ICE: `Unexpected node AnonConst(AnonConst..`

[matthiaskrgr]

auto-reduced (treereduce-rust):

trait Traitor<const N: N<2> = 1, const N: N<2> = N> {
    fn N(&N) -> N<2> {
        M
    }
}

trait N<const N: Traitor<2> = 12> {}

original:

// run-pass
trait Trait<const N: N<2> = 12> {
    fn uwu(&self) -> Traitor<2> {
        N
    }
}

impl N for N {}

impl N<12> for N {
    fn N(&N) -> N<2> {
        *self as N
    }
}

fn foo(N: &dyn Trait) -> Traitor<2> {
    N.uwu()
}

trait Traitor<const N: N<2> = 1, const N: N<2> = N> {
    fn N(&N) -> N<2> {
        M
    }
}

impl N<2> for N { }
impl N for N<2> {
    fn N(&self) -> Traitor {
        *N
    }
}

fn bar<const N: N<2>>(N: &dyn Traitor<2><N>) -> Traitor<12> {
    arg.N()
}

trait N<const N: Traitor<2> = 12> {
    fn N(&N) -> N<2> {
        *N as N<2>
    }
}

Version information

rustc 1.79.0-nightly (548e14b43 2024-03-24)
binary: rustc
commit-hash: 548e14b43963882fb758deb89e8258d9b8c2fc2a
commit-date: 2024-03-24
host: x86_64-unknown-linux-gnu
release: 1.79.0-nightly
LLVM version: 18.1.2

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc -Zincremental-verify-ich=yes -Cincremental=<dir> -Cdebuginfo=2

Program output

error[E0403]: the name `N` is already used for a generic parameter in this item's generic parameters
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:10:40
   |
10 | trait Traitor<const N: N<2> = 1, const N: N<2> = N> {
   |                     - first use of `N` ^ already used

error[E0425]: cannot find value `M` in this scope
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:12:9
   |
12 |         M
   |         ^ not found in this scope

warning: anonymous parameters are deprecated and will be removed in the next edition
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:11:10
   |
11 |     fn N(&N) -> N<2> {
   |          ^^ help: try naming the parameter or explicitly ignoring it: `_: &N`
   |
   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
   = note: `#[warn(anonymous_parameters)]` on by default

error[E0601]: `main` function not found in crate `mvce`
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:23:2
   |
23 | }
   |  ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs`

warning: trait objects without an explicit `dyn` are deprecated
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:10:24
   |
10 | trait Traitor<const N: N<2> = 1, const N: N<2> = N> {
   |                        ^^^^
   |
   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
   = note: `#[warn(bare_trait_objects)]` on by default
help: if this is an object-safe trait, use `dyn`
   |
10 | trait Traitor<const N: dyn N<2> = 1, const N: N<2> = N> {
   |                        +++

warning: trait objects without an explicit `dyn` are deprecated
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:21:18
   |
21 | trait N<const N: Traitor<2> = 12> {
   |                  ^^^^^^^^^^
   |
   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
help: if this is an object-safe trait, use `dyn`
   |
21 | trait N<const N: dyn Traitor<2> = 12> {
   |                  +++

error[E0391]: cycle detected when computing type of `Traitor::N`
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:10:15
   |
10 | trait Traitor<const N: N<2> = 1, const N: N<2> = N> {
   |               ^^^^^^^^^^^^^^^^^
   |
note: ...which requires computing type of `N::N`...
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:21:9
   |
21 | trait N<const N: Traitor<2> = 12> {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^
   = note: ...which again requires computing type of `Traitor::N`, completing the cycle
note: cycle used when computing explicit predicates of trait `Traitor`
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:10:1
   |
10 | trait Traitor<const N: N<2> = 1, const N: N<2> = N> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information

warning: trait objects without an explicit `dyn` are deprecated
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:10:43
   |
10 | trait Traitor<const N: N<2> = 1, const N: N<2> = N> {
   |                                           ^^^^
   |
   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
help: if this is an object-safe trait, use `dyn`
   |
10 | trait Traitor<const N: N<2> = 1, const N: dyn N<2> = N> {
   |                                           +++

error[E0391]: cycle detected when computing type of `N::N`
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:21:18
   |
21 | trait N<const N: Traitor<2> = 12> {
   |                  ^^^^^^^^^^
   |
note: ...which requires computing type of `Traitor::N`...
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:10:34
   |
10 | trait Traitor<const N: N<2> = 1, const N: N<2> = N> {
   |                                  ^^^^^^^^^^^^^^^^^
   = note: ...which again requires computing type of `N::N`, completing the cycle
note: cycle used when computing type of `Traitor::N`
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:10:15
   |
10 | trait Traitor<const N: N<2> = 1, const N: N<2> = N> {
   |               ^^^^^^^^^^^^^^^^^
   = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information

warning: trait objects without an explicit `dyn` are deprecated
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:11:11
   |
11 |     fn N(&N) -> N<2> {
   |           ^
   |
   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
help: if this is an object-safe trait, use `dyn`
   |
11 |     fn N(&dyn N) -> N<2> {
   |           +++

warning: trait objects without an explicit `dyn` are deprecated
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:11:17
   |
11 |     fn N(&N) -> N<2> {
   |                 ^^^^
   |
   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
help: if this is an object-safe trait, use `dyn`
   |
11 |     fn N(&N) -> dyn N<2> {
   |                 +++

error: internal compiler error: compiler/rustc_hir_analysis/src/hir_wf_check.rs:176:25: Unexpected node AnonConst(AnonConst { hir_id: HirId(DefId(0:3 ~ mvce[6cbd]::Traitor).1), def_id: DefId(0:5 ~ mvce[6cbd]::Traitor::{constant#0}), body: BodyId { hir_id: HirId(DefId(0:3 ~ mvce[6cbd]::Traitor).2) } })

thread 'rustc' panicked at compiler/rustc_hir_analysis/src/hir_wf_check.rs:176:25:
Box<dyn Any>
stack backtrace:
   0:     0x753a24785fd5 - std::backtrace_rs::backtrace::libunwind::trace::h42bff1a7b43dd59b
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
   1:     0x753a24785fd5 - std::backtrace_rs::backtrace::trace_unsynchronized::h487df93320a9df04
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x753a24785fd5 - std::sys_common::backtrace::_print_fmt::h07de1da949170707
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x753a24785fd5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h844cac6fe47b48fc
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x753a247d707b - core::fmt::rt::Argument::fmt::hb8e1c63e19804b9f
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/core/src/fmt/rt.rs:142:9
   5:     0x753a247d707b - core::fmt::write::h48ca3d8ec7493938
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/core/src/fmt/mod.rs:1153:17
   6:     0x753a2477ad6f - std::io::Write::write_fmt::he2f539f86a4d5187
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/std/src/io/mod.rs:1843:15
   7:     0x753a24785dae - std::sys_common::backtrace::_print::hf0fb6b45269a2f11
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x753a24785dae - std::sys_common::backtrace::print::h03209c69877615dd
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x753a24788a29 - std::panicking::default_hook::{{closure}}::h101bae6d8c9043af
  10:     0x753a24788793 - std::panicking::default_hook::hf5920306d6e4b5b6
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/std/src/panicking.rs:292:9
  11:     0x753a20fcb6ff - std[7fd525226211ab56]::panicking::update_hook::<alloc[2228945b757b350a]::boxed::Box<rustc_driver_impl[e695e332d36d528]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x753a247891c8 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hbe2177d39db84251
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/alloc/src/boxed.rs:2029:9
  13:     0x753a247891c8 - std::panicking::rust_panic_with_hook::h8bee57b94d205fd8
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/std/src/panicking.rs:789:13
  14:     0x753a20ffb4b4 - std[7fd525226211ab56]::panicking::begin_panic::<rustc_errors[5b3120a52f02cd0a]::ExplicitBug>::{closure#0}
  15:     0x753a20ff83d6 - std[7fd525226211ab56]::sys_common::backtrace::__rust_end_short_backtrace::<std[7fd525226211ab56]::panicking::begin_panic<rustc_errors[5b3120a52f02cd0a]::ExplicitBug>::{closure#0}, !>
  16:     0x753a20ff80b6 - std[7fd525226211ab56]::panicking::begin_panic::<rustc_errors[5b3120a52f02cd0a]::ExplicitBug>
  17:     0x753a21004941 - <rustc_errors[5b3120a52f02cd0a]::diagnostic::BugAbort as rustc_errors[5b3120a52f02cd0a]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  18:     0x753a2149518c - rustc_middle[bf205a123b303152]::util::bug::opt_span_bug_fmt::<rustc_span[12522247a56ca943]::span_encoding::Span>::{closure#0}
  19:     0x753a214787ea - rustc_middle[bf205a123b303152]::ty::context::tls::with_opt::<rustc_middle[bf205a123b303152]::util::bug::opt_span_bug_fmt<rustc_span[12522247a56ca943]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  20:     0x753a2147866b - rustc_middle[bf205a123b303152]::ty::context::tls::with_context_opt::<rustc_middle[bf205a123b303152]::ty::context::tls::with_opt<rustc_middle[bf205a123b303152]::util::bug::opt_span_bug_fmt<rustc_span[12522247a56ca943]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  21:     0x753a1f86b850 - rustc_middle[bf205a123b303152]::util::bug::bug_fmt
  22:     0x753a211047ca - rustc_hir_analysis[453de524d8357e9f]::hir_wf_check::diagnostic_hir_wf_check
  23:     0x753a2180b984 - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::diagnostic_hir_wf_check::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>
  24:     0x753a217efb4b - <rustc_query_impl[8bf19dcd17598194]::query_impl::diagnostic_hir_wf_check::dynamic_query::{closure#2} as core[12243c8320863e2a]::ops::function::FnOnce<(rustc_middle[bf205a123b303152]::ty::context::TyCtxt, (rustc_middle[bf205a123b303152]::ty::predicate::Predicate, rustc_middle[bf205a123b303152]::traits::WellFormedLoc))>>::call_once
  25:     0x753a22bfdedd - <rustc_query_system[66463ee761594c26]::query::plumbing::execute_job_incr<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<(rustc_span[12522247a56ca943]::def_id::DefId, rustc_span[12522247a56ca943]::def_id::DefId), rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt>::{closure#2}::{closure#2} as core[12243c8320863e2a]::ops::function::FnOnce<((rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<(rustc_span[12522247a56ca943]::def_id::DefId, rustc_span[12522247a56ca943]::def_id::DefId), rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 1usize]>>, false, false, false>), (rustc_span[12522247a56ca943]::def_id::DefId, rustc_span[12522247a56ca943]::def_id::DefId))>>::call_once
  26:     0x753a21776385 - <rustc_middle[bf205a123b303152]::dep_graph::DepsType as rustc_query_system[66463ee761594c26]::dep_graph::Deps>::with_deps::<<rustc_query_system[66463ee761594c26]::dep_graph::graph::DepGraphData<rustc_middle[bf205a123b303152]::dep_graph::DepsType>>::with_task<(rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<(rustc_middle[bf205a123b303152]::ty::predicate::Predicate, rustc_middle[bf205a123b303152]::traits::WellFormedLoc), rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>, false, false, false>), (rustc_middle[bf205a123b303152]::ty::predicate::Predicate, rustc_middle[bf205a123b303152]::traits::WellFormedLoc), rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>::{closure#0}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>
  27:     0x753a2176ebd3 - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<(rustc_middle[bf205a123b303152]::ty::predicate::Predicate, rustc_middle[bf205a123b303152]::traits::WellFormedLoc), rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  28:     0x753a21836ebe - rustc_query_impl[8bf19dcd17598194]::query_impl::diagnostic_hir_wf_check::get_query_incr::__rust_end_short_backtrace
  29:     0x753a21aff6ae - <rustc_infer[8affd3d964feabc2]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[2dd905f95f64e3d3]::traits::error_reporting::type_err_ctxt_ext::TypeErrCtxtExt>::report_selection_error
  30:     0x753a21b13491 - <rustc_infer[8affd3d964feabc2]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[2dd905f95f64e3d3]::traits::error_reporting::type_err_ctxt_ext::InferCtxtPrivExt>::report_fulfillment_error
  31:     0x753a21afcc6d - <rustc_infer[8affd3d964feabc2]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[2dd905f95f64e3d3]::traits::error_reporting::type_err_ctxt_ext::TypeErrCtxtExt>::report_fulfillment_errors
  32:     0x753a22486c85 - <rustc_hir_typeck[a7b48cbd0228bcc8]::fn_ctxt::FnCtxt>::coerce
  33:     0x753a2247f6af - <rustc_hir_typeck[a7b48cbd0228bcc8]::fn_ctxt::FnCtxt>::demand_coerce
  34:     0x753a22611e18 - rustc_hir_typeck[a7b48cbd0228bcc8]::typeck
  35:     0x753a2260f98d - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>
  36:     0x753a22600eae - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::VecCache<rustc_span[12522247a56ca943]::def_id::LocalDefId, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  37:     0x753a228b93cf - rustc_query_impl[8bf19dcd17598194]::query_impl::typeck::get_query_incr::__rust_end_short_backtrace
  38:     0x753a2282149c - rustc_mir_build[e4d978f7790ce682]::thir::pattern::check_match::check_match
  39:     0x753a2282063b - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::check_match::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 1usize]>>
  40:     0x753a228c6b20 - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::VecCache<rustc_span[12522247a56ca943]::def_id::LocalDefId, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  41:     0x753a224c31ac - rustc_query_impl[8bf19dcd17598194]::query_impl::check_match::get_query_incr::__rust_end_short_backtrace
  42:     0x753a2281013f - rustc_mir_build[e4d978f7790ce682]::build::mir_built
  43:     0x753a22810015 - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::mir_built::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>
  44:     0x753a22600eae - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::VecCache<rustc_span[12522247a56ca943]::def_id::LocalDefId, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  45:     0x753a228b914a - rustc_query_impl[8bf19dcd17598194]::query_impl::mir_built::get_query_incr::__rust_end_short_backtrace
  46:     0x753a22b78ff9 - rustc_mir_transform[17ed6911bc11e7a2]::mir_const
  47:     0x753a22b78caf - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::mir_const::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>
  48:     0x753a22600eae - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::VecCache<rustc_span[12522247a56ca943]::def_id::LocalDefId, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  49:     0x753a225ff64e - rustc_query_impl[8bf19dcd17598194]::query_impl::mir_const::get_query_incr::__rust_end_short_backtrace
  50:     0x753a225fd2d9 - rustc_middle[bf205a123b303152]::query::plumbing::query_get_at::<rustc_query_system[66463ee761594c26]::query::caches::VecCache<rustc_span[12522247a56ca943]::def_id::LocalDefId, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>>
  51:     0x753a22b6cf41 - rustc_mir_transform[17ed6911bc11e7a2]::mir_const_qualif
  52:     0x753a22b6ceef - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::mir_const_qualif::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 4usize]>>
  53:     0x753a22b6b971 - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefIdCache<rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 4usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  54:     0x753a22b6b32e - rustc_query_impl[8bf19dcd17598194]::query_impl::mir_const_qualif::get_query_incr::__rust_end_short_backtrace
  55:     0x753a22b6c580 - rustc_middle[bf205a123b303152]::query::plumbing::query_get_at::<rustc_query_system[66463ee761594c26]::query::caches::DefIdCache<rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 4usize]>>>
  56:     0x753a1fe4a963 - rustc_mir_transform[17ed6911bc11e7a2]::mir_promoted
  57:     0x753a2272e4da - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::mir_promoted::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 16usize]>>
  58:     0x753a228c3b9c - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::VecCache<rustc_span[12522247a56ca943]::def_id::LocalDefId, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  59:     0x753a228c31f8 - rustc_query_impl[8bf19dcd17598194]::query_impl::mir_promoted::get_query_incr::__rust_end_short_backtrace
  60:     0x753a225fbb90 - rustc_borrowck[42832600642c4f5b]::mir_borrowck
  61:     0x753a225fbad7 - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>
  62:     0x753a22600eae - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::VecCache<rustc_span[12522247a56ca943]::def_id::LocalDefId, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  63:     0x753a228b952e - rustc_query_impl[8bf19dcd17598194]::query_impl::mir_borrowck::get_query_incr::__rust_end_short_backtrace
  64:     0x753a22b742eb - rustc_mir_transform[17ed6911bc11e7a2]::mir_drops_elaborated_and_const_checked
  65:     0x753a22b739e1 - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>
  66:     0x753a22600eae - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::VecCache<rustc_span[12522247a56ca943]::def_id::LocalDefId, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  67:     0x753a228b99f1 - rustc_query_impl[8bf19dcd17598194]::query_impl::mir_drops_elaborated_and_const_checked::get_query_incr::__rust_end_short_backtrace
  68:     0x753a225fd2d9 - rustc_middle[bf205a123b303152]::query::plumbing::query_get_at::<rustc_query_system[66463ee761594c26]::query::caches::VecCache<rustc_span[12522247a56ca943]::def_id::LocalDefId, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>>
  69:     0x753a22b727ac - rustc_mir_transform[17ed6911bc11e7a2]::mir_for_ctfe
  70:     0x753a22b7271b - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::mir_for_ctfe::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>
  71:     0x753a225d8c22 - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefIdCache<rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  72:     0x753a225d5e25 - rustc_query_impl[8bf19dcd17598194]::query_impl::mir_for_ctfe::get_query_incr::__rust_end_short_backtrace
  73:     0x753a22f9484a - <rustc_const_eval[c85629a20f55f78f]::interpret::eval_context::InterpCx<rustc_const_eval[c85629a20f55f78f]::const_eval::machine::CompileTimeInterpreter>>::load_mir
  74:     0x753a22f96656 - rustc_const_eval[c85629a20f55f78f]::const_eval::eval_queries::eval_to_allocation_raw_provider
  75:     0x753a22f963c0 - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 24usize]>>
  76:     0x753a22f96381 - <rustc_query_impl[8bf19dcd17598194]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2} as core[12243c8320863e2a]::ops::function::FnOnce<(rustc_middle[bf205a123b303152]::ty::context::TyCtxt, rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>)>>::call_once
  77:     0x753a22f90f7b - <rustc_query_system[66463ee761594c26]::query::plumbing::execute_job_incr<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt>::{closure#2}::{closure#2} as core[12243c8320863e2a]::ops::function::FnOnce<((rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 24usize]>>, false, false, false>), rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>)>>::call_once
  78:     0x753a22f72e38 - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  79:     0x753a22f725a0 - rustc_query_impl[8bf19dcd17598194]::query_impl::eval_to_allocation_raw::get_query_incr::__rust_end_short_backtrace
  80:     0x753a22f92b54 - rustc_middle[bf205a123b303152]::query::plumbing::query_get_at::<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 24usize]>>>
  81:     0x753a22f70521 - rustc_const_eval[c85629a20f55f78f]::const_eval::valtrees::eval_to_valtree
  82:     0x753a22f704a2 - <rustc_const_eval[c85629a20f55f78f]::provide::{closure#0} as core[12243c8320863e2a]::ops::function::FnOnce<(rustc_middle[bf205a123b303152]::ty::context::TyCtxt, rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>)>>::call_once
  83:     0x753a22f70476 - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::eval_to_valtree::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 24usize]>>
  84:     0x753a22f7042f - <rustc_query_impl[8bf19dcd17598194]::query_impl::eval_to_valtree::dynamic_query::{closure#2} as core[12243c8320863e2a]::ops::function::FnOnce<(rustc_middle[bf205a123b303152]::ty::context::TyCtxt, rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>)>>::call_once
  85:     0x753a22f90f7b - <rustc_query_system[66463ee761594c26]::query::plumbing::execute_job_incr<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt>::{closure#2}::{closure#2} as core[12243c8320863e2a]::ops::function::FnOnce<((rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 24usize]>>, false, false, false>), rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>)>>::call_once
  86:     0x753a22f72e38 - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  87:     0x753a2336045c - rustc_query_impl[8bf19dcd17598194]::query_impl::eval_to_valtree::get_query_incr::__rust_end_short_backtrace
  88:     0x753a2278769e - rustc_middle[bf205a123b303152]::query::plumbing::query_get_at::<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<rustc_middle[bf205a123b303152]::ty::ParamEnvAnd<rustc_middle[bf205a123b303152]::mir::interpret::GlobalId>, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 24usize]>>>
  89:     0x753a22788a60 - <rustc_middle[bf205a123b303152]::ty::context::TyCtxt>::const_eval_global_id_for_typeck
  90:     0x753a22cc4c51 - <rustc_middle[bf205a123b303152]::ty::context::TyCtxt>::const_eval_resolve_for_typeck
  91:     0x753a22cc49d6 - <rustc_middle[bf205a123b303152]::ty::consts::Const>::eval
  92:     0x753a22cc4836 - <rustc_trait_selection[2dd905f95f64e3d3]::traits::normalize_param_env_or_error::{closure#0}::ConstNormalizer as rustc_type_ir[8f4fa3cf14dc5e5a]::fold::TypeFolder<rustc_middle[bf205a123b303152]::ty::context::TyCtxt>>::fold_const
  93:     0x753a224d42f1 - <&rustc_middle[bf205a123b303152]::ty::list::List<rustc_middle[bf205a123b303152]::ty::generic_args::GenericArg> as rustc_type_ir[8f4fa3cf14dc5e5a]::fold::TypeFoldable<rustc_middle[bf205a123b303152]::ty::context::TyCtxt>>::try_fold_with::<rustc_trait_selection[2dd905f95f64e3d3]::traits::normalize_param_env_or_error::{closure#0}::ConstNormalizer>
  94:     0x753a224d4d06 - <rustc_middle[bf205a123b303152]::ty::Ty as rustc_type_ir[8f4fa3cf14dc5e5a]::fold::TypeSuperFoldable<rustc_middle[bf205a123b303152]::ty::context::TyCtxt>>::try_super_fold_with::<rustc_trait_selection[2dd905f95f64e3d3]::traits::normalize_param_env_or_error::{closure#0}::ConstNormalizer>
  95:     0x753a1fc0371f - rustc_trait_selection[2dd905f95f64e3d3]::traits::normalize_param_env_or_error
  96:     0x753a225e21b4 - rustc_ty_utils[70cf8b048b20fcef]::ty::param_env
  97:     0x753a225e1de5 - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::param_env::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>
  98:     0x753a225d8c22 - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefIdCache<rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
  99:     0x753a225d8287 - rustc_query_impl[8bf19dcd17598194]::query_impl::param_env::get_query_incr::__rust_end_short_backtrace
 100:     0x753a22b078d6 - rustc_middle[bf205a123b303152]::query::plumbing::query_get_at::<rustc_query_system[66463ee761594c26]::query::caches::DefIdCache<rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 8usize]>>>
 101:     0x753a22b2c6f7 - rustc_hir_analysis[453de524d8357e9f]::check::wfcheck::check_trait
 102:     0x753a22b1b7a9 - rustc_hir_analysis[453de524d8357e9f]::check::wfcheck::check_well_formed
 103:     0x753a22b19f75 - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::check_well_formed::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 1usize]>>
 104:     0x753a228b5a64 - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::VecCache<rustc_hir[c2328f352bfcf2b3]::hir_id::OwnerId, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
 105:     0x753a228b5577 - rustc_query_impl[8bf19dcd17598194]::query_impl::check_well_formed::get_query_incr::__rust_end_short_backtrace
 106:     0x753a22b173ba - rustc_hir_analysis[453de524d8357e9f]::check::wfcheck::check_mod_type_wf
 107:     0x753a22b171e1 - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::check_mod_type_wf::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 1usize]>>
 108:     0x753a22ebf28d - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::DefaultCache<rustc_span[12522247a56ca943]::def_id::LocalModDefId, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
 109:     0x753a22ebfefe - rustc_query_impl[8bf19dcd17598194]::query_impl::check_mod_type_wf::get_query_incr::__rust_end_short_backtrace
 110:     0x753a225f8319 - rustc_hir_analysis[453de524d8357e9f]::check_crate
 111:     0x753a228a802a - rustc_interface[32eaad0573225f19]::passes::analysis
 112:     0x753a228a7b99 - rustc_query_impl[8bf19dcd17598194]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[8bf19dcd17598194]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 1usize]>>
 113:     0x753a2336ac62 - rustc_query_system[66463ee761594c26]::query::plumbing::try_execute_query::<rustc_query_impl[8bf19dcd17598194]::DynamicConfig<rustc_query_system[66463ee761594c26]::query::caches::SingleCache<rustc_middle[bf205a123b303152]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[8bf19dcd17598194]::plumbing::QueryCtxt, true>
 114:     0x753a2336a85c - rustc_query_impl[8bf19dcd17598194]::query_impl::analysis::get_query_incr::__rust_end_short_backtrace
 115:     0x753a23071c99 - rustc_interface[32eaad0573225f19]::interface::run_compiler::<core[12243c8320863e2a]::result::Result<(), rustc_span[12522247a56ca943]::ErrorGuaranteed>, rustc_driver_impl[e695e332d36d528]::run_compiler::{closure#0}>::{closure#0}
 116:     0x753a2313efa3 - std[7fd525226211ab56]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[32eaad0573225f19]::util::run_in_thread_with_globals<rustc_interface[32eaad0573225f19]::util::run_in_thread_pool_with_globals<rustc_interface[32eaad0573225f19]::interface::run_compiler<core[12243c8320863e2a]::result::Result<(), rustc_span[12522247a56ca943]::ErrorGuaranteed>, rustc_driver_impl[e695e332d36d528]::run_compiler::{closure#0}>::{closure#0}, core[12243c8320863e2a]::result::Result<(), rustc_span[12522247a56ca943]::ErrorGuaranteed>>::{closure#0}, core[12243c8320863e2a]::result::Result<(), rustc_span[12522247a56ca943]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[12243c8320863e2a]::result::Result<(), rustc_span[12522247a56ca943]::ErrorGuaranteed>>
 117:     0x753a2313edd0 - <<std[7fd525226211ab56]::thread::Builder>::spawn_unchecked_<rustc_interface[32eaad0573225f19]::util::run_in_thread_with_globals<rustc_interface[32eaad0573225f19]::util::run_in_thread_pool_with_globals<rustc_interface[32eaad0573225f19]::interface::run_compiler<core[12243c8320863e2a]::result::Result<(), rustc_span[12522247a56ca943]::ErrorGuaranteed>, rustc_driver_impl[e695e332d36d528]::run_compiler::{closure#0}>::{closure#0}, core[12243c8320863e2a]::result::Result<(), rustc_span[12522247a56ca943]::ErrorGuaranteed>>::{closure#0}, core[12243c8320863e2a]::result::Result<(), rustc_span[12522247a56ca943]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[12243c8320863e2a]::result::Result<(), rustc_span[12522247a56ca943]::ErrorGuaranteed>>::{closure#1} as core[12243c8320863e2a]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
 118:     0x753a24792989 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h27cb56cf029c42e6
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/alloc/src/boxed.rs:2015:9
 119:     0x753a24792989 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hde702e0873fc7642
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/alloc/src/boxed.rs:2015:9
 120:     0x753a24792989 - std::sys::pal::unix::thread::Thread::new::thread_start::h4cd71e4fc50a3acb
                               at /rustc/548e14b43963882fb758deb89e8258d9b8c2fc2a/library/std/src/sys/pal/unix/thread.rs:108:17
 121:     0x753a2453255a - <unknown>
 122:     0x753a245afa3c - <unknown>
 123:                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 1.79.0-nightly (548e14b43 2024-03-24) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z incremental-verify-ich=yes -C incremental=[REDACTED] -C debuginfo=2

query stack during panic:
#0 [diagnostic_hir_wf_check] performing HIR wf-checking for predicate `Binder { value: ObjectSafe(DefId(0:3 ~ mvce[6cbd]::Traitor)), bound_vars: [] }` at item `Ty(DefId(0:5 ~ mvce[6cbd]::Traitor::{constant#0}))`
#1 [typeck] type-checking `Traitor::{constant#0}`
#2 [check_match] match-checking `Traitor::{constant#0}`
#3 [mir_built] building MIR for `Traitor::{constant#0}`
#4 [mir_const] preparing `Traitor::{constant#0}` for borrow checking
#5 [mir_const_qualif] const checking `Traitor::{constant#0}`
#6 [mir_promoted] promoting constants in MIR for `Traitor::{constant#0}`
#7 [mir_borrowck] borrow-checking `Traitor::{constant#0}`
#8 [mir_drops_elaborated_and_const_checked] elaborating drops for `Traitor::{constant#0}`
#9 [mir_for_ctfe] caching mir of `Traitor::{constant#0}` for CTFE
#10 [eval_to_allocation_raw] const-evaluating + checking `Traitor::{constant#0}`
#11 [eval_to_valtree] evaluating type-level constant
#12 [param_env] computing normalized predicates of `Traitor`
#13 [check_well_formed] checking that `Traitor` is well-formed
#14 [check_mod_type_wf] checking that types are well-formed in top-level module
#15 [analysis] running analysis passes on this crate
end of query stack
error[E0038]: the trait `Traitor` cannot be made into an object
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:21:18
   |
21 | trait N<const N: Traitor<2> = 12> {
   |                  ^^^^^^^^^^ `Traitor` cannot be made into an object
   |
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:11:8
   |
10 | trait Traitor<const N: N<2> = 1, const N: N<2> = N> {
   |       ------- this trait cannot be made into an object...
11 |     fn N(&N) -> N<2> {
   |        ^ ...because associated function `N` has no `self` parameter
help: consider turning `N` into a method by giving it a `&self` argument
   |
11 |     fn N(&self, &N) -> N<2> {
   |          ++++++
help: alternatively, consider constraining `N` so it does not apply to trait objects
   |
11 |     fn N(&N) -> N<2> where Self: Sized {
   |                      +++++++++++++++++

error[E0038]: the trait `Traitor` cannot be made into an object
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:21:9
   |
21 | trait N<const N: Traitor<2> = 12> {
   |         ^^^^^^^^^^^^^^^^^^^^^^^^ `Traitor` cannot be made into an object
   |
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:11:8
   |
10 | trait Traitor<const N: N<2> = 1, const N: N<2> = N> {
   |       ------- this trait cannot be made into an object...
11 |     fn N(&N) -> N<2> {
   |        ^ ...because associated function `N` has no `self` parameter
help: consider turning `N` into a method by giving it a `&self` argument
   |
11 |     fn N(&self, &N) -> N<2> {
   |          ++++++
help: alternatively, consider constraining `N` so it does not apply to trait objects
   |
11 |     fn N(&N) -> N<2> where Self: Sized {
   |                      +++++++++++++++++

error: `(dyn Traitor<2, {const error}> + 'static)` is forbidden as the type of a const generic parameter
  --> /tmp/icemaker_global_tempdir.O3cw26BoyBrc/rustc_testrunner_tmpdir_reporting.cQ7GAAPG59qe/mvce.rs:21:18
   |
21 | trait N<const N: Traitor<2> = 12> {
   |                  ^^^^^^^^^^
   |
   = note: the only supported types are integers, `bool` and `char`

error: aborting due to 9 previous errors; 6 warnings emitted

Some errors have detailed explanations: E0038, E0391, E0403, E0425, E0601.
For more information about an error, try `rustc --explain E0038`.

[matthiaskrgr]

bisects to #122078

[jieyouxu]

Slightly smaller:

trait Foo<const N: Bar<2>> {
    fn N(_: &N) {
        todo!()
    }
}

trait Bar<const N: Foo<2>> {}