ICE: type parameter out of range when substituting

[matthiaskrgr]

Code

#![feature(generic_const_exprs)]
#![feature(inline_const)]
#![allow(incomplete_features)]

pub struct ConstDefaultUnstable<const N: usize = { const {3} }>;

pub fn main() {}

Meta

rustc --version --verbose:

rustc 1.68.0-nightly (0f529f0f4 2022-12-13)
binary: rustc
commit-hash: 0f529f0f49f4dd404b78e605398531c96f220fc5
commit-date: 2022-12-13
host: x86_64-unknown-linux-gnu
release: 1.68.0-nightly
LLVM version: 15.0.6

Error output

<output>

Backtrace

error: internal compiler error: compiler/rustc_middle/src/ty/subst.rs:827:9: type parameter `<const_ty>/#1` (<const_ty>/1) out of range when substituting, substs=[usize]

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/compiler/rustc_errors/src/lib.rs:1576:9
stack backtrace:
   0:     0x7f5a2660638a - std::backtrace_rs::backtrace::libunwind::trace::h7785c191eb7ee216
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f5a2660638a - std::backtrace_rs::backtrace::trace_unsynchronized::hf351b38b6771dec4
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f5a2660638a - std::sys_common::backtrace::_print_fmt::h713ede78758becef
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f5a2660638a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1878899793c73488
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f5a225c92ee - core::fmt::write::h13bbbc03afcba1c1
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/core/src/fmt/mod.rs:1208:17
   5:     0x7f5a265fa555 - std::io::Write::write_fmt::hfb2ca3e9f8803080
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/std/src/io/mod.rs:1682:15
   6:     0x7f5a26606155 - std::sys_common::backtrace::_print::hd117bfadcc3f249e
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7f5a26606155 - std::sys_common::backtrace::print::h7e9c04ba80eb0074
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7f5a266084df - std::panicking::default_hook::{{closure}}::hb29d3d4cad77f77b
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/std/src/panicking.rs:267:22
   9:     0x7f5a2660821b - std::panicking::default_hook::hb9cd54f32e45cbdf
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/std/src/panicking.rs:286:9
  10:     0x7f5a2583c6f1 - rustc_driver[a18c018241618262]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7f5a26608cdd - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h7096ae9426bf0ef4
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/alloc/src/boxed.rs:2032:9
  12:     0x7f5a26608cdd - std::panicking::rust_panic_with_hook::heec3062a77321665
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/std/src/panicking.rs:692:13
  13:     0x7f5a25cd8de1 - std[e2221f2923982408]::panicking::begin_panic::<rustc_errors[55c94f74a3e69376]::ExplicitBug>::{closure#0}
  14:     0x7f5a25cd8866 - std[e2221f2923982408]::sys_common::backtrace::__rust_end_short_backtrace::<std[e2221f2923982408]::panicking::begin_panic<rustc_errors[55c94f74a3e69376]::ExplicitBug>::{closure#0}, !>
  15:     0x7f5a25d12376 - std[e2221f2923982408]::panicking::begin_panic::<rustc_errors[55c94f74a3e69376]::ExplicitBug>
  16:     0x7f5a25cd8856 - std[e2221f2923982408]::panic::panic_any::<rustc_errors[55c94f74a3e69376]::ExplicitBug>
  17:     0x7f5a25cd4ee6 - <rustc_errors[55c94f74a3e69376]::HandlerInner>::bug::<&alloc[89c3e70836bb9ff9]::string::String>
  18:     0x7f5a25cd4b50 - <rustc_errors[55c94f74a3e69376]::Handler>::bug::<&alloc[89c3e70836bb9ff9]::string::String>
  19:     0x7f5a25cb69be - rustc_middle[fb11b19bba64d848]::ty::context::tls::with_context_opt::<rustc_middle[fb11b19bba64d848]::ty::context::tls::with_opt<rustc_middle[fb11b19bba64d848]::util::bug::opt_span_bug_fmt<rustc_span[22b27358efe64712]::span_encoding::Span>::{closure#0}, ()>::{closure#0}, ()>
  20:     0x7f5a25cb7e26 - rustc_middle[fb11b19bba64d848]::util::bug::opt_span_bug_fmt::<rustc_span[22b27358efe64712]::span_encoding::Span>
  21:     0x7f5a23b49ed3 - rustc_middle[fb11b19bba64d848]::util::bug::bug_fmt
  22:     0x7f5a25d0912e - <rustc_middle[fb11b19bba64d848]::ty::subst::SubstFolder>::type_param_out_of_range
  23:     0x7f5a249815f6 - rustc_traits[e6288d48f676fd87]::type_op::type_op_ascribe_user_type_with_span
  24:     0x7f5a24980290 - <rustc_infer[436d8bad8048b04b]::infer::InferCtxtBuilder as rustc_trait_selection[1e153bf3b090dfe7]::infer::InferCtxtBuilderExt>::enter_canonical_trait_query::<rustc_middle[fb11b19bba64d848]::ty::ParamEnvAnd<rustc_middle[fb11b19bba64d848]::traits::query::type_op::AscribeUserType>, (), rustc_traits[e6288d48f676fd87]::type_op::type_op_ascribe_user_type::{closure#0}>
  25:     0x7f5a2497ff91 - rustc_traits[e6288d48f676fd87]::type_op::type_op_ascribe_user_type
  26:     0x7f5a24bad761 - rustc_query_system[d35528287009336b]::query::plumbing::try_execute_query::<rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt, rustc_query_system[d35528287009336b]::query::caches::DefaultCache<rustc_middle[fb11b19bba64d848]::infer::canonical::Canonical<rustc_middle[fb11b19bba64d848]::ty::ParamEnvAnd<rustc_middle[fb11b19bba64d848]::traits::query::type_op::AscribeUserType>>, core[454b920cfc772497]::result::Result<&rustc_middle[fb11b19bba64d848]::infer::canonical::Canonical<rustc_middle[fb11b19bba64d848]::infer::canonical::QueryResponse<()>>, rustc_middle[fb11b19bba64d848]::traits::query::NoSolution>>>
  27:     0x7f5a24bad26e - rustc_query_system[d35528287009336b]::query::plumbing::get_query::<rustc_query_impl[f9ce7d291822ba8c]::queries::type_op_ascribe_user_type, rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt>
  28:     0x7f5a24bad1a3 - <rustc_query_impl[f9ce7d291822ba8c]::Queries as rustc_middle[fb11b19bba64d848]::ty::query::QueryEngine>::type_op_ascribe_user_type
  29:     0x7f5a245ef2f3 - <rustc_middle[fb11b19bba64d848]::traits::query::type_op::AscribeUserType as rustc_trait_selection[1e153bf3b090dfe7]::traits::query::type_op::QueryTypeOp>::perform_query
  30:     0x7f5a245ed0af - <rustc_middle[fb11b19bba64d848]::traits::query::type_op::AscribeUserType as rustc_trait_selection[1e153bf3b090dfe7]::traits::query::type_op::QueryTypeOp>::fully_perform_into
  31:     0x7f5a245ea594 - <rustc_middle[fb11b19bba64d848]::ty::ParamEnvAnd<rustc_middle[fb11b19bba64d848]::traits::query::type_op::AscribeUserType> as rustc_trait_selection[1e153bf3b090dfe7]::traits::query::type_op::TypeOp>::fully_perform
  32:     0x7f5a245e9e88 - <rustc_borrowck[321066d147c467a7]::type_check::TypeChecker>::fully_perform_op::<(), rustc_middle[fb11b19bba64d848]::ty::ParamEnvAnd<rustc_middle[fb11b19bba64d848]::traits::query::type_op::AscribeUserType>>
  33:     0x7f5a2463e0ee - <rustc_borrowck[321066d147c467a7]::type_check::TypeVerifier as rustc_middle[fb11b19bba64d848]::mir::visit::Visitor>::visit_operand
  34:     0x7f5a24617b64 - <rustc_borrowck[321066d147c467a7]::type_check::TypeVerifier as rustc_middle[fb11b19bba64d848]::mir::visit::Visitor>::visit_body
  35:     0x7f5a245e5045 - rustc_borrowck[321066d147c467a7]::type_check::type_check
  36:     0x7f5a245bccf5 - rustc_borrowck[321066d147c467a7]::nll::compute_regions
  37:     0x7f5a2459a96b - rustc_borrowck[321066d147c467a7]::do_mir_borrowck
  38:     0x7f5a24596989 - rustc_borrowck[321066d147c467a7]::mir_borrowck
  39:     0x7f5a247dbb5e - rustc_query_system[d35528287009336b]::query::plumbing::try_execute_query::<rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt, rustc_query_system[d35528287009336b]::query::caches::VecCache<rustc_span[22b27358efe64712]::def_id::LocalDefId, &rustc_middle[fb11b19bba64d848]::mir::query::BorrowCheckResult>>
  40:     0x7f5a251eedaa - <rustc_query_impl[f9ce7d291822ba8c]::Queries as rustc_middle[fb11b19bba64d848]::ty::query::QueryEngine>::mir_borrowck
  41:     0x7f5a24294186 - rustc_mir_transform[a30e9448cdbece04]::mir_drops_elaborated_and_const_checked
  42:     0x7f5a2418d9ba - rustc_query_system[d35528287009336b]::query::plumbing::try_execute_query::<rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt, rustc_query_system[d35528287009336b]::query::caches::DefaultCache<rustc_middle[fb11b19bba64d848]::ty::WithOptConstParam<rustc_span[22b27358efe64712]::def_id::LocalDefId>, &rustc_data_structures[27389a654890db55]::steal::Steal<rustc_middle[fb11b19bba64d848]::mir::Body>>>
  43:     0x7f5a251ed425 - <rustc_query_impl[f9ce7d291822ba8c]::Queries as rustc_middle[fb11b19bba64d848]::ty::query::QueryEngine>::mir_drops_elaborated_and_const_checked
  44:     0x7f5a242fde44 - rustc_mir_transform[a30e9448cdbece04]::inner_mir_for_ctfe
  45:     0x7f5a242fd554 - rustc_mir_transform[a30e9448cdbece04]::mir_for_ctfe
  46:     0x7f5a240c8c5d - rustc_query_system[d35528287009336b]::query::plumbing::try_execute_query::<rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt, rustc_query_system[d35528287009336b]::query::caches::DefaultCache<rustc_span[22b27358efe64712]::def_id::DefId, &rustc_middle[fb11b19bba64d848]::mir::Body>>
  47:     0x7f5a251ed568 - <rustc_query_impl[f9ce7d291822ba8c]::Queries as rustc_middle[fb11b19bba64d848]::ty::query::QueryEngine>::mir_for_ctfe
  48:     0x7f5a23a481f3 - <rustc_const_eval[d32d9fcb06886bba]::interpret::eval_context::InterpCx<rustc_const_eval[d32d9fcb06886bba]::const_eval::machine::CompileTimeInterpreter>>::load_mir
  49:     0x7f5a23969349 - rustc_const_eval[d32d9fcb06886bba]::const_eval::eval_queries::eval_to_allocation_raw_provider
  50:     0x7f5a24c1376a - rustc_query_system[d35528287009336b]::query::plumbing::try_execute_query::<rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt, rustc_query_system[d35528287009336b]::query::caches::DefaultCache<rustc_middle[fb11b19bba64d848]::ty::ParamEnvAnd<rustc_middle[fb11b19bba64d848]::mir::interpret::GlobalId>, core[454b920cfc772497]::result::Result<rustc_middle[fb11b19bba64d848]::mir::interpret::value::ConstAlloc, rustc_middle[fb11b19bba64d848]::mir::interpret::error::ErrorHandled>>>
  51:     0x7f5a251ef06f - <rustc_query_impl[f9ce7d291822ba8c]::Queries as rustc_middle[fb11b19bba64d848]::ty::query::QueryEngine>::eval_to_allocation_raw
  52:     0x7f5a24edd077 - rustc_const_eval[d32d9fcb06886bba]::const_eval::eval_to_valtree
  53:     0x7f5a24edced0 - <rustc_const_eval[d32d9fcb06886bba]::provide::{closure#0} as core[454b920cfc772497]::ops::function::FnOnce<(rustc_middle[fb11b19bba64d848]::ty::context::TyCtxt, rustc_middle[fb11b19bba64d848]::ty::ParamEnvAnd<rustc_middle[fb11b19bba64d848]::mir::interpret::GlobalId>)>>::call_once
  54:     0x7f5a24e94d50 - rustc_query_system[d35528287009336b]::query::plumbing::try_execute_query::<rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt, rustc_query_system[d35528287009336b]::query::caches::DefaultCache<rustc_middle[fb11b19bba64d848]::ty::ParamEnvAnd<rustc_middle[fb11b19bba64d848]::mir::interpret::GlobalId>, core[454b920cfc772497]::result::Result<core[454b920cfc772497]::option::Option<rustc_middle[fb11b19bba64d848]::ty::consts::valtree::ValTree>, rustc_middle[fb11b19bba64d848]::mir::interpret::error::ErrorHandled>>>
  55:     0x7f5a24e9488a - rustc_query_system[d35528287009336b]::query::plumbing::get_query::<rustc_query_impl[f9ce7d291822ba8c]::queries::eval_to_valtree, rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt>
  56:     0x7f5a24e947a1 - <rustc_query_impl[f9ce7d291822ba8c]::Queries as rustc_middle[fb11b19bba64d848]::ty::query::QueryEngine>::eval_to_valtree
  57:     0x7f5a2427364e - <rustc_middle[fb11b19bba64d848]::ty::context::TyCtxt>::const_eval_global_id_for_typeck
  58:     0x7f5a24272bba - <rustc_middle[fb11b19bba64d848]::ty::context::TyCtxt>::const_eval_resolve_for_typeck
  59:     0x7f5a25b56c07 - <rustc_infer[436d8bad8048b04b]::infer::InferCtxt>::const_eval_resolve
  60:     0x7f5a23b85eff - rustc_trait_selection[1e153bf3b090dfe7]::traits::const_evaluatable::is_const_evaluatable
  61:     0x7f5a23b1c29d - <rustc_trait_selection[1e153bf3b090dfe7]::traits::fulfill::FulfillProcessor as rustc_data_structures[27389a654890db55]::obligation_forest::ObligationProcessor>::process_obligation
  62:     0x7f5a23b1242e - <rustc_data_structures[27389a654890db55]::obligation_forest::ObligationForest<rustc_trait_selection[1e153bf3b090dfe7]::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection[1e153bf3b090dfe7]::traits::fulfill::FulfillProcessor>
  63:     0x7f5a23efc20b - <rustc_trait_selection[1e153bf3b090dfe7]::traits::engine::ObligationCtxt>::select_all_or_error
  64:     0x7f5a2424561f - rustc_hir_analysis[423524a2adbac610]::check::wfcheck::check_type_defn
  65:     0x7f5a24226262 - rustc_hir_analysis[423524a2adbac610]::check::wfcheck::check_well_formed
  66:     0x7f5a23aa4b99 - rustc_query_system[d35528287009336b]::query::plumbing::get_query::<rustc_query_impl[f9ce7d291822ba8c]::queries::check_well_formed, rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt>
  67:     0x7f5a24c66f08 - rustc_data_structures[27389a654890db55]::sync::par_for_each_in::<&[rustc_hir[7de0088f04d77806]::hir::ItemId], <rustc_middle[fb11b19bba64d848]::hir::ModuleItems>::par_items<rustc_hir_analysis[423524a2adbac610]::check::wfcheck::check_mod_type_wf::{closure#0}>::{closure#0}>
  68:     0x7f5a24c66d17 - rustc_hir_analysis[423524a2adbac610]::check::wfcheck::check_mod_type_wf
  69:     0x7f5a243a7d1d - rustc_query_system[d35528287009336b]::query::plumbing::try_execute_query::<rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt, rustc_query_system[d35528287009336b]::query::caches::VecCache<rustc_span[22b27358efe64712]::def_id::LocalDefId, ()>>
  70:     0x7f5a24c3b6a3 - rustc_query_system[d35528287009336b]::query::plumbing::get_query::<rustc_query_impl[f9ce7d291822ba8c]::queries::check_mod_type_wf, rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt>
  71:     0x7f5a23dc8b18 - rustc_data_structures[27389a654890db55]::sync::par_for_each_in::<&[rustc_hir[7de0088f04d77806]::hir_id::OwnerId], <rustc_middle[fb11b19bba64d848]::hir::map::Map>::par_for_each_module<rustc_hir_analysis[423524a2adbac610]::check_crate::{closure#5}::{closure#0}::{closure#0}>::{closure#0}>
  72:     0x7f5a23dc8903 - <rustc_session[1886fb585cbb0752]::session::Session>::track_errors::<rustc_hir_analysis[423524a2adbac610]::check_crate::{closure#5}, ()>
  73:     0x7f5a23dc821d - rustc_hir_analysis[423524a2adbac610]::check_crate
  74:     0x7f5a23dc7ebb - rustc_interface[5feaddc0f04e2ee8]::passes::analysis
  75:     0x7f5a25009727 - rustc_query_system[d35528287009336b]::query::plumbing::try_execute_query::<rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt, rustc_query_system[d35528287009336b]::query::caches::DefaultCache<(), core[454b920cfc772497]::result::Result<(), rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>>>
  76:     0x7f5a25009420 - rustc_query_system[d35528287009336b]::query::plumbing::get_query::<rustc_query_impl[f9ce7d291822ba8c]::queries::analysis, rustc_query_impl[f9ce7d291822ba8c]::plumbing::QueryCtxt>
  77:     0x7f5a24a231f3 - <rustc_interface[5feaddc0f04e2ee8]::passes::QueryContext>::enter::<rustc_driver[a18c018241618262]::run_compiler::{closure#1}::{closure#2}::{closure#2}, core[454b920cfc772497]::result::Result<(), rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>>
  78:     0x7f5a24a1f5a3 - <rustc_interface[5feaddc0f04e2ee8]::interface::Compiler>::enter::<rustc_driver[a18c018241618262]::run_compiler::{closure#1}::{closure#2}, core[454b920cfc772497]::result::Result<core[454b920cfc772497]::option::Option<rustc_interface[5feaddc0f04e2ee8]::queries::Linker>, rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>>
  79:     0x7f5a24a1a608 - rustc_span[22b27358efe64712]::with_source_map::<core[454b920cfc772497]::result::Result<(), rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>, rustc_interface[5feaddc0f04e2ee8]::interface::run_compiler<core[454b920cfc772497]::result::Result<(), rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>, rustc_driver[a18c018241618262]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  80:     0x7f5a24a1a0f5 - <scoped_tls[a9410c74fe979615]::ScopedKey<rustc_span[22b27358efe64712]::SessionGlobals>>::set::<rustc_interface[5feaddc0f04e2ee8]::interface::run_compiler<core[454b920cfc772497]::result::Result<(), rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>, rustc_driver[a18c018241618262]::run_compiler::{closure#1}>::{closure#0}, core[454b920cfc772497]::result::Result<(), rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>>
  81:     0x7f5a24a196e2 - std[e2221f2923982408]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[5feaddc0f04e2ee8]::util::run_in_thread_pool_with_globals<rustc_interface[5feaddc0f04e2ee8]::interface::run_compiler<core[454b920cfc772497]::result::Result<(), rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>, rustc_driver[a18c018241618262]::run_compiler::{closure#1}>::{closure#0}, core[454b920cfc772497]::result::Result<(), rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[454b920cfc772497]::result::Result<(), rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>>
  82:     0x7f5a25100e6e - <<std[e2221f2923982408]::thread::Builder>::spawn_unchecked_<rustc_interface[5feaddc0f04e2ee8]::util::run_in_thread_pool_with_globals<rustc_interface[5feaddc0f04e2ee8]::interface::run_compiler<core[454b920cfc772497]::result::Result<(), rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>, rustc_driver[a18c018241618262]::run_compiler::{closure#1}>::{closure#0}, core[454b920cfc772497]::result::Result<(), rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[454b920cfc772497]::result::Result<(), rustc_errors[55c94f74a3e69376]::ErrorGuaranteed>>::{closure#1} as core[454b920cfc772497]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  83:     0x7f5a26610043 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd5e0dcf36c8eb2ec
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/alloc/src/boxed.rs:2000:9
  84:     0x7f5a26610043 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5249b73c8953b95a
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/alloc/src/boxed.rs:2000:9
  85:     0x7f5a26610043 - std::sys::unix::thread::Thread::new::thread_start::h680046a940e18e85
                               at /rustc/0f529f0f49f4dd404b78e605398531c96f220fc5/library/std/src/sys/unix/thread.rs:108:17
  86:     0x7f5a223068fd - <unknown>
  87:     0x7f5a22388a60 - <unknown>
  88:                0x0 - <unknown>

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 1.68.0-nightly (0f529f0f4 2022-12-13) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [type_op_ascribe_user_type] evaluating `type_op_ascribe_user_type` `AscribeUserType { mir_ty: usize, def_id: DefId(0:7 ~ 9284102350ff28a36b7761c0cfdcb4a5c0b969a8[f58b]::ConstDefaultUnstable::{constant#0}::{constant#0}), user_substs: UserSubsts { substs: [usize], user_self_ty: None } }`
#1 [mir_borrowck] borrow-checking `ConstDefaultUnstable::{constant#0}`
#2 [mir_drops_elaborated_and_const_checked] elaborating drops for `ConstDefaultUnstable::{constant#0}`
#3 [mir_for_ctfe] caching mir of `ConstDefaultUnstable::{constant#0}` for CTFE
#4 [eval_to_allocation_raw] const-evaluating + checking `ConstDefaultUnstable::{constant#0}`
#5 [eval_to_valtree] evaluating type-level constant
#6 [check_well_formed] checking that `ConstDefaultUnstable` is well-formed
#7 [check_mod_type_wf] checking that types are well-formed in top-level module
#8 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error

[jruderman]

Regression in nightly-2022-03-25

Commits in range

  commit[0] 2022-03-23UTC: Auto merge of #95247 - cuviper:llvm14, r=nikic
  commit[1] 2022-03-23UTC: Auto merge of #95250 - matthiaskrgr:rollup-ma4zl69, r=matthiaskrgr
  commit[2] 2022-03-24UTC: Auto merge of #87667 - the8472:document-in-place-iter, r=yaahc
  commit[3] 2022-03-24UTC: Auto merge of #95233 - compiler-errors:chalk-up, r=jackh726
  commit[4] 2022-03-24UTC: Auto merge of #91030 - estebank:trait-bounds-are-tricky-2, r=oli-obk
  commit[5] 2022-03-24UTC: Auto merge of #94876 - b-naber:thir-abstract-const-changes, r=lcnr
  commit[6] 2022-03-24UTC: Auto merge of #94517 - aDotInTheVoid:inline_wrapping_next_power_two, r=yaahc
  commit[7] 2022-03-24UTC: Auto merge of #94934 - Lireer:const-prop-lint, r=oli-obk

Bisection method

I used:

cargo-bisect-rustc --preserve --start 2020-01-01 --script ./shout.sh

With shout.sh:

! rustc --edition=2021 src/main.rs 2>&1 | grep -E "(internal compiler error)|(panicked)"

On x86_64-apple-darwin

[matthiaskrgr]

So this is not the same root cause as #105631 ..?
Fascinating 😄

[JohnTitor]

Triage: Fixed on the latest nightly, @rustbot labels: +E-needs-test