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ICE: normalizing free const aliases in the type system is unsupported #140860

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ICE: normalizing free const aliases in the type system is unsupported#140860
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C-bugCategory: This is a bug.F-min_generic_const_args`#![feature(min_generic_const_args)]`I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️S-bug-has-testStatus: This bug is tracked inside the repo by a `known-bug` test.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
@matthiaskrgr

Description

@matthiaskrgr
matthiaskrgr
opened on May 9, 2025

Code

this compiles:

#![feature(unsized_const_params)]
#![feature(with_negative_coherence, negative_impls)]
trait a < const b : &'static str> {} trait c {} struct d< e >(e);
impl<e> c for e where e: a<""> {}
impl<e> c for d<e> {}
impl<e> !a<f> for e {}
const f : &str = "";
fn main() {}

but if we add
#![feature(min_generic_const_args)]
it will ice:

#![feature(min_generic_const_args)]
#![feature(unsized_const_params)]
#![feature(with_negative_coherence, negative_impls)]
trait a < const b : &'static str> {} trait c {} struct d< e >(e);
impl<e> c for e where e: a<""> {}
impl<e> c for d<e> {}
impl<e> !a<f> for e {}
const f : &str = "";
fn main() {}

it ICEs

Meta

rustc --version --verbose:

<version>

Error output

warning: trait `a` should have an upper camel case name
 --> code.rs:4:7
  |
4 | trait a < const b : &'static str> {} trait c {} struct d< e >(e);
  |       ^ help: convert the identifier to upper camel case: `A`
  |
  = note: `#[warn(non_camel_case_types)]` on by default

warning: trait `c` should have an upper camel case name
 --> code.rs:4:44
  |
4 | trait a < const b : &'static str> {} trait c {} struct d< e >(e);
  |                                            ^ help: convert the identifier to upper camel case (notice the capitalization): `C`

warning: type `d` should have an upper camel case name
 --> code.rs:4:56
  |
4 | trait a < const b : &'static str> {} trait c {} struct d< e >(e);
  |                                                        ^ help: convert the identifier to upper camel case: `D`

warning: type parameter `e` should have an upper camel case name
 --> code.rs:4:59
  |
4 | trait a < const b : &'static str> {} trait c {} struct d< e >(e);
  |                                                           ^ help: convert the identifier to upper camel case: `E`

warning: type parameter `e` should have an upper camel case name
 --> code.rs:5:6
  |
5 | impl<e> c for e where e: a<""> {}
  |      ^ help: convert the identifier to upper camel case: `E`

warning: type parameter `e` should have an upper camel case name
 --> code.rs:6:6
  |
6 | impl<e> c for d<e> {}
  |      ^ help: convert the identifier to upper camel case: `E`

warning: type parameter `e` should have an upper camel case name
 --> code.rs:7:6
  |
7 | impl<e> !a<f> for e {}
  |      ^ help: convert the identifier to upper camel case: `E`
Backtrace 

thread 'rustc' panicked at /rustc/50aa04180709189a03dde5fd1c05751b2625ed37/compiler/rustc_next_trait_solver/src/solve/normalizes_to/free_alias.rs:37:13:
normalizing free const aliases in the type system is unsupported
stack backtrace:
   0:     0x7cea90363923 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h35b8f72326f85230
   1:     0x7cea90a05c07 - core::fmt::write::h73f5af0fa08ac030
   2:     0x7cea91ae42d1 - std::io::Write::write_fmt::h0140e0dae4becf43
   3:     0x7cea90363782 - std::sys::backtrace::BacktraceLock::print::h2c50f8265df4edf7
   4:     0x7cea9036737a - std::panicking::default_hook::{{closure}}::h4f831a137f70e67f
   5:     0x7cea90366eff - std::panicking::default_hook::h47af645a18677257
   6:     0x7cea8f395ef3 - std[e444442488e5ea2d]::panicking::update_hook::<alloc[24374ce535a764d]::boxed::Box<rustc_driver_impl[d80da60e87609ad4]::install_ice_hook::{closure#1}>>::{closure#0}
   7:     0x7cea90367bf3 - std::panicking::rust_panic_with_hook::h2b8636e09e17cf97
   8:     0x7cea903678b6 - std::panicking::begin_panic_handler::{{closure}}::h21b513d3b95c0c8c
   9:     0x7cea90363de9 - std::sys::backtrace::__rust_end_short_backtrace::h1fff5f9fcecd2e0e
  10:     0x7cea903675ad - __rustc[f67a3b4e60d8f4c4]::rust_begin_unwind
  11:     0x7cea8cc85ce0 - core::panicking::panic_fmt::h0a5d5e7acfcd4e48
  12:     0x7cea9164c0de - <rustc_type_ir[9ff3c44187fc7187]::search_graph::SearchGraph<rustc_next_trait_solver[18fca2b7321b89b5]::solve::search_graph::SearchGraphDelegate<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate>, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::with_new_goal::<<rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_canonical_goal::{closure#0}::{closure#0}::{closure#0}>::{closure#2}
  13:     0x7cea91646255 - <rustc_type_ir[9ff3c44187fc7187]::search_graph::SearchGraph<rustc_next_trait_solver[18fca2b7321b89b5]::solve::search_graph::SearchGraphDelegate<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate>, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::with_new_goal::<<rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_canonical_goal::{closure#0}::{closure#0}::{closure#0}>
  14:     0x7cea9163ff90 - <rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_goal_raw
  15:     0x7cea9163a8ce - <rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_added_goals_step
  16:     0x7cea9164ab8b - <rustc_type_ir[9ff3c44187fc7187]::search_graph::SearchGraph<rustc_next_trait_solver[18fca2b7321b89b5]::solve::search_graph::SearchGraphDelegate<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate>, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::with_new_goal::<<rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_canonical_goal::{closure#0}::{closure#0}::{closure#0}>::{closure#2}
  17:     0x7cea91646255 - <rustc_type_ir[9ff3c44187fc7187]::search_graph::SearchGraph<rustc_next_trait_solver[18fca2b7321b89b5]::solve::search_graph::SearchGraphDelegate<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate>, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::with_new_goal::<<rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_canonical_goal::{closure#0}::{closure#0}::{closure#0}>
  18:     0x7cea9163ff90 - <rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_goal_raw
  19:     0x7cea9163a424 - <rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_goal
  20:     0x7cea9163a5cf - <rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_added_goals_step
  21:     0x7cea9163b4c3 - <rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_added_goals_and_make_canonical_response::{closure#0}
  22:     0x7cea9165961d - <rustc_type_ir[9ff3c44187fc7187]::predicate::TraitPredicate<rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt> as rustc_next_trait_solver[18fca2b7321b89b5]::solve::assembly::GoalKind<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::consider_impl_candidate
  23:     0x7cea91654dd8 - <rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::assemble_and_evaluate_candidates::<rustc_type_ir[9ff3c44187fc7187]::predicate::TraitPredicate<rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>
  24:     0x7cea9164a6c5 - <rustc_type_ir[9ff3c44187fc7187]::search_graph::SearchGraph<rustc_next_trait_solver[18fca2b7321b89b5]::solve::search_graph::SearchGraphDelegate<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate>, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::with_new_goal::<<rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_canonical_goal::{closure#0}::{closure#0}::{closure#0}>::{closure#2}
  25:     0x7cea91646255 - <rustc_type_ir[9ff3c44187fc7187]::search_graph::SearchGraph<rustc_next_trait_solver[18fca2b7321b89b5]::solve::search_graph::SearchGraphDelegate<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate>, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::with_new_goal::<<rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_canonical_goal::{closure#0}::{closure#0}::{closure#0}>
  26:     0x7cea9163ff90 - <rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_goal_raw
  27:     0x7cea9163a424 - <rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::evaluate_goal
  28:     0x7cea91639eb1 - <rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::EvalCtxt<rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate, rustc_middle[dca19e53efad7b1b]::ty::context::TyCtxt>>::enter_root::<core[ce1fa00964895ff1]::result::Result<(rustc_next_trait_solver[18fca2b7321b89b5]::solve::HasChanged, rustc_type_ir[9ff3c44187fc7187]::solve::Certainty), rustc_type_ir[9ff3c44187fc7187]::solve::NoSolution>, <rustc_trait_selection[d8f4687c93db682]::solve::delegate::SolverDelegate as rustc_next_trait_solver[18fca2b7321b89b5]::solve::eval_ctxt::SolverDelegateEvalExt>::evaluate_root_goal::{closure#0}>
  29:     0x7cea91b66e8d - <rustc_trait_selection[d8f4687c93db682]::solve::fulfill::FulfillmentCtxt<rustc_infer[9d37f22212116d89]::traits::engine::ScrubbedTraitError> as rustc_infer[9d37f22212116d89]::traits::engine::TraitEngine<rustc_infer[9d37f22212116d89]::traits::engine::ScrubbedTraitError>>::select_where_possible
  30:     0x7cea91b66b1f - <rustc_trait_selection[d8f4687c93db682]::solve::fulfill::FulfillmentCtxt<rustc_infer[9d37f22212116d89]::traits::engine::ScrubbedTraitError> as rustc_infer[9d37f22212116d89]::traits::engine::TraitEngine<rustc_infer[9d37f22212116d89]::traits::engine::ScrubbedTraitError>>::select_all_or_error
  31:     0x7cea901f402c - rustc_trait_selection[d8f4687c93db682]::traits::coherence::impl_intersection_has_negative_obligation
  32:     0x7cea91644c10 - rustc_trait_selection[d8f4687c93db682]::traits::coherence::overlap
  33:     0x7cea8d9940d4 - <rustc_middle[dca19e53efad7b1b]::traits::specialization_graph::Children as rustc_trait_selection[d8f4687c93db682]::traits::specialize::specialization_graph::ChildrenExt>::insert
  34:     0x7cea90bc5ba3 - <rustc_middle[dca19e53efad7b1b]::traits::specialization_graph::Graph as rustc_trait_selection[d8f4687c93db682]::traits::specialize::specialization_graph::GraphExt>::insert
  35:     0x7cea90bc74f3 - rustc_trait_selection[d8f4687c93db682]::traits::specialize::specialization_graph_provider
  36:     0x7cea90bc6f0b - rustc_query_impl[d196c070bbe03594]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d196c070bbe03594]::query_impl::specialization_graph_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[dca19e53efad7b1b]::query::erase::Erased<[u8; 8usize]>>
  37:     0x7cea90e3a77f - rustc_query_system[ff49814a586d4008]::query::plumbing::try_execute_query::<rustc_query_impl[d196c070bbe03594]::DynamicConfig<rustc_query_system[ff49814a586d4008]::query::caches::DefIdCache<rustc_middle[dca19e53efad7b1b]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[d196c070bbe03594]::plumbing::QueryCtxt, false>
  38:     0x7cea90ee3bf2 - rustc_query_impl[d196c070bbe03594]::query_impl::specialization_graph_of::get_query_non_incr::__rust_end_short_backtrace
  39:     0x7cea9123d9c1 - rustc_hir_analysis[e577ebb869d6e7c7]::coherence::coherent_trait
  40:     0x7cea9123d67d - rustc_query_impl[d196c070bbe03594]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d196c070bbe03594]::query_impl::coherent_trait::dynamic_query::{closure#2}::{closure#0}, rustc_middle[dca19e53efad7b1b]::query::erase::Erased<[u8; 1usize]>>
  41:     0x7cea90f28552 - rustc_query_system[ff49814a586d4008]::query::plumbing::try_execute_query::<rustc_query_impl[d196c070bbe03594]::DynamicConfig<rustc_query_system[ff49814a586d4008]::query::caches::DefIdCache<rustc_middle[dca19e53efad7b1b]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[d196c070bbe03594]::plumbing::QueryCtxt, false>
  42:     0x7cea90f2719b - rustc_query_impl[d196c070bbe03594]::query_impl::coherent_trait::get_query_non_incr::__rust_end_short_backtrace
  43:     0x7cea9122bd10 - rustc_hir_analysis[e577ebb869d6e7c7]::check::wfcheck::check_well_formed
  44:     0x7cea91229e4b - rustc_query_impl[d196c070bbe03594]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d196c070bbe03594]::query_impl::check_well_formed::dynamic_query::{closure#2}::{closure#0}, rustc_middle[dca19e53efad7b1b]::query::erase::Erased<[u8; 1usize]>>
  45:     0x7cea912296f1 - rustc_query_system[ff49814a586d4008]::query::plumbing::try_execute_query::<rustc_query_impl[d196c070bbe03594]::DynamicConfig<rustc_data_structures[c2151ea158282339]::vec_cache::VecCache<rustc_span[e6282e50b7a97c05]::def_id::LocalDefId, rustc_middle[dca19e53efad7b1b]::query::erase::Erased<[u8; 1usize]>, rustc_query_system[ff49814a586d4008]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[d196c070bbe03594]::plumbing::QueryCtxt, false>
  46:     0x7cea912291e6 - rustc_query_impl[d196c070bbe03594]::query_impl::check_well_formed::get_query_non_incr::__rust_end_short_backtrace
  47:     0x7cea9122677d - rustc_hir_analysis[e577ebb869d6e7c7]::check::wfcheck::check_mod_type_wf
  48:     0x7cea91226595 - rustc_query_impl[d196c070bbe03594]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d196c070bbe03594]::query_impl::check_mod_type_wf::dynamic_query::{closure#2}::{closure#0}, rustc_middle[dca19e53efad7b1b]::query::erase::Erased<[u8; 1usize]>>
  49:     0x7cea919e7ac4 - rustc_query_system[ff49814a586d4008]::query::plumbing::try_execute_query::<rustc_query_impl[d196c070bbe03594]::DynamicConfig<rustc_query_system[ff49814a586d4008]::query::caches::DefaultCache<rustc_span[e6282e50b7a97c05]::def_id::LocalModDefId, rustc_middle[dca19e53efad7b1b]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[d196c070bbe03594]::plumbing::QueryCtxt, false>
  50:     0x7cea919e7851 - rustc_query_impl[d196c070bbe03594]::query_impl::check_mod_type_wf::get_query_non_incr::__rust_end_short_backtrace
  51:     0x7cea90da5ef2 - rustc_hir_analysis[e577ebb869d6e7c7]::check_crate
  52:     0x7cea90d99237 - rustc_interface[4b2c44076e9c0aea]::passes::run_required_analyses
  53:     0x7cea919e8ade - rustc_interface[4b2c44076e9c0aea]::passes::analysis
  54:     0x7cea919e8ab5 - rustc_query_impl[d196c070bbe03594]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d196c070bbe03594]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[dca19e53efad7b1b]::query::erase::Erased<[u8; 0usize]>>
  55:     0x7cea9193ccfa - rustc_query_system[ff49814a586d4008]::query::plumbing::try_execute_query::<rustc_query_impl[d196c070bbe03594]::DynamicConfig<rustc_query_system[ff49814a586d4008]::query::caches::SingleCache<rustc_middle[dca19e53efad7b1b]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[d196c070bbe03594]::plumbing::QueryCtxt, false>
  56:     0x7cea9193c9cf - rustc_query_impl[d196c070bbe03594]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  57:     0x7cea91c34b87 - rustc_interface[4b2c44076e9c0aea]::passes::create_and_enter_global_ctxt::<core[ce1fa00964895ff1]::option::Option<rustc_interface[4b2c44076e9c0aea]::queries::Linker>, rustc_driver_impl[d80da60e87609ad4]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
  58:     0x7cea91b0b5a6 - rustc_interface[4b2c44076e9c0aea]::interface::run_compiler::<(), rustc_driver_impl[d80da60e87609ad4]::run_compiler::{closure#0}>::{closure#1}
  59:     0x7cea91adad7e - std[e444442488e5ea2d]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[4b2c44076e9c0aea]::util::run_in_thread_with_globals<rustc_interface[4b2c44076e9c0aea]::util::run_in_thread_pool_with_globals<rustc_interface[4b2c44076e9c0aea]::interface::run_compiler<(), rustc_driver_impl[d80da60e87609ad4]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  60:     0x7cea91adb1f4 - <<std[e444442488e5ea2d]::thread::Builder>::spawn_unchecked_<rustc_interface[4b2c44076e9c0aea]::util::run_in_thread_with_globals<rustc_interface[4b2c44076e9c0aea]::util::run_in_thread_pool_with_globals<rustc_interface[4b2c44076e9c0aea]::interface::run_compiler<(), rustc_driver_impl[d80da60e87609ad4]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[ce1fa00964895ff1]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  61:     0x7cea91adc5eb - std::sys::pal::unix::thread::Thread::new::thread_start::h8985427f793e6fe1
  62:     0x7cea8b8a370a - <unknown>
  63:     0x7cea8b927aac - <unknown>
  64:                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: please make sure that you have updated to the latest nightly

note: please attach the file at `/home/matthias/vcs/github/CRED/rustc-ice-2025-05-09T16_14_43-991372.txt` to your bug report

query stack during panic:
#0 [specialization_graph_of] building specialization graph of trait `c`
#1 [coherent_trait] coherence checking all impls of trait `c`
#2 [check_well_formed] checking that `<impl at code.rs:5:1: 5:31>` is well-formed
#3 [check_mod_type_wf] checking that types are well-formed in top-level module
#4 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 2 previous errors; 9 warnings emitted

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    C-bugCategory: This is a bug.F-min_generic_const_args`#![feature(min_generic_const_args)]`I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️S-bug-has-testStatus: This bug is tracked inside the repo by a `known-bug` test.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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