Rust compiler unexpected panic on 1.62.0-nightly

[brkydnc]

Code

impl Guest {
    async fn handle(
        guest_client: Client, 
        host_client: &mut Client,
        result: ClientListenResult,
        host: &mut Member<Self>,
        guest: &mut Member<Guest>)
    {
        // omit
    }
}

impl Lobby {
    async fn listen(mut self, mut receiver: Receiver<Client>) {
        while let ClientListenerState::Listen(mut host_client) = self.host.listener.take() {
            let guest_listen_future: OptionFuture<_> = self.guest.listener
                .client()
                .map(|client| client.move_listen())
                .into();
            
            select! {
                result = host_client.listen() => {
                    Host::handle(host_client, result, &mut self.host, &mut self.guest).await;
                }
                Some((result, guest_client)) = guest_listen_future => {
                    Guest::handle(guest_client, result, &mut self.host, &mut self.guest).await;
                }
            }
        }
    }
}

Meta

rustc --version --verbose:

rustc 1.62.0-nightly (e85edd9a8 2022-04-28)
binary: rustc
commit-hash: e85edd9a844b523a02dbd89f3c02cd13e4c9fe46
commit-date: 2022-04-28
host: x86_64-unknown-linux-gnu
release: 1.62.0-nightly
LLVM version: 14.0.1

Error output

thread 'rustc' panicked at 'index out of bounds: the len is 4 but the index is 4', compiler/rustc_typeck/src/check/fn_ctxt/checks.rs:432:35
stack backtrace:
   0:     0x7fd6d689df8d - std::backtrace_rs::backtrace::libunwind::trace::he0e523aecaf9b69a
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fd6d689df8d - std::backtrace_rs::backtrace::trace_unsynchronized::h0b3d5356c458deb9
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fd6d689df8d - std::sys_common::backtrace::_print_fmt::h532142ee1f4c3cce
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7fd6d689df8d - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h0e80dc5906b67229
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7fd6d68f9d0c - core::fmt::write::h513fcc964bdd71c0
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/core/src/fmt/mod.rs:1194:17
   5:     0x7fd6d688f681 - std::io::Write::write_fmt::h3cddf21fb8a62a54
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/io/mod.rs:1655:15
   6:     0x7fd6d68a0ca5 - std::sys_common::backtrace::_print::h0c926e8785159afb
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7fd6d68a0ca5 - std::sys_common::backtrace::print::hd5783f5f7c42c4da
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7fd6d68a0ca5 - std::panicking::default_hook::{{closure}}::h315d25e8d5d703cd
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/panicking.rs:295:22
   9:     0x7fd6d68a0919 - std::panicking::default_hook::h4301451e8ab677e5
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/panicking.rs:314:9
  10:     0x7fd6d70d0981 - rustc_driver[7ec1e2549f75ff84]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7fd6c30f4273 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h7852e00f97258d25
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/alloc/src/boxed.rs:1880:9
  12:     0x7fd6c30f322d - proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter::{{closure}}::{{closure}}::h65928c3d44bdbc45
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/proc_macro/src/bridge/client.rs:335:21
  13:     0x7fd6d68a1476 - std::panicking::rust_panic_with_hook::h9ade200275992b5b
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/panicking.rs:702:17
  14:     0x7fd6d68a1277 - std::panicking::begin_panic_handler::{{closure}}::h3460cd0d1874a7f9
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/panicking.rs:588:13
  15:     0x7fd6d689e444 - std::sys_common::backtrace::__rust_end_short_backtrace::h01570b830acaf147
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/sys_common/backtrace.rs:138:18
  16:     0x7fd6d68a0fa9 - rust_begin_unwind
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/panicking.rs:584:5
  17:     0x7fd6d68662c3 - core::panicking::panic_fmt::h188393b449504c74
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/core/src/panicking.rs:142:14
  18:     0x7fd6d6866202 - core::panicking::panic_bounds_check::hf0a31540c7c456de
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/core/src/panicking.rs:84:5
  19:     0x7fd6d745ad44 - <alloc[af6f502ea7079f55]::vec::drain_filter::DrainFilter<rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::arg_matrix::Error, <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_argument_types::{closure#4}> as core[649e541f68e0944c]::ops::drop::Drop>::drop
  20:     0x7fd6d8572568 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_argument_types
  21:     0x7fd6d853fd0e - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::confirm_builtin_call
  22:     0x7fd6d853c178 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_call
  23:     0x7fd6d85918de - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  24:     0x7fd6d855595f - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_argument_types
  25:     0x7fd6d853fd0e - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::confirm_builtin_call
  26:     0x7fd6d853c178 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_call
  27:     0x7fd6d85918de - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  28:     0x7fd6d8590720 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  29:     0x7fd6d939a3f3 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::demand_scrutinee_type
  30:     0x7fd6d858cd65 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_match
  31:     0x7fd6d8592140 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  32:     0x7fd6d8590720 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  33:     0x7fd6d857e899 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_stmt
  34:     0x7fd6d857ff10 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_block_with_expected
  35:     0x7fd6d8591a03 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  36:     0x7fd6d8590720 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  37:     0x7fd6d858d049 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_match
  38:     0x7fd6d8592140 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  39:     0x7fd6d8590720 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  40:     0x7fd6d857ff4b - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_block_with_expected
  41:     0x7fd6d8591a03 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  42:     0x7fd6d8590720 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  43:     0x7fd6d857ff4b - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_block_with_expected
  44:     0x7fd6d8591a03 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  45:     0x7fd6d8590720 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  46:     0x7fd6d8592b70 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  47:     0x7fd6d8590720 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  48:     0x7fd6d857ff4b - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_block_with_expected
  49:     0x7fd6d8594164 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  50:     0x7fd6d8590720 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  51:     0x7fd6d857f5fd - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_stmt
  52:     0x7fd6d8580634 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_block_with_expected
  53:     0x7fd6d8591a03 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  54:     0x7fd6d8590720 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  55:     0x7fd6d8592ef1 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  56:     0x7fd6d8590720 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  57:     0x7fd6d857ff4b - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_block_with_expected
  58:     0x7fd6d8591a03 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  59:     0x7fd6d8590720 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  60:     0x7fd6d85bc326 - rustc_typeck[1151d2025d9ba668]::check::check::check_fn
  61:     0x7fd6d858f473 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_closure
  62:     0x7fd6d8593763 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  63:     0x7fd6d855595f - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_argument_types
  64:     0x7fd6d853fd0e - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::confirm_builtin_call
  65:     0x7fd6d853c178 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_call
  66:     0x7fd6d85918de - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_kind
  67:     0x7fd6d8590720 - <rustc_typeck[1151d2025d9ba668]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  68:     0x7fd6d85bc326 - rustc_typeck[1151d2025d9ba668]::check::check::check_fn
  69:     0x7fd6d861a2cd - <rustc_infer[e19efdb6491ce65]::infer::InferCtxtBuilder>::enter::<&rustc_middle[ca61dcd531efc7c8]::ty::context::TypeckResults, <rustc_typeck[1151d2025d9ba668]::check::inherited::InheritedBuilder>::enter<rustc_typeck[1151d2025d9ba668]::check::typeck_with_fallback<rustc_typeck[1151d2025d9ba668]::check::typeck::{closure#0}>::{closure#1}, &rustc_middle[ca61dcd531efc7c8]::ty::context::TypeckResults>::{closure#0}>
  70:     0x7fd6d85ce9f0 - rustc_typeck[1151d2025d9ba668]::check::typeck
  71:     0x7fd6d96ca780 - <rustc_query_system[41100cafef1fb88d]::dep_graph::graph::DepGraph<rustc_middle[ca61dcd531efc7c8]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[ca61dcd531efc7c8]::ty::context::TyCtxt, rustc_span[c6bedfd0c66fb146]::def_id::LocalDefId, &rustc_middle[ca61dcd531efc7c8]::ty::context::TypeckResults>
  72:     0x7fd6d8af82f6 - rustc_query_system[41100cafef1fb88d]::query::plumbing::try_execute_query::<rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt, rustc_query_system[41100cafef1fb88d]::query::caches::DefaultCache<rustc_span[c6bedfd0c66fb146]::def_id::LocalDefId, &rustc_middle[ca61dcd531efc7c8]::ty::context::TypeckResults>>
  73:     0x7fd6d95d0631 - rustc_query_system[41100cafef1fb88d]::query::plumbing::force_query::<rustc_query_impl[46a3cb9608bcfa63]::queries::typeck, rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt>
  74:     0x7fd6d9710e7e - rustc_query_impl[46a3cb9608bcfa63]::query_callbacks::typeck::force_from_dep_node
  75:     0x7fd6d8fdd941 - <rustc_middle[ca61dcd531efc7c8]::ty::context::TyCtxt as rustc_query_system[41100cafef1fb88d]::dep_graph::DepContext>::try_force_from_dep_node
  76:     0x7fd6d8baca5e - <rustc_query_system[41100cafef1fb88d]::dep_graph::graph::DepGraph<rustc_middle[ca61dcd531efc7c8]::dep_graph::dep_node::DepKind>>::try_mark_previous_green::<rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt>
  77:     0x7fd6d8baca2c - <rustc_query_system[41100cafef1fb88d]::dep_graph::graph::DepGraph<rustc_middle[ca61dcd531efc7c8]::dep_graph::dep_node::DepKind>>::try_mark_previous_green::<rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt>
  78:     0x7fd6d8baca2c - <rustc_query_system[41100cafef1fb88d]::dep_graph::graph::DepGraph<rustc_middle[ca61dcd531efc7c8]::dep_graph::dep_node::DepKind>>::try_mark_previous_green::<rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt>
  79:     0x7fd6d8baca2c - <rustc_query_system[41100cafef1fb88d]::dep_graph::graph::DepGraph<rustc_middle[ca61dcd531efc7c8]::dep_graph::dep_node::DepKind>>::try_mark_previous_green::<rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt>
  80:     0x7fd6d8baca2c - <rustc_query_system[41100cafef1fb88d]::dep_graph::graph::DepGraph<rustc_middle[ca61dcd531efc7c8]::dep_graph::dep_node::DepKind>>::try_mark_previous_green::<rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt>
  81:     0x7fd6d8bac2e7 - <rustc_query_system[41100cafef1fb88d]::dep_graph::graph::DepGraph<rustc_middle[ca61dcd531efc7c8]::dep_graph::dep_node::DepKind>>::try_mark_green::<rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt>
  82:     0x7fd6d9640599 - rustc_query_system[41100cafef1fb88d]::query::plumbing::try_load_from_disk_and_cache_in_memory::<rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt, rustc_span[c6bedfd0c66fb146]::def_id::LocalDefId, &rustc_middle[ca61dcd531efc7c8]::mir::query::BorrowCheckResult>
  83:     0x7fd6d8af91ae - rustc_query_system[41100cafef1fb88d]::query::plumbing::try_execute_query::<rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt, rustc_query_system[41100cafef1fb88d]::query::caches::DefaultCache<rustc_span[c6bedfd0c66fb146]::def_id::LocalDefId, &rustc_middle[ca61dcd531efc7c8]::mir::query::BorrowCheckResult>>
  84:     0x7fd6d8c006ea - <rustc_query_impl[46a3cb9608bcfa63]::Queries as rustc_middle[ca61dcd531efc7c8]::ty::query::QueryEngine>::mir_borrowck
  85:     0x7fd6d86ae206 - rustc_typeck[1151d2025d9ba668]::collect::type_of::type_of
  86:     0x7fd6d8bb3937 - <rustc_query_system[41100cafef1fb88d]::dep_graph::graph::DepGraph<rustc_middle[ca61dcd531efc7c8]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[ca61dcd531efc7c8]::ty::context::TyCtxt, rustc_span[c6bedfd0c66fb146]::def_id::DefId, rustc_middle[ca61dcd531efc7c8]::ty::Ty>
  87:     0x7fd6d8b4084a - rustc_query_system[41100cafef1fb88d]::query::plumbing::get_query::<rustc_query_impl[46a3cb9608bcfa63]::queries::type_of, rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt>
  88:     0x7fd6d85b3d84 - rustc_typeck[1151d2025d9ba668]::check::check::check_item_type
  89:     0x7fd6d869f66b - <rustc_middle[ca61dcd531efc7c8]::hir::map::Map>::visit_item_likes_in_module::<rustc_typeck[1151d2025d9ba668]::check::CheckItemTypesVisitor>
  90:     0x7fd6d93b535c - rustc_typeck[1151d2025d9ba668]::check::check::check_mod_item_types
  91:     0x7fd6d96cc06f - <rustc_query_system[41100cafef1fb88d]::dep_graph::graph::DepGraph<rustc_middle[ca61dcd531efc7c8]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[ca61dcd531efc7c8]::ty::context::TyCtxt, rustc_span[c6bedfd0c66fb146]::def_id::LocalDefId, ()>
  92:     0x7fd6d8afb2fe - rustc_query_system[41100cafef1fb88d]::query::plumbing::try_execute_query::<rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt, rustc_query_system[41100cafef1fb88d]::query::caches::DefaultCache<rustc_span[c6bedfd0c66fb146]::def_id::LocalDefId, ()>>
  93:     0x7fd6d9656a43 - rustc_query_system[41100cafef1fb88d]::query::plumbing::get_query::<rustc_query_impl[46a3cb9608bcfa63]::queries::check_mod_item_types, rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt>
  94:     0x7fd6d943464d - <rustc_middle[ca61dcd531efc7c8]::hir::map::Map>::for_each_module::<rustc_typeck[1151d2025d9ba668]::check_crate::{closure#6}::{closure#0}>
  95:     0x7fd6d93fac48 - <rustc_session[881d207b34e91f9f]::session::Session>::time::<(), rustc_typeck[1151d2025d9ba668]::check_crate::{closure#6}>
  96:     0x7fd6d93cdbc3 - rustc_typeck[1151d2025d9ba668]::check_crate
  97:     0x7fd6d9150667 - rustc_interface[8b8682ff349448b4]::passes::analysis
  98:     0x7fd6d96e32b5 - <rustc_query_system[41100cafef1fb88d]::dep_graph::graph::DepGraph<rustc_middle[ca61dcd531efc7c8]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[ca61dcd531efc7c8]::ty::context::TyCtxt, (), core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>>
  99:     0x7fd6d9624ea1 - rustc_query_system[41100cafef1fb88d]::query::plumbing::try_execute_query::<rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt, rustc_query_system[41100cafef1fb88d]::query::caches::DefaultCache<(), core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>>>
 100:     0x7fd6d9665a9e - rustc_query_system[41100cafef1fb88d]::query::plumbing::get_query::<rustc_query_impl[46a3cb9608bcfa63]::queries::analysis, rustc_query_impl[46a3cb9608bcfa63]::plumbing::QueryCtxt>
 101:     0x7fd6d912bf27 - <rustc_interface[8b8682ff349448b4]::passes::QueryContext>::enter::<rustc_driver[7ec1e2549f75ff84]::run_compiler::{closure#1}::{closure#2}::{closure#3}, core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>>
 102:     0x7fd6d9116c78 - <rustc_interface[8b8682ff349448b4]::interface::Compiler>::enter::<rustc_driver[7ec1e2549f75ff84]::run_compiler::{closure#1}::{closure#2}, core[649e541f68e0944c]::result::Result<core[649e541f68e0944c]::option::Option<rustc_interface[8b8682ff349448b4]::queries::Linker>, rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>>
 103:     0x7fd6d914051f - rustc_span[c6bedfd0c66fb146]::with_source_map::<core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>, rustc_interface[8b8682ff349448b4]::interface::create_compiler_and_run<core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>, rustc_driver[7ec1e2549f75ff84]::run_compiler::{closure#1}>::{closure#1}>
 104:     0x7fd6d912a5f4 - rustc_interface[8b8682ff349448b4]::interface::create_compiler_and_run::<core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>, rustc_driver[7ec1e2549f75ff84]::run_compiler::{closure#1}>
 105:     0x7fd6d9113fb2 - <scoped_tls[3e040dd67153ed8a]::ScopedKey<rustc_span[c6bedfd0c66fb146]::SessionGlobals>>::set::<rustc_interface[8b8682ff349448b4]::interface::run_compiler<core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>, rustc_driver[7ec1e2549f75ff84]::run_compiler::{closure#1}>::{closure#0}, core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>>
 106:     0x7fd6d913ae8f - std[9bd8fc2679550d2b]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[8b8682ff349448b4]::util::run_in_thread_pool_with_globals<rustc_interface[8b8682ff349448b4]::interface::run_compiler<core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>, rustc_driver[7ec1e2549f75ff84]::run_compiler::{closure#1}>::{closure#0}, core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>>::{closure#0}, core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>>
 107:     0x7fd6d912d479 - <<std[9bd8fc2679550d2b]::thread::Builder>::spawn_unchecked_<rustc_interface[8b8682ff349448b4]::util::run_in_thread_pool_with_globals<rustc_interface[8b8682ff349448b4]::interface::run_compiler<core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>, rustc_driver[7ec1e2549f75ff84]::run_compiler::{closure#1}>::{closure#0}, core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>>::{closure#0}, core[649e541f68e0944c]::result::Result<(), rustc_errors[94fb9cd2dcbb52d6]::ErrorGuaranteed>>::{closure#1} as core[649e541f68e0944c]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
 108:     0x7fd6d68ab3c3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h1e4cdc05936d75d5
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/alloc/src/boxed.rs:1866:9
 109:     0x7fd6d68ab3c3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h627ceec73be0ad94
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/alloc/src/boxed.rs:1866:9
 110:     0x7fd6d68ab3c3 - std::sys::unix::thread::Thread::new::thread_start::hff6fe6753bb13e69
                               at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/sys/unix/thread.rs:108:17
 111:     0x7fd6d66835c2 - start_thread
 112:     0x7fd6d6708584 - __clone
 113:                0x0 - <unknown>

error: internal compiler error: unexpected panic

note: 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: rustc 1.62.0-nightly (e85edd9a8 2022-04-28) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2 -C incremental

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [typeck] type-checking `lobby::<impl at src/lobby.rs:185:1: 374:2>::listen`
#1 [mir_borrowck] borrow-checking `lobby::<impl at src/lobby.rs:185:1: 374:2>::listen`
#2 [type_of] computing type of `lobby::<impl at src/lobby.rs:185:1: 374:2>::listen::{opaque#0}`
#3 [check_mod_item_types] checking item types in module `lobby`
#4 [analysis] running analysis passes on this crate
end of query stack

Backtrace

stack backtrace:
   0: rust_begin_unwind
             at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/std/src/panicking.rs:584:5
   1: core::panicking::panic_fmt
             at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/core/src/panicking.rs:142:14
   2: core::panicking::panic_bounds_check
             at /rustc/e85edd9a844b523a02dbd89f3c02cd13e4c9fe46/library/core/src/panicking.rs:84:5
   3: <alloc::vec::drain_filter::DrainFilter<rustc_typeck::check::fn_ctxt::arg_matrix::Error, <rustc_typeck::check::fn_ctxt::FnCtxt>::check_argument_types::{closure#4}> as core::ops::drop::Drop>::drop
   4: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_argument_types
   5: <rustc_typeck::check::fn_ctxt::FnCtxt>::confirm_builtin_call
   6: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_call
   7: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
   8: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_argument_types
   9: <rustc_typeck::check::fn_ctxt::FnCtxt>::confirm_builtin_call
  10: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_call
  11: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  12: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  13: <rustc_typeck::check::fn_ctxt::FnCtxt>::demand_scrutinee_type
  14: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_match
  15: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  16: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  17: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_stmt
  18: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_block_with_expected
  19: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  20: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  21: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_match
  22: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  23: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  24: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_block_with_expected
  25: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  26: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  27: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_block_with_expected
  28: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  29: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  30: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  31: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  32: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_block_with_expected
  33: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  34: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  35: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_stmt
  36: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_block_with_expected
  37: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  38: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  39: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  40: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  41: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_block_with_expected
  42: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  43: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  44: rustc_typeck::check::check::check_fn
  45: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_closure
  46: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  47: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_argument_types
  48: <rustc_typeck::check::fn_ctxt::FnCtxt>::confirm_builtin_call
  49: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_call
  50: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_kind
  51: <rustc_typeck::check::fn_ctxt::FnCtxt>::check_expr_with_expectation
  52: rustc_typeck::check::check::check_fn
  53: <rustc_infer::infer::InferCtxtBuilder>::enter::<&rustc_middle::ty::context::TypeckResults, <rustc_typeck::check::inherited::InheritedBuilder>::enter<rustc_typeck::check::typeck_with_fallback<rustc_typeck::check::typeck::{closure#0}>::{closure#1}, &rustc_middle::ty::context::TypeckResults>::{closure#0}>
  54: rustc_typeck::check::typeck
  55: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::def_id::LocalDefId, &rustc_middle::ty::context::TypeckResults>
  56: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalDefId, &rustc_middle::ty::context::TypeckResults>>
  57: rustc_query_system::query::plumbing::force_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
  58: rustc_query_impl::query_callbacks::typeck::force_from_dep_node
  59: <rustc_middle::ty::context::TyCtxt as rustc_query_system::dep_graph::DepContext>::try_force_from_dep_node
  60: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::try_mark_previous_green::<rustc_query_impl::plumbing::QueryCtxt>
  61: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::try_mark_previous_green::<rustc_query_impl::plumbing::QueryCtxt>
  62: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::try_mark_previous_green::<rustc_query_impl::plumbing::QueryCtxt>
  63: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::try_mark_previous_green::<rustc_query_impl::plumbing::QueryCtxt>
  64: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::try_mark_previous_green::<rustc_query_impl::plumbing::QueryCtxt>
  65: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::try_mark_green::<rustc_query_impl::plumbing::QueryCtxt>
  66: rustc_query_system::query::plumbing::try_load_from_disk_and_cache_in_memory::<rustc_query_impl::plumbing::QueryCtxt, rustc_span::def_id::LocalDefId, &rustc_middle::mir::query::BorrowCheckResult>
  67: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalDefId, &rustc_middle::mir::query::BorrowCheckResult>>
  68: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::mir_borrowck
  69: rustc_typeck::collect::type_of::type_of
  70: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId, rustc_middle::ty::Ty>
  71: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::type_of, rustc_query_impl::plumbing::QueryCtxt>
  72: rustc_typeck::check::check::check_item_type
  73: <rustc_middle::hir::map::Map>::visit_item_likes_in_module::<rustc_typeck::check::CheckItemTypesVisitor>
  74: rustc_typeck::check::check::check_mod_item_types
  75: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::def_id::LocalDefId, ()>
  76: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalDefId, ()>>
  77: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::check_mod_item_types, rustc_query_impl::plumbing::QueryCtxt>
  78: <rustc_middle::hir::map::Map>::for_each_module::<rustc_typeck::check_crate::{closure#6}::{closure#0}>
  79: <rustc_session::session::Session>::time::<(), rustc_typeck::check_crate::{closure#6}>
  80: rustc_typeck::check_crate
  81: rustc_interface::passes::analysis
  82: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, (), core::result::Result<(), rustc_errors::ErrorGuaranteed>>
  83: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(), core::result::Result<(), rustc_errors::ErrorGuaranteed>>>
  84: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
  85: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#3}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
  86: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
  87: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#1}>
  88: rustc_interface::interface::create_compiler_and_run::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>
  89: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[brkydnc]

I don't exactly know how much detail I should be giving about the code. If the current snippet is not adequate, I can expose more of it.

[brkydnc]

I noticed that the handle() function's host parameter's type is wrong. It should have been host: Member<Host>, instead of Member<Self>.

async fn handle(
    guest_client: Client, 
    host_client: &mut Client,
    result: ClientListenResult,
    host: &mut Member<Self>, // This is wrong, Self = Guest
    guest: &mut Member<Guest>
) {}

async fn handle(
    guest_client: Client, 
    host_client: &mut Client,
    result: ClientListenResult,
    host: &mut Member<Host>, // This is the correct type
    guest: &mut Member<Guest>
) {}

I also noticed that I skipped the host_client: &mut Client argument in the Guest::handle() call inside the select!

// `host_client` is missing
Guest::handle(guest_client, result, &mut self.host, &mut self.guest).await;

// Fix
Guest::handle(guest_client, &mut host_client, result, &mut self.host, &mut self.guest).await;

Currently, the code has two errors. When I fix them, the code compiles straightaway. When I fix only one of them, the compiler shows me the other error, without crashing. But interestingly when I don't fix any of the errors, and leave them as they are, the compiler crashes.

[compiler-errors]

Hey @brkydnc, is there a way that you could minimize this? The code you provided is missing a ton of types and method signatures. I tried my best to reproduce your issue but I could not because I cannot guess what more than half of these methods should be taking as inputs and outputs.

[brkydnc]

Hi @compiler-errors, I'm sorry that I hadn't included a minimized version before your comment. Here is a minimized version of the code that triggers the exact same compiler bug.

struct A;
struct B;
struct C;

fn whoops(_: A, _: B, _: A) { }

fn main() {
    whoops(B, C);
}

I realized that this does not crash the compiler on newer versions, should I close this issue?

[compiler-errors]

I think this was fixed by #97303, thanks for filing the report and thanks for creating a minimization!