ICE: tcx.impl_defaultness(owner).has_value(): async_fn_in_trait + edition 2018

[matthiaskrgr]

Code

#![feature(async_fn_in_trait)]
#![allow(incomplete_features)]

trait MyTrait {
    async fn foo(&self) -> i32;
    async fn bar(&self) -> i32;
}

impl MyTrait for i32 {
    async fn MyTrait(&self) -> i32 {
        *self
    }

    async fn bar(&self) -> i32 {
        self.foo().await
    }
}

fn main() {}

Meta

rustc --version --verbose:

rustc 1.69.0-nightly (01b7a6a9e 2023-03-04)
binary: rustc
commit-hash: 01b7a6a9eac151f82831c402f91894552f5ca36d
commit-date: 2023-03-04
host: x86_64-unknown-linux-gnu
release: 1.69.0-nightly
LLVM version: 15.0.7

Error output

rustc file.rs --edition=2018

error[E0407]: method `MyTrait` is not a member of trait `MyTrait`
  --> 37b51aa64d02aa93e235707c812d00fb55d9e6aa.rs:10:5
   |
10 | /     async fn MyTrait(&self) -> i32 {
11 | |         *self
12 | |     }
   | |_____^ not a member of trait `MyTrait`

error[E0046]: not all trait items implemented, missing: `foo`
 --> 37b51aa64d02aa93e235707c812d00fb55d9e6aa.rs:9:1
  |
5 |     async fn foo(&self) -> i32;
  |     --------------------------- `foo` from trait
...
9 | impl MyTrait for i32 {
  | ^^^^^^^^^^^^^^^^^^^^ missing `foo` in implementation

Backtrace

thread 'rustc' panicked at 'assertion failed: tcx.impl_defaultness(owner).has_value()', compiler/rustc_hir_analysis/src/collect/type_of.rs:348:25
stack backtrace:
   0:     0x7f3b2f03b31a - std::backtrace_rs::backtrace::libunwind::trace::h52636c4d9c9717bd
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f3b2f03b31a - std::backtrace_rs::backtrace::trace_unsynchronized::h0c9293a5a7ee6340
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f3b2f03b31a - std::sys_common::backtrace::_print_fmt::h3fb44919aa13b5cf
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f3b2f03b31a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h3562293febed6b19
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f3b2f09eb6e - core::fmt::write::h12118b6f3c7d6b90
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/core/src/fmt/mod.rs:1232:17
   5:     0x7f3b2f02e1c5 - std::io::Write::write_fmt::h28efec1b4660b932
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/io/mod.rs:1684:15
   6:     0x7f3b2f03b0e5 - std::sys_common::backtrace::_print::h5d889ef4ebb9a8ec
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7f3b2f03b0e5 - std::sys_common::backtrace::print::hbf11bbbbeb490fd5
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7f3b2f03de5f - std::panicking::default_hook::{{closure}}::hcc41717939974e11
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/panicking.rs:271:22
   9:     0x7f3b2f03db9b - std::panicking::default_hook::h4ecb5f08729b0e24
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/panicking.rs:290:9
  10:     0x7f3b2ddc8195 - rustc_driver_impl[7158e881f718e2d3]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7f3b2f03e69d - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hdc6e44f7d2d41bd2
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/alloc/src/boxed.rs:2001:9
  12:     0x7f3b2f03e69d - std::panicking::rust_panic_with_hook::h0d378bbed8eb51b5
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/panicking.rs:696:13
  13:     0x7f3b2f03e3d2 - std::panicking::begin_panic_handler::{{closure}}::hea4ab4df23767250
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/panicking.rs:581:13
  14:     0x7f3b2f03b786 - std::sys_common::backtrace::__rust_end_short_backtrace::hccdf8f718a4a058e
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/sys_common/backtrace.rs:150:18
  15:     0x7f3b2f03e122 - rust_begin_unwind
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/panicking.rs:579:5
  16:     0x7f3b2f09aec3 - core::panicking::panic_fmt::h83261bf20a650427
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/core/src/panicking.rs:64:14
  17:     0x7f3b2f09af5d - core::panicking::panic::hdff1c0e7b0c7538b
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/core/src/panicking.rs:114:5
  18:     0x7f3b2d3365ea - rustc_hir_analysis[6e726a01f7b04994]::collect::type_of::type_of
  19:     0x7f3b2c7a7320 - rustc_query_system[78587c5ed3869d71]::query::plumbing::try_execute_query::<rustc_query_impl[f5966daa0ba4a556]::queries::type_of, rustc_query_impl[f5966daa0ba4a556]::plumbing::QueryCtxt>
  20:     0x7f3b2c7a5f20 - <rustc_query_impl[f5966daa0ba4a556]::Queries as rustc_middle[a17d16f63e31a3a9]::ty::query::QueryEngine>::type_of
  21:     0x7f3b2ca810a5 - <rustc_middle[a17d16f63e31a3a9]::ty::util::OpaqueTypeExpander>::expand_opaque_ty
  22:     0x7f3b2ca92f30 - <rustc_middle[a17d16f63e31a3a9]::ty::util::OpaqueTypeExpander as rustc_type_ir[c0b06841bed6f118]::fold::TypeFolder<rustc_middle[a17d16f63e31a3a9]::ty::context::TyCtxt>>::fold_ty
  23:     0x7f3b2e33bfca - rustc_middle[a17d16f63e31a3a9]::ty::util::fold_list::<rustc_middle[a17d16f63e31a3a9]::ty::util::OpaqueTypeExpander, rustc_middle[a17d16f63e31a3a9]::ty::Ty, <&rustc_middle[a17d16f63e31a3a9]::ty::list::List<rustc_middle[a17d16f63e31a3a9]::ty::Ty> as rustc_type_ir[c0b06841bed6f118]::fold::TypeFoldable<rustc_middle[a17d16f63e31a3a9]::ty::context::TyCtxt>>::try_fold_with<rustc_middle[a17d16f63e31a3a9]::ty::util::OpaqueTypeExpander>::{closure#0}>
  24:     0x7f3b2ca93a7b - <rustc_middle[a17d16f63e31a3a9]::ty::Ty as rustc_type_ir[c0b06841bed6f118]::fold::TypeSuperFoldable<rustc_middle[a17d16f63e31a3a9]::ty::context::TyCtxt>>::super_fold_with::<rustc_middle[a17d16f63e31a3a9]::ty::util::OpaqueTypeExpander>
  25:     0x7f3b2ca92f19 - <rustc_middle[a17d16f63e31a3a9]::ty::util::OpaqueTypeExpander as rustc_type_ir[c0b06841bed6f118]::fold::TypeFolder<rustc_middle[a17d16f63e31a3a9]::ty::context::TyCtxt>>::fold_ty
  26:     0x7f3b2ca93211 - rustc_middle[a17d16f63e31a3a9]::ty::util::fold_list::<rustc_middle[a17d16f63e31a3a9]::ty::util::OpaqueTypeExpander, rustc_middle[a17d16f63e31a3a9]::ty::subst::GenericArg, <&rustc_middle[a17d16f63e31a3a9]::ty::list::List<rustc_middle[a17d16f63e31a3a9]::ty::subst::GenericArg> as rustc_type_ir[c0b06841bed6f118]::fold::TypeFoldable<rustc_middle[a17d16f63e31a3a9]::ty::context::TyCtxt>>::try_fold_with<rustc_middle[a17d16f63e31a3a9]::ty::util::OpaqueTypeExpander>::{closure#0}>
  27:     0x7f3b2ca93a50 - <rustc_middle[a17d16f63e31a3a9]::ty::Ty as rustc_type_ir[c0b06841bed6f118]::fold::TypeSuperFoldable<rustc_middle[a17d16f63e31a3a9]::ty::context::TyCtxt>>::super_fold_with::<rustc_middle[a17d16f63e31a3a9]::ty::util::OpaqueTypeExpander>
  28:     0x7f3b2ca92f19 - <rustc_middle[a17d16f63e31a3a9]::ty::util::OpaqueTypeExpander as rustc_type_ir[c0b06841bed6f118]::fold::TypeFolder<rustc_middle[a17d16f63e31a3a9]::ty::context::TyCtxt>>::fold_ty
  29:     0x7f3b2ca80f20 - <rustc_middle[a17d16f63e31a3a9]::ty::util::OpaqueTypeExpander>::expand_opaque_ty
  30:     0x7f3b2ca7e236 - <rustc_middle[a17d16f63e31a3a9]::ty::context::TyCtxt>::try_expand_impl_trait_type
  31:     0x7f3b2ca5beb9 - rustc_hir_analysis[6e726a01f7b04994]::check::check::check_mod_item_types
  32:     0x7f3b2d450991 - rustc_query_system[78587c5ed3869d71]::query::plumbing::try_execute_query::<rustc_query_impl[f5966daa0ba4a556]::queries::check_mod_item_types, rustc_query_impl[f5966daa0ba4a556]::plumbing::QueryCtxt>
  33:     0x7f3b2d45053a - <rustc_query_impl[f5966daa0ba4a556]::Queries as rustc_middle[a17d16f63e31a3a9]::ty::query::QueryEngine>::check_mod_item_types
  34:     0x7f3b2d4c526f - <rustc_middle[a17d16f63e31a3a9]::hir::map::Map>::for_each_module::<rustc_hir_analysis[6e726a01f7b04994]::check_crate::{closure#6}::{closure#0}>
  35:     0x7f3b2c121188 - rustc_hir_analysis[6e726a01f7b04994]::check_crate
  36:     0x7f3b2c115482 - rustc_interface[ed318880194992bd]::passes::analysis
  37:     0x7f3b2d627c0d - rustc_query_system[78587c5ed3869d71]::query::plumbing::try_execute_query::<rustc_query_impl[f5966daa0ba4a556]::queries::analysis, rustc_query_impl[f5966daa0ba4a556]::plumbing::QueryCtxt>
  38:     0x7f3b2d62790f - <rustc_query_impl[f5966daa0ba4a556]::Queries as rustc_middle[a17d16f63e31a3a9]::ty::query::QueryEngine>::analysis
  39:     0x7f3b2d453d26 - <rustc_middle[a17d16f63e31a3a9]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[7158e881f718e2d3]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[389485506588c7bd]::result::Result<(), rustc_span[6a5da090a89da2d0]::ErrorGuaranteed>>
  40:     0x7f3b2d02a278 - rustc_span[6a5da090a89da2d0]::with_source_map::<core[389485506588c7bd]::result::Result<(), rustc_span[6a5da090a89da2d0]::ErrorGuaranteed>, rustc_interface[ed318880194992bd]::interface::run_compiler<core[389485506588c7bd]::result::Result<(), rustc_span[6a5da090a89da2d0]::ErrorGuaranteed>, rustc_driver_impl[7158e881f718e2d3]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  41:     0x7f3b2d0218fc - std[2e139e52b4ab0542]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[ed318880194992bd]::util::run_in_thread_pool_with_globals<rustc_interface[ed318880194992bd]::interface::run_compiler<core[389485506588c7bd]::result::Result<(), rustc_span[6a5da090a89da2d0]::ErrorGuaranteed>, rustc_driver_impl[7158e881f718e2d3]::run_compiler::{closure#1}>::{closure#0}, core[389485506588c7bd]::result::Result<(), rustc_span[6a5da090a89da2d0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[389485506588c7bd]::result::Result<(), rustc_span[6a5da090a89da2d0]::ErrorGuaranteed>>
  42:     0x7f3b2d02132a - <<std[2e139e52b4ab0542]::thread::Builder>::spawn_unchecked_<rustc_interface[ed318880194992bd]::util::run_in_thread_pool_with_globals<rustc_interface[ed318880194992bd]::interface::run_compiler<core[389485506588c7bd]::result::Result<(), rustc_span[6a5da090a89da2d0]::ErrorGuaranteed>, rustc_driver_impl[7158e881f718e2d3]::run_compiler::{closure#1}>::{closure#0}, core[389485506588c7bd]::result::Result<(), rustc_span[6a5da090a89da2d0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[389485506588c7bd]::result::Result<(), rustc_span[6a5da090a89da2d0]::ErrorGuaranteed>>::{closure#1} as core[389485506588c7bd]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  43:     0x7f3b2f048593 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h4c862f2350015116
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/alloc/src/boxed.rs:1987:9
  44:     0x7f3b2f048593 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h72ad187333787d1e
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/alloc/src/boxed.rs:1987:9
  45:     0x7f3b2f048593 - std::sys::unix::thread::Thread::new::thread_start::hf092d8eb46236b01
                               at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/std/src/sys/unix/thread.rs:108:17
  46:     0x7f3b2aa94bb5 - <unknown>
  47:     0x7f3b2ab16d90 - <unknown>
  48:                0x0 - <unknown>

error: 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 (01b7a6a9e 2023-03-04) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [type_of] computing type of `MyTrait::foo::{opaque#0}`
#1 [check_mod_item_types] checking item types in top-level module
#2 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 2 previous errors

Some errors have detailed explanations: E0046, E0407.
For more information about an error, try `rustc --explain E0046`.

[matthiaskrgr]

cc @compiler-errors as the author of the assert in 21047f1