error[E0658]: `impl Trait` in type aliases is unstable --> /tmp/icemaker_global_tempdir.P292uEtBs2RF/rustc_testrunner_tmpdir_reporting.qNCz5tflPNXt/mvce.rs:1:12 | 1 | type Foo = impl Send; | ^^^^^^^^^ | = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable = note: this compiler was built on 2024-03-08; consider upgrading it if it is out of date error[E0601]: `main` function not found in crate `mvce` --> /tmp/icemaker_global_tempdir.P292uEtBs2RF/rustc_testrunner_tmpdir_reporting.qNCz5tflPNXt/mvce.rs:13:2 | 13 | } | ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.P292uEtBs2RF/rustc_testrunner_tmpdir_reporting.qNCz5tflPNXt/mvce.rs` error[E0425]: cannot find function `value` in this scope --> /tmp/icemaker_global_tempdir.P292uEtBs2RF/rustc_testrunner_tmpdir_reporting.qNCz5tflPNXt/mvce.rs:5:20 | 5 | const VALUE: Foo = value(); | ^^^^^ not found in this scope error: item constrains opaque type that is not in its signature --> /tmp/icemaker_global_tempdir.P292uEtBs2RF/rustc_testrunner_tmpdir_reporting.qNCz5tflPNXt/mvce.rs:9:13 | 9 | 0 | 0 => {} | ^ | = note: this item must mention the opaque type in its signature in order to be able to register hidden types note: this item must mention the opaque type in its signature in order to be able to register hidden types --> /tmp/icemaker_global_tempdir.P292uEtBs2RF/rustc_testrunner_tmpdir_reporting.qNCz5tflPNXt/mvce.rs:7:4 | 7 | fn test() { | ^^^^ warning: unreachable pattern --> /tmp/icemaker_global_tempdir.P292uEtBs2RF/rustc_testrunner_tmpdir_reporting.qNCz5tflPNXt/mvce.rs:9:13 | 9 | 0 | 0 => {} | ^ | = note: `#[warn(unreachable_patterns)]` on by default error: internal compiler error: compiler/rustc_const_eval/src/transform/validate.rs:1302:30: unhandled type: {type error} thread 'rustc' panicked at compiler/rustc_middle/src/util/bug.rs:35:44: Box<dyn Any> stack backtrace: 0: 0x7fdf7f18ca52 - std::backtrace_rs::backtrace::libunwind::trace::hb56c0f78213c8d9f at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5 1: 0x7fdf7f18ca52 - std::backtrace_rs::backtrace::trace_unsynchronized::hf06d37baed012a8b at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 2: 0x7fdf7f18ca52 - std::sys_common::backtrace::_print_fmt::hb3319ebb8df50ed8 at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/std/src/sys_common/backtrace.rs:68:5 3: 0x7fdf7f18ca52 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h803c3eeec75e4f63 at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/std/src/sys_common/backtrace.rs:44:22 4: 0x7fdf7f1dda5c - core::fmt::rt::Argument::fmt::h94e1da2f5ffac2b0 at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/core/src/fmt/rt.rs:142:9 5: 0x7fdf7f1dda5c - core::fmt::write::h187ead52a5135d3b at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/core/src/fmt/mod.rs:1153:17 6: 0x7fdf7f1814cf - std::io::Write::write_fmt::h5d3f9c61f41d2590 at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/std/src/io/mod.rs:1846:15 7: 0x7fdf7f18c824 - std::sys_common::backtrace::_print::ha9efa2585b9464f2 at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/std/src/sys_common/backtrace.rs:47:5 8: 0x7fdf7f18c824 - std::sys_common::backtrace::print::h23c465429e472e6b at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/std/src/sys_common/backtrace.rs:34:9 9: 0x7fdf7f18f52b - std::panicking::default_hook::{{closure}}::h984357cf4f22a420 10: 0x7fdf7f18f287 - std::panicking::default_hook::hf3edc1c39c54e0a3 at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/std/src/panicking.rs:292:9 11: 0x7fdf8205c02c - std[6fed0b3d7eb5db8f]::panicking::update_hook::<alloc[c7d5fdcd1c175fc6]::boxed::Box<rustc_driver_impl[205ec082ad015eb1]::install_ice_hook::{closure#0}>>::{closure#0} 12: 0x7fdf7f18fc90 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h3ef6d0b8345c8bff at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/alloc/src/boxed.rs:2030:9 13: 0x7fdf7f18fc90 - std::panicking::rust_panic_with_hook::h2b299f843211a151 at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/std/src/panicking.rs:783:13 14: 0x7fdf82089034 - std[6fed0b3d7eb5db8f]::panicking::begin_panic::<rustc_errors[366873c695d5609e]::ExplicitBug>::{closure#0} 15: 0x7fdf82085c86 - std[6fed0b3d7eb5db8f]::sys_common::backtrace::__rust_end_short_backtrace::<std[6fed0b3d7eb5db8f]::panicking::begin_panic<rustc_errors[366873c695d5609e]::ExplicitBug>::{closure#0}, !> 16: 0x7fdf820811b6 - std[6fed0b3d7eb5db8f]::panicking::begin_panic::<rustc_errors[366873c695d5609e]::ExplicitBug> 17: 0x7fdf820923d1 - <rustc_errors[366873c695d5609e]::diagnostic::BugAbort as rustc_errors[366873c695d5609e]::diagnostic::EmissionGuarantee>::emit_producing_guarantee 18: 0x7fdf8250fb61 - rustc_middle[aecd23319abffe8]::util::bug::opt_span_bug_fmt::<rustc_span[1b87e9fe8fb1a926]::span_encoding::Span>::{closure#0} 19: 0x7fdf824f33fa - rustc_middle[aecd23319abffe8]::ty::context::tls::with_opt::<rustc_middle[aecd23319abffe8]::util::bug::opt_span_bug_fmt<rustc_span[1b87e9fe8fb1a926]::span_encoding::Span>::{closure#0}, !>::{closure#0} 20: 0x7fdf824f3278 - rustc_middle[aecd23319abffe8]::ty::context::tls::with_context_opt::<rustc_middle[aecd23319abffe8]::ty::context::tls::with_opt<rustc_middle[aecd23319abffe8]::util::bug::opt_span_bug_fmt<rustc_span[1b87e9fe8fb1a926]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !> 21: 0x7fdf80a34120 - rustc_middle[aecd23319abffe8]::util::bug::bug_fmt 22: 0x7fdf80c97fb9 - <rustc_const_eval[95eca17ec43bf463]::transform::validate::TypeChecker as rustc_middle[aecd23319abffe8]::mir::visit::Visitor>::visit_terminator 23: 0x7fdf83e92847 - rustc_const_eval[95eca17ec43bf463]::transform::validate::validate_types 24: 0x7fdf80c7c843 - <rustc_const_eval[95eca17ec43bf463]::transform::validate::Validator as rustc_middle[aecd23319abffe8]::mir::MirPass>::run_pass 25: 0x7fdf81af65d0 - rustc_mir_transform[871016de5a10e3d3]::pass_manager::validate_body 26: 0x7fdf8341390a - rustc_mir_transform[871016de5a10e3d3]::pass_manager::run_passes_inner 27: 0x7fdf83b3de62 - rustc_mir_transform[871016de5a10e3d3]::mir_drops_elaborated_and_const_checked 28: 0x7fdf83b3d721 - rustc_query_impl[6b7a6552b37014cc]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[6b7a6552b37014cc]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle[aecd23319abffe8]::query::erase::Erased<[u8; 8usize]>> 29: 0x7fdf83530b3b - rustc_query_system[b1c5429972f486b9]::query::plumbing::try_execute_query::<rustc_query_impl[6b7a6552b37014cc]::DynamicConfig<rustc_query_system[b1c5429972f486b9]::query::caches::VecCache<rustc_span[1b87e9fe8fb1a926]::def_id::LocalDefId, rustc_middle[aecd23319abffe8]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[6b7a6552b37014cc]::plumbing::QueryCtxt, false> 30: 0x7fdf8353041c - rustc_query_impl[6b7a6552b37014cc]::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace 31: 0x7fdf83fe8010 - rustc_interface[9dbce73f39987c61]::passes::analysis 32: 0x7fdf83fe77d9 - rustc_query_impl[6b7a6552b37014cc]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[6b7a6552b37014cc]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[aecd23319abffe8]::query::erase::Erased<[u8; 1usize]>> 33: 0x7fdf841499e5 - rustc_query_system[b1c5429972f486b9]::query::plumbing::try_execute_query::<rustc_query_impl[6b7a6552b37014cc]::DynamicConfig<rustc_query_system[b1c5429972f486b9]::query::caches::SingleCache<rustc_middle[aecd23319abffe8]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[6b7a6552b37014cc]::plumbing::QueryCtxt, false> 34: 0x7fdf84149749 - rustc_query_impl[6b7a6552b37014cc]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 35: 0x7fdf8415702f - rustc_interface[9dbce73f39987c61]::interface::run_compiler::<core[b7a137df7f3ab9dc]::result::Result<(), rustc_span[1b87e9fe8fb1a926]::ErrorGuaranteed>, rustc_driver_impl[205ec082ad015eb1]::run_compiler::{closure#0}>::{closure#0} 36: 0x7fdf843ce705 - std[6fed0b3d7eb5db8f]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[9dbce73f39987c61]::util::run_in_thread_with_globals<rustc_interface[9dbce73f39987c61]::util::run_in_thread_pool_with_globals<rustc_interface[9dbce73f39987c61]::interface::run_compiler<core[b7a137df7f3ab9dc]::result::Result<(), rustc_span[1b87e9fe8fb1a926]::ErrorGuaranteed>, rustc_driver_impl[205ec082ad015eb1]::run_compiler::{closure#0}>::{closure#0}, core[b7a137df7f3ab9dc]::result::Result<(), rustc_span[1b87e9fe8fb1a926]::ErrorGuaranteed>>::{closure#0}, core[b7a137df7f3ab9dc]::result::Result<(), rustc_span[1b87e9fe8fb1a926]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b7a137df7f3ab9dc]::result::Result<(), rustc_span[1b87e9fe8fb1a926]::ErrorGuaranteed>> 37: 0x7fdf843ce532 - <<std[6fed0b3d7eb5db8f]::thread::Builder>::spawn_unchecked_<rustc_interface[9dbce73f39987c61]::util::run_in_thread_with_globals<rustc_interface[9dbce73f39987c61]::util::run_in_thread_pool_with_globals<rustc_interface[9dbce73f39987c61]::interface::run_compiler<core[b7a137df7f3ab9dc]::result::Result<(), rustc_span[1b87e9fe8fb1a926]::ErrorGuaranteed>, rustc_driver_impl[205ec082ad015eb1]::run_compiler::{closure#0}>::{closure#0}, core[b7a137df7f3ab9dc]::result::Result<(), rustc_span[1b87e9fe8fb1a926]::ErrorGuaranteed>>::{closure#0}, core[b7a137df7f3ab9dc]::result::Result<(), rustc_span[1b87e9fe8fb1a926]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[b7a137df7f3ab9dc]::result::Result<(), rustc_span[1b87e9fe8fb1a926]::ErrorGuaranteed>>::{closure#1} as core[b7a137df7f3ab9dc]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 38: 0x7fdf7f199435 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h8df09d4849ce0fbf at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/alloc/src/boxed.rs:2016:9 39: 0x7fdf7f199435 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h8b606ed8e7a34b19 at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/alloc/src/boxed.rs:2016:9 40: 0x7fdf7f199435 - std::sys::pal::unix::thread::Thread::new::thread_start::hf3f71e6bccca7599 at /rustc/1b2c53a15dba7962cfc284c3b6d61a0341ffa27a/library/std/src/sys/pal/unix/thread.rs:108:17 41: 0x7fdf7ef7c55a - <unknown> 42: 0x7fdf7eff9a3c - <unknown> 43: 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 1.78.0-nightly (1b2c53a15 2024-03-08) running on x86_64-unknown-linux-gnu note: compiler flags: -Z validate-mir -Z dump-mir-dir=dir query stack during panic: #0 [mir_drops_elaborated_and_const_checked] elaborating drops for `test` #1 [analysis] running analysis passes on this crate end of query stack error: aborting due to 5 previous errors; 1 warning emitted Some errors have detailed explanations: E0425, E0601, E0658. For more information about an error, try `rustc --explain E0425`.