Error at async function with enum matching

[TTTiNNNy]

Code

enum En1 {
    Var1(()),
}

async fn func(en: En1) {
    match en {
        En1::Var1(val) => match val {},
    }
}

Meta

Build using the Beta version: 1.75.0-beta.1

(2023-11-12 782883f609713fe9617b)

Error output

error: internal compiler error: compiler/rustc_mir_transform/src/coroutine.rs:1463:14: unexpected coroutine type Pin<&mut {async fn body@src/main.rs:83:39: 87:2}>
  --> src/main.rs:83:39
   |
83 |   async fn transaction(operations: En1) {
   |  _______________________________________^
84 | |     match operations {
85 | |         En1::Var1(val) => match val {},
86 | |     }
87 | | }
   | |_^

thread 'rustc' panicked at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/compiler/rustc_errors/src/lib.rs:999:33:
Box<dyn Any>

Backtrace

stack backtrace:
   0:     0x7f04ddc2589c - std::backtrace_rs::backtrace::libunwind::trace::ha293b6d87ccf1f1c
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
   1:     0x7f04ddc2589c - std::backtrace_rs::backtrace::trace_unsynchronized::h490dbd5f01054bca
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f04ddc2589c - std::sys_common::backtrace::_print_fmt::hb9cac74d01a13d4b
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x7f04ddc2589c - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hcf57bf5852a8c416
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f04ddc788a0 - core::fmt::rt::Argument::fmt::h5de7bc4768ddf33e
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/core/src/fmt/rt.rs:142:9
   5:     0x7f04ddc788a0 - core::fmt::write::hbbbf6d556f1ac8b9
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/core/src/fmt/mod.rs:1120:17
   6:     0x7f04ddc1972f - std::io::Write::write_fmt::h1b479e1ec81bc956
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/std/src/io/mod.rs:1762:15
   7:     0x7f04ddc25684 - std::sys_common::backtrace::_print::hd9cfabd7d6a771d4
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f04ddc25684 - std::sys_common::backtrace::print::h07393481cb263284
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f04ddc28317 - std::panicking::default_hook::{{closure}}::hb1598819f87c42e5
  10:     0x7f04ddc2807f - std::panicking::default_hook::h7f873e973269c845
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/std/src/panicking.rs:292:9
  11:     0x7f04da8ea570 - std[14019a58b7d275f1]::panicking::update_hook::<alloc[ad6fb59b907768cd]::boxed::Box<rustc_driver_impl[5f75542baa940ca0]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7f04ddc28a58 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h704679cae2ba6984
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/alloc/src/boxed.rs:2021:9
  13:     0x7f04ddc28a58 - std::panicking::rust_panic_with_hook::he9c5618dc5aecbda
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/std/src/panicking.rs:783:13
  14:     0x7f04daf08f14 - std[14019a58b7d275f1]::panicking::begin_panic::<rustc_errors[30021261b551d970]::ExplicitBug>::{closure#0}
  15:     0x7f04daeee006 - std[14019a58b7d275f1]::sys_common::backtrace::__rust_end_short_backtrace::<std[14019a58b7d275f1]::panicking::begin_panic<rustc_errors[30021261b551d970]::ExplicitBug>::{closure#0}, !>
  16:     0x7f04daee8be6 - std[14019a58b7d275f1]::panicking::begin_panic::<rustc_errors[30021261b551d970]::ExplicitBug>
  17:     0x7f04daedfe4e - <rustc_errors[30021261b551d970]::HandlerInner>::span_bug::<rustc_span[a628673111809004]::span_encoding::Span, alloc[ad6fb59b907768cd]::string::String>
  18:     0x7f04daed4a58 - <rustc_errors[30021261b551d970]::Handler>::span_bug::<rustc_span[a628673111809004]::span_encoding::Span, alloc[ad6fb59b907768cd]::string::String>
  19:     0x7f04daf0905b - rustc_middle[152bbcda416848dc]::util::bug::opt_span_bug_fmt::<rustc_span[a628673111809004]::span_encoding::Span>::{closure#0}
  20:     0x7f04daf0908a - rustc_middle[152bbcda416848dc]::ty::context::tls::with_opt::<rustc_middle[152bbcda416848dc]::util::bug::opt_span_bug_fmt<rustc_span[a628673111809004]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7f04daefeb78 - rustc_middle[152bbcda416848dc]::ty::context::tls::with_context_opt::<rustc_middle[152bbcda416848dc]::ty::context::tls::with_opt<rustc_middle[152bbcda416848dc]::util::bug::opt_span_bug_fmt<rustc_span[a628673111809004]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7f04d982bc34 - rustc_middle[152bbcda416848dc]::util::bug::span_bug_fmt::<rustc_span[a628673111809004]::span_encoding::Span>
  23:     0x7f04daf9b2f2 - rustc_mir_transform[c7b2aa5ff33101ec]::coroutine::mir_coroutine_witnesses
  24:     0x7f04db16467c - rustc_query_impl[b6f65b6a449d1433]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b6f65b6a449d1433]::query_impl::mir_coroutine_witnesses::dynamic_query::{closure#2}::{closure#0}, rustc_middle[152bbcda416848dc]::query::erase::Erased<[u8; 8usize]>>
  25:     0x7f04dbfa75e8 - rustc_query_system[b64554a9092e067b]::query::plumbing::try_execute_query::<rustc_query_impl[b6f65b6a449d1433]::DynamicConfig<rustc_query_system[b64554a9092e067b]::query::caches::DefaultCache<rustc_span[a628673111809004]::def_id::DefId, rustc_middle[152bbcda416848dc]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[b6f65b6a449d1433]::plumbing::QueryCtxt, true>
  26:     0x7f04db16a65d - rustc_query_impl[b6f65b6a449d1433]::query_impl::mir_coroutine_witnesses::get_query_incr::__rust_end_short_backtrace
  27:     0x7f04dbda1ed8 - rustc_middle[152bbcda416848dc]::query::plumbing::query_get_at::<rustc_query_system[b64554a9092e067b]::query::caches::DefaultCache<rustc_span[a628673111809004]::def_id::DefId, rustc_middle[152bbcda416848dc]::query::erase::Erased<[u8; 8usize]>>>
  28:     0x7f04dd1531fd - <rustc_middle[152bbcda416848dc]::ty::util::OpaqueTypeExpander as rustc_type_ir[333e1393af7593e5]::fold::TypeFolder<rustc_middle[152bbcda416848dc]::ty::context::TyCtxt>>::fold_ty.cold.0
  29:     0x7f04dc63049e - <&rustc_middle[152bbcda416848dc]::ty::list::List<rustc_middle[152bbcda416848dc]::ty::generic_args::GenericArg> as rustc_type_ir[333e1393af7593e5]::fold::TypeFoldable<rustc_middle[152bbcda416848dc]::ty::context::TyCtxt>>::try_fold_with::<rustc_middle[152bbcda416848dc]::ty::util::OpaqueTypeExpander>
  30:     0x7f04dd1533f3 - <rustc_middle[152bbcda416848dc]::ty::util::OpaqueTypeExpander as rustc_type_ir[333e1393af7593e5]::fold::TypeFolder<rustc_middle[152bbcda416848dc]::ty::context::TyCtxt>>::fold_ty.cold.0
  31:     0x7f04dc630c5f - <rustc_middle[152bbcda416848dc]::ty::util::OpaqueTypeExpander>::expand_opaque_ty
  32:     0x7f04dc630998 - <rustc_middle[152bbcda416848dc]::ty::context::TyCtxt>::try_expand_impl_trait_type
  33:     0x7f04dc36e36d - rustc_hir_analysis[b35314468770b41e]::check::check::check_mod_item_types
  34:     0x7f04dc36cd53 - rustc_query_impl[b6f65b6a449d1433]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b6f65b6a449d1433]::query_impl::check_mod_item_types::dynamic_query::{closure#2}::{closure#0}, rustc_middle[152bbcda416848dc]::query::erase::Erased<[u8; 0usize]>>
  35:     0x7f04dc57792b - rustc_query_system[b64554a9092e067b]::query::plumbing::try_execute_query::<rustc_query_impl[b6f65b6a449d1433]::DynamicConfig<rustc_query_system[b64554a9092e067b]::query::caches::DefaultCache<rustc_span[a628673111809004]::def_id::LocalModDefId, rustc_middle[152bbcda416848dc]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[b6f65b6a449d1433]::plumbing::QueryCtxt, true>
  36:     0x7f04dc577440 - rustc_query_impl[b6f65b6a449d1433]::query_impl::check_mod_item_types::get_query_incr::__rust_end_short_backtrace
  37:     0x7f04dc215e15 - rustc_hir_analysis[b35314468770b41e]::check_crate
  38:     0x7f04dbf9a497 - rustc_interface[1968ba18ecfdcdc8]::passes::analysis
  39:     0x7f04dbf9a0dd - rustc_query_impl[b6f65b6a449d1433]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[b6f65b6a449d1433]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[152bbcda416848dc]::query::erase::Erased<[u8; 1usize]>>
  40:     0x7f04dcb96acb - rustc_query_system[b64554a9092e067b]::query::plumbing::try_execute_query::<rustc_query_impl[b6f65b6a449d1433]::DynamicConfig<rustc_query_system[b64554a9092e067b]::query::caches::SingleCache<rustc_middle[152bbcda416848dc]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[b6f65b6a449d1433]::plumbing::QueryCtxt, true>
  41:     0x7f04dcb96774 - rustc_query_impl[b6f65b6a449d1433]::query_impl::analysis::get_query_incr::__rust_end_short_backtrace
  42:     0x7f04dcbb0d3f - rustc_interface[1968ba18ecfdcdc8]::interface::run_compiler::<core[a62a0f03b43184e2]::result::Result<(), rustc_span[a628673111809004]::ErrorGuaranteed>, rustc_driver_impl[5f75542baa940ca0]::run_compiler::{closure#1}>::{closure#0}
  43:     0x7f04dcbb8059 - std[14019a58b7d275f1]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[1968ba18ecfdcdc8]::util::run_in_thread_with_globals<rustc_interface[1968ba18ecfdcdc8]::util::run_in_thread_pool_with_globals<rustc_interface[1968ba18ecfdcdc8]::interface::run_compiler<core[a62a0f03b43184e2]::result::Result<(), rustc_span[a628673111809004]::ErrorGuaranteed>, rustc_driver_impl[5f75542baa940ca0]::run_compiler::{closure#1}>::{closure#0}, core[a62a0f03b43184e2]::result::Result<(), rustc_span[a628673111809004]::ErrorGuaranteed>>::{closure#0}, core[a62a0f03b43184e2]::result::Result<(), rustc_span[a628673111809004]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[a62a0f03b43184e2]::result::Result<(), rustc_span[a628673111809004]::ErrorGuaranteed>>
  44:     0x7f04dcbb7e83 - <<std[14019a58b7d275f1]::thread::Builder>::spawn_unchecked_<rustc_interface[1968ba18ecfdcdc8]::util::run_in_thread_with_globals<rustc_interface[1968ba18ecfdcdc8]::util::run_in_thread_pool_with_globals<rustc_interface[1968ba18ecfdcdc8]::interface::run_compiler<core[a62a0f03b43184e2]::result::Result<(), rustc_span[a628673111809004]::ErrorGuaranteed>, rustc_driver_impl[5f75542baa940ca0]::run_compiler::{closure#1}>::{closure#0}, core[a62a0f03b43184e2]::result::Result<(), rustc_span[a628673111809004]::ErrorGuaranteed>>::{closure#0}, core[a62a0f03b43184e2]::result::Result<(), rustc_span[a628673111809004]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[a62a0f03b43184e2]::result::Result<(), rustc_span[a628673111809004]::ErrorGuaranteed>>::{closure#1} as core[a62a0f03b43184e2]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  45:     0x7f04ddc32915 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h11dbcadb43be237a
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/alloc/src/boxed.rs:2007:9
  46:     0x7f04ddc32915 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h180b5548b3df9e0f
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/alloc/src/boxed.rs:2007:9
  47:     0x7f04ddc32915 - std::sys::unix::thread::Thread::new::thread_start::h76409cdbbbac597d
                               at /rustc/dd430bc8c22f57992ec1457a87437d14283fdd65/library/std/src/sys/unix/thread.rs:108:17
  48:     0x7f04d7aaa9eb - <unknown>
  49:     0x7f04d7b2e7cc - <unknown>
  50:                0x0 - <unknown>

[matthiaskrgr]

Hmm, duplicate of #117670
But this is beta which might have just missed the fix :(

[matthiaskrgr]

Ah the fix #117686 has already been nominated for beta, good.

[Mark-Simulacrum]

Looks like this is backported in #118492, so closing.