error: internal compiler error: no errors encountered even though `delay_span_bug` issued error: internal compiler error: `async` functions cannot be `const fn` --> crash.rs:5:5 | 5 | async fn ft1() {} | ^^^^^^^^^^^^^^^^^ | note: delayed at compiler/rustc_const_eval/src/transform/check_consts/check.rs:251:22 0: <rustc_errors::HandlerInner>::emit_diagnostic 1: <rustc_session::session::Session>::delay_span_bug::<rustc_span::span_encoding::Span, &str> 2: rustc_mir_transform::mir_const_qualif 3: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::mir_const_qualif::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 5]>> 4: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 5]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 5: rustc_query_impl::query_impl::mir_const_qualif::get_query_non_incr::__rust_end_short_backtrace 6: rustc_mir_transform::mir_promoted 7: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::mir_promoted::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>> 8: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 16]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 9: rustc_query_impl::query_impl::mir_promoted::get_query_non_incr::__rust_end_short_backtrace 10: rustc_borrowck::mir_borrowck 11: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>> 12: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 13: rustc_query_impl::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace 14: rustc_hir_analysis::collect::type_of::type_of_opaque 15: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::type_of_opaque::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>> 16: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 17: rustc_query_impl::query_impl::type_of_opaque::get_query_non_incr::__rust_end_short_backtrace 18: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>> 19: rustc_hir_analysis::collect::type_of::type_of 20: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::type_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>> 21: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 22: rustc_query_impl::query_impl::type_of::get_query_non_incr::__rust_end_short_backtrace 23: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>> 24: rustc_hir_analysis::check::check::check_mod_item_types 25: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::check_mod_item_types::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 0]>> 26: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalModDefId, rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 27: rustc_query_impl::query_impl::check_mod_item_types::get_query_non_incr::__rust_end_short_backtrace 28: rustc_hir_analysis::check_crate 29: rustc_interface::passes::analysis 30: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 1]>> 31: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 1]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 32: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 33: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0} 34: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>> 35: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 36: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once at /rustc/c1ccc29cd6eeb79f24511d75e9db553385a5d73f/library/alloc/src/boxed.rs:2007:9 37: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once at /rustc/c1ccc29cd6eeb79f24511d75e9db553385a5d73f/library/alloc/src/boxed.rs:2007:9 38: std::sys::unix::thread::Thread::new::thread_start at /rustc/c1ccc29cd6eeb79f24511d75e9db553385a5d73f/library/std/src/sys/unix/thread.rs:108:17 39: <unknown> 40: <unknown> --> crash.rs:5:5 | 5 | async fn ft1() {} | ^^^^^^^^^^^^^^^^^ 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 attach the file at `/tmp/icemaker/rustc-ice-2023-11-06T10_23_53-2751136.txt` to your bug report query stack during panic: end of query stack error: aborting due to 2 previous errors