ICE: SizeSkeleton::compute panics on complex recursive type alias involving Pointee::Metadata #151069

thread 'rustc' panicked at /rustc-dev/f57eac1bf98cb5d578e3364b64365ec398c137df/compiler/rustc_middle/src/ty/sty.rs:1762:86:
Box<dyn Any>
stack backtrace:
   0:     0x7f92b7a20c4b - <std[14974c2a6d31bd09]::backtrace::Backtrace>::create
   1:     0x7f92b7a20b95 - <std[14974c2a6d31bd09]::backtrace::Backtrace>::force_capture
   2:     0x7f92b6a165c7 - std[14974c2a6d31bd09]::panicking::update_hook::<alloc[97bcaa3c9f42b50c]::boxed::Box<rustc_driver_impl[8626402415690959]::install_ice_hook::{closure#1}>>::{closure#0}
   3:     0x7f92b7a34062 - std[14974c2a6d31bd09]::panicking::panic_with_hook
   4:     0x7f92b6a53251 - std[14974c2a6d31bd09]::panicking::begin_panic::<rustc_errors[cacf81fbc0306139]::ExplicitBug>::{closure#0}
   5:     0x7f92b6a43506 - std[14974c2a6d31bd09]::sys::backtrace::__rust_end_short_backtrace::<std[14974c2a6d31bd09]::panicking::begin_panic<rustc_errors[cacf81fbc0306139]::ExplicitBug>::{closure#0}, !>
   6:     0x7f92b6a40b49 - std[14974c2a6d31bd09]::panicking::begin_panic::<rustc_errors[cacf81fbc0306139]::ExplicitBug>
   7:     0x7f92b6a70f91 - <rustc_errors[cacf81fbc0306139]::diagnostic::BugAbort as rustc_errors[cacf81fbc0306139]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
   8:     0x7f92b7022289 - rustc_middle[42069f076602ef26]::util::bug::opt_span_bug_fmt::<rustc_span[ea6610cf11a1023c]::span_encoding::Span>::{closure#0}
   9:     0x7f92b7022412 - rustc_middle[42069f076602ef26]::ty::context::tls::with_opt::<rustc_middle[42069f076602ef26]::util::bug::opt_span_bug_fmt<rustc_span[ea6610cf11a1023c]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  10:     0x7f92b701352b - rustc_middle[42069f076602ef26]::ty::context::tls::with_context_opt::<rustc_middle[42069f076602ef26]::ty::context::tls::with_opt<rustc_middle[42069f076602ef26]::util::bug::opt_span_bug_fmt<rustc_span[ea6610cf11a1023c]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  11:     0x7f92b4a60014 - rustc_middle[42069f076602ef26]::util::bug::bug_fmt
  12:     0x7f92b8226f01 - rustc_trait_selection[15cd687e6e3a4627]::traits::project::confirm_candidate
  13:     0x7f92b8201c4b - rustc_trait_selection[15cd687e6e3a4627]::traits::project::normalize_projection_term
  14:     0x7f92b8995500 - rustc_traits[d900ce35b51d4320]::normalize_projection_ty::normalize_canonicalized_projection
  15:     0x7f92b8994f02 - rustc_query_impl[7762d22649c04fd8]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7762d22649c04fd8]::query_impl::normalize_canonicalized_projection::dynamic_query::{closure#2}::{closure#0}, rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 8usize]>>
  16:     0x7f92b8994025 - rustc_query_system[4067c90f9d31d9ad]::query::plumbing::try_execute_query::<rustc_query_impl[7762d22649c04fd8]::DynamicConfig<rustc_query_system[4067c90f9d31d9ad]::query::caches::DefaultCache<rustc_type_ir[2e637ce3bc4e2c58]::canonical::CanonicalQueryInput<rustc_middle[42069f076602ef26]::ty::context::TyCtxt, rustc_middle[42069f076602ef26]::ty::ParamEnvAnd<rustc_type_ir[2e637ce3bc4e2c58]::predicate::AliasTerm<rustc_middle[42069f076602ef26]::ty::context::TyCtxt>>>, rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[7762d22649c04fd8]::plumbing::QueryCtxt, false>
  17:     0x7f92b8993c6a - rustc_query_impl[7762d22649c04fd8]::query_impl::normalize_canonicalized_projection::get_query_non_incr::__rust_end_short_backtrace
  18:     0x7f92b81f0ab3 - <rustc_trait_selection[15cd687e6e3a4627]::traits::query::normalize::QueryNormalizer>::try_fold_free_or_assoc
  19:     0x7f92b81efb7e - <rustc_trait_selection[15cd687e6e3a4627]::traits::query::normalize::QueryNormalizer as rustc_type_ir[2e637ce3bc4e2c58]::fold::FallibleTypeFolder<rustc_middle[42069f076602ef26]::ty::context::TyCtxt>>::try_fold_ty
  20:     0x7f92b81e9cf6 - <rustc_traits[d900ce35b51d4320]::normalize_erasing_regions::provide::{closure#0} as core[75fca27d79ab979d]::ops::function::FnOnce<(rustc_middle[42069f076602ef26]::ty::context::TyCtxt, rustc_middle[42069f076602ef26]::ty::PseudoCanonicalInput<rustc_middle[42069f076602ef26]::ty::generic_args::GenericArg>)>>::call_once
  21:     0x7f92b81e9860 - rustc_query_impl[7762d22649c04fd8]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7762d22649c04fd8]::query_impl::try_normalize_generic_arg_after_erasing_regions::dynamic_query::{closure#2}::{closure#0}, rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 8usize]>>
  22:     0x7f92b81e8a8d - rustc_query_system[4067c90f9d31d9ad]::query::plumbing::try_execute_query::<rustc_query_impl[7762d22649c04fd8]::DynamicConfig<rustc_query_system[4067c90f9d31d9ad]::query::caches::DefaultCache<rustc_middle[42069f076602ef26]::ty::PseudoCanonicalInput<rustc_middle[42069f076602ef26]::ty::generic_args::GenericArg>, rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[7762d22649c04fd8]::plumbing::QueryCtxt, false>
  23:     0x7f92b81e8758 - rustc_query_impl[7762d22649c04fd8]::query_impl::try_normalize_generic_arg_after_erasing_regions::get_query_non_incr::__rust_end_short_backtrace
  24:     0x7f92b81e7f5a - <rustc_middle[42069f076602ef26]::ty::normalize_erasing_regions::TryNormalizeAfterErasingRegionsFolder as rustc_type_ir[2e637ce3bc4e2c58]::fold::FallibleTypeFolder<rustc_middle[42069f076602ef26]::ty::context::TyCtxt>>::try_fold_ty
  25:     0x7f92b883bd61 - rustc_ty_utils[b80a22a8b24a11b7]::layout::layout_of_uncached
  26:     0x7f92b8834dd7 - rustc_ty_utils[b80a22a8b24a11b7]::layout::layout_of
  27:     0x7f92b8834d40 - rustc_query_impl[7762d22649c04fd8]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7762d22649c04fd8]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 16usize]>>
  28:     0x7f92b8833c1d - rustc_query_system[4067c90f9d31d9ad]::query::plumbing::try_execute_query::<rustc_query_impl[7762d22649c04fd8]::DynamicConfig<rustc_query_system[4067c90f9d31d9ad]::query::caches::DefaultCache<rustc_middle[42069f076602ef26]::ty::PseudoCanonicalInput<rustc_middle[42069f076602ef26]::ty::Ty>, rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[7762d22649c04fd8]::plumbing::QueryCtxt, false>
  29:     0x7f92b8833834 - rustc_query_impl[7762d22649c04fd8]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  30:     0x7f92b8834f3e - rustc_ty_utils[b80a22a8b24a11b7]::layout::layout_of
  31:     0x7f92b8834d40 - rustc_query_impl[7762d22649c04fd8]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7762d22649c04fd8]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 16usize]>>
  32:     0x7f92b8833c1d - rustc_query_system[4067c90f9d31d9ad]::query::plumbing::try_execute_query::<rustc_query_impl[7762d22649c04fd8]::DynamicConfig<rustc_query_system[4067c90f9d31d9ad]::query::caches::DefaultCache<rustc_middle[42069f076602ef26]::ty::PseudoCanonicalInput<rustc_middle[42069f076602ef26]::ty::Ty>, rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[7762d22649c04fd8]::plumbing::QueryCtxt, false>
  33:     0x7f92b8833834 - rustc_query_impl[7762d22649c04fd8]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  34:     0x7f92b85ec9cf - rustc_hir_analysis[439a21a4da756827]::check::check::check_item_type
  35:     0x7f92b85e4af6 - rustc_hir_analysis[439a21a4da756827]::check::wfcheck::check_well_formed
  36:     0x7f92b85e4ad7 - rustc_query_impl[7762d22649c04fd8]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7762d22649c04fd8]::query_impl::check_well_formed::dynamic_query::{closure#2}::{closure#0}, rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 1usize]>>
  37:     0x7f92b85e434d - rustc_query_system[4067c90f9d31d9ad]::query::plumbing::try_execute_query::<rustc_query_impl[7762d22649c04fd8]::DynamicConfig<rustc_data_structures[5b2e5bcce01f3ea3]::vec_cache::VecCache<rustc_span[ea6610cf11a1023c]::def_id::LocalDefId, rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 1usize]>, rustc_query_system[4067c90f9d31d9ad]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[7762d22649c04fd8]::plumbing::QueryCtxt, false>
  38:     0x7f92b85e3e56 - rustc_query_impl[7762d22649c04fd8]::query_impl::check_well_formed::get_query_non_incr::__rust_end_short_backtrace
  39:     0x7f92b85e15f0 - rustc_hir_analysis[439a21a4da756827]::check::wfcheck::check_type_wf
  40:     0x7f92b85e14dd - rustc_query_impl[7762d22649c04fd8]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7762d22649c04fd8]::query_impl::check_type_wf::dynamic_query::{closure#2}::{closure#0}, rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 1usize]>>
  41:     0x7f92b915b408 - rustc_query_system[4067c90f9d31d9ad]::query::plumbing::try_execute_query::<rustc_query_impl[7762d22649c04fd8]::DynamicConfig<rustc_query_system[4067c90f9d31d9ad]::query::caches::SingleCache<rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[7762d22649c04fd8]::plumbing::QueryCtxt, false>
  42:     0x7f92b915b1ce - rustc_query_impl[7762d22649c04fd8]::query_impl::check_type_wf::get_query_non_incr::__rust_end_short_backtrace
  43:     0x7f92b8a53096 - rustc_hir_analysis[439a21a4da756827]::check_crate
  44:     0x7f92b8237f5b - rustc_interface[90afb413dadbe4f1]::passes::analysis
  45:     0x7f92b8237ba7 - rustc_query_impl[7762d22649c04fd8]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[7762d22649c04fd8]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 0usize]>>
  46:     0x7f92b915cbe6 - rustc_query_system[4067c90f9d31d9ad]::query::plumbing::try_execute_query::<rustc_query_impl[7762d22649c04fd8]::DynamicConfig<rustc_query_system[4067c90f9d31d9ad]::query::caches::SingleCache<rustc_middle[42069f076602ef26]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[7762d22649c04fd8]::plumbing::QueryCtxt, false>
  47:     0x7f92b915c948 - rustc_query_impl[7762d22649c04fd8]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  48:     0x7f92b9324754 - <rustc_interface[90afb413dadbe4f1]::passes::create_and_enter_global_ctxt<core[75fca27d79ab979d]::option::Option<rustc_interface[90afb413dadbe4f1]::queries::Linker>, rustc_driver_impl[8626402415690959]::run_compiler::{closure#0}::{closure#2}>::{closure#2} as core[75fca27d79ab979d]::ops::function::FnOnce<(&rustc_session[7c34b462142e1273]::session::Session, rustc_middle[42069f076602ef26]::ty::context::CurrentGcx, alloc[97bcaa3c9f42b50c]::sync::Arc<rustc_data_structures[5b2e5bcce01f3ea3]::jobserver::Proxy>, &std[14974c2a6d31bd09]::sync::once_lock::OnceLock<rustc_middle[42069f076602ef26]::ty::context::GlobalCtxt>, &rustc_data_structures[5b2e5bcce01f3ea3]::sync::worker_local::WorkerLocal<rustc_middle[42069f076602ef26]::arena::Arena>, &rustc_data_structures[5b2e5bcce01f3ea3]::sync::worker_local::WorkerLocal<rustc_hir[a6c28dd0effa383c]::Arena>, rustc_driver_impl[8626402415690959]::run_compiler::{closure#0}::{closure#2})>>::call_once::{shim:vtable#0}
  49:     0x7f92b921cf98 - rustc_interface[90afb413dadbe4f1]::interface::run_compiler::<(), rustc_driver_impl[8626402415690959]::run_compiler::{closure#0}>::{closure#1}
  50:     0x7f92b9065f4e - std[14974c2a6d31bd09]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[90afb413dadbe4f1]::util::run_in_thread_with_globals<rustc_interface[90afb413dadbe4f1]::util::run_in_thread_pool_with_globals<rustc_interface[90afb413dadbe4f1]::interface::run_compiler<(), rustc_driver_impl[8626402415690959]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  51:     0x7f92b9065d20 - <std[14974c2a6d31bd09]::thread::lifecycle::spawn_unchecked<rustc_interface[90afb413dadbe4f1]::util::run_in_thread_with_globals<rustc_interface[90afb413dadbe4f1]::util::run_in_thread_pool_with_globals<rustc_interface[90afb413dadbe4f1]::interface::run_compiler<(), rustc_driver_impl[8626402415690959]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[75fca27d79ab979d]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  52:     0x7f92b9068438 - <std[14974c2a6d31bd09]::sys::thread::unix::Thread>::new::thread_start
  53:     0x7f92b2a94ac3 - start_thread
                               at ./nptl/pthread_create.c:442:8
  54:     0x7f92b2b268c0 - __GI___clone3
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:81:0
  55:                0x0 - <unknown>


rustc version: 1.94.0-nightly (f57eac1bf 2026-01-10)
platform: x86_64-unknown-linux-gnu

query stack during panic:
#0 [normalize_canonicalized_projection] normalizing `<Foo as core::ptr::metadata::Pointee>::Metadata`
#1 [try_normalize_generic_arg_after_erasing_regions] normalizing `<Foo as core::ptr::metadata::Pointee>::Metadata`
#2 [layout_of] computing layout of `&Foo`
#3 [layout_of] computing layout of `&'static Foo`
#4 [check_well_formed] checking that `FOO2` is well-formed
#5 [check_type_wf] checking that types are well-formed
#6 [analysis] running analysis passes on crate `after`
end of query stack