Repository: rust
Issue: ice: `Attempting to cast non-castable types fn({type error}) -> Foo {Foo::Bar} and usize`
Labels: I-ICE,P-low,T-compiler,regression-from-stable-to-stable,C-bug,glacier

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### Code

```Rust
enum Foo {
    Bar(B),
}

trait Bar {}

impl Bar for [u32; Foo::Bar as usize] {}
```


### Meta
<!--
If you're using the stable version of the compiler, you should also check if the
bug also exists in the beta or nightly versions.
-->

`rustc --version --verbose`:
```
rustc 1.72.0-nightly (7b0eac438 2023-06-14)
binary: rustc
commit-hash: 7b0eac438ace0ba305b4633328b00474fbbf5120
commit-date: 2023-06-14
host: x86_64-unknown-linux-gnu
release: 1.72.0-nightly
LLVM version: 16.0.5
```

### Error output

```
error[E0412]: cannot find type `B` in this scope
 --> treereduce.out:2:9
  |
2 |     Bar(B),
  |         ^ not found in this scope
  |
help: you might be missing a type parameter
  |
1 | enum Foo<B> {
  |         +++

error[E0601]: `main` function not found in crate `treereduce`
 --> treereduce.out:7:41
  |
7 | impl Bar for [u32; Foo::Bar as usize] {}
  |                                         ^ consider adding a `main` function to `treereduce.out`
```

<!--
Include a backtrace in the code block by setting `RUST_BACKTRACE=1` in your
environment. E.g. `RUST_BACKTRACE=1 cargo build`.
-->
<details><summary><strong>Backtrace</strong></summary>
<p>

```
error: internal compiler error: compiler/rustc_middle/src/ty/cast.rs:99:13: Attempting to cast non-castable types fn({type error}) -> Foo {Foo::Bar} and usize

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/compiler/rustc_errors/src/lib.rs:1650:9
stack backtrace:
   0:     0x7ff378d68c41 - std::backtrace_rs::backtrace::libunwind::trace::hd5b7972f789c4974
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7ff378d68c41 - std::backtrace_rs::backtrace::trace_unsynchronized::h938f2c39be6402c9
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7ff378d68c41 - std::sys_common::backtrace::_print_fmt::hf19df4df321a9f93
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7ff378d68c41 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd26317478e51975e
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7ff378dc95ff - core::fmt::rt::Argument::fmt::h16c7790b1e3f1543
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/core/src/fmt/rt.rs:138:9
   5:     0x7ff378dc95ff - core::fmt::write::h6ebd457ad24c415a
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/core/src/fmt/mod.rs:1094:21
   6:     0x7ff378d5be41 - std::io::Write::write_fmt::h0c198b050bd0b55a
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/std/src/io/mod.rs:1713:15
   7:     0x7ff378d68a55 - std::sys_common::backtrace::_print::h369a7cf325feecb2
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7ff378d68a55 - std::sys_common::backtrace::print::h8375e9dd85dcd975
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7ff378d6b737 - std::panicking::default_hook::{{closure}}::h0cff43e655091646
  10:     0x7ff378d6b524 - std::panicking::default_hook::h28fa1651a8383aac
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/std/src/panicking.rs:288:9
  11:     0x7ff37bfcd25b - <rustc_driver_impl[d1aa6109471fdd45]::install_ice_hook::{closure#0} as core[9d3b7bf065738f73]::ops::function::FnOnce<(&core[9d3b7bf065738f73]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  12:     0x7ff378d6be7d - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h5e01b737276d5f55
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/alloc/src/boxed.rs:1999:9
  13:     0x7ff378d6be7d - std::panicking::rust_panic_with_hook::hb6b23c86320f793c
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/std/src/panicking.rs:709:13
  14:     0x7ff37c4e5821 - std[c901bbae7dc26da3]::panicking::begin_panic::<rustc_errors[6a86a7f75c9c57b7]::ExplicitBug>::{closure#0}
  15:     0x7ff37c4e1546 - std[c901bbae7dc26da3]::sys_common::backtrace::__rust_end_short_backtrace::<std[c901bbae7dc26da3]::panicking::begin_panic<rustc_errors[6a86a7f75c9c57b7]::ExplicitBug>::{closure#0}, !>
  16:     0x7ff37c55c3d6 - std[c901bbae7dc26da3]::panicking::begin_panic::<rustc_errors[6a86a7f75c9c57b7]::ExplicitBug>
  17:     0x7ff37c4db944 - <rustc_errors[6a86a7f75c9c57b7]::HandlerInner>::bug::<alloc[a7b65b885799e8e7]::string::String>
  18:     0x7ff37c4db6e6 - <rustc_errors[6a86a7f75c9c57b7]::Handler>::bug::<alloc[a7b65b885799e8e7]::string::String>
  19:     0x7ff37c56a0f5 - rustc_middle[c2220a5f32aee4a9]::util::bug::opt_span_bug_fmt::<rustc_span[9591d6886b6f356b]::span_encoding::Span>::{closure#0}
  20:     0x7ff37c566d0a - rustc_middle[c2220a5f32aee4a9]::ty::context::tls::with_opt::<rustc_middle[c2220a5f32aee4a9]::util::bug::opt_span_bug_fmt<rustc_span[9591d6886b6f356b]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7ff37c566cda - rustc_middle[c2220a5f32aee4a9]::ty::context::tls::with_context_opt::<rustc_middle[c2220a5f32aee4a9]::ty::context::tls::with_opt<rustc_middle[c2220a5f32aee4a9]::util::bug::opt_span_bug_fmt<rustc_span[9591d6886b6f356b]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7ff37a256f0d - rustc_middle[c2220a5f32aee4a9]::util::bug::bug_fmt
  23:     0x7ff37a340010 - rustc_middle[c2220a5f32aee4a9]::ty::cast::mir_cast_kind
  24:     0x7ff37a311846 - <rustc_mir_build[e9c88e24b8a1c27a]::build::Builder>::as_rvalue
  25:     0x7ff37a323a43 - <rustc_mir_build[e9c88e24b8a1c27a]::build::Builder>::expr_into_dest
  26:     0x7ff37a3236e9 - <rustc_mir_build[e9c88e24b8a1c27a]::build::Builder>::expr_into_dest
  27:     0x7ff37a3236e9 - <rustc_mir_build[e9c88e24b8a1c27a]::build::Builder>::expr_into_dest
  28:     0x7ff37ae23cd1 - rustc_mir_build[e9c88e24b8a1c27a]::build::mir_built
  29:     0x7ff37a0060cc - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::mir_built::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 8usize]>>
  30:     0x7ff37a0060ae - <rustc_query_impl[77c04cfc11717055]::query_impl::mir_built::dynamic_query::{closure#2} as core[9d3b7bf065738f73]::ops::function::FnOnce<(rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt, rustc_span[9591d6886b6f356b]::def_id::LocalDefId)>>::call_once
  31:     0x7ff37a0efc2d - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::VecCache<rustc_span[9591d6886b6f356b]::def_id::LocalDefId, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  32:     0x7ff37b95148f - rustc_query_impl[77c04cfc11717055]::query_impl::mir_built::get_query_non_incr::__rust_end_short_backtrace
  33:     0x7ff37b05cade - rustc_mir_transform[cafb922bcd4bfee1]::check_unsafety::unsafety_check_result
  34:     0x7ff37a00610c - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::unsafety_check_result::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 8usize]>>
  35:     0x7ff37a0060ee - <rustc_query_impl[77c04cfc11717055]::query_impl::unsafety_check_result::dynamic_query::{closure#2} as core[9d3b7bf065738f73]::ops::function::FnOnce<(rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt, rustc_span[9591d6886b6f356b]::def_id::LocalDefId)>>::call_once
  36:     0x7ff37a0efc2d - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::VecCache<rustc_span[9591d6886b6f356b]::def_id::LocalDefId, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  37:     0x7ff37b95312f - rustc_query_impl[77c04cfc11717055]::query_impl::unsafety_check_result::get_query_non_incr::__rust_end_short_backtrace
  38:     0x7ff37b385ff4 - rustc_mir_transform[cafb922bcd4bfee1]::mir_const
  39:     0x7ff37a0201fe - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::mir_const::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 8usize]>>
  40:     0x7ff37a0201ce - <rustc_query_impl[77c04cfc11717055]::query_impl::mir_const::dynamic_query::{closure#2} as core[9d3b7bf065738f73]::ops::function::FnOnce<(rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt, rustc_span[9591d6886b6f356b]::def_id::LocalDefId)>>::call_once
  41:     0x7ff37a0efc2d - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::VecCache<rustc_span[9591d6886b6f356b]::def_id::LocalDefId, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  42:     0x7ff37b95157f - rustc_query_impl[77c04cfc11717055]::query_impl::mir_const::get_query_non_incr::__rust_end_short_backtrace
  43:     0x7ff37a28e6ec - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::mir_const_qualif::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 5usize]>>
  44:     0x7ff37ae1870f - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::DefaultCache<rustc_span[9591d6886b6f356b]::def_id::DefId, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 5usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  45:     0x7ff37ae18438 - rustc_query_impl[77c04cfc11717055]::query_impl::mir_const_qualif::get_query_non_incr::__rust_end_short_backtrace
  46:     0x7ff37adef3b9 - rustc_mir_transform[cafb922bcd4bfee1]::mir_promoted
  47:     0x7ff379fefcdf - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::mir_promoted::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 16usize]>>
  48:     0x7ff37a94987b - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::VecCache<rustc_span[9591d6886b6f356b]::def_id::LocalDefId, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  49:     0x7ff37b951975 - rustc_query_impl[77c04cfc11717055]::query_impl::mir_promoted::get_query_non_incr::__rust_end_short_backtrace
  50:     0x7ff37af80bbc - rustc_borrowck[2bd87ad0ff331ce3]::mir_borrowck
  51:     0x7ff37a02019e - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 8usize]>>
  52:     0x7ff37a02016e - <rustc_query_impl[77c04cfc11717055]::query_impl::mir_borrowck::dynamic_query::{closure#2} as core[9d3b7bf065738f73]::ops::function::FnOnce<(rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt, rustc_span[9591d6886b6f356b]::def_id::LocalDefId)>>::call_once
  53:     0x7ff37a0efc2d - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::VecCache<rustc_span[9591d6886b6f356b]::def_id::LocalDefId, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  54:     0x7ff37b9536ff - rustc_query_impl[77c04cfc11717055]::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace
  55:     0x7ff37a79edf0 - rustc_mir_transform[cafb922bcd4bfee1]::mir_drops_elaborated_and_const_checked
  56:     0x7ff37a0376ee - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 8usize]>>
  57:     0x7ff37a0376be - <rustc_query_impl[77c04cfc11717055]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2} as core[9d3b7bf065738f73]::ops::function::FnOnce<(rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt, rustc_span[9591d6886b6f356b]::def_id::LocalDefId)>>::call_once
  58:     0x7ff37a0efc2d - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::VecCache<rustc_span[9591d6886b6f356b]::def_id::LocalDefId, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  59:     0x7ff37b95177f - rustc_query_impl[77c04cfc11717055]::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
  60:     0x7ff37abea99c - rustc_mir_transform[cafb922bcd4bfee1]::mir_for_ctfe
  61:     0x7ff37a07db56 - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::mir_for_ctfe::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 8usize]>>
  62:     0x7ff37a07db31 - <rustc_query_impl[77c04cfc11717055]::query_impl::mir_for_ctfe::dynamic_query::{closure#2} as core[9d3b7bf065738f73]::ops::function::FnOnce<(rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt, rustc_span[9591d6886b6f356b]::def_id::DefId)>>::call_once
  63:     0x7ff37a01fa45 - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::DefaultCache<rustc_span[9591d6886b6f356b]::def_id::DefId, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  64:     0x7ff37b951882 - rustc_query_impl[77c04cfc11717055]::query_impl::mir_for_ctfe::get_query_non_incr::__rust_end_short_backtrace
  65:     0x7ff37a490b23 - <rustc_const_eval[e6ffc898df0b836]::interpret::eval_context::InterpCx<rustc_const_eval[e6ffc898df0b836]::const_eval::machine::CompileTimeInterpreter>>::load_mir
  66:     0x7ff37a3cc030 - rustc_const_eval[e6ffc898df0b836]::const_eval::eval_queries::eval_to_allocation_raw_provider
  67:     0x7ff37a079977 - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 16usize]>>
  68:     0x7ff37ac1232c - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::DefaultCache<rustc_middle[c2220a5f32aee4a9]::ty::ParamEnvAnd<rustc_middle[c2220a5f32aee4a9]::mir::interpret::GlobalId>, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  69:     0x7ff37ac11ffb - rustc_query_impl[77c04cfc11717055]::query_impl::eval_to_allocation_raw::get_query_non_incr::__rust_end_short_backtrace
  70:     0x7ff37a3cc682 - rustc_const_eval[e6ffc898df0b836]::const_eval::eval_queries::eval_to_allocation_raw_provider
  71:     0x7ff37a079977 - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 16usize]>>
  72:     0x7ff37ac1232c - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::DefaultCache<rustc_middle[c2220a5f32aee4a9]::ty::ParamEnvAnd<rustc_middle[c2220a5f32aee4a9]::mir::interpret::GlobalId>, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  73:     0x7ff37ac11ffb - rustc_query_impl[77c04cfc11717055]::query_impl::eval_to_allocation_raw::get_query_non_incr::__rust_end_short_backtrace
  74:     0x7ff37b70ca88 - rustc_const_eval[e6ffc898df0b836]::const_eval::eval_to_valtree
  75:     0x7ff37b70c8e0 - <rustc_const_eval[e6ffc898df0b836]::provide::{closure#0} as core[9d3b7bf065738f73]::ops::function::FnOnce<(rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt, rustc_middle[c2220a5f32aee4a9]::ty::ParamEnvAnd<rustc_middle[c2220a5f32aee4a9]::mir::interpret::GlobalId>)>>::call_once
  76:     0x7ff37b3f4b79 - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::eval_to_valtree::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 24usize]>>
  77:     0x7ff37b3f4b28 - <rustc_query_impl[77c04cfc11717055]::query_impl::eval_to_valtree::dynamic_query::{closure#2} as core[9d3b7bf065738f73]::ops::function::FnOnce<(rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt, rustc_middle[c2220a5f32aee4a9]::ty::ParamEnvAnd<rustc_middle[c2220a5f32aee4a9]::mir::interpret::GlobalId>)>>::call_once
  78:     0x7ff37b59c478 - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::DefaultCache<rustc_middle[c2220a5f32aee4a9]::ty::ParamEnvAnd<rustc_middle[c2220a5f32aee4a9]::mir::interpret::GlobalId>, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  79:     0x7ff37b59c16b - rustc_query_impl[77c04cfc11717055]::query_impl::eval_to_valtree::get_query_non_incr::__rust_end_short_backtrace
  80:     0x7ff37a74d2bc - rustc_middle[c2220a5f32aee4a9]::query::plumbing::query_get_at::<rustc_query_system[21afab51dde9dbf3]::query::caches::DefaultCache<rustc_middle[c2220a5f32aee4a9]::ty::ParamEnvAnd<rustc_middle[c2220a5f32aee4a9]::mir::interpret::GlobalId>, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 24usize]>>>
  81:     0x7ff37a74cfc3 - <rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt>::const_eval_global_id_for_typeck
  82:     0x7ff37a74cb7c - <rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt>::const_eval_resolve_for_typeck
  83:     0x7ff37a743edf - <rustc_middle[c2220a5f32aee4a9]::ty::consts::Const>::eval
  84:     0x7ff37a71cbaf - <rustc_trait_selection[63bfde0f7f8720d]::traits::project::AssocTypeNormalizer as rustc_type_ir[eee4d87b09b8b7ec]::fold::TypeFolder<rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt>>::fold_const
  85:     0x7ff37a6fc6f2 - <rustc_trait_selection[63bfde0f7f8720d]::traits::project::AssocTypeNormalizer as rustc_type_ir[eee4d87b09b8b7ec]::fold::TypeFolder<rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt>>::fold_ty
  86:     0x7ff37adcc359 - <&rustc_middle[c2220a5f32aee4a9]::ty::list::List<rustc_middle[c2220a5f32aee4a9]::ty::subst::GenericArg> as rustc_type_ir[eee4d87b09b8b7ec]::fold::TypeFoldable<rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt>>::try_fold_with::<rustc_trait_selection[63bfde0f7f8720d]::traits::project::AssocTypeNormalizer>
  87:     0x7ff37a9d9a8f - <rustc_trait_selection[63bfde0f7f8720d]::traits::project::AssocTypeNormalizer>::fold::<rustc_middle[c2220a5f32aee4a9]::ty::sty::TraitRef>
  88:     0x7ff37a9d95e7 - rustc_trait_selection[63bfde0f7f8720d]::traits::project::normalize_with_depth::<rustc_middle[c2220a5f32aee4a9]::ty::sty::TraitRef>
  89:     0x7ff37ae90281 - <rustc_trait_selection[63bfde0f7f8720d]::traits::engine::ObligationCtxt>::normalize::<rustc_middle[c2220a5f32aee4a9]::ty::sty::TraitRef>
  90:     0x7ff37ae8d936 - rustc_hir_analysis[812eaf4e0aeb5a6e]::check::wfcheck::check_well_formed
  91:     0x7ff379fe384c - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::check_well_formed::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 0usize]>>
  92:     0x7ff37a869966 - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::VecCache<rustc_hir[417e52bdb6051adf]::hir_id::OwnerId, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  93:     0x7ff37a8696d2 - rustc_query_impl[77c04cfc11717055]::query_impl::check_well_formed::get_query_non_incr::__rust_end_short_backtrace
  94:     0x7ff37b3a03dc - rustc_data_structures[b715d01ec5ecbd6f]::sync::par_for_each_in::<&[rustc_hir[417e52bdb6051adf]::hir::ItemId], <rustc_middle[c2220a5f32aee4a9]::hir::ModuleItems>::par_items<rustc_hir_analysis[812eaf4e0aeb5a6e]::check::wfcheck::check_mod_type_wf::{closure#0}>::{closure#0}>
  95:     0x7ff37b3a028a - rustc_hir_analysis[812eaf4e0aeb5a6e]::check::wfcheck::check_mod_type_wf
  96:     0x7ff37ac6351c - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::check_mod_type_wf::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 0usize]>>
  97:     0x7ff37ac634fe - <rustc_query_impl[77c04cfc11717055]::query_impl::check_mod_type_wf::dynamic_query::{closure#2} as core[9d3b7bf065738f73]::ops::function::FnOnce<(rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt, rustc_span[9591d6886b6f356b]::def_id::LocalDefId)>>::call_once
  98:     0x7ff37a6d906f - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::VecCache<rustc_span[9591d6886b6f356b]::def_id::LocalDefId, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
  99:     0x7ff37b95b6a2 - rustc_query_impl[77c04cfc11717055]::query_impl::check_mod_type_wf::get_query_non_incr::__rust_end_short_backtrace
 100:     0x7ff37b489e57 - rustc_data_structures[b715d01ec5ecbd6f]::sync::par_for_each_in::<&[rustc_hir[417e52bdb6051adf]::hir_id::OwnerId], <rustc_middle[c2220a5f32aee4a9]::hir::map::Map>::par_for_each_module<rustc_hir_analysis[812eaf4e0aeb5a6e]::check_crate::{closure#5}::{closure#0}::{closure#0}>::{closure#0}>
 101:     0x7ff37b489c27 - <rustc_session[1ee1d215f1830d4a]::session::Session>::track_errors::<rustc_hir_analysis[812eaf4e0aeb5a6e]::check_crate::{closure#5}, ()>
 102:     0x7ff37b48716f - rustc_hir_analysis[812eaf4e0aeb5a6e]::check_crate
 103:     0x7ff37b48148a - rustc_interface[acec405c1e433d19]::passes::analysis
 104:     0x7ff37b4e3eea - rustc_query_impl[77c04cfc11717055]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[77c04cfc11717055]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 1usize]>>
 105:     0x7ff37b4e3ed9 - <rustc_query_impl[77c04cfc11717055]::query_impl::analysis::dynamic_query::{closure#2} as core[9d3b7bf065738f73]::ops::function::FnOnce<(rustc_middle[c2220a5f32aee4a9]::ty::context::TyCtxt, ())>>::call_once
 106:     0x7ff37b668e08 - rustc_query_system[21afab51dde9dbf3]::query::plumbing::try_execute_query::<rustc_query_impl[77c04cfc11717055]::DynamicConfig<rustc_query_system[21afab51dde9dbf3]::query::caches::SingleCache<rustc_middle[c2220a5f32aee4a9]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[77c04cfc11717055]::plumbing::QueryCtxt, false>
 107:     0x7ff37b668be7 - rustc_query_impl[77c04cfc11717055]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
 108:     0x7ff37b641cb5 - <rustc_middle[c2220a5f32aee4a9]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[d1aa6109471fdd45]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[9d3b7bf065738f73]::result::Result<(), rustc_span[9591d6886b6f356b]::ErrorGuaranteed>>
 109:     0x7ff37b23b41b - <rustc_interface[acec405c1e433d19]::interface::Compiler>::enter::<rustc_driver_impl[d1aa6109471fdd45]::run_compiler::{closure#1}::{closure#2}, core[9d3b7bf065738f73]::result::Result<core[9d3b7bf065738f73]::option::Option<rustc_interface[acec405c1e433d19]::queries::Linker>, rustc_span[9591d6886b6f356b]::ErrorGuaranteed>>
 110:     0x7ff37b238fb9 - <scoped_tls[eb9c878293193d5c]::ScopedKey<rustc_span[9591d6886b6f356b]::SessionGlobals>>::set::<rustc_interface[acec405c1e433d19]::interface::run_compiler<core[9d3b7bf065738f73]::result::Result<(), rustc_span[9591d6886b6f356b]::ErrorGuaranteed>, rustc_driver_impl[d1aa6109471fdd45]::run_compiler::{closure#1}>::{closure#0}, core[9d3b7bf065738f73]::result::Result<(), rustc_span[9591d6886b6f356b]::ErrorGuaranteed>>
 111:     0x7ff37b238426 - std[c901bbae7dc26da3]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[acec405c1e433d19]::util::run_in_thread_pool_with_globals<rustc_interface[acec405c1e433d19]::interface::run_compiler<core[9d3b7bf065738f73]::result::Result<(), rustc_span[9591d6886b6f356b]::ErrorGuaranteed>, rustc_driver_impl[d1aa6109471fdd45]::run_compiler::{closure#1}>::{closure#0}, core[9d3b7bf065738f73]::result::Result<(), rustc_span[9591d6886b6f356b]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[9d3b7bf065738f73]::result::Result<(), rustc_span[9591d6886b6f356b]::ErrorGuaranteed>>
 112:     0x7ff37b2381d5 - <<std[c901bbae7dc26da3]::thread::Builder>::spawn_unchecked_<rustc_interface[acec405c1e433d19]::util::run_in_thread_pool_with_globals<rustc_interface[acec405c1e433d19]::interface::run_compiler<core[9d3b7bf065738f73]::result::Result<(), rustc_span[9591d6886b6f356b]::ErrorGuaranteed>, rustc_driver_impl[d1aa6109471fdd45]::run_compiler::{closure#1}>::{closure#0}, core[9d3b7bf065738f73]::result::Result<(), rustc_span[9591d6886b6f356b]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[9d3b7bf065738f73]::result::Result<(), rustc_span[9591d6886b6f356b]::ErrorGuaranteed>>::{closure#1} as core[9d3b7bf065738f73]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
 113:     0x7ff378d763a5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf9fefea5dd71558b
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/alloc/src/boxed.rs:1985:9
 114:     0x7ff378d763a5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h8c988cde4d28b483
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/alloc/src/boxed.rs:1985:9
 115:     0x7ff378d763a5 - std::sys::unix::thread::Thread::new::thread_start::hac03aed06feb4b93
                               at /rustc/7b0eac438ace0ba305b4633328b00474fbbf5120/library/std/src/sys/unix/thread.rs:108:17
 116:     0x7ff378b0f44b - <unknown>
 117:     0x7ff378b92e40 - <unknown>
 118:                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 1.72.0-nightly (7b0eac438 2023-06-14) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [mir_built] building MIR for `<impl at treereduce.out:7:1: 7:38>::{constant#0}`
#1 [unsafety_check_result] unsafety-checking `<impl at treereduce.out:7:1: 7:38>::{constant#0}`
#2 [mir_const] preparing `<impl at treereduce.out:7:1: 7:38>::{constant#0}` for borrow checking
#3 [mir_const_qualif] const checking `<impl at treereduce.out:7:1: 7:38>::{constant#0}`
#4 [mir_promoted] promoting constants in MIR for `<impl at treereduce.out:7:1: 7:38>::{constant#0}`
#5 [mir_borrowck] borrow-checking `<impl at treereduce.out:7:1: 7:38>::{constant#0}`
#6 [mir_drops_elaborated_and_const_checked] elaborating drops for `<impl at treereduce.out:7:1: 7:38>::{constant#0}`
#7 [mir_for_ctfe] caching mir of `<impl at treereduce.out:7:1: 7:38>::{constant#0}` for CTFE
#8 [eval_to_allocation_raw] const-evaluating + checking `<impl at treereduce.out:7:1: 7:38>::{constant#0}`
#9 [eval_to_allocation_raw] const-evaluating + checking `<impl at treereduce.out:7:1: 7:38>::{constant#0}`
#10 [eval_to_valtree] evaluating type-level constant
#11 [check_well_formed] checking that `<impl at treereduce.out:7:1: 7:38>` is well-formed
#12 [check_mod_type_wf] checking that types are well-formed in top-level module
#13 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 3 previous errors

Some errors have detailed explanations: E0412, E0601.
For more information about an error, try `rustc --explain E0412`.
```

</p>
</details>