tuple_fields called on non-tuple

[blasrodri]

Apologies in advance for not being able to provide a minimal snippet of the code. I'll be willing to give more info, if necessary. Bear in mind that the codebase is not open-source.

Code

<code>

Meta

rustc --version --verbose:

rustc 1.49.0-nightly (b1496c6e6 2020-10-18)
binary: rustc
commit-hash: b1496c6e606dd908dd651ac2cce89815e10d7fc5
commit-date: 2020-10-18
host: x86_64-unknown-linux-gnu
release: 1.49.0-nightly
LLVM version: 11.0

Error output

error[E0658]: use of unstable library feature 'entry_insert'
   --> api/src/node_actor.rs:147:49
    |
147 |                         m.entry(symbol.clone()).insert(price_ticker);
    |                                                 ^^^^^^
    |
    = note: see issue #65225 <https://github.com/rust-lang/rust/issues/65225> for more information
    = help: add `#![feature(entry_insert)]` to the crate attributes to enable

error[E0061]: this function takes 5 arguments but 4 arguments were supplied
   --> api/src/lib.rs:162:22
    |
162 |         tokio::spawn(NodeActor::start(pixie_channel, rx, sub, Arc::clone(&re_state)));
    |                      ^^^^^^^^^^^^^^^^ -------------  --  ---  --------------------- supplied 4 arguments
    |                      |
    |                      expected 5 arguments
    |
note: associated function defined here
   --> api/src/node_actor.rs:30:18
    |
30  |     pub async fn start(
    |                  ^^^^^
31  |         (node_tx, node_rx): (ZmqSocket, Receiver<RawMessage>),
    |         -----------------------------------------------------
32  |         mut rx: mpsc::Receiver<Envelope>,
    |         --------------------------------
33  |         sub: ZmqSocket,
    |         --------------
34  |         re_state: Arc<AtomicBool>,
    |         -------------------------
35  |         shared_tickers: crate::SharedTickers,
    |         ------------------------------------

error: internal compiler error: compiler/rustc_middle/src/ty/sty.rs:2138:18: tuple_fields called on non-tuple

note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

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 1.49.0-nightly (b1496c6e6 2020-10-18) running on x86_64-unknown-linux-gnu

note: compiler flags: -C embed-bitcode=no -C codegen-units=96 -C debuginfo=2 -C incremental --crate-type lib

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

query stack during panic:
#0 [evaluate_obligation] evaluating trait selection obligation `[closure@api/src/lib.rs:171:34: 209:6]: std::clone::Clone`
#1 [typeck] type-checking `start`
#2 [typeck_item_bodies] type-checking all item bodies
#3 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 3 previous errors; 2 warnings emitted

Some errors have detailed explanations: E0061, E0658.
For more information about an error, try `rustc --explain E0061`.
error: could not compile `api`

thread 'rustc' panicked at 'Box<Any>', compiler/rustc_errors/src/lib.rs:945:9
stack backtrace:
   0: std::panicking::begin_panic
   1: rustc_errors::HandlerInner::bug
   2: rustc_errors::Handler::bug
   3: rustc_middle::util::bug::opt_span_bug_fmt::{{closure}}
   4: rustc_middle::ty::context::tls::with_opt::{{closure}}
   5: rustc_middle::ty::context::tls::with_opt
   6: rustc_middle::util::bug::opt_span_bug_fmt
   7: rustc_middle::util::bug::bug_fmt
   8: rustc_middle::ty::sty::<impl rustc_middle::ty::TyS>::tuple_fields
   9: rustc_trait_selection::traits::select::SelectionContext::copy_clone_conditions
  10: rustc_trait_selection::traits::select::candidate_assembly::<impl rustc_trait_selection::traits::select::SelectionContext>::assemble_candidates
  11: rustc_trait_selection::traits::select::candidate_assembly::<impl rustc_trait_selection::traits::select::SelectionContext>::candidate_from_obligation_no_cache
  12: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  13: rustc_query_system::dep_graph::graph::DepGraph<K>::with_anon_task
  14: rustc_trait_selection::traits::select::candidate_assembly::<impl rustc_trait_selection::traits::select::SelectionContext>::candidate_from_obligation
  15: rustc_trait_selection::traits::select::SelectionContext::evaluate_stack
  16: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  17: rustc_query_system::dep_graph::graph::DepGraph<K>::with_anon_task
  18: rustc_trait_selection::traits::select::SelectionContext::evaluate_trait_predicate_recursively
  19: rustc_trait_selection::traits::select::SelectionContext::evaluate_predicate_recursively::{{closure}}
  20: rustc_trait_selection::traits::select::SelectionContext::evaluate_predicate_recursively
  21: rustc_infer::infer::InferCtxt::probe
  22: rustc_trait_selection::traits::select::SelectionContext::evaluate_root_obligation
  23: rustc_infer::infer::InferCtxtBuilder::enter_with_canonical
  24: rustc_traits::evaluate_obligation::evaluate_obligation
  25: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::evaluate_obligation>::compute
  26: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  27: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  28: rustc_middle::ty::query::plumbing::<impl rustc_query_system::query::QueryContext for rustc_middle::ty::context::TyCtxt>::start_query::{{closure}}::{{closure}}::{{closure}}
  29: rustc_query_system::query::plumbing::get_query_impl
  30: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt>::evaluate_obligation
  31: <rustc_infer::infer::InferCtxt as rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt>::evaluate_obligation_no_overflow
  32: rustc_trait_selection::traits::fulfill::FulfillProcessor::process_trait_obligation
  33: rustc_trait_selection::traits::fulfill::FulfillProcessor::progress_changed_obligations
  34: rustc_data_structures::obligation_forest::ObligationForest<O>::process_obligations
  35: <rustc_trait_selection::traits::fulfill::FulfillmentContext as rustc_infer::traits::engine::TraitEngine>::select_where_possible
  36: rustc_typeck::check::fn_ctxt::_impl::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::select_obligations_where_possible
  37: rustc_infer::infer::InferCtxtBuilder::enter
  38: rustc_typeck::check::typeck
  39: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::typeck>::compute
  40: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  41: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  42: rustc_data_structures::stack::ensure_sufficient_stack
  43: rustc_query_system::query::plumbing::get_query_impl
  44: rustc_query_system::query::plumbing::ensure_query_impl
  45: rustc_typeck::check::typeck_item_bodies
  46: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::typeck_item_bodies>::compute
  47: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  48: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  49: rustc_data_structures::stack::ensure_sufficient_stack
  50: rustc_query_system::query::plumbing::get_query_impl
  51: rustc_typeck::check_crate
  52: rustc_interface::passes::analysis
  53: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::analysis>::compute
  54: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  55: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  56: rustc_data_structures::stack::ensure_sufficient_stack
  57: rustc_query_system::query::plumbing::get_query_impl
  58: rustc_interface::passes::QueryContext::enter
  59: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
  60: rustc_span::with_source_map
  61: scoped_tls::ScopedKey<T>::set
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[matthiaskrgr]

duplicate of #77993

[jyn514]

Closing since this is a duplicate.