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ICE: `tcx.impl_defaultness(owner).has_value()`: `async_fn_in_trait` + edition 2018 #108738

Closed matthiaskrgr closed 1 year ago

matthiaskrgr commented 1 year ago

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 - ::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 - as core::ops::function::Fn>::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:: 20: 0x7f3b2c7a5f20 - ::type_of 21: 0x7f3b2ca810a5 - ::expand_opaque_ty 22: 0x7f3b2ca92f30 - >::fold_ty 23: 0x7f3b2e33bfca - rustc_middle[a17d16f63e31a3a9]::ty::util::fold_list:: as rustc_type_ir[c0b06841bed6f118]::fold::TypeFoldable>::try_fold_with::{closure#0}> 24: 0x7f3b2ca93a7b - >::super_fold_with:: 25: 0x7f3b2ca92f19 - >::fold_ty 26: 0x7f3b2ca93211 - rustc_middle[a17d16f63e31a3a9]::ty::util::fold_list:: as rustc_type_ir[c0b06841bed6f118]::fold::TypeFoldable>::try_fold_with::{closure#0}> 27: 0x7f3b2ca93a50 - >::super_fold_with:: 28: 0x7f3b2ca92f19 - >::fold_ty 29: 0x7f3b2ca80f20 - ::expand_opaque_ty 30: 0x7f3b2ca7e236 - ::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:: 33: 0x7f3b2d45053a - ::check_mod_item_types 34: 0x7f3b2d4c526f - ::for_each_module:: 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:: 38: 0x7f3b2d62790f - ::analysis 39: 0x7f3b2d453d26 - ::enter::> 40: 0x7f3b2d02a278 - rustc_span[6a5da090a89da2d0]::with_source_map::, rustc_interface[ed318880194992bd]::interface::run_compiler, rustc_driver_impl[7158e881f718e2d3]::run_compiler::{closure#1}>::{closure#0}::{closure#0}> 41: 0x7f3b2d0218fc - std[2e139e52b4ab0542]::sys_common::backtrace::__rust_begin_short_backtrace::, 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 - <::spawn_unchecked_, 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 - as core::ops::function::FnOnce>::call_once::h4c862f2350015116 at /rustc/01b7a6a9eac151f82831c402f91894552f5ca36d/library/alloc/src/boxed.rs:1987:9 44: 0x7f3b2f048593 - as core::ops::function::FnOnce>::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 - 47: 0x7f3b2ab16d90 - 48: 0x0 - 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 commented 1 year ago

cc @compiler-errors as the author of the assert in 21047f1a1c0dc1dd36c5d5a0a85d76234dd4a263