ICE: expected int of size 8, but got size 2

[matthiaskrgr]

auto-reduced (treereduce-rust):

pub struct Blorb<const N: u16>([String; N]);

pub struct Wrap(Blorb<0>);

pub const fn i(_: Wrap) {}

original:

//@ build-pass

pub(crate) const fn f<T, const N: usize>(_: [std::mem::MaybeUninit<T>; N]) {}

pub struct Blubb<T>(*const T);

pub const fn g<T, const N: usize>(_: [Blubb<T>; N]) {}

pub struct Blorb<const N: u16>([String; N]);

pub const fn h(_: Blorb<0>) {}

pub struct Wrap(Blorb<0>);

pub const fn i(_: Wrap) {}

fn main() {}

Version information

rustc 1.83.0-nightly (c4f717650 2024-10-01)
binary: rustc
commit-hash: c4f7176501a7d3c19c230b8c9111b2d39142f83a
commit-date: 2024-10-01
host: x86_64-unknown-linux-gnu
release: 1.83.0-nightly
LLVM version: 19.1.0

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc

Program output

error[E0601]: `main` function not found in crate `mvce`
 --> /tmp/icemaker_global_tempdir.LKr6KsHYtGSy/rustc_testrunner_tmpdir_reporting.3bKrkGKxt953/mvce.rs:5:27
  |
5 | pub const fn i(_: Wrap) {}
  |                           ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.LKr6KsHYtGSy/rustc_testrunner_tmpdir_reporting.3bKrkGKxt953/mvce.rs`

error: the constant `N` is not of type `usize`
 --> /tmp/icemaker_global_tempdir.LKr6KsHYtGSy/rustc_testrunner_tmpdir_reporting.3bKrkGKxt953/mvce.rs:1:32
  |
1 | pub struct Blorb<const N: u16>([String; N]);
  |                                ^^^^^^^^^^^ expected `usize`, found `u16`

error: internal compiler error: compiler/rustc_middle/src/ty/consts/int.rs:263:13: expected int of size 8, but got size 2

thread 'rustc' panicked at compiler/rustc_middle/src/ty/consts/int.rs:263:13:
Box<dyn Any>
stack backtrace:
   0:     0x7047d26daeda - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::had0a4a07d444c243
   1:     0x7047d2e033e6 - core::fmt::write::hfa03780471fd40a1
   2:     0x7047d3fbd491 - std::io::Write::write_fmt::he88bb98b829c33b1
   3:     0x7047d26dad32 - std::sys::backtrace::BacktraceLock::print::h1e8153a6bf47e7a5
   4:     0x7047d26dd251 - std::panicking::default_hook::{{closure}}::h2d7a6dde612f1b16
   5:     0x7047d26dd084 - std::panicking::default_hook::ha6ce9de3458bcdda
   6:     0x7047d17a486f - std[c1d7bd3f58de7430]::panicking::update_hook::<alloc[29d5ad3c4a91d383]::boxed::Box<rustc_driver_impl[b3d9015aed309aa5]::install_ice_hook::{closure#0}>>::{closure#0}
   7:     0x7047d26dd968 - std::panicking::rust_panic_with_hook::haf1d2e00d64b82f1
   8:     0x7047d17de321 - std[c1d7bd3f58de7430]::panicking::begin_panic::<rustc_errors[a2cc27f529684419]::ExplicitBug>::{closure#0}
   9:     0x7047d17d13c6 - std[c1d7bd3f58de7430]::sys::backtrace::__rust_end_short_backtrace::<std[c1d7bd3f58de7430]::panicking::begin_panic<rustc_errors[a2cc27f529684419]::ExplicitBug>::{closure#0}, !>
  10:     0x7047d17ccad9 - std[c1d7bd3f58de7430]::panicking::begin_panic::<rustc_errors[a2cc27f529684419]::ExplicitBug>
  11:     0x7047d17e7bb1 - <rustc_errors[a2cc27f529684419]::diagnostic::BugAbort as rustc_errors[a2cc27f529684419]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  12:     0x7047d1e0ba54 - rustc_middle[99056c3c142edfd1]::util::bug::opt_span_bug_fmt::<rustc_span[fbdd09955dfcae25]::span_encoding::Span>::{closure#0}
  13:     0x7047d1df17ca - rustc_middle[99056c3c142edfd1]::ty::context::tls::with_opt::<rustc_middle[99056c3c142edfd1]::util::bug::opt_span_bug_fmt<rustc_span[fbdd09955dfcae25]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  14:     0x7047d1df165b - rustc_middle[99056c3c142edfd1]::ty::context::tls::with_context_opt::<rustc_middle[99056c3c142edfd1]::ty::context::tls::with_opt<rustc_middle[99056c3c142edfd1]::util::bug::opt_span_bug_fmt<rustc_span[fbdd09955dfcae25]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  15:     0x7047cf3cce60 - rustc_middle[99056c3c142edfd1]::util::bug::bug_fmt
  16:     0x7047cf94826a - rustc_middle[99056c3c142edfd1]::ty::util::needs_drop_components_with_async
  17:     0x7047d31ebeb7 - rustc_ty_utils[7eb78ab09d37383f]::needs_drop::needs_drop_raw
  18:     0x7047d31eba8f - rustc_query_impl[a128c9efc091a24e]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a128c9efc091a24e]::query_impl::needs_drop_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[99056c3c142edfd1]::query::erase::Erased<[u8; 1usize]>>
  19:     0x7047d31eaebf - rustc_query_system[a5b010e784c9cc4f]::query::plumbing::try_execute_query::<rustc_query_impl[a128c9efc091a24e]::DynamicConfig<rustc_query_system[a5b010e784c9cc4f]::query::caches::DefaultCache<rustc_middle[99056c3c142edfd1]::ty::ParamEnvAnd<rustc_middle[99056c3c142edfd1]::ty::Ty>, rustc_middle[99056c3c142edfd1]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[a128c9efc091a24e]::plumbing::QueryCtxt, false>
  20:     0x7047d31eab0e - rustc_query_impl[a128c9efc091a24e]::query_impl::needs_drop_raw::get_query_non_incr::__rust_end_short_backtrace
  21:     0x7047d37a04a2 - rustc_mir_build[624742ab29f03d50]::build::mir_build
  22:     0x7047d2e04f06 - rustc_mir_transform[72b720a2bb6a9bbb]::mir_built
  23:     0x7047d2e04ec9 - rustc_query_impl[a128c9efc091a24e]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a128c9efc091a24e]::query_impl::mir_built::dynamic_query::{closure#2}::{closure#0}, rustc_middle[99056c3c142edfd1]::query::erase::Erased<[u8; 8usize]>>
  24:     0x7047d31a94ba - rustc_query_system[a5b010e784c9cc4f]::query::plumbing::try_execute_query::<rustc_query_impl[a128c9efc091a24e]::DynamicConfig<rustc_query_system[a5b010e784c9cc4f]::query::caches::VecCache<rustc_span[fbdd09955dfcae25]::def_id::LocalDefId, rustc_middle[99056c3c142edfd1]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[a128c9efc091a24e]::plumbing::QueryCtxt, false>
  25:     0x7047d31a8fcd - rustc_query_impl[a128c9efc091a24e]::query_impl::mir_built::get_query_non_incr::__rust_end_short_backtrace
  26:     0x7047cf4dc4e3 - rustc_mir_build[624742ab29f03d50]::check_unsafety::check_unsafety
  27:     0x7047d3633fe7 - rustc_query_impl[a128c9efc091a24e]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a128c9efc091a24e]::query_impl::check_unsafety::dynamic_query::{closure#2}::{closure#0}, rustc_middle[99056c3c142edfd1]::query::erase::Erased<[u8; 0usize]>>
  28:     0x7047d3634298 - rustc_query_system[a5b010e784c9cc4f]::query::plumbing::try_execute_query::<rustc_query_impl[a128c9efc091a24e]::DynamicConfig<rustc_query_system[a5b010e784c9cc4f]::query::caches::VecCache<rustc_span[fbdd09955dfcae25]::def_id::LocalDefId, rustc_middle[99056c3c142edfd1]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[a128c9efc091a24e]::plumbing::QueryCtxt, false>
  29:     0x7047d3633f17 - rustc_query_impl[a128c9efc091a24e]::query_impl::check_unsafety::get_query_non_incr::__rust_end_short_backtrace
  30:     0x7047d31a2d47 - rustc_interface[89dec4b9d675c708]::passes::run_required_analyses
  31:     0x7047d3b0f51e - rustc_interface[89dec4b9d675c708]::passes::analysis
  32:     0x7047d3b0f4f1 - rustc_query_impl[a128c9efc091a24e]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[a128c9efc091a24e]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[99056c3c142edfd1]::query::erase::Erased<[u8; 1usize]>>
  33:     0x7047d3c9252e - rustc_query_system[a5b010e784c9cc4f]::query::plumbing::try_execute_query::<rustc_query_impl[a128c9efc091a24e]::DynamicConfig<rustc_query_system[a5b010e784c9cc4f]::query::caches::SingleCache<rustc_middle[99056c3c142edfd1]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[a128c9efc091a24e]::plumbing::QueryCtxt, false>
  34:     0x7047d3c9220f - rustc_query_impl[a128c9efc091a24e]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  35:     0x7047d3b1f55e - rustc_interface[89dec4b9d675c708]::interface::run_compiler::<core[d0cd706d8d014919]::result::Result<(), rustc_span[fbdd09955dfcae25]::ErrorGuaranteed>, rustc_driver_impl[b3d9015aed309aa5]::run_compiler::{closure#0}>::{closure#1}
  36:     0x7047d3bea350 - std[c1d7bd3f58de7430]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[89dec4b9d675c708]::util::run_in_thread_with_globals<rustc_interface[89dec4b9d675c708]::util::run_in_thread_pool_with_globals<rustc_interface[89dec4b9d675c708]::interface::run_compiler<core[d0cd706d8d014919]::result::Result<(), rustc_span[fbdd09955dfcae25]::ErrorGuaranteed>, rustc_driver_impl[b3d9015aed309aa5]::run_compiler::{closure#0}>::{closure#1}, core[d0cd706d8d014919]::result::Result<(), rustc_span[fbdd09955dfcae25]::ErrorGuaranteed>>::{closure#0}, core[d0cd706d8d014919]::result::Result<(), rustc_span[fbdd09955dfcae25]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d0cd706d8d014919]::result::Result<(), rustc_span[fbdd09955dfcae25]::ErrorGuaranteed>>
  37:     0x7047d3bea9ba - <<std[c1d7bd3f58de7430]::thread::Builder>::spawn_unchecked_<rustc_interface[89dec4b9d675c708]::util::run_in_thread_with_globals<rustc_interface[89dec4b9d675c708]::util::run_in_thread_pool_with_globals<rustc_interface[89dec4b9d675c708]::interface::run_compiler<core[d0cd706d8d014919]::result::Result<(), rustc_span[fbdd09955dfcae25]::ErrorGuaranteed>, rustc_driver_impl[b3d9015aed309aa5]::run_compiler::{closure#0}>::{closure#1}, core[d0cd706d8d014919]::result::Result<(), rustc_span[fbdd09955dfcae25]::ErrorGuaranteed>>::{closure#0}, core[d0cd706d8d014919]::result::Result<(), rustc_span[fbdd09955dfcae25]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d0cd706d8d014919]::result::Result<(), rustc_span[fbdd09955dfcae25]::ErrorGuaranteed>>::{closure#1} as core[d0cd706d8d014919]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  38:     0x7047d3beadab - std::sys::pal::unix::thread::Thread::new::thread_start::h6a16a471557e53ce
  39:     0x7047d533639d - <unknown>
  40:     0x7047d53bb49c - <unknown>
  41:                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 make sure that you have updated to the latest nightly

note: rustc 1.83.0-nightly (c4f717650 2024-10-01) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [needs_drop_raw] computing whether `Wrap` needs drop
#1 [mir_built] building MIR for `i`
end of query stack
error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0601`.