error: `~const` is not allowed here --> /tmp/icemaker_global_tempdir.U9NvpFL4hBFS/rustc_testrunner_tmpdir_reporting.rtzJvTxisvQ5/mvce.rs:5:17 | 5 | let _: &dyn ~const Trait; | ^^^^^^ | = note: trait objects cannot have `~const` trait bounds error[E0658]: const trait impls are experimental --> /tmp/icemaker_global_tempdir.U9NvpFL4hBFS/rustc_testrunner_tmpdir_reporting.rtzJvTxisvQ5/mvce.rs:5:17 | 5 | let _: &dyn ~const Trait; | ^^^^^^ | = note: see issue #67792 <https://github.com/rust-lang/rust/issues/67792> for more information = help: add `#![feature(const_trait_impl)]` to the crate attributes to enable = note: this compiler was built on 2024-06-29; consider upgrading it if it is out of date error[E0658]: `const_trait` is a temporary placeholder for marking a trait that is suitable for `const` `impls` and all default bodies as `const`, which may be removed or renamed in the future. --> /tmp/icemaker_global_tempdir.U9NvpFL4hBFS/rustc_testrunner_tmpdir_reporting.rtzJvTxisvQ5/mvce.rs:1:1 | 1 | #[const_trait] | ^^^^^^^^^^^^^^ | = note: see issue #67792 <https://github.com/rust-lang/rust/issues/67792> for more information = help: add `#![feature(const_trait_impl)]` to the crate attributes to enable = note: this compiler was built on 2024-06-29; consider upgrading it if it is out of date warning: the feature `effects` is incomplete and may not be safe to use and/or cause compiler crashes --> <crate attribute>:1:9 | 1 | feature(effects) | ^^^^^^^ | = note: see issue #102090 <https://github.com/rust-lang/rust/issues/102090> for more information = note: `#[warn(incomplete_features)]` on by default error[E0225]: only auto traits can be used as additional traits in a trait object --> /tmp/icemaker_global_tempdir.U9NvpFL4hBFS/rustc_testrunner_tmpdir_reporting.rtzJvTxisvQ5/mvce.rs:5:17 | 5 | let _: &dyn ~const Trait; | ^^^^^^^^^^^^ | | | additional non-auto trait | first non-auto trait | = help: consider creating a new trait with all of these as supertraits and using that trait here instead: `trait NewTrait: Compat + Trait {}` = note: auto-traits like `Send` and `Sync` are traits that have special properties; for more information on them, visit <https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits> thread 'rustc' panicked at compiler/rustc_hir_analysis/src/hir_ty_lowering/object_safety.rs:220:17: assertion `left == right` failed left: Alias(Projection, AliasTy { args: [FreshTy(0)], def_id: DefId(0:5 ~ mvce[9951]::Trait::{synthetic#0}) }) right: FreshTy(0) stack backtrace: 0: 0x7b4542dd22b5 - std::backtrace_rs::backtrace::libunwind::trace::h9fec972da723f824 at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5 1: 0x7b4542dd22b5 - std::backtrace_rs::backtrace::trace_unsynchronized::h6750dc8e20aabcad at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 2: 0x7b4542dd22b5 - std::sys::backtrace::_print_fmt::h112c52e5e2edb557 at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/sys/backtrace.rs:68:5 3: 0x7b4542dd22b5 - <std::sys::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h4713d06d34163f46 at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/sys/backtrace.rs:44:22 4: 0x7b4542e21d9b - core::fmt::rt::Argument::fmt::h919dfde74ebabb2a at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/core/src/fmt/rt.rs:173:76 5: 0x7b4542e21d9b - core::fmt::write::h63ad278710fcf618 at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/core/src/fmt/mod.rs:1174:21 6: 0x7b4542dc6e9f - std::io::Write::write_fmt::h48f75cc65a268f9a at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/io/mod.rs:1835:15 7: 0x7b4542dd208e - std::sys::backtrace::_print::ha47bd77a3336440c at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/sys/backtrace.rs:47:5 8: 0x7b4542dd208e - std::sys::backtrace::print::hd71c23c2433456bf at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/sys/backtrace.rs:34:9 9: 0x7b4542dd49d9 - std::panicking::default_hook::{{closure}}::ha7861419c6fed626 10: 0x7b4542dd477c - std::panicking::default_hook::hdb522e40b65d9458 at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/panicking.rs:292:9 11: 0x7b453f5b18a0 - std[ee1287dda0decb26]::panicking::update_hook::<alloc[ebf157a0a0183114]::boxed::Box<rustc_driver_impl[b3016c550210facb]::install_ice_hook::{closure#0}>>::{closure#0} 12: 0x7b4542dd52af - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h8a54893ded3fcd8c at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/alloc/src/boxed.rs:2078:9 13: 0x7b4542dd52af - std::panicking::rust_panic_with_hook::h79c7320e6dd14ff0 at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/panicking.rs:804:13 14: 0x7b4542dd4ed7 - std::panicking::begin_panic_handler::{{closure}}::h6bf6d623eeb925ff at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/panicking.rs:670:13 15: 0x7b4542dd2779 - std::sys::backtrace::__rust_end_short_backtrace::hae9fda2e5a3f99dc at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/sys/backtrace.rs:171:18 16: 0x7b4542dd4bb4 - rust_begin_unwind at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/panicking.rs:661:5 17: 0x7b4542e1e353 - core::panicking::panic_fmt::h1a6b0ab626f31f34 at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/core/src/panicking.rs:74:14 18: 0x7b4542e1e85e - core::panicking::assert_failed_inner::h966c5e9d880e17e0 at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/core/src/panicking.rs:410:17 19: 0x7b453f69c573 - core[a458eee17fffdec1]::panicking::assert_failed::<rustc_middle[375bbde5f17fb8ea]::ty::Ty, rustc_middle[375bbde5f17fb8ea]::ty::Ty> 20: 0x7b454164f142 - <core[a458eee17fffdec1]::iter::adapters::chain::Chain<core[a458eee17fffdec1]::iter::adapters::chain::Chain<core[a458eee17fffdec1]::iter::adapters::map::Map<core[a458eee17fffdec1]::iter::adapters::map::Map<core[a458eee17fffdec1]::slice::iter::Iter<rustc_trait_selection[19ae2f0c85cb8e17]::traits::util::TraitAliasExpansionInfo>, <dyn rustc_hir_analysis[190a10ac9c7209da]::hir_ty_lowering::HirTyLowerer>::lower_trait_object_ty::{closure#0}::{closure#9}>, <dyn rustc_hir_analysis[190a10ac9c7209da]::hir_ty_lowering::HirTyLowerer>::lower_trait_object_ty::{closure#0}::{closure#11}>, core[a458eee17fffdec1]::iter::adapters::map::Map<core[a458eee17fffdec1]::iter::adapters::map::Map<core[a458eee17fffdec1]::slice::iter::Iter<(rustc_type_ir[170e3520cb44ff2d]::binder::Binder<rustc_middle[375bbde5f17fb8ea]::ty::context::TyCtxt, rustc_type_ir[170e3520cb44ff2d]::predicate::ProjectionPredicate<rustc_middle[375bbde5f17fb8ea]::ty::context::TyCtxt>>, rustc_span[a32535cd2922901f]::span_encoding::Span)>, <dyn rustc_hir_analysis[190a10ac9c7209da]::hir_ty_lowering::HirTyLowerer>::lower_trait_object_ty::{closure#0}::{closure#10}>, <dyn rustc_hir_analysis[190a10ac9c7209da]::hir_ty_lowering::HirTyLowerer>::lower_trait_object_ty::{closure#0}::{closure#13}>>, core[a458eee17fffdec1]::iter::adapters::map::Map<alloc[ebf157a0a0183114]::vec::into_iter::IntoIter<rustc_trait_selection[19ae2f0c85cb8e17]::traits::util::TraitAliasExpansionInfo>, <dyn rustc_hir_analysis[190a10ac9c7209da]::hir_ty_lowering::HirTyLowerer>::lower_trait_object_ty::{closure#0}::{closure#12}>> as core[a458eee17fffdec1]::iter::traits::iterator::Iterator>::next 21: 0x7b454164b599 - <dyn rustc_hir_analysis[190a10ac9c7209da]::hir_ty_lowering::HirTyLowerer>::lower_trait_object_ty::{closure#0} 22: 0x7b454118c4ed - <dyn rustc_hir_analysis[190a10ac9c7209da]::hir_ty_lowering::HirTyLowerer>::lower_ty_common::{closure#0} 23: 0x7b454118bb81 - <dyn rustc_hir_analysis[190a10ac9c7209da]::hir_ty_lowering::HirTyLowerer>::lower_ty_common::{closure#0} 24: 0x7b454144fee8 - <rustc_hir_typeck[2dc35516be686cd]::gather_locals::GatherLocalsVisitor>::declare 25: 0x7b453d82fb52 - <rustc_hir_typeck[2dc35516be686cd]::gather_locals::GatherLocalsVisitor as rustc_hir[9cb815a008d04811]::intravisit::Visitor>::visit_expr 26: 0x7b4540cfc32d - rustc_hir_typeck[2dc35516be686cd]::check::check_fn 27: 0x7b4540cf1f5a - rustc_hir_typeck[2dc35516be686cd]::typeck 28: 0x7b4540cf1909 - rustc_query_impl[e193fcc3be99e64a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e193fcc3be99e64a]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[375bbde5f17fb8ea]::query::erase::Erased<[u8; 8usize]>> 29: 0x7b4540c45773 - rustc_query_system[ab5481f6c869ba71]::query::plumbing::try_execute_query::<rustc_query_impl[e193fcc3be99e64a]::DynamicConfig<rustc_query_system[ab5481f6c869ba71]::query::caches::VecCache<rustc_span[a32535cd2922901f]::def_id::LocalDefId, rustc_middle[375bbde5f17fb8ea]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[e193fcc3be99e64a]::plumbing::QueryCtxt, false> 30: 0x7b4540c4494d - rustc_query_impl[e193fcc3be99e64a]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace 31: 0x7b4540c44548 - <rustc_middle[375bbde5f17fb8ea]::hir::map::Map>::par_body_owners::<rustc_hir_analysis[190a10ac9c7209da]::check_crate::{closure#4}>::{closure#0} 32: 0x7b4540c428c5 - rustc_hir_analysis[190a10ac9c7209da]::check_crate 33: 0x7b4541145455 - rustc_interface[ab25a569cec44e98]::passes::analysis 34: 0x7b4541145015 - rustc_query_impl[e193fcc3be99e64a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[e193fcc3be99e64a]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[375bbde5f17fb8ea]::query::erase::Erased<[u8; 1usize]>> 35: 0x7b454181c2e5 - rustc_query_system[ab5481f6c869ba71]::query::plumbing::try_execute_query::<rustc_query_impl[e193fcc3be99e64a]::DynamicConfig<rustc_query_system[ab5481f6c869ba71]::query::caches::SingleCache<rustc_middle[375bbde5f17fb8ea]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[e193fcc3be99e64a]::plumbing::QueryCtxt, false> 36: 0x7b454181c04f - rustc_query_impl[e193fcc3be99e64a]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 37: 0x7b454175037f - rustc_interface[ab25a569cec44e98]::interface::run_compiler::<core[a458eee17fffdec1]::result::Result<(), rustc_span[a32535cd2922901f]::ErrorGuaranteed>, rustc_driver_impl[b3016c550210facb]::run_compiler::{closure#0}>::{closure#1} 38: 0x7b45416dc649 - std[ee1287dda0decb26]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[ab25a569cec44e98]::util::run_in_thread_with_globals<rustc_interface[ab25a569cec44e98]::util::run_in_thread_pool_with_globals<rustc_interface[ab25a569cec44e98]::interface::run_compiler<core[a458eee17fffdec1]::result::Result<(), rustc_span[a32535cd2922901f]::ErrorGuaranteed>, rustc_driver_impl[b3016c550210facb]::run_compiler::{closure#0}>::{closure#1}, core[a458eee17fffdec1]::result::Result<(), rustc_span[a32535cd2922901f]::ErrorGuaranteed>>::{closure#0}, core[a458eee17fffdec1]::result::Result<(), rustc_span[a32535cd2922901f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[a458eee17fffdec1]::result::Result<(), rustc_span[a32535cd2922901f]::ErrorGuaranteed>> 39: 0x7b45416dc3fa - <<std[ee1287dda0decb26]::thread::Builder>::spawn_unchecked_<rustc_interface[ab25a569cec44e98]::util::run_in_thread_with_globals<rustc_interface[ab25a569cec44e98]::util::run_in_thread_pool_with_globals<rustc_interface[ab25a569cec44e98]::interface::run_compiler<core[a458eee17fffdec1]::result::Result<(), rustc_span[a32535cd2922901f]::ErrorGuaranteed>, rustc_driver_impl[b3016c550210facb]::run_compiler::{closure#0}>::{closure#1}, core[a458eee17fffdec1]::result::Result<(), rustc_span[a32535cd2922901f]::ErrorGuaranteed>>::{closure#0}, core[a458eee17fffdec1]::result::Result<(), rustc_span[a32535cd2922901f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[a458eee17fffdec1]::result::Result<(), rustc_span[a32535cd2922901f]::ErrorGuaranteed>>::{closure#2} as core[a458eee17fffdec1]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 40: 0x7b4542ddf10b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc6d49d49179bb535 at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/alloc/src/boxed.rs:2064:9 41: 0x7b4542ddf10b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7270f16d3abba4aa at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/alloc/src/boxed.rs:2064:9 42: 0x7b4542ddf10b - std::sys::pal::unix::thread::Thread::new::thread_start::h3929f25d671aa35f at /rustc/ba1d7f4a083e6402679105115ded645512a7aea8/library/std/src/sys/pal/unix/thread.rs:108:17 43: 0x7b453c0a6ded - <unknown> 44: 0x7b453c12a0dc - <unknown> 45: 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 1.81.0-nightly (ba1d7f4a0 2024-06-29) running on x86_64-unknown-linux-gnu note: compiler flags: -Z crate-attr=feature(effects) -Z dump-mir-dir=dir query stack during panic: #0 [typeck] type-checking `main` #1 [analysis] running analysis passes on this crate end of query stack error: aborting due to 4 previous errors; 1 warning emitted Some errors have detailed explanations: E0225, E0658. For more information about an error, try `rustc --explain E0225`.