd995ba5556f5758]::sync::par_for_each_in::<&[rustc_span[1010a352e5466fad]::def_id::LocalDefId], <rustc_middle[6caff671bb338453]::hir::map::Map>::par_body_owners<rustc_hir_typeck[59924f8822ff3497]::typeck_item_bodies::{closure#0}>::{closure#0}>
  55:     0x7f6e075f0dcf - rustc_hir_typeck[59924f8822ff3497]::typeck_item_bodies
  56:     0x7f6e0746fca3 - rustc_query_system[5ff89444bbfc32f5]::query::plumbing::try_execute_query::<rustc_query_impl[ef929ccf3c28623b]::queries::typeck_item_bodies, rustc_query_impl[ef929ccf3c28623b]::plumbing::QueryCtxt>
  57:     0x7f6e0786e59b - <rustc_query_impl[ef929ccf3c28623b]::Queries as rustc_middle[6caff671bb338453]::ty::query::QueryEngine>::typeck_item_bodies
  58:     0x7f6e063136a3 - <rustc_session[66793dd6b8780a4a]::session::Session>::time::<(), rustc_hir_analysis[257f64c795d1d076]::check_crate::{closure#7}>
  59:     0x7f6e063106a2 - rustc_hir_analysis[257f64c795d1d076]::check_crate
  60:     0x7f6e06306062 - rustc_interface[686dab9608bc6033]::passes::analysis
  61:     0x7f6e07663d92 - rustc_query_system[5ff89444bbfc32f5]::query::plumbing::try_execute_query::<rustc_query_impl[ef929ccf3c28623b]::queries::analysis, rustc_query_impl[ef929ccf3c28623b]::plumbing::QueryCtxt>
  62:     0x7f6e07867e2a - <rustc_query_impl[ef929ccf3c28623b]::Queries as rustc_middle[6caff671bb338453]::ty::query::QueryEngine>::analysis
  63:     0x7f6e07080303 - <rustc_interface[686dab9608bc6033]::queries::QueryResult<&rustc_middle[6caff671bb338453]::ty::context::GlobalCtxt>>::enter::<core[ebab21900c9c0a2]::result::Result<(), rustc_errors[faa449d960b5ce55]::ErrorGuaranteed>, rustc_driver_impl[afa3c304d692170b]::run_compiler::{closure#1}::{closure#2}::{closure#3}>
  64:     0x7f6e0707f4d4 - <rustc_interface[686dab9608bc6033]::interface::Compiler>::enter::<rustc_driver_impl[afa3c304d692170b]::run_compiler::{closure#1}::{closure#2}, core[ebab21900c9c0a2]::result::Result<core[ebab21900c9c0a2]::option::Option<rustc_interface[686dab9608bc6033]::queries::Linker>, rustc_errors[faa449d960b5ce55]::ErrorGuaranteed>>
  65:     0x7f6e0707a6f4 - rustc_span[1010a352e5466fad]::with_source_map::<core[ebab21900c9c0a2]::result::Result<(), rustc_errors[faa449d960b5ce55]::ErrorGuaranteed>, rustc_interface[686dab9608bc6033]::interface::run_compiler<core[ebab21900c9c0a2]::result::Result<(), rustc_errors[faa449d960b5ce55]::ErrorGuaranteed>, rustc_driver_impl[afa3c304d692170b]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  66:     0x7f6e0707a204 - <scoped_tls[d487b98c36b0d138]::ScopedKey<rustc_span[1010a352e5466fad]::SessionGlobals>>::set::<rustc_interface[686dab9608bc6033]::interface::run_compiler<core[ebab21900c9c0a2]::result::Result<(), rustc_errors[faa449d960b5ce55]::ErrorGuaranteed>, rustc_driver_impl[afa3c304d692170b]::run_compiler::{closure#1}>::{closure#0}, core[ebab21900c9c0a2]::result::Result<(), rustc_errors[faa449d960b5ce55]::ErrorGuaranteed>>
  67:     0x7f6e07079902 - std[dc63ca99f82ce43d]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[686dab9608bc6033]::util::run_in_thread_pool_with_globals<rustc_interface[686dab9608bc6033]::interface::run_compiler<core[ebab21900c9c0a2]::result::Result<(), rustc_errors[faa449d960b5ce55]::ErrorGuaranteed>, rustc_driver_impl[afa3c304d692170b]::run_compiler::{closure#1}>::{closure#0}, core[ebab21900c9c0a2]::result::Result<(), rustc_errors[faa449d960b5ce55]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[ebab21900c9c0a2]::result::Result<(), rustc_errors[faa449d960b5ce55]::ErrorGuaranteed>>
  68:     0x7f6e070796ac - <<std[dc63ca99f82ce43d]::thread::Builder>::spawn_unchecked_<rustc_interface[686dab9608bc6033]::util::run_in_thread_pool_with_globals<rustc_interface[686dab9608bc6033]::interface::run_compiler<core[ebab21900c9c0a2]::result::Result<(), rustc_errors[faa449d960b5ce55]::ErrorGuaranteed>, rustc_driver_impl[afa3c304d692170b]::run_compiler::{closure#1}>::{closure#0}, core[ebab21900c9c0a2]::result::Result<(), rustc_errors[faa449d960b5ce55]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[ebab21900c9c0a2]::result::Result<(), rustc_errors[faa449d960b5ce55]::ErrorGuaranteed>>::{closure#1} as core[ebab21900c9c0a2]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  69:     0x7f6e04b77c63 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9fd36c4a0ba5b15d
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/alloc/src/boxed.rs:1988:9
  70:     0x7f6e04b77c63 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd37d267854c7434f
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/alloc/src/boxed.rs:1988:9
  71:     0x7f6e04b77c63 - std::sys::unix::thread::Thread::new::thread_start::h1ff24d5a09f2a8be
                               at /rustc/f4f5fc3e5cc70b7a43bf7b518c455f3d9bada9e3/library/std/src/sys/unix/thread.rs:108:17
  72:     0x7f6e04907bb5 - <unknown>
  73:     0x7f6e04989d90 - <unknown>
  74:                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 (f4f5fc3e5 2023-02-17) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z crate-attr=feature(non_lifetime_binders)

query stack during panic:
#0 [evaluate_obligation] evaluating trait selection obligation `V: core::iter::traits::collect::IntoIterator`
#1 [typeck] type-checking `V`
#2 [typeck_item_bodies] type-checking all item bodies
#3 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 22 previous errors; 2 warnings emitted

Some errors have detailed explanations: E0261, E0428, E0573, E0576, E0601, E0637.
For more information about an error, try `rustc --explain E0261`.

@matthiaskrgr matthiaskrgr added I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. C-bug Category: This is a bug. S-has-mcve Status: A Minimal Complete and Verifiable Example has been found for this issue labels Feb 17, 2023
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compiler-errors commented Feb 17, 2023 •
edited

I can't reproduce this? On master, that is.

@matthiaskrgr
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Ah oops, looks like I minimized wrongly, give me a sec...

@compiler-errors compiler-errors removed the S-has-mcve Status: A Minimal Complete and Verifiable Example has been found for this issue label Feb 17, 2023
@matthiaskrgr
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This should do:

#![feature(non_lifetime_binders)]
#![crate_type = "lib"]

pub fn String<V>(elem)
where
    V: 'a,
    for<V> V: IntoIterator,
    for<value> <&str as IntoIterator>::Item: 'a + 'static,
{
        let csv_str: value = String.into_iter().elem::<String>();
}

fn main() {}

@compiler-errors
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compiler-errors commented Feb 17, 2023 •
edited

Minimized --

#![feature(non_lifetime_binders)]

pub fn foo()
where
    for<V> V: Sized,
{
}

fn main() {
    foo();
}

PR coming up.

@compiler-errors compiler-errors mentioned this issue Feb 17, 2023
Merged
@estebank estebank added the F-non_lifetime_binders `#![feature(non_lifetime_binders)]` label Feb 18, 2023
@bors bors closed this as completed in c5d5c57 Feb 19, 2023
@compiler-errors compiler-errors self-assigned this Mar 16, 2023
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C-bug Category: This is a bug. F-non_lifetime_binders `#![feature(non_lifetime_binders)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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Fix some more non_lifetime_binders stuff with higher-ranked trait bounds compiler-errors/rust
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