error[E0658]: trait aliases are experimental
 --> /tmp/icemaker_global_tempdir.BoZUjSTNMTmD/rustc_testrunner_tmpdir_reporting.QHjKfKkEvmKI/mvce.rs:2:1
  |
2 | trait Foo = PartialEq<i32> + Send;
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #41517 <https://github.com/rust-lang/rust/issues/41517> for more information
  = help: add `#![feature(trait_alias)]` to the crate attributes to enable
  = note: this compiler was built on 2024-07-01; consider upgrading it if it is out of date

error[E0658]: the `#[marker]` attribute is an experimental feature
 --> /tmp/icemaker_global_tempdir.BoZUjSTNMTmD/rustc_testrunner_tmpdir_reporting.QHjKfKkEvmKI/mvce.rs:1:1
  |
1 | #[marker]
  | ^^^^^^^^^
  |
  = note: see issue #29864 <https://github.com/rust-lang/rust/issues/29864> for more information
  = help: add `#![feature(marker_trait_attr)]` to the crate attributes to enable
  = note: this compiler was built on 2024-07-01; consider upgrading it if it is out of date

error[E0601]: `main` function not found in crate `mvce`
 --> /tmp/icemaker_global_tempdir.BoZUjSTNMTmD/rustc_testrunner_tmpdir_reporting.QHjKfKkEvmKI/mvce.rs:2:35
  |
2 | trait Foo = PartialEq<i32> + Send;
  |                                   ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.BoZUjSTNMTmD/rustc_testrunner_tmpdir_reporting.QHjKfKkEvmKI/mvce.rs`

error: attribute should be applied to a trait
 --> /tmp/icemaker_global_tempdir.BoZUjSTNMTmD/rustc_testrunner_tmpdir_reporting.QHjKfKkEvmKI/mvce.rs:1:1
  |
1 | #[marker]
  | ^^^^^^^^^
2 | trait Foo = PartialEq<i32> + Send;
  | ---------------------------------- not a trait

error: internal compiler error: compiler/rustc_ty_utils/src/assoc.rs:80:14: associated_item_def_ids: not impl or trait
 --> /tmp/icemaker_global_tempdir.BoZUjSTNMTmD/rustc_testrunner_tmpdir_reporting.QHjKfKkEvmKI/mvce.rs:2:1
  |
2 | trait Foo = PartialEq<i32> + Send;
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

thread 'rustc' panicked at compiler/rustc_ty_utils/src/assoc.rs:80:14:
Box<dyn Any>
stack backtrace:
   0:     0x7d318d9723d5 - std::backtrace_rs::backtrace::libunwind::trace::hb712d1033083f19f
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
   1:     0x7d318d9723d5 - std::backtrace_rs::backtrace::trace_unsynchronized::hcd45231d964c5f87
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7d318d9723d5 - std::sys::backtrace::_print_fmt::ha326387fd7186899
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/std/src/sys/backtrace.rs:68:5
   3:     0x7d318d9723d5 - <std::sys::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb0a71f126ecc5f94
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/std/src/sys/backtrace.rs:44:22
   4:     0x7d318d9c1adb - core::fmt::rt::Argument::fmt::hcb80cd58ae514c57
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/core/src/fmt/rt.rs:173:76
   5:     0x7d318d9c1adb - core::fmt::write::h24e86a79a1d9fd27
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/core/src/fmt/mod.rs:1174:21
   6:     0x7d318d966f7f - std::io::Write::write_fmt::h6f24f5499b917dd0
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/std/src/io/mod.rs:1835:15
   7:     0x7d318d9721ae - std::sys::backtrace::_print::hab3688cd990b4da1
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/std/src/sys/backtrace.rs:47:5
   8:     0x7d318d9721ae - std::sys::backtrace::print::hd7ca970b8f6f0d2a
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/std/src/sys/backtrace.rs:34:9
   9:     0x7d318d974af9 - std::panicking::default_hook::{{closure}}::hbcefa19962d38670
  10:     0x7d318d97489c - std::panicking::default_hook::ha30d3ad58a1508fe
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/std/src/panicking.rs:292:9
  11:     0x7d3189df21d9 - std[a32dded7438b921f]::panicking::update_hook::<alloc[e66b80bbeb26e33f]::boxed::Box<rustc_driver_impl[caf9fb610f137d76]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7d318d97541f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h62bf5bbfe5d978e7
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/alloc/src/boxed.rs:2078:9
  13:     0x7d318d97541f - std::panicking::rust_panic_with_hook::h27b2c56b49aaf9e9
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/std/src/panicking.rs:804:13
  14:     0x7d3189e2d0f1 - std[a32dded7438b921f]::panicking::begin_panic::<rustc_errors[b6aefecbd15b7a86]::ExplicitBug>::{closure#0}
  15:     0x7d3189e200a6 - std[a32dded7438b921f]::sys::backtrace::__rust_end_short_backtrace::<std[a32dded7438b921f]::panicking::begin_panic<rustc_errors[b6aefecbd15b7a86]::ExplicitBug>::{closure#0}, !>
  16:     0x7d3189e20056 - std[a32dded7438b921f]::panicking::begin_panic::<rustc_errors[b6aefecbd15b7a86]::ExplicitBug>
  17:     0x7d3189e36331 - <rustc_errors[b6aefecbd15b7a86]::diagnostic::BugAbort as rustc_errors[b6aefecbd15b7a86]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  18:     0x7d318ab7417d - <rustc_errors[b6aefecbd15b7a86]::DiagCtxtHandle>::span_bug::<rustc_span[5b114e5127e2dfa0]::span_encoding::Span, alloc[e66b80bbeb26e33f]::string::String>
  19:     0x7d318ab90538 - rustc_middle[9e476e531f4cdc39]::util::bug::opt_span_bug_fmt::<rustc_span[5b114e5127e2dfa0]::span_encoding::Span>::{closure#0}
  20:     0x7d318ab9060a - rustc_middle[9e476e531f4cdc39]::ty::context::tls::with_opt::<rustc_middle[9e476e531f4cdc39]::util::bug::opt_span_bug_fmt<rustc_span[5b114e5127e2dfa0]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7d318ab8293b - rustc_middle[9e476e531f4cdc39]::ty::context::tls::with_context_opt::<rustc_middle[9e476e531f4cdc39]::ty::context::tls::with_opt<rustc_middle[9e476e531f4cdc39]::util::bug::opt_span_bug_fmt<rustc_span[5b114e5127e2dfa0]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7d318ab7d8d7 - rustc_middle[9e476e531f4cdc39]::util::bug::span_bug_fmt::<rustc_span[5b114e5127e2dfa0]::span_encoding::Span>
  23:     0x7d318ca13e69 - rustc_ty_utils[6227c5ec0897bdc]::assoc::associated_item_def_ids.cold
  24:     0x7d318b945529 - rustc_query_impl[823e173f31dca1d9]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[823e173f31dca1d9]::query_impl::associated_item_def_ids::dynamic_query::{closure#2}::{closure#0}, rustc_middle[9e476e531f4cdc39]::query::erase::Erased<[u8; 16usize]>>
  25:     0x7d318b9454d1 - <rustc_query_impl[823e173f31dca1d9]::query_impl::associated_item_def_ids::dynamic_query::{closure#2} as core[a1d5b26218b7595a]::ops::function::FnOnce<(rustc_middle[9e476e531f4cdc39]::ty::context::TyCtxt, rustc_span[5b114e5127e2dfa0]::def_id::DefId)>>::call_once
  26:     0x7d318b94affa - rustc_query_system[837d787005d5746e]::query::plumbing::try_execute_query::<rustc_query_impl[823e173f31dca1d9]::DynamicConfig<rustc_query_system[837d787005d5746e]::query::caches::DefIdCache<rustc_middle[9e476e531f4cdc39]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[823e173f31dca1d9]::plumbing::QueryCtxt, false>
  27:     0x7d318b94a9bf - rustc_query_impl[823e173f31dca1d9]::query_impl::associated_item_def_ids::get_query_non_incr::__rust_end_short_backtrace
  28:     0x7d318ba79b17 - rustc_middle[9e476e531f4cdc39]::query::plumbing::query_get_at::<rustc_query_system[837d787005d5746e]::query::caches::DefIdCache<rustc_middle[9e476e531f4cdc39]::query::erase::Erased<[u8; 16usize]>>>
  29:     0x7d318ba5b5a8 - rustc_hir_analysis[131fe9ac51ca670c]::check::wfcheck::check_trait
  30:     0x7d3188c11554 - rustc_hir_analysis[131fe9ac51ca670c]::check::wfcheck::check_well_formed
  31:     0x7d318ba40efd - rustc_query_impl[823e173f31dca1d9]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[823e173f31dca1d9]::query_impl::check_well_formed::dynamic_query::{closure#2}::{closure#0}, rustc_middle[9e476e531f4cdc39]::query::erase::Erased<[u8; 1usize]>>
  32:     0x7d318ba41175 - rustc_query_system[837d787005d5746e]::query::plumbing::try_execute_query::<rustc_query_impl[823e173f31dca1d9]::DynamicConfig<rustc_query_system[837d787005d5746e]::query::caches::VecCache<rustc_hir[ecde79dec73e1389]::hir_id::OwnerId, rustc_middle[9e476e531f4cdc39]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[823e173f31dca1d9]::plumbing::QueryCtxt, false>
  33:     0x7d318ba40eda - rustc_query_impl[823e173f31dca1d9]::query_impl::check_well_formed::get_query_non_incr::__rust_end_short_backtrace
  34:     0x7d318ba41b89 - rustc_hir_analysis[131fe9ac51ca670c]::check::wfcheck::check_mod_type_wf
  35:     0x7d318ba419d9 - rustc_query_impl[823e173f31dca1d9]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[823e173f31dca1d9]::query_impl::check_mod_type_wf::dynamic_query::{closure#2}::{closure#0}, rustc_middle[9e476e531f4cdc39]::query::erase::Erased<[u8; 1usize]>>
  36:     0x7d318c1288b8 - rustc_query_system[837d787005d5746e]::query::plumbing::try_execute_query::<rustc_query_impl[823e173f31dca1d9]::DynamicConfig<rustc_query_system[837d787005d5746e]::query::caches::DefaultCache<rustc_span[5b114e5127e2dfa0]::def_id::LocalModDefId, rustc_middle[9e476e531f4cdc39]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[823e173f31dca1d9]::plumbing::QueryCtxt, false>
  37:     0x7d318c128667 - rustc_query_impl[823e173f31dca1d9]::query_impl::check_mod_type_wf::get_query_non_incr::__rust_end_short_backtrace
  38:     0x7d318b6fd1c1 - rustc_hir_analysis[131fe9ac51ca670c]::check_crate
  39:     0x7d318b6f3215 - rustc_interface[b2c362fcb0f0a28c]::passes::analysis
  40:     0x7d318b6f2ddb - rustc_query_impl[823e173f31dca1d9]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[823e173f31dca1d9]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[9e476e531f4cdc39]::query::erase::Erased<[u8; 1usize]>>
  41:     0x7d318c2dcce5 - rustc_query_system[837d787005d5746e]::query::plumbing::try_execute_query::<rustc_query_impl[823e173f31dca1d9]::DynamicConfig<rustc_query_system[837d787005d5746e]::query::caches::SingleCache<rustc_middle[9e476e531f4cdc39]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[823e173f31dca1d9]::plumbing::QueryCtxt, false>
  42:     0x7d318c2dca4f - rustc_query_impl[823e173f31dca1d9]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  43:     0x7d318c21c407 - rustc_interface[b2c362fcb0f0a28c]::interface::run_compiler::<core[a1d5b26218b7595a]::result::Result<(), rustc_span[5b114e5127e2dfa0]::ErrorGuaranteed>, rustc_driver_impl[caf9fb610f137d76]::run_compiler::{closure#0}>::{closure#1}
  44:     0x7d318c19c689 - std[a32dded7438b921f]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[b2c362fcb0f0a28c]::util::run_in_thread_with_globals<rustc_interface[b2c362fcb0f0a28c]::util::run_in_thread_pool_with_globals<rustc_interface[b2c362fcb0f0a28c]::interface::run_compiler<core[a1d5b26218b7595a]::result::Result<(), rustc_span[5b114e5127e2dfa0]::ErrorGuaranteed>, rustc_driver_impl[caf9fb610f137d76]::run_compiler::{closure#0}>::{closure#1}, core[a1d5b26218b7595a]::result::Result<(), rustc_span[5b114e5127e2dfa0]::ErrorGuaranteed>>::{closure#0}, core[a1d5b26218b7595a]::result::Result<(), rustc_span[5b114e5127e2dfa0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[a1d5b26218b7595a]::result::Result<(), rustc_span[5b114e5127e2dfa0]::ErrorGuaranteed>>
  45:     0x7d318c19c43a - <<std[a32dded7438b921f]::thread::Builder>::spawn_unchecked_<rustc_interface[b2c362fcb0f0a28c]::util::run_in_thread_with_globals<rustc_interface[b2c362fcb0f0a28c]::util::run_in_thread_pool_with_globals<rustc_interface[b2c362fcb0f0a28c]::interface::run_compiler<core[a1d5b26218b7595a]::result::Result<(), rustc_span[5b114e5127e2dfa0]::ErrorGuaranteed>, rustc_driver_impl[caf9fb610f137d76]::run_compiler::{closure#0}>::{closure#1}, core[a1d5b26218b7595a]::result::Result<(), rustc_span[5b114e5127e2dfa0]::ErrorGuaranteed>>::{closure#0}, core[a1d5b26218b7595a]::result::Result<(), rustc_span[5b114e5127e2dfa0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[a1d5b26218b7595a]::result::Result<(), rustc_span[5b114e5127e2dfa0]::ErrorGuaranteed>>::{closure#2} as core[a1d5b26218b7595a]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  46:     0x7d318d97f27b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h8a74f28960a176f3
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/alloc/src/boxed.rs:2064:9
  47:     0x7d318d97f27b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3f01a028499c33ae
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/alloc/src/boxed.rs:2064:9
  48:     0x7d318d97f27b - std::sys::pal::unix::thread::Thread::new::thread_start::h256c3a78891e662c
                               at /rustc/221e2741c39515a5de6da42d8c76ee1e132c2c74/library/std/src/sys/pal/unix/thread.rs:108:17
  49:     0x7d31868a6ded - <unknown>
  50:     0x7d318692a0dc - <unknown>
  51:                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 1.81.0-nightly (221e2741c 2024-07-01) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [associated_item_def_ids] collecting associated items or fields of `Foo`
#1 [check_well_formed] checking that `Foo` is well-formed
end of query stack
error: aborting due to 5 previous errors

Some errors have detailed explanations: E0601, E0658.
For more information about an error, try `rustc --explain E0601`.