ICE: `adding a def'n for node-id NodeId(13) and def kind AnonConst but a previous def'n exists: DefKey`

[matthiaskrgr]

auto-reduced (treereduce-rust):

macro_rules! y {
    ( $($matcher:tt)*) => {
        x
    };
}

const _: A<
    {
        y! { test.tou8 }
    },
>;

original:

macro_rules! y {
    ($macro_name:tt $($matcher:tt)*) => {
        x
    };
}

const _: A<{ y!{ test.tou8 } }>;

Version information

rustc 1.84.0-nightly (b27f33a4d 2024-10-19)
binary: rustc
commit-hash: b27f33a4d9c42ee6b5347a75a8a990a883437da9
commit-date: 2024-10-19
host: x86_64-unknown-linux-gnu
release: 1.84.0-nightly
LLVM version: 19.1.1

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

Program output

error: free constant item without body
  --> /tmp/icemaker_global_tempdir.AdIxA8iQnjEG/rustc_testrunner_tmpdir_reporting.XHKTAGkfAHi1/mvce.rs:7:1
   |
7  | / const _: A<
8  | |     {
9  | |         y! { test.tou8 }
10 | |     },
11 | | >;
   | |  ^ help: provide a definition for the constant: `= <expr>;`
   | |__|
   |

error[E0412]: cannot find type `A` in this scope
 --> /tmp/icemaker_global_tempdir.AdIxA8iQnjEG/rustc_testrunner_tmpdir_reporting.XHKTAGkfAHi1/mvce.rs:7:10
  |
7 | const _: A<
  |          ^ not found in this scope

error[E0425]: cannot find value `x` in this scope
 --> /tmp/icemaker_global_tempdir.AdIxA8iQnjEG/rustc_testrunner_tmpdir_reporting.XHKTAGkfAHi1/mvce.rs:3:9
  |
3 |         x
  |         ^ not found in this scope
...
9 |         y! { test.tou8 }
  |         ---------------- in this macro invocation
  |
  = note: this error originates in the macro `y` (in Nightly builds, run with -Z macro-backtrace for more info)
help: you might be missing a const parameter
  |
7 | const _<const x: /* Type */>: A<
  |        +++++++++++++++++++++

thread 'rustc' panicked at compiler/rustc_ast_lowering/src/lib.rs:512:9:
adding a def'n for node-id NodeId(13) and def kind AnonConst but a previous def'n exists: DefKey { parent: Some(DefIndex(4)), disambiguated_data: DisambiguatedDefPathData { data: AnonConst, disambiguator: 0 } }
stack backtrace:
   0:     0x715d9948520a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdac32ff7d08097b3
   1:     0x715d99c03e0a - core::fmt::write::he7b2961891ad0e03
   2:     0x715d9afa8dd1 - std::io::Write::write_fmt::h6fc7483bcf4f9c11
   3:     0x715d99485062 - std::sys::backtrace::BacktraceLock::print::hc7d7319873b6f660
   4:     0x715d99487546 - std::panicking::default_hook::{{closure}}::ha61e3147cba8ee8a
   5:     0x715d99487390 - std::panicking::default_hook::hc4bb3c2728ef613e
   6:     0x715d985067af - std[6fffc856d94a0e6]::panicking::update_hook::<alloc[d3ea509624c99f1]::boxed::Box<rustc_driver_impl[b57619f16e18ebfc]::install_ice_hook::{closure#0}>>::{closure#0}
   7:     0x715d99487c58 - std::panicking::rust_panic_with_hook::ha7c28fcdc2bea7fe
   8:     0x715d99487a2a - std::panicking::begin_panic_handler::{{closure}}::h8bf205dbcfff5ce0
   9:     0x715d994856b9 - std::sys::backtrace::__rust_end_short_backtrace::h2a05a2f71e10a349
  10:     0x715d994876ec - rust_begin_unwind
  11:     0x715d95ee7b00 - core::panicking::panic_fmt::hd3f3c67c8def5639
  12:     0x715d9b81ab7d - <rustc_ast_lowering[7570fa9a18bde2ff]::LoweringContext>::create_def.cold
  13:     0x715d9a25b4e4 - <rustc_ast_lowering[7570fa9a18bde2ff]::LoweringContext>::lower_anon_const_to_anon_const
  14:     0x715d9a25b166 - <rustc_ast_lowering[7570fa9a18bde2ff]::LoweringContext>::lower_anon_const_to_const_arg_direct
  15:     0x715d9a27e0d7 - <rustc_ast_lowering[7570fa9a18bde2ff]::LoweringContext>::lower_qpath
  16:     0x715d9a289c16 - <rustc_ast_lowering[7570fa9a18bde2ff]::LoweringContext>::lower_ty_direct
  17:     0x715d9a249c48 - <rustc_ast_lowering[7570fa9a18bde2ff]::LoweringContext>::lower_item_kind
  18:     0x715d9a25efc5 - <rustc_ast_lowering[7570fa9a18bde2ff]::item::ItemLowerer>::lower_node
  19:     0x715d9a261d41 - rustc_ast_lowering[7570fa9a18bde2ff]::lower_to_hir
  20:     0x715d9ab86960 - rustc_query_impl[78a5845e8abfae96]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[78a5845e8abfae96]::query_impl::hir_crate::dynamic_query::{closure#2}::{closure#0}, rustc_middle[29c9719f087184d3]::query::erase::Erased<[u8; 8usize]>>
  21:     0x715d9ab85879 - rustc_query_system[f09a170c383828e5]::query::plumbing::try_execute_query::<rustc_query_impl[78a5845e8abfae96]::DynamicConfig<rustc_query_system[f09a170c383828e5]::query::caches::SingleCache<rustc_middle[29c9719f087184d3]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[78a5845e8abfae96]::plumbing::QueryCtxt, false>
  22:     0x715d9ab8521e - rustc_query_impl[78a5845e8abfae96]::query_impl::hir_crate::get_query_non_incr::__rust_end_short_backtrace
  23:     0x715d9a05a345 - rustc_query_impl[78a5845e8abfae96]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[78a5845e8abfae96]::query_impl::hir_attrs::dynamic_query::{closure#2}::{closure#0}, rustc_middle[29c9719f087184d3]::query::erase::Erased<[u8; 8usize]>>
  24:     0x715d9a0598e2 - rustc_query_system[f09a170c383828e5]::query::plumbing::try_execute_query::<rustc_query_impl[78a5845e8abfae96]::DynamicConfig<rustc_query_system[f09a170c383828e5]::query::caches::VecCache<rustc_hir[589805fb5f1ad5c3]::hir_id::OwnerId, rustc_middle[29c9719f087184d3]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[78a5845e8abfae96]::plumbing::QueryCtxt, false>
  25:     0x715d9a05964f - rustc_query_impl[78a5845e8abfae96]::query_impl::hir_attrs::get_query_non_incr::__rust_end_short_backtrace
  26:     0x715d99e00410 - <rustc_middle[29c9719f087184d3]::hir::map::Map>::attrs
  27:     0x715d9ab3b241 - rustc_passes[d7be05dacd881f89]::entry::entry_fn
  28:     0x715d9ab3b1d8 - rustc_query_impl[78a5845e8abfae96]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[78a5845e8abfae96]::query_impl::entry_fn::dynamic_query::{closure#2}::{closure#0}, rustc_middle[29c9719f087184d3]::query::erase::Erased<[u8; 12usize]>>
  29:     0x715d9ab3b1b5 - <rustc_query_impl[78a5845e8abfae96]::query_impl::entry_fn::dynamic_query::{closure#2} as core[c4cfdfe838f37049]::ops::function::FnOnce<(rustc_middle[29c9719f087184d3]::ty::context::TyCtxt, ())>>::call_once
  30:     0x715d9ab3ab49 - rustc_query_system[f09a170c383828e5]::query::plumbing::try_execute_query::<rustc_query_impl[78a5845e8abfae96]::DynamicConfig<rustc_query_system[f09a170c383828e5]::query::caches::SingleCache<rustc_middle[29c9719f087184d3]::query::erase::Erased<[u8; 12usize]>>, false, false, false>, rustc_query_impl[78a5845e8abfae96]::plumbing::QueryCtxt, false>
  31:     0x715d9ab3a8e9 - rustc_query_impl[78a5845e8abfae96]::query_impl::entry_fn::get_query_non_incr::__rust_end_short_backtrace
  32:     0x715d9a62b5c6 - rustc_interface[624eb7a003d8889d]::passes::run_required_analyses
  33:     0x715d9ab2c39e - rustc_interface[624eb7a003d8889d]::passes::analysis
  34:     0x715d9ab2c371 - rustc_query_impl[78a5845e8abfae96]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[78a5845e8abfae96]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[29c9719f087184d3]::query::erase::Erased<[u8; 1usize]>>
  35:     0x715d9ab8312e - rustc_query_system[f09a170c383828e5]::query::plumbing::try_execute_query::<rustc_query_impl[78a5845e8abfae96]::DynamicConfig<rustc_query_system[f09a170c383828e5]::query::caches::SingleCache<rustc_middle[29c9719f087184d3]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[78a5845e8abfae96]::plumbing::QueryCtxt, false>
  36:     0x715d9ab82e0f - rustc_query_impl[78a5845e8abfae96]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  37:     0x715d9aa2335e - rustc_interface[624eb7a003d8889d]::interface::run_compiler::<core[c4cfdfe838f37049]::result::Result<(), rustc_span[817e7a822cf0ab0]::ErrorGuaranteed>, rustc_driver_impl[b57619f16e18ebfc]::run_compiler::{closure#0}>::{closure#1}
  38:     0x715d9aab0d94 - std[6fffc856d94a0e6]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[624eb7a003d8889d]::util::run_in_thread_with_globals<rustc_interface[624eb7a003d8889d]::util::run_in_thread_pool_with_globals<rustc_interface[624eb7a003d8889d]::interface::run_compiler<core[c4cfdfe838f37049]::result::Result<(), rustc_span[817e7a822cf0ab0]::ErrorGuaranteed>, rustc_driver_impl[b57619f16e18ebfc]::run_compiler::{closure#0}>::{closure#1}, core[c4cfdfe838f37049]::result::Result<(), rustc_span[817e7a822cf0ab0]::ErrorGuaranteed>>::{closure#0}, core[c4cfdfe838f37049]::result::Result<(), rustc_span[817e7a822cf0ab0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[c4cfdfe838f37049]::result::Result<(), rustc_span[817e7a822cf0ab0]::ErrorGuaranteed>>
  39:     0x715d9aab11a8 - <<std[6fffc856d94a0e6]::thread::Builder>::spawn_unchecked_<rustc_interface[624eb7a003d8889d]::util::run_in_thread_with_globals<rustc_interface[624eb7a003d8889d]::util::run_in_thread_pool_with_globals<rustc_interface[624eb7a003d8889d]::interface::run_compiler<core[c4cfdfe838f37049]::result::Result<(), rustc_span[817e7a822cf0ab0]::ErrorGuaranteed>, rustc_driver_impl[b57619f16e18ebfc]::run_compiler::{closure#0}>::{closure#1}, core[c4cfdfe838f37049]::result::Result<(), rustc_span[817e7a822cf0ab0]::ErrorGuaranteed>>::{closure#0}, core[c4cfdfe838f37049]::result::Result<(), rustc_span[817e7a822cf0ab0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[c4cfdfe838f37049]::result::Result<(), rustc_span[817e7a822cf0ab0]::ErrorGuaranteed>>::{closure#1} as core[c4cfdfe838f37049]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  40:     0x715d9aab1c6b - std::sys::pal::unix::thread::Thread::new::thread_start::h9c90f5bca820af03
  41:     0x715d9c31b39d - <unknown>
  42:     0x715d9c3a049c - <unknown>
  43:                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: rustc 1.84.0-nightly (b27f33a4d 2024-10-19) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [hir_crate] getting the crate HIR
#1 [hir_attrs] getting HIR owner attributes in ``
end of query stack
error: aborting due to 3 previous errors

Some errors have detailed explanations: E0412, E0425.
For more information about an error, try `rustc --explain E0412`.

[matthiaskrgr]

bisects to #125915