ice: `const parameter `'_/#0` ('_/#0/0) out of range when instantiating args=[]`

[matthiaskrgr]

#![feature(effects)]

trait Dim {
    fn dim() -> usize;
}

enum Dim3 {}

impl Dim for Dim3 {
    fn dim(mut x: impl Iterator<Item = &'_ ()>) -> usize {
        3
    }
}

fn main() {
    let array: [usize; Dim3::dim()]
    //~^ ERROR E0015
        = [0; Dim3::dim()];
        //~^ ERROR E0015
}

rustc 1.78.0-nightly (af88f7db5 2024-02-08)
binary: rustc
commit-hash: af88f7db51f6f2a1472f9279d7c7e7c822afff77
commit-date: 2024-02-08
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 17.0.6

full stderr (including backtrace)

error[E0658]: anonymous lifetimes in `impl Trait` are unstable
  --> 9EC4A4B5373EE906E7D181DFC690A2B9872BD85A831838181574E1766E898D8D.rs:10:41
   |
10 |     fn dim(mut x: impl Iterator<Item = &'_ ()>) -> usize {
   |                                         ^^ expected named lifetime parameter
   |
   = help: add `#![feature(anonymous_lifetime_in_impl_trait)]` to the crate attributes to enable
   = note: this compiler was built on 2024-02-08; consider upgrading it if it is out of date
help: consider introducing a named lifetime parameter
   |
10 |     fn dim<'a>(mut x: impl Iterator<Item = &'a ()>) -> usize {
   |           ++++                              ~~

error[E0049]: method `dim` has 1 type parameter but its trait declaration has 0 type parameters
  --> 9EC4A4B5373EE906E7D181DFC690A2B9872BD85A831838181574E1766E898D8D.rs:10:19
   |
4  |     fn dim() -> usize;
   |           - expected 0 type parameters
...
10 |     fn dim(mut x: impl Iterator<Item = &'_ ()>) -> usize {
   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |                   |
   |                   found 1 type parameter
   |                   `impl Trait` introduces an implicit type parameter

error: internal compiler error: compiler/rustc_middle/src/ty/generic_args.rs:836:13: Region parameter out of range when substituting in region '_ (index=0, args = [])

thread 'rustc' panicked at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/compiler/rustc_errors/src/lib.rs:922:30:
Box<dyn Any>
stack backtrace:
   0:     0x7f9a8d78bdd6 - std::backtrace_rs::backtrace::libunwind::trace::hf92ca961e56825b0
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
   1:     0x7f9a8d78bdd6 - std::backtrace_rs::backtrace::trace_unsynchronized::h23f341cc1a6c507f
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f9a8d78bdd6 - std::sys_common::backtrace::_print_fmt::ha5a5ba44893edc7f
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7f9a8d78bdd6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h667e6ba5a1d3724e
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f9a8d7de830 - core::fmt::rt::Argument::fmt::h06c91f49bef095fb
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/core/src/fmt/rt.rs:142:9
   5:     0x7f9a8d7de830 - core::fmt::write::h8e4b31b0aa81d13f
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/core/src/fmt/mod.rs:1120:17
   6:     0x7f9a8d77f64f - std::io::Write::write_fmt::h4c479f5c53dfe78c
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/io/mod.rs:1854:15
   7:     0x7f9a8d78bbb4 - std::sys_common::backtrace::_print::he414f5864df55ed1
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f9a8d78bbb4 - std::sys_common::backtrace::print::h939e58bdcc61d57d
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f9a8d78e947 - std::panicking::default_hook::{{closure}}::h244e48e05cd664b2
  10:     0x7f9a8d78e6a9 - std::panicking::default_hook::hf842080c39497dac
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/panicking.rs:292:9
  11:     0x7f9a905454ac - std[f801e042bca9681]::panicking::update_hook::<alloc[1377227f5558ef79]::boxed::Box<rustc_driver_impl[65af58b05c4f91ef]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7f9a8d78f096 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hee9c09a26ce84f59
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/alloc/src/boxed.rs:2029:9
  13:     0x7f9a8d78f096 - std::panicking::rust_panic_with_hook::h83c20f9191a2a712
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/panicking.rs:785:13
  14:     0x7f9a90576f04 - std[f801e042bca9681]::panicking::begin_panic::<rustc_errors[89ec94d63507ad05]::ExplicitBug>::{closure#0}
  15:     0x7f9a905735f6 - std[f801e042bca9681]::sys_common::backtrace::__rust_end_short_backtrace::<std[f801e042bca9681]::panicking::begin_panic<rustc_errors[89ec94d63507ad05]::ExplicitBug>::{closure#0}, !>
  16:     0x7f9a9056ea66 - std[f801e042bca9681]::panicking::begin_panic::<rustc_errors[89ec94d63507ad05]::ExplicitBug>
  17:     0x7f9a90582b61 - <rustc_errors[89ec94d63507ad05]::diagnostic_builder::BugAbort as rustc_errors[89ec94d63507ad05]::diagnostic_builder::EmissionGuarantee>::emit_producing_guarantee
  18:     0x7f9a909369be - <rustc_errors[89ec94d63507ad05]::DiagCtxt>::bug::<alloc[1377227f5558ef79]::string::String>
  19:     0x7f9a909d23db - rustc_middle[2cc1c6e52ad3d43f]::util::bug::opt_span_bug_fmt::<rustc_span[467c297c964200f6]::span_encoding::Span>::{closure#0}
  20:     0x7f9a909b990a - rustc_middle[2cc1c6e52ad3d43f]::ty::context::tls::with_opt::<rustc_middle[2cc1c6e52ad3d43f]::util::bug::opt_span_bug_fmt<rustc_span[467c297c964200f6]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7f9a909b9788 - rustc_middle[2cc1c6e52ad3d43f]::ty::context::tls::with_context_opt::<rustc_middle[2cc1c6e52ad3d43f]::ty::context::tls::with_opt<rustc_middle[2cc1c6e52ad3d43f]::util::bug::opt_span_bug_fmt<rustc_span[467c297c964200f6]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7f9a8e967db0 - rustc_middle[2cc1c6e52ad3d43f]::util::bug::bug_fmt
  23:     0x7f9a909c75c1 - <rustc_middle[2cc1c6e52ad3d43f]::ty::generic_args::ArgFolder as rustc_type_ir[7a3f94f8b621150f]::fold::TypeFolder<rustc_middle[2cc1c6e52ad3d43f]::ty::context::TyCtxt>>::fold_region::region_param_out_of_range
  24:     0x7f9a91807ad6 - <rustc_middle[2cc1c6e52ad3d43f]::ty::generic_args::ArgFolder as rustc_type_ir[7a3f94f8b621150f]::fold::TypeFolder<rustc_middle[2cc1c6e52ad3d43f]::ty::context::TyCtxt>>::fold_ty
  25:     0x7f9a91f65207 - rustc_ty_utils[505851b049994eea]::abi::fn_abi_of_instance
  26:     0x7f9a91f65007 - rustc_query_impl[5ca841c3c79670ea]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5ca841c3c79670ea]::query_impl::fn_abi_of_instance::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 16usize]>>
  27:     0x7f9a91f63d3b - rustc_query_system[125a8aa150dcabe3]::query::plumbing::try_execute_query::<rustc_query_impl[5ca841c3c79670ea]::DynamicConfig<rustc_query_system[125a8aa150dcabe3]::query::caches::DefaultCache<rustc_middle[2cc1c6e52ad3d43f]::ty::ParamEnvAnd<(rustc_middle[2cc1c6e52ad3d43f]::ty::instance::Instance, &rustc_middle[2cc1c6e52ad3d43f]::ty::list::List<rustc_middle[2cc1c6e52ad3d43f]::ty::Ty>)>, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[5ca841c3c79670ea]::plumbing::QueryCtxt, false>
  28:     0x7f9a91f6396d - rustc_query_impl[5ca841c3c79670ea]::query_impl::fn_abi_of_instance::get_query_non_incr::__rust_end_short_backtrace
  29:     0x7f9a926f3daa - rustc_const_eval[8b96f7da1ced5aa1]::const_eval::eval_queries::eval_body_using_ecx::{closure#0}
  30:     0x7f9a926b8470 - rustc_const_eval[8b96f7da1ced5aa1]::const_eval::eval_queries::eval_in_interpreter
  31:     0x7f9a91d8ba68 - rustc_const_eval[8b96f7da1ced5aa1]::const_eval::eval_queries::eval_to_allocation_raw_provider
  32:     0x7f9a91d8b8c4 - rustc_query_impl[5ca841c3c79670ea]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5ca841c3c79670ea]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 24usize]>>
  33:     0x7f9a91fdea34 - rustc_query_system[125a8aa150dcabe3]::query::plumbing::try_execute_query::<rustc_query_impl[5ca841c3c79670ea]::DynamicConfig<rustc_query_system[125a8aa150dcabe3]::query::caches::DefaultCache<rustc_middle[2cc1c6e52ad3d43f]::ty::ParamEnvAnd<rustc_middle[2cc1c6e52ad3d43f]::mir::interpret::GlobalId>, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[5ca841c3c79670ea]::plumbing::QueryCtxt, false>
  34:     0x7f9a91fde5f0 - rustc_query_impl[5ca841c3c79670ea]::query_impl::eval_to_allocation_raw::get_query_non_incr::__rust_end_short_backtrace
  35:     0x7f9a9254e48b - rustc_const_eval[8b96f7da1ced5aa1]::const_eval::eval_to_valtree
  36:     0x7f9a9254e2a2 - <rustc_const_eval[8b96f7da1ced5aa1]::provide::{closure#0} as core[30be359c16b30868]::ops::function::FnOnce<(rustc_middle[2cc1c6e52ad3d43f]::ty::context::TyCtxt, rustc_middle[2cc1c6e52ad3d43f]::ty::ParamEnvAnd<rustc_middle[2cc1c6e52ad3d43f]::mir::interpret::GlobalId>)>>::call_once
  37:     0x7f9a9254e276 - rustc_query_impl[5ca841c3c79670ea]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5ca841c3c79670ea]::query_impl::eval_to_valtree::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 24usize]>>
  38:     0x7f9a9254e22f - <rustc_query_impl[5ca841c3c79670ea]::query_impl::eval_to_valtree::dynamic_query::{closure#2} as core[30be359c16b30868]::ops::function::FnOnce<(rustc_middle[2cc1c6e52ad3d43f]::ty::context::TyCtxt, rustc_middle[2cc1c6e52ad3d43f]::ty::ParamEnvAnd<rustc_middle[2cc1c6e52ad3d43f]::mir::interpret::GlobalId>)>>::call_once
  39:     0x7f9a91fdeb29 - rustc_query_system[125a8aa150dcabe3]::query::plumbing::try_execute_query::<rustc_query_impl[5ca841c3c79670ea]::DynamicConfig<rustc_query_system[125a8aa150dcabe3]::query::caches::DefaultCache<rustc_middle[2cc1c6e52ad3d43f]::ty::ParamEnvAnd<rustc_middle[2cc1c6e52ad3d43f]::mir::interpret::GlobalId>, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[5ca841c3c79670ea]::plumbing::QueryCtxt, false>
  40:     0x7f9a91fde3f0 - rustc_query_impl[5ca841c3c79670ea]::query_impl::eval_to_valtree::get_query_non_incr::__rust_end_short_backtrace
  41:     0x7f9a922c1868 - rustc_middle[2cc1c6e52ad3d43f]::query::plumbing::query_get_at::<rustc_query_system[125a8aa150dcabe3]::query::caches::DefaultCache<rustc_middle[2cc1c6e52ad3d43f]::ty::ParamEnvAnd<rustc_middle[2cc1c6e52ad3d43f]::mir::interpret::GlobalId>, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 24usize]>>>
  42:     0x7f9a922c24eb - <rustc_middle[2cc1c6e52ad3d43f]::ty::context::TyCtxt>::const_eval_resolve_for_typeck
  43:     0x7f9a922c2225 - <rustc_middle[2cc1c6e52ad3d43f]::ty::consts::Const>::eval
  44:     0x7f9a918e6616 - <rustc_trait_selection[d4e26a25c789c9ca]::traits::project::AssocTypeNormalizer as rustc_type_ir[7a3f94f8b621150f]::fold::TypeFolder<rustc_middle[2cc1c6e52ad3d43f]::ty::context::TyCtxt>>::fold_const
  45:     0x7f9a91aa115a - <rustc_middle[2cc1c6e52ad3d43f]::ty::Ty as rustc_type_ir[7a3f94f8b621150f]::fold::TypeSuperFoldable<rustc_middle[2cc1c6e52ad3d43f]::ty::context::TyCtxt>>::try_super_fold_with::<rustc_trait_selection[d4e26a25c789c9ca]::traits::project::AssocTypeNormalizer>
  46:     0x7f9a91852aa1 - <rustc_hir_typeck[286e94da59dc5e55]::fn_ctxt::FnCtxt>::normalize::<rustc_middle[2cc1c6e52ad3d43f]::ty::Ty>
  47:     0x7f9a9194d60c - <dyn rustc_hir_analysis[a6bf7c58d2954086]::astconv::AstConv>::ast_ty_to_ty_inner
  48:     0x7f9a8e75c341 - <rustc_hir_typeck[286e94da59dc5e55]::gather_locals::GatherLocalsVisitor as rustc_hir[7415d709695c548f]::intravisit::Visitor>::visit_expr
  49:     0x7f9a922d0eaa - rustc_hir_typeck[286e94da59dc5e55]::check::check_fn
  50:     0x7f9a919e5585 - rustc_hir_typeck[286e94da59dc5e55]::typeck
  51:     0x7f9a919e48e5 - rustc_query_impl[5ca841c3c79670ea]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5ca841c3c79670ea]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 8usize]>>
  52:     0x7f9a919e38fa - rustc_query_system[125a8aa150dcabe3]::query::plumbing::try_execute_query::<rustc_query_impl[5ca841c3c79670ea]::DynamicConfig<rustc_query_system[125a8aa150dcabe3]::query::caches::VecCache<rustc_span[467c297c964200f6]::def_id::LocalDefId, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[5ca841c3c79670ea]::plumbing::QueryCtxt, false>
  53:     0x7f9a919e3410 - rustc_query_impl[5ca841c3c79670ea]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
  54:     0x7f9a919e2c96 - <rustc_middle[2cc1c6e52ad3d43f]::hir::map::Map>::par_body_owners::<rustc_hir_analysis[a6bf7c58d2954086]::check_crate::{closure#5}>::{closure#0}
  55:     0x7f9a919e17c4 - rustc_hir_analysis[a6bf7c58d2954086]::check_crate
  56:     0x7f9a921d3f92 - rustc_interface[c2746bee48761670]::passes::analysis
  57:     0x7f9a921d3bdf - rustc_query_impl[5ca841c3c79670ea]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5ca841c3c79670ea]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 1usize]>>
  58:     0x7f9a924a17b2 - rustc_query_system[125a8aa150dcabe3]::query::plumbing::try_execute_query::<rustc_query_impl[5ca841c3c79670ea]::DynamicConfig<rustc_query_system[125a8aa150dcabe3]::query::caches::SingleCache<rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[5ca841c3c79670ea]::plumbing::QueryCtxt, false>
  59:     0x7f9a924a1515 - rustc_query_impl[5ca841c3c79670ea]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  60:     0x7f9a924e2436 - rustc_interface[c2746bee48761670]::interface::run_compiler::<core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>, rustc_driver_impl[65af58b05c4f91ef]::run_compiler::{closure#0}>::{closure#0}
  61:     0x7f9a92160248 - std[f801e042bca9681]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[c2746bee48761670]::util::run_in_thread_with_globals<rustc_interface[c2746bee48761670]::util::run_in_thread_pool_with_globals<rustc_interface[c2746bee48761670]::interface::run_compiler<core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>, rustc_driver_impl[65af58b05c4f91ef]::run_compiler::{closure#0}>::{closure#0}, core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>>::{closure#0}, core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>>
  62:     0x7f9a92160077 - <<std[f801e042bca9681]::thread::Builder>::spawn_unchecked_<rustc_interface[c2746bee48761670]::util::run_in_thread_with_globals<rustc_interface[c2746bee48761670]::util::run_in_thread_pool_with_globals<rustc_interface[c2746bee48761670]::interface::run_compiler<core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>, rustc_driver_impl[65af58b05c4f91ef]::run_compiler::{closure#0}>::{closure#0}, core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>>::{closure#0}, core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>>::{closure#1} as core[30be359c16b30868]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  63:     0x7f9a8d798735 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h99757397e7c4fa77
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/alloc/src/boxed.rs:2015:9
  64:     0x7f9a8d798735 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7e0e3d311e6447da
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/alloc/src/boxed.rs:2015:9
  65:     0x7f9a8d798735 - std::sys::pal::unix::thread::Thread::new::thread_start::h0eb0f22e3002fa19
                               at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/sys/pal/unix/thread.rs:108:17
  66:     0x7f9a8d57e9eb - <unknown>
  67:     0x7f9a8d6027cc - <unknown>
  68:                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: please attach the file at `/tmp/im/rustc-ice-2024-02-08T16_59_00-1557155.txt` to your bug report

query stack during panic:
#0 [fn_abi_of_instance] computing call ABI of `<impl at 9EC4A4B5373EE906E7D181DFC690A2B9872BD85A831838181574E1766E898D8D.rs:9:1: 9:18>::dim`
#1 [eval_to_allocation_raw] const-evaluating + checking `main::{constant#0}`
#2 [eval_to_valtree] evaluating type-level constant
#3 [typeck] type-checking `main`
#4 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 3 previous errors

Some errors have detailed explanations: E0049, E0658.
For more information about an error, try `rustc --explain E0049`.

[oli-obk]

Minimized:

// can't use build-fail, because this also fails check-fail, but
// the ICE from #120787 only reproduces on build-fail.
// compile-flags: --emit=mir

#![feature(effects)]

trait Dim {
    fn dim() -> usize;
}

enum Dim3 {}

impl Dim for Dim3 {
    fn dim(x: impl Sized) -> usize {
        3
    }
}

fn main() {
    [0; Dim3::dim()];
}

[matthiaskrgr]

update:

error[E0049]: method `dim` has 1 type parameter but its trait declaration has 0 type parameters
  --> lol.rs:10:19
   |
4  |     fn dim() -> usize;
   |           - expected 0 type parameters
...
10 |     fn dim(mut x: impl Iterator<Item = &'_ ()>) -> usize {
   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |                   |
   |                   found 1 type parameter
   |                   `impl Trait` introduces an implicit type parameter

error[E0658]: anonymous lifetimes in `impl Trait` are unstable
  --> lol.rs:10:41
   |
10 |     fn dim(mut x: impl Iterator<Item = &'_ ()>) -> usize {
   |                                         ^^ expected named lifetime parameter
   |
   = help: add `#![feature(anonymous_lifetime_in_impl_trait)]` to the crate attributes to enable
   = note: this compiler was built on 2024-06-01; consider upgrading it if it is out of date
help: consider introducing a named lifetime parameter
   |
10 |     fn dim<'a>(mut x: impl Iterator<Item = &'a ()>) -> usize {
   |           ++++                              ~~

thread 'rustc' panicked at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/compiler/rustc_type_ir/src/binder.rs:793:9:
const parameter `'_/#0` ('_/#0/0) out of range when instantiating args=[]
stack backtrace:
   0:     0x755fe108acc5 - std::backtrace_rs::backtrace::libunwind::trace::ha04a88842d9880e4
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
   1:     0x755fe108acc5 - std::backtrace_rs::backtrace::trace_unsynchronized::h3df86c3465abd5e1
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x755fe108acc5 - std::sys_common::backtrace::_print_fmt::h8c2e29f86235af4c
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x755fe108acc5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h507a097b66676404
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x755fe10db46b - core::fmt::rt::Argument::fmt::ha80e838d07549293
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/core/src/fmt/rt.rs:165:63
   5:     0x755fe10db46b - core::fmt::write::h29bd0f6435b5b5cb
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/core/src/fmt/mod.rs:1168:21
   6:     0x755fe107fa4f - std::io::Write::write_fmt::hd5651667cec2b52c
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/io/mod.rs:1835:15
   7:     0x755fe108aa9e - std::sys_common::backtrace::_print::h3176666daf50c582
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x755fe108aa9e - std::sys_common::backtrace::print::ha19f92c0a79a518d
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x755fe108d4d9 - std::panicking::default_hook::{{closure}}::hbd2fa3f92596c173
  10:     0x755fe108d27a - std::panicking::default_hook::h7a545bdac7eec416
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/panicking.rs:298:9
  11:     0x755fdd7422b0 - std[45eea3d871d24ad6]::panicking::update_hook::<alloc[fc515f74a8f785dc]::boxed::Box<rustc_driver_impl[c42a3492d6f6b9ec]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x755fe108dc0b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::haa82c5bf225b1a16
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/alloc/src/boxed.rs:2077:9
  13:     0x755fe108dc0b - std::panicking::rust_panic_with_hook::hcc81e648ee4fa5ca
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/panicking.rs:799:13
  14:     0x755fe108d984 - std::panicking::begin_panic_handler::{{closure}}::hb1ba03674522357e
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/panicking.rs:664:13
  15:     0x755fe108b189 - std::sys_common::backtrace::__rust_end_short_backtrace::hd358911377029d52
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x755fe108d6b7 - rust_begin_unwind
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/panicking.rs:652:5
  17:     0x755fe10d7a03 - core::panicking::panic_fmt::h91b4e9abcff8b652
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/core/src/panicking.rs:72:14
  18:     0x755fddbf29b9 - <rustc_type_ir[ec233038e902676a]::binder::ArgFolder<rustc_middle[20ab712fb3484bec]::ty::context::TyCtxt>>::region_param_out_of_range
  19:     0x755fdec2bcb9 - <rustc_type_ir[ec233038e902676a]::binder::ArgFolder<rustc_middle[20ab712fb3484bec]::ty::context::TyCtxt> as rustc_type_ir[ec233038e902676a]::fold::TypeFolder<rustc_middle[20ab712fb3484bec]::ty::context::TyCtxt>>::fold_ty
  20:     0x755fdf2a053d - rustc_ty_utils[aa861e06d005dd49]::abi::fn_abi_of_instance
  21:     0x755fdf2a0273 - rustc_query_impl[2e1c19f32770c017]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2e1c19f32770c017]::query_impl::fn_abi_of_instance::dynamic_query::{closure#2}::{closure#0}, rustc_middle[20ab712fb3484bec]::query::erase::Erased<[u8; 16usize]>>
  22:     0x755fdf29e215 - rustc_query_system[d7adc1b68469f11c]::query::plumbing::try_execute_query::<rustc_query_impl[2e1c19f32770c017]::DynamicConfig<rustc_query_system[d7adc1b68469f11c]::query::caches::DefaultCache<rustc_middle[20ab712fb3484bec]::ty::ParamEnvAnd<(rustc_middle[20ab712fb3484bec]::ty::instance::Instance, &rustc_middle[20ab712fb3484bec]::ty::list::RawList<(), rustc_middle[20ab712fb3484bec]::ty::Ty>)>, rustc_middle[20ab712fb3484bec]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[2e1c19f32770c017]::plumbing::QueryCtxt, false>
  23:     0x755fdf29de6f - rustc_query_impl[2e1c19f32770c017]::query_impl::fn_abi_of_instance::get_query_non_incr::__rust_end_short_backtrace
  24:     0x755fdf1e9620 - <rustc_const_eval[5995760da6ccdb98]::interpret::eval_context::InterpCx<rustc_const_eval[5995760da6ccdb98]::const_eval::machine::CompileTimeInterpreter>>::terminator
  25:     0x755fdcb46df1 - rustc_const_eval[5995760da6ccdb98]::const_eval::eval_queries::eval_to_allocation_raw_provider
  26:     0x755fdf1a0df6 - rustc_query_impl[2e1c19f32770c017]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2e1c19f32770c017]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[20ab712fb3484bec]::query::erase::Erased<[u8; 24usize]>>
  27:     0x755fdf1a0619 - rustc_query_system[d7adc1b68469f11c]::query::plumbing::try_execute_query::<rustc_query_impl[2e1c19f32770c017]::DynamicConfig<rustc_query_system[d7adc1b68469f11c]::query::caches::DefaultCache<rustc_middle[20ab712fb3484bec]::ty::ParamEnvAnd<rustc_middle[20ab712fb3484bec]::mir::interpret::GlobalId>, rustc_middle[20ab712fb3484bec]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[2e1c19f32770c017]::plumbing::QueryCtxt, false>
  28:     0x755fdf1a01f0 - rustc_query_impl[2e1c19f32770c017]::query_impl::eval_to_allocation_raw::get_query_non_incr::__rust_end_short_backtrace
  29:     0x755fdf99c236 - rustc_middle[20ab712fb3484bec]::query::plumbing::query_get_at::<rustc_query_system[d7adc1b68469f11c]::query::caches::DefaultCache<rustc_middle[20ab712fb3484bec]::ty::ParamEnvAnd<rustc_middle[20ab712fb3484bec]::mir::interpret::GlobalId>, rustc_middle[20ab712fb3484bec]::query::erase::Erased<[u8; 24usize]>>>
  30:     0x755fdf99c4f5 - rustc_const_eval[5995760da6ccdb98]::const_eval::valtrees::eval_to_valtree
  31:     0x755fdf99c489 - <rustc_const_eval[5995760da6ccdb98]::provide::{closure#0} as core[221fd742908fc512]::ops::function::FnOnce<(rustc_middle[20ab712fb3484bec]::ty::context::TyCtxt, rustc_middle[20ab712fb3484bec]::ty::ParamEnvAnd<rustc_middle[20ab712fb3484bec]::mir::interpret::GlobalId>)>>::call_once
  32:     0x755fdf99c440 - rustc_query_impl[2e1c19f32770c017]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2e1c19f32770c017]::query_impl::eval_to_valtree::dynamic_query::{closure#2}::{closure#0}, rustc_middle[20ab712fb3484bec]::query::erase::Erased<[u8; 24usize]>>
  33:     0x755fdf99c401 - <rustc_query_impl[2e1c19f32770c017]::query_impl::eval_to_valtree::dynamic_query::{closure#2} as core[221fd742908fc512]::ops::function::FnOnce<(rustc_middle[20ab712fb3484bec]::ty::context::TyCtxt, rustc_middle[20ab712fb3484bec]::ty::ParamEnvAnd<rustc_middle[20ab712fb3484bec]::mir::interpret::GlobalId>)>>::call_once
  34:     0x755fdf1a06f4 - rustc_query_system[d7adc1b68469f11c]::query::plumbing::try_execute_query::<rustc_query_impl[2e1c19f32770c017]::DynamicConfig<rustc_query_system[d7adc1b68469f11c]::query::caches::DefaultCache<rustc_middle[20ab712fb3484bec]::ty::ParamEnvAnd<rustc_middle[20ab712fb3484bec]::mir::interpret::GlobalId>, rustc_middle[20ab712fb3484bec]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[2e1c19f32770c017]::plumbing::QueryCtxt, false>
  35:     0x755fdf1a0008 - rustc_query_impl[2e1c19f32770c017]::query_impl::eval_to_valtree::get_query_non_incr::__rust_end_short_backtrace
  36:     0x755fdf4570f1 - rustc_middle[20ab712fb3484bec]::query::plumbing::query_get_at::<rustc_query_system[d7adc1b68469f11c]::query::caches::DefaultCache<rustc_middle[20ab712fb3484bec]::ty::ParamEnvAnd<rustc_middle[20ab712fb3484bec]::mir::interpret::GlobalId>, rustc_middle[20ab712fb3484bec]::query::erase::Erased<[u8; 24usize]>>>
  37:     0x755fdf4d2afe - <rustc_middle[20ab712fb3484bec]::ty::context::TyCtxt>::const_eval_global_id_for_typeck
  38:     0x755fdf4d307e - <rustc_middle[20ab712fb3484bec]::ty::context::TyCtxt>::const_eval_resolve_for_typeck
  39:     0x755fdf4d2e26 - <rustc_middle[20ab712fb3484bec]::ty::consts::Const>::eval
  40:     0x755fdee80457 - <rustc_trait_selection[57b953155e7b0930]::traits::normalize::AssocTypeNormalizer as rustc_type_ir[ec233038e902676a]::fold::TypeFolder<rustc_middle[20ab712fb3484bec]::ty::context::TyCtxt>>::fold_const
  41:     0x755fdf561741 - <rustc_middle[20ab712fb3484bec]::ty::Ty as rustc_type_ir[ec233038e902676a]::fold::TypeSuperFoldable<rustc_middle[20ab712fb3484bec]::ty::context::TyCtxt>>::try_super_fold_with::<rustc_trait_selection[57b953155e7b0930]::traits::normalize::AssocTypeNormalizer>
  42:     0x755fdec522bd - <rustc_hir_typeck[590b1a1a80be12ec]::fn_ctxt::FnCtxt>::normalize::<rustc_middle[20ab712fb3484bec]::ty::Ty>
  43:     0x755fdf0c0406 - <dyn rustc_hir_analysis[905f368b2fc9ddf1]::hir_ty_lowering::HirTyLowerer>::lower_ty_common::{closure#0}
  44:     0x755fdf686fe6 - <rustc_hir_typeck[590b1a1a80be12ec]::gather_locals::GatherLocalsVisitor>::declare
  45:     0x755fdc350e52 - <rustc_hir_typeck[590b1a1a80be12ec]::gather_locals::GatherLocalsVisitor as rustc_hir[c6d77eea478f137d]::intravisit::Visitor>::visit_expr
  46:     0x755fdf43484e - rustc_hir_typeck[590b1a1a80be12ec]::check::check_fn
  47:     0x755fdf42a92c - rustc_hir_typeck[590b1a1a80be12ec]::typeck
  48:     0x755fdf42a391 - rustc_query_impl[2e1c19f32770c017]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2e1c19f32770c017]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[20ab712fb3484bec]::query::erase::Erased<[u8; 8usize]>>
  49:     0x755fdf210d6e - rustc_query_system[d7adc1b68469f11c]::query::plumbing::try_execute_query::<rustc_query_impl[2e1c19f32770c017]::DynamicConfig<rustc_query_system[d7adc1b68469f11c]::query::caches::VecCache<rustc_span[51dc3a994d050bac]::def_id::LocalDefId, rustc_middle[20ab712fb3484bec]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[2e1c19f32770c017]::plumbing::QueryCtxt, false>
  50:     0x755fdf20f895 - rustc_query_impl[2e1c19f32770c017]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
  51:     0x755fdf20f4cb - <rustc_middle[20ab712fb3484bec]::hir::map::Map>::par_body_owners::<rustc_hir_analysis[905f368b2fc9ddf1]::check_crate::{closure#4}>::{closure#0}
  52:     0x755fdf20df8b - rustc_hir_analysis[905f368b2fc9ddf1]::check_crate
  53:     0x755fdf16fd3e - rustc_interface[6bfa9daba1d5b6c2]::passes::analysis
  54:     0x755fdf16f89b - rustc_query_impl[2e1c19f32770c017]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[2e1c19f32770c017]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[20ab712fb3484bec]::query::erase::Erased<[u8; 1usize]>>
  55:     0x755fdf9de8e5 - rustc_query_system[d7adc1b68469f11c]::query::plumbing::try_execute_query::<rustc_query_impl[2e1c19f32770c017]::DynamicConfig<rustc_query_system[d7adc1b68469f11c]::query::caches::SingleCache<rustc_middle[20ab712fb3484bec]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[2e1c19f32770c017]::plumbing::QueryCtxt, false>
  56:     0x755fdf9de64f - rustc_query_impl[2e1c19f32770c017]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  57:     0x755fdf7d1ce0 - rustc_interface[6bfa9daba1d5b6c2]::interface::run_compiler::<core[221fd742908fc512]::result::Result<(), rustc_span[51dc3a994d050bac]::ErrorGuaranteed>, rustc_driver_impl[c42a3492d6f6b9ec]::run_compiler::{closure#0}>::{closure#1}
  58:     0x755fdf7bd649 - std[45eea3d871d24ad6]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[6bfa9daba1d5b6c2]::util::run_in_thread_with_globals<rustc_interface[6bfa9daba1d5b6c2]::util::run_in_thread_pool_with_globals<rustc_interface[6bfa9daba1d5b6c2]::interface::run_compiler<core[221fd742908fc512]::result::Result<(), rustc_span[51dc3a994d050bac]::ErrorGuaranteed>, rustc_driver_impl[c42a3492d6f6b9ec]::run_compiler::{closure#0}>::{closure#1}, core[221fd742908fc512]::result::Result<(), rustc_span[51dc3a994d050bac]::ErrorGuaranteed>>::{closure#0}, core[221fd742908fc512]::result::Result<(), rustc_span[51dc3a994d050bac]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[221fd742908fc512]::result::Result<(), rustc_span[51dc3a994d050bac]::ErrorGuaranteed>>
  59:     0x755fdf7bd400 - <<std[45eea3d871d24ad6]::thread::Builder>::spawn_unchecked_<rustc_interface[6bfa9daba1d5b6c2]::util::run_in_thread_with_globals<rustc_interface[6bfa9daba1d5b6c2]::util::run_in_thread_pool_with_globals<rustc_interface[6bfa9daba1d5b6c2]::interface::run_compiler<core[221fd742908fc512]::result::Result<(), rustc_span[51dc3a994d050bac]::ErrorGuaranteed>, rustc_driver_impl[c42a3492d6f6b9ec]::run_compiler::{closure#0}>::{closure#1}, core[221fd742908fc512]::result::Result<(), rustc_span[51dc3a994d050bac]::ErrorGuaranteed>>::{closure#0}, core[221fd742908fc512]::result::Result<(), rustc_span[51dc3a994d050bac]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[221fd742908fc512]::result::Result<(), rustc_span[51dc3a994d050bac]::ErrorGuaranteed>>::{closure#2} as core[221fd742908fc512]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  60:     0x755fe1097bfb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h715ce95eefcc4a2c
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/alloc/src/boxed.rs:2063:9
  61:     0x755fe1097bfb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h502013687618e5e5
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/alloc/src/boxed.rs:2063:9
  62:     0x755fe1097bfb - std::sys::pal::unix::thread::Thread::new::thread_start::ha0246e0960ff3ff1
                               at /rustc/f67a1acc04c7ecbf05751b17592dd8d245b75256/library/std/src/sys/pal/unix/thread.rs:108:17
  63:     0x755fe0e341cf - <unknown>
  64:     0x755fe0eb56ec - <unknown>
  65:                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 `/tmp/rustc-ice-2024-06-02T04_56_37-2417198.txt` to your bug report

query stack during panic:
#0 [fn_abi_of_instance] computing call ABI of `<impl at lol.rs:9:1: 9:18>::dim`
#1 [eval_to_allocation_raw] const-evaluating + checking `main::{constant#0}`
end of query stack
error: aborting due to 2 previous errors

Some errors have detailed explanations: E0049, E0658.
For more information about an error, try `rustc --explain E0049`.