TypeError ICE with hashmap of async function pointers

[0xAda]

Code

use std::collections::HashMap;
use std::future::Future;
use std::pin::Pin;
use async_trait::async_trait;

#[async_trait]
pub trait Trait {
    async fn do_something(byte: u8);
}

pub struct Struct;

#[async_trait]
impl Trait for Struct {
    async fn do_something(byte: u8) {

    }
}

pub struct Map {
    map: HashMap<u16, fn(u8) -> Pin<Box<dyn Future<Output = ()> + Send>>>,
}

impl Map {
    pub fn new() -> Self {
        let mut map = HashMap::new();
        map.insert(1, Struct::do_something);
        Self {
            map,
        }
    }
}

Meta

rustc --version --verbose:

rustc 1.69.0-nightly (e1eaa2d5d 2023-02-06)
binary: rustc
commit-hash: e1eaa2d5d4d1f5b7b89561a940718058d414e89c
commit-date: 2023-02-06
host: x86_64-unknown-linux-gnu
release: 1.69.0-nightly
LLVM version: 15.0.7

Error output

error: internal compiler error: no errors encountered even though `delay_span_bug` issued

error: internal compiler error: `TypeError` when attempting coercion but no error emitted

Backtrace

query stack during panic:
#0 [typeck] type-checking `<impl at src/lib.rs:24:1: 24:27>::new`
#1 [typeck_item_bodies] type-checking all item bodies
#2 [analysis] running analysis passes on this crate
end of query stack
error: internal compiler error: no errors encountered even though `delay_span_bug` issued

error: internal compiler error: `TypeError` when attempting coercion but no error emitted
  --> src/lib.rs:29:13
   |
29 |             map,
   |             ^^^
   |
   = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
              1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
              2: <rustc_hir_typeck::fn_ctxt::FnCtxt>::demand_coerce_diag
              3: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_struct_fields
              4: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
              5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
              6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
              7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
              8: rustc_hir_typeck::check::check_fn
              9: rustc_hir_typeck::typeck
             10: <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::typeck_results::TypeckResults>
             11: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
             12: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
             13: rustc_hir_typeck::typeck_item_bodies
             14: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, (), ()>
             15: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
             16: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
             17: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
             18: rustc_hir_analysis::check_crate
             19: rustc_interface::passes::analysis
             20: <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>>
             21: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
             22: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
             23: <rustc_interface::passes::QueryContext>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#3}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
             24: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
             25: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             26: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
             27: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
             28: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             29: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/e1eaa2d5d4d1f5b7b89561a940718058d414e89c/library/alloc/src/boxed.rs:1988:9
             30: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/e1eaa2d5d4d1f5b7b89561a940718058d414e89c/library/alloc/src/boxed.rs:1988:9
             31: std::sys::unix::thread::Thread::new::thread_start
                        at /rustc/e1eaa2d5d4d1f5b7b89561a940718058d414e89c/library/std/src/sys/unix/thread.rs:108:17
             32: <unknown>
             33: <unknown>
           

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 1.69.0-nightly (e1eaa2d5d 2023-02-06) running on x86_64-unknown-linux-gnu

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

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

query stack during panic:
end of query stack
thread panicked while panicking. aborting.

[matthiaskrgr]

Is this related to #107428 ?

[compiler-errors]

Nope

[matthiaskrgr]

Ooh I misread the Typerror ice, my bad 🙃

[compiler-errors]

No big deal, this has to do with a lock (well, refcell) being held in hir typeck, if you're curious