error[E0658]: const trait impls are experimental --> /tmp/icemaker_global_tempdir.m8yucfI0lXDa/rustc_testrunner_tmpdir_reporting.dPnmsUv2HB9L/mvce.rs:8:9 | 8 | impl<T> const Foo for T {} | ^^^^^ | = 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 error[E0658]: const trait impls are experimental --> /tmp/icemaker_global_tempdir.m8yucfI0lXDa/rustc_testrunner_tmpdir_reporting.dPnmsUv2HB9L/mvce.rs:10:9 | 10 | impl<T> const Foo for T where T: const Specialize {} | ^^^^^ | = 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 error[E0658]: const trait impls are experimental --> /tmp/icemaker_global_tempdir.m8yucfI0lXDa/rustc_testrunner_tmpdir_reporting.dPnmsUv2HB9L/mvce.rs:10:34 | 10 | impl<T> const Foo for T where T: const Specialize {} | ^^^^^ | = 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 error[E0601]: `main` function not found in crate `mvce` --> /tmp/icemaker_global_tempdir.m8yucfI0lXDa/rustc_testrunner_tmpdir_reporting.dPnmsUv2HB9L/mvce.rs:10:53 | 10 | impl<T> const Foo for T where T: const Specialize {} | ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.m8yucfI0lXDa/rustc_testrunner_tmpdir_reporting.dPnmsUv2HB9L/mvce.rs` error: const `impl` for trait `Foo` which is not marked with `#[const_trait]` --> /tmp/icemaker_global_tempdir.m8yucfI0lXDa/rustc_testrunner_tmpdir_reporting.dPnmsUv2HB9L/mvce.rs:8:15 | 6 | trait Foo {} | - help: mark `Foo` as const: `#[const_trait]` 7 | 8 | impl<T> const Foo for T {} | ^^^ | = note: marking a trait with `#[const_trait]` ensures all default method bodies are `const` = note: adding a non-const method body in the future would be a breaking change error: const `impl` for trait `Foo` which is not marked with `#[const_trait]` --> /tmp/icemaker_global_tempdir.m8yucfI0lXDa/rustc_testrunner_tmpdir_reporting.dPnmsUv2HB9L/mvce.rs:10:15 | 6 | trait Foo {} | - help: mark `Foo` as const: `#[const_trait]` ... 10 | impl<T> const Foo for T where T: const Specialize {} | ^^^ | = note: marking a trait with `#[const_trait]` ensures all default method bodies are `const` = note: adding a non-const method body in the future would be a breaking change error: `const` can only be applied to `#[const_trait]` traits --> /tmp/icemaker_global_tempdir.m8yucfI0lXDa/rustc_testrunner_tmpdir_reporting.dPnmsUv2HB9L/mvce.rs:10:40 | 10 | impl<T> const Foo for T where T: const Specialize {} | ^^^^^^^^^^ error[E0207]: the const parameter `host` is not constrained by the impl trait, self type, or predicates --> /tmp/icemaker_global_tempdir.m8yucfI0lXDa/rustc_testrunner_tmpdir_reporting.dPnmsUv2HB9L/mvce.rs:8:9 | 8 | impl<T> const Foo for T {} | ^^^^^ unconstrained const parameter | = note: expressions using a const parameter must map each value to a distinct output value = note: proving the result of expressions other than the parameter are unique is not supported error[E0207]: the const parameter `host` is not constrained by the impl trait, self type, or predicates --> /tmp/icemaker_global_tempdir.m8yucfI0lXDa/rustc_testrunner_tmpdir_reporting.dPnmsUv2HB9L/mvce.rs:10:9 | 10 | impl<T> const Foo for T where T: const Specialize {} | ^^^^^ unconstrained const parameter | = note: expressions using a const parameter must map each value to a distinct output value = note: proving the result of expressions other than the parameter are unique is not supported error: specialization impl does not specialize any associated items --> /tmp/icemaker_global_tempdir.m8yucfI0lXDa/rustc_testrunner_tmpdir_reporting.dPnmsUv2HB9L/mvce.rs:10:1 | 10 | impl<T> const Foo for T where T: const Specialize {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | note: impl is a specialization of this impl --> /tmp/icemaker_global_tempdir.m8yucfI0lXDa/rustc_testrunner_tmpdir_reporting.dPnmsUv2HB9L/mvce.rs:8:1 | 8 | impl<T> const Foo for T {} | ^^^^^^^^^^^^^^^^^^^^^^^ error: internal compiler error: /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/compiler/rustc_infer/src/infer/mod.rs:1434:21: `[T/#0, ?0e: bool]` is not fully resolved thread 'rustc' panicked at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/compiler/rustc_errors/src/lib.rs:937:30: Box<dyn Any> stack backtrace: 0: 0x7f554df8c7e6 - std::backtrace_rs::backtrace::libunwind::trace::h4e8b6d32d7dcd498 at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5 1: 0x7f554df8c7e6 - std::backtrace_rs::backtrace::trace_unsynchronized::ha88031840b9f4a2e at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 2: 0x7f554df8c7e6 - std::sys_common::backtrace::_print_fmt::h6c652548d6de2167 at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/std/src/sys_common/backtrace.rs:68:5 3: 0x7f554df8c7e6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h099aa61dbf587b72 at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/std/src/sys_common/backtrace.rs:44:22 4: 0x7f554dfdeec0 - core::fmt::rt::Argument::fmt::h8ea5c32ee70cc6ed at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/core/src/fmt/rt.rs:142:9 5: 0x7f554dfdeec0 - core::fmt::write::h465d7647510b0e90 at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/core/src/fmt/mod.rs:1120:17 6: 0x7f554df8014f - std::io::Write::write_fmt::h5c35515aeaa7e8fa at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/std/src/io/mod.rs:1810:15 7: 0x7f554df8c5c4 - std::sys_common::backtrace::_print::h3f03a228ef688f8b at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/std/src/sys_common/backtrace.rs:47:5 8: 0x7f554df8c5c4 - std::sys_common::backtrace::print::hfa61eeb1a7b5419d at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/std/src/sys_common/backtrace.rs:34:9 9: 0x7f554df8f357 - std::panicking::default_hook::{{closure}}::h6af33eb943d51021 10: 0x7f554df8f0b9 - std::panicking::default_hook::h7695ba792af1dd2f at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/std/src/panicking.rs:292:9 11: 0x7f5550d55bbc - std[f174e998751286d7]::panicking::update_hook::<alloc[dd0f9dac4d1c2b55]::boxed::Box<rustc_driver_impl[87d1b731212ed153]::install_ice_hook::{closure#0}>>::{closure#0} 12: 0x7f554df8faa6 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hef752b8be7573308 at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/alloc/src/boxed.rs:2030:9 13: 0x7f554df8faa6 - std::panicking::rust_panic_with_hook::h53b5c8441c16b7dc at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/std/src/panicking.rs:785:13 14: 0x7f5550d87c04 - std[f174e998751286d7]::panicking::begin_panic::<rustc_errors[1356d5bcd4a24573]::ExplicitBug>::{closure#0} 15: 0x7f5550d844f6 - std[f174e998751286d7]::sys_common::backtrace::__rust_end_short_backtrace::<std[f174e998751286d7]::panicking::begin_panic<rustc_errors[1356d5bcd4a24573]::ExplicitBug>::{closure#0}, !> 16: 0x7f5550d84166 - std[f174e998751286d7]::panicking::begin_panic::<rustc_errors[1356d5bcd4a24573]::ExplicitBug> 17: 0x7f5550d92c81 - <rustc_errors[1356d5bcd4a24573]::diagnostic_builder::BugAbort as rustc_errors[1356d5bcd4a24573]::diagnostic_builder::EmissionGuarantee>::emit_producing_guarantee 18: 0x7f555115a6ae - <rustc_errors[1356d5bcd4a24573]::DiagCtxt>::bug::<alloc[dd0f9dac4d1c2b55]::string::String> 19: 0x7f55511f309b - rustc_middle[2f8d8a9fb975d25e]::util::bug::opt_span_bug_fmt::<rustc_span[67cae37aa81b7c83]::span_encoding::Span>::{closure#0} 20: 0x7f55511dbc8a - rustc_middle[2f8d8a9fb975d25e]::ty::context::tls::with_opt::<rustc_middle[2f8d8a9fb975d25e]::util::bug::opt_span_bug_fmt<rustc_span[67cae37aa81b7c83]::span_encoding::Span>::{closure#0}, !>::{closure#0} 21: 0x7f55511dbb28 - rustc_middle[2f8d8a9fb975d25e]::ty::context::tls::with_context_opt::<rustc_middle[2f8d8a9fb975d25e]::ty::context::tls::with_opt<rustc_middle[2f8d8a9fb975d25e]::util::bug::opt_span_bug_fmt<rustc_span[67cae37aa81b7c83]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !> 22: 0x7f554f18d810 - rustc_middle[2f8d8a9fb975d25e]::util::bug::bug_fmt 23: 0x7f5550e8b071 - rustc_hir_analysis[1e63daf843f87d]::impl_wf_check::min_specialization::get_impl_args 24: 0x7f5552c1e75f - rustc_hir_analysis[1e63daf843f87d]::impl_wf_check::check_mod_impl_wf 25: 0x7f5552c1b79d - rustc_query_impl[16d1cd34db60958]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[16d1cd34db60958]::query_impl::check_mod_impl_wf::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2f8d8a9fb975d25e]::query::erase::Erased<[u8; 0usize]>> 26: 0x7f5552caed8f - rustc_query_system[7153283b9fb9fb6d]::query::plumbing::try_execute_query::<rustc_query_impl[16d1cd34db60958]::DynamicConfig<rustc_query_system[7153283b9fb9fb6d]::query::caches::DefaultCache<rustc_span[67cae37aa81b7c83]::def_id::LocalModDefId, rustc_middle[2f8d8a9fb975d25e]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[16d1cd34db60958]::plumbing::QueryCtxt, false> 27: 0x7f5552cae81f - rustc_query_impl[16d1cd34db60958]::query_impl::check_mod_impl_wf::get_query_non_incr::__rust_end_short_backtrace 28: 0x7f55525040bb - rustc_hir_analysis[1e63daf843f87d]::check_crate 29: 0x7f5552a562d9 - rustc_interface[c9e2075c66deb843]::passes::analysis 30: 0x7f5552a55f1f - rustc_query_impl[16d1cd34db60958]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[16d1cd34db60958]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2f8d8a9fb975d25e]::query::erase::Erased<[u8; 1usize]>> 31: 0x7f5552fc47a4 - rustc_query_system[7153283b9fb9fb6d]::query::plumbing::try_execute_query::<rustc_query_impl[16d1cd34db60958]::DynamicConfig<rustc_query_system[7153283b9fb9fb6d]::query::caches::SingleCache<rustc_middle[2f8d8a9fb975d25e]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[16d1cd34db60958]::plumbing::QueryCtxt, false> 32: 0x7f5552fc4595 - rustc_query_impl[16d1cd34db60958]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 33: 0x7f5552d49408 - rustc_interface[c9e2075c66deb843]::interface::run_compiler::<core[61d3efaba9c696db]::result::Result<(), rustc_span[67cae37aa81b7c83]::ErrorGuaranteed>, rustc_driver_impl[87d1b731212ed153]::run_compiler::{closure#0}>::{closure#0} 34: 0x7f5552fe6fc6 - std[f174e998751286d7]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[c9e2075c66deb843]::util::run_in_thread_with_globals<rustc_interface[c9e2075c66deb843]::util::run_in_thread_pool_with_globals<rustc_interface[c9e2075c66deb843]::interface::run_compiler<core[61d3efaba9c696db]::result::Result<(), rustc_span[67cae37aa81b7c83]::ErrorGuaranteed>, rustc_driver_impl[87d1b731212ed153]::run_compiler::{closure#0}>::{closure#0}, core[61d3efaba9c696db]::result::Result<(), rustc_span[67cae37aa81b7c83]::ErrorGuaranteed>>::{closure#0}, core[61d3efaba9c696db]::result::Result<(), rustc_span[67cae37aa81b7c83]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[61d3efaba9c696db]::result::Result<(), rustc_span[67cae37aa81b7c83]::ErrorGuaranteed>> 35: 0x7f5552fe6df3 - <<std[f174e998751286d7]::thread::Builder>::spawn_unchecked_<rustc_interface[c9e2075c66deb843]::util::run_in_thread_with_globals<rustc_interface[c9e2075c66deb843]::util::run_in_thread_pool_with_globals<rustc_interface[c9e2075c66deb843]::interface::run_compiler<core[61d3efaba9c696db]::result::Result<(), rustc_span[67cae37aa81b7c83]::ErrorGuaranteed>, rustc_driver_impl[87d1b731212ed153]::run_compiler::{closure#0}>::{closure#0}, core[61d3efaba9c696db]::result::Result<(), rustc_span[67cae37aa81b7c83]::ErrorGuaranteed>>::{closure#0}, core[61d3efaba9c696db]::result::Result<(), rustc_span[67cae37aa81b7c83]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[61d3efaba9c696db]::result::Result<(), rustc_span[67cae37aa81b7c83]::ErrorGuaranteed>>::{closure#1} as core[61d3efaba9c696db]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 36: 0x7f554df999d5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3063de10ed539a03 at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/alloc/src/boxed.rs:2016:9 37: 0x7f554df999d5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::heefcae306faffc01 at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/alloc/src/boxed.rs:2016:9 38: 0x7f554df999d5 - std::sys::unix::thread::Thread::new::thread_start::h5c4b5675991b9c64 at /rustc/e9271846294c4ee5bd7706df68180320c0b5ff20/library/std/src/sys/unix/thread.rs:108:17 39: 0x7f554dd859eb - <unknown> 40: 0x7f554de097cc - <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: rustc 1.77.0-nightly (e92718462 2024-01-10) running on x86_64-unknown-linux-gnu query stack during panic: #0 [check_mod_impl_wf] checking that impls are well-formed in top-level module #1 [analysis] running analysis passes on this crate end of query stack error: aborting due to 11 previous errors Some errors have detailed explanations: E0207, E0601, E0658. For more information about an error, try `rustc --explain E0207`.