ICE: with_negative_coherence & specialization

[ShE3py]

Note: this doesn't requires nightly.

Code

#![feature(with_negative_coherence)]

impl<const N: u8> Copy for [(); N] {}

Meta

rustc --version --verbose:

rustc 1.77.2 (25ef9e3d8 2024-04-09)
binary: rustc
commit-hash: 25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04
commit-date: 2024-04-09
host: x86_64-unknown-linux-gnu
release: 1.77.2
LLVM version: 17.0.6

Error output

Backtrace

thread 'rustc' panicked at compiler/rustc_infer/src/infer/canonical/canonicalizer.rs:340:43:
called `Option::unwrap()` on a `None` value
stack backtrace:
   0:     0x7852c00b3d16 - std::backtrace_rs::backtrace::libunwind::trace::hd6ffdc229294c06f
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
   1:     0x7852c00b3d16 - std::backtrace_rs::backtrace::trace_unsynchronized::h991f79b6e9960513
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7852c00b3d16 - std::sys_common::backtrace::_print_fmt::hf4ebe716f7ccda10
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7852c00b3d16 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h410d4c66be4e37f9
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7852c0106770 - core::fmt::rt::Argument::fmt::he0ff0e0e188c0db5
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/core/src/fmt/rt.rs:142:9
   5:     0x7852c0106770 - core::fmt::write::he40921d4802ce2ac
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/core/src/fmt/mod.rs:1120:17
   6:     0x7852c00a761f - std::io::Write::write_fmt::h5de5a4e7037c9b20
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/io/mod.rs:1846:15
   7:     0x7852c00b3af4 - std::sys_common::backtrace::_print::hd8e2e3f655086663
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7852c00b3af4 - std::sys_common::backtrace::print::h11c067a88e3bdb22
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7852c00b6887 - std::panicking::default_hook::{{closure}}::h8c832ecb03fde8ea
  10:     0x7852c00b65e9 - std::panicking::default_hook::h1633e272b4150cf3
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/panicking.rs:292:9
  11:     0x7852bcda0dac - std[85008a29cc0b7dba]::panicking::update_hook::<alloc[a3006b27d8562c00]::boxed::Box<rustc_driver_impl[7bf504f3f6583165]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7852c00b6fd6 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h4dd5cc3b5605ae1a
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/alloc/src/boxed.rs:2029:9
  13:     0x7852c00b6fd6 - std::panicking::rust_panic_with_hook::hb164d19c0c1e71d4
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/panicking.rs:785:13
  14:     0x7852c00b6ce9 - std::panicking::begin_panic_handler::{{closure}}::h0369088c533c20e9
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/panicking.rs:651:13
  15:     0x7852c00b4216 - std::sys_common::backtrace::__rust_end_short_backtrace::hc11d910daf35ac2e
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x7852c00b6a74 - rust_begin_unwind
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/panicking.rs:647:5
  17:     0x7852c0102e75 - core::panicking::panic_fmt::ha6effc2775a0749c
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/core/src/panicking.rs:72:14
  18:     0x7852c0102f33 - core::panicking::panic::h44790a89027c670f
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/core/src/panicking.rs:144:5
  19:     0x7852c0102bb6 - core::option::unwrap_failed::hcb3a256a9f1ca882
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/core/src/option.rs:1978:5
  20:     0x7852bb3f2e21 - <rustc_infer[a5dc95fd7312ffcc]::infer::canonical::canonicalizer::Canonicalizer as rustc_type_ir[ebd1d6103875bdf0]::fold::TypeFolder<rustc_middle[a985f8abd286e753]::ty::context::TyCtxt>>::fold_ty
  21:     0x7852be1887d2 - <&rustc_middle[a985f8abd286e753]::ty::list::List<rustc_middle[a985f8abd286e753]::ty::generic_args::GenericArg> as rustc_type_ir[ebd1d6103875bdf0]::fold::TypeFoldable<rustc_middle[a985f8abd286e753]::ty::context::TyCtxt>>::try_fold_with::<rustc_infer[a5dc95fd7312ffcc]::infer::canonical::canonicalizer::Canonicalizer>
  22:     0x7852bd005d47 - <rustc_middle[a985f8abd286e753]::ty::Clause as rustc_type_ir[ebd1d6103875bdf0]::fold::TypeFoldable<rustc_middle[a985f8abd286e753]::ty::context::TyCtxt>>::try_fold_with::<rustc_infer[a5dc95fd7312ffcc]::infer::canonical::canonicalizer::Canonicalizer>
  23:     0x7852bd028bf4 - <<rustc_infer[a5dc95fd7312ffcc]::infer::InferCtxt>::canonicalize_query<(rustc_middle[a985f8abd286e753]::ty::Ty, rustc_middle[a985f8abd286e753]::ty::Ty)>::{closure#0} as core[7fef78d3beba6ff5]::ops::function::FnOnce<(rustc_middle[a985f8abd286e753]::ty::context::TyCtxt, rustc_middle[a985f8abd286e753]::ty::ParamEnv, &mut rustc_middle[a985f8abd286e753]::infer::canonical::OriginalQueryValues)>>::call_once
  24:     0x7852be49f38c - <rustc_middle[a985f8abd286e753]::infer::canonical::CanonicalParamEnvCache>::get_or_insert
  25:     0x7852bd0300d8 - <rustc_infer[a5dc95fd7312ffcc]::infer::InferCtxt>::canonicalize_query::<(rustc_middle[a985f8abd286e753]::ty::Ty, rustc_middle[a985f8abd286e753]::ty::Ty)>
  26:     0x7852be48b676 - <rustc_infer[a5dc95fd7312ffcc]::infer::InferCtxt>::super_combine_consts::<rustc_infer[a5dc95fd7312ffcc]::infer::relate::equate::Equate>
  27:     0x7852be0a1527 - <rustc_infer[a5dc95fd7312ffcc]::infer::InferCtxt>::super_combine_tys::<rustc_infer[a5dc95fd7312ffcc]::infer::relate::equate::Equate>
  28:     0x7852be09e716 - <rustc_infer[a5dc95fd7312ffcc]::infer::relate::equate::Equate as rustc_middle[a985f8abd286e753]::ty::relate::TypeRelation>::tys
  29:     0x7852be38eef3 - <rustc_infer[a5dc95fd7312ffcc]::infer::at::At>::eq::<rustc_middle[a985f8abd286e753]::ty::sty::TraitRef>
  30:     0x7852be38ea2b - rustc_trait_selection[ebedcddbc396e501]::traits::coherence::equate_impl_headers
  31:     0x7852bd7e22a5 - rustc_trait_selection[ebedcddbc396e501]::traits::coherence::impl_intersection_has_negative_obligation
  32:     0x7852be3902fa - rustc_trait_selection[ebedcddbc396e501]::traits::coherence::overlap
  33:     0x7852be765561 - <rustc_middle[a985f8abd286e753]::traits::specialization_graph::Children as rustc_trait_selection[ebedcddbc396e501]::traits::specialize::specialization_graph::ChildrenExt>::insert
  34:     0x7852be764ae7 - <rustc_middle[a985f8abd286e753]::traits::specialization_graph::Graph as rustc_trait_selection[ebedcddbc396e501]::traits::specialize::specialization_graph::GraphExt>::insert
  35:     0x7852bea7cd80 - rustc_trait_selection[ebedcddbc396e501]::traits::specialize::specialization_graph_provider
  36:     0x7852bea7c85b - rustc_query_impl[616430243197e8f4]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[616430243197e8f4]::query_impl::specialization_graph_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[a985f8abd286e753]::query::erase::Erased<[u8; 8usize]>>
  37:     0x7852be064b0d - rustc_query_system[d592f7b82322148b]::query::plumbing::try_execute_query::<rustc_query_impl[616430243197e8f4]::DynamicConfig<rustc_query_system[d592f7b82322148b]::query::caches::DefIdCache<rustc_middle[a985f8abd286e753]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[616430243197e8f4]::plumbing::QueryCtxt, false>
  38:     0x7852be5492b2 - rustc_query_impl[616430243197e8f4]::query_impl::specialization_graph_of::get_query_non_incr::__rust_end_short_backtrace
  39:     0x7852be549546 - rustc_hir_analysis[13775d5f02570a3]::coherence::coherent_trait
  40:     0x7852be54944b - rustc_query_impl[616430243197e8f4]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[616430243197e8f4]::query_impl::coherent_trait::dynamic_query::{closure#2}::{closure#0}, rustc_middle[a985f8abd286e753]::query::erase::Erased<[u8; 1usize]>>
  41:     0x7852be1c9400 - rustc_query_system[d592f7b82322148b]::query::plumbing::try_execute_query::<rustc_query_impl[616430243197e8f4]::DynamicConfig<rustc_query_system[d592f7b82322148b]::query::caches::DefIdCache<rustc_middle[a985f8abd286e753]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[616430243197e8f4]::plumbing::QueryCtxt, false>
  42:     0x7852be2e8b0d - rustc_query_impl[616430243197e8f4]::query_impl::coherent_trait::get_query_non_incr::__rust_end_short_backtrace
  43:     0x7852be2e90c3 - rustc_hir_analysis[13775d5f02570a3]::check_crate
  44:     0x7852be9a3266 - rustc_interface[80a0b631737fb765]::passes::analysis
  45:     0x7852be9a2c5f - rustc_query_impl[616430243197e8f4]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[616430243197e8f4]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[a985f8abd286e753]::query::erase::Erased<[u8; 1usize]>>
  46:     0x7852be9fdf82 - rustc_query_system[d592f7b82322148b]::query::plumbing::try_execute_query::<rustc_query_impl[616430243197e8f4]::DynamicConfig<rustc_query_system[d592f7b82322148b]::query::caches::SingleCache<rustc_middle[a985f8abd286e753]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[616430243197e8f4]::plumbing::QueryCtxt, false>
  47:     0x7852be9fddc7 - rustc_query_impl[616430243197e8f4]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  48:     0x7852bece620b - rustc_interface[80a0b631737fb765]::interface::run_compiler::<core[7fef78d3beba6ff5]::result::Result<(), rustc_span[865b327b21456c24]::ErrorGuaranteed>, rustc_driver_impl[7bf504f3f6583165]::run_compiler::{closure#0}>::{closure#0}
  49:     0x7852bef33df1 - std[85008a29cc0b7dba]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[80a0b631737fb765]::util::run_in_thread_with_globals<rustc_interface[80a0b631737fb765]::interface::run_compiler<core[7fef78d3beba6ff5]::result::Result<(), rustc_span[865b327b21456c24]::ErrorGuaranteed>, rustc_driver_impl[7bf504f3f6583165]::run_compiler::{closure#0}>::{closure#0}, core[7fef78d3beba6ff5]::result::Result<(), rustc_span[865b327b21456c24]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[7fef78d3beba6ff5]::result::Result<(), rustc_span[865b327b21456c24]::ErrorGuaranteed>>
  50:     0x7852bef33c4f - <<std[85008a29cc0b7dba]::thread::Builder>::spawn_unchecked_<rustc_interface[80a0b631737fb765]::util::run_in_thread_with_globals<rustc_interface[80a0b631737fb765]::interface::run_compiler<core[7fef78d3beba6ff5]::result::Result<(), rustc_span[865b327b21456c24]::ErrorGuaranteed>, rustc_driver_impl[7bf504f3f6583165]::run_compiler::{closure#0}>::{closure#0}, core[7fef78d3beba6ff5]::result::Result<(), rustc_span[865b327b21456c24]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[7fef78d3beba6ff5]::result::Result<(), rustc_span[865b327b21456c24]::ErrorGuaranteed>>::{closure#1} as core[7fef78d3beba6ff5]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  51:     0x7852c00c0675 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6b630278c760b971
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/alloc/src/boxed.rs:2015:9
  52:     0x7852c00c0675 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h70462b441b6c0e1f
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/alloc/src/boxed.rs:2015:9
  53:     0x7852c00c0675 - std::sys::pal::unix::thread::Thread::new::thread_start::h3631815ad38387d6
                               at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/sys/pal/unix/thread.rs:108:17
  54:     0x7852bfe7b55a - <unknown>
  55:     0x7852bfef8a5c - <unknown>
  56:                0x0 - <unknown>

query stack during panic:
#0 [specialization_graph_of] building specialization graph of trait `core::marker::Copy`
#1 [coherent_trait] coherence checking all impls of trait `core::marker::Copy`
#2 [analysis] running analysis passes on this crate
end of query stack

---

@rustbot label +F-with_negative_coherence +A-coherence +A-specialization

[ShE3py]

Ah, duplicate of #119381.