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ICE: type parameter impl Sized/#0 (impl Sized/#0/0) out of range when instantiating, args=[] #140500

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matthiaskrgr opened this issue Apr 30, 2025 · 1 comment
Open

ICE: type parameter impl Sized/#0 (impl Sized/#0/0) out of range when instantiating, args=[] #140500

matthiaskrgr opened this issue Apr 30, 2025 · 1 comment
Labels
C-bug Category: This is a bug. F-async_drop `#![feature(async_drop)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-incomplete-features This issue requires the use of incomplete features. S-has-bisection Status: a bisection has been found for this issue S-has-mcve Status: A Minimal Complete and Verifiable Example has been found for this issue T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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Code

#![feature(async_drop)]
use std::future::AsyncDrop;
struct a;
impl Drop for a {
    fn b() {}
}
impl AsyncDrop for a {
    fn c(d: impl Sized) {}
}
async fn bar() {
    a;
}

Meta

rustc --version --verbose:

rustc 1.88.0-nightly (74509131e 2025-04-29)
binary: rustc
commit-hash: 74509131e85a97353c67c503ea32e148a56cf4bd
commit-date: 2025-04-29
host: x86_64-unknown-linux-gnu
release: 1.88.0-nightly
LLVM version: 20.1.2

Error output

error[E0670]: `async fn` is not permitted in Rust 2015
  --> code.rs:10:1
   |
10 | async fn bar() {
   | ^^^^^ to use `async fn`, switch to Rust 2018 or later
   |
   = help: pass `--edition 2024` to `rustc`
   = note: for more on editions, read https://doc.rust-lang.org/edition-guide

error[E0407]: method `b` is not a member of trait `Drop`
 --> code.rs:5:5
  |
5 |     fn b() {}
  |     ^^^^^^^^^ not a member of trait `Drop`

error[E0407]: method `c` is not a member of trait `AsyncDrop`
 --> code.rs:8:5
  |
8 |     fn c(d: impl Sized) {}
  |     ^^^^^^^^^^^^^^^^^^^^^^ not a member of trait `AsyncDrop`

warning: the feature `async_drop` is incomplete and may not be safe to use and/or cause compiler crashes
 --> code.rs:1:12
  |
1 | #![feature(async_drop)]
  |            ^^^^^^^^^^
  |
  = note: see issue #126482 <https://github.com/rust-lang/rust/issues/126482> for more information
  = note: `#[warn(incomplete_features)]` on by default

warning: type `a` should have an upper camel case name
 --> code.rs:3:8
  |
3 | struct a;
  |        ^ help: convert the identifier to upper camel case: `A`
  |
  = note: `#[warn(non_camel_case_types)]` on by default

error[E0601]: `main` function not found in crate `code`
  --> code.rs:12:2
   |
12 | }
   |  ^ consider adding a `main` function to `code.rs`

error[E0046]: not all trait items implemented, missing: `drop`
 --> code.rs:4:1
  |
4 | impl Drop for a {
  | ^^^^^^^^^^^^^^^ missing `drop` in implementation
  |
  = help: implement the missing item: `fn drop(&mut self) { todo!() }`

error[E0046]: not all trait items implemented, missing: `drop`
 --> code.rs:7:1
  |
7 | impl AsyncDrop for a {
  | ^^^^^^^^^^^^^^^^^^^^ missing `drop` in implementation
  |
  = help: implement the missing item: `async fn drop(self: Pin<&mut Self>) { todo!() }`

warning: unused variable: `d`
 --> code.rs:8:10
  |
8 |     fn c(d: impl Sized) {}
  |          ^ help: if this is intentional, prefix it with an underscore: `_d`
  |
  = note: `#[warn(unused_variables)]` on by default


thread 'rustc' panicked at /rustc/74509131e85a97353c67c503ea32e148a56cf4bd/compiler/rustc_type_ir/src/binder.rs:745:9:
type parameter `impl Sized/#0` (impl Sized/#0/0) out of range when instantiating, args=[]
stack backtrace:
   0:     0x703acf169f33 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h940a15c10b74a984
   1:     0x703acf8059c7 - core::fmt::write::h27d0d067a83bb98d
   2:     0x703ad0c4ce91 - std::io::Write::write_fmt::h8c0aa2ff96715802
   3:     0x703acf169d92 - std::sys::backtrace::BacktraceLock::print::hbd895996714cfb75
   4:     0x703acf16dbda - std::panicking::default_hook::{{closure}}::hf8bfd53a7aa014c9
   5:     0x703acf16d75f - std::panicking::default_hook::h779fae0b10bfc65a
   6:     0x703ace1a8cb3 - std[684fc9da43124e0c]::panicking::update_hook::<alloc[df1b7aef73f2726f]::boxed::Box<rustc_driver_impl[b177b346234fa389]::install_ice_hook::{closure#1}>>::{closure#0}
   7:     0x703acf16e453 - std::panicking::rust_panic_with_hook::h0e4edc55fd8a33ac
   8:     0x703acf16e14a - std::panicking::begin_panic_handler::{{closure}}::hc69138d771aa5c8e
   9:     0x703acf16a3f9 - std::sys::backtrace::__rust_end_short_backtrace::h1ebcd854390fdb38
  10:     0x703acf16de0d - __rustc[26203448fb6e4f80]::rust_begin_unwind
  11:     0x703acba9f610 - core::panicking::panic_fmt::h4402d0abfd7c69cd
  12:     0x703ace7bef09 - <rustc_type_ir[3644b28dcac5f763]::binder::ArgFolder<rustc_middle[8ab0ab91ca03a2f2]::ty::context::TyCtxt>>::type_param_out_of_range
  13:     0x703acf838de2 - <rustc_type_ir[3644b28dcac5f763]::binder::ArgFolder<rustc_middle[8ab0ab91ca03a2f2]::ty::context::TyCtxt> as rustc_type_ir[3644b28dcac5f763]::fold::TypeFolder<rustc_middle[8ab0ab91ca03a2f2]::ty::context::TyCtxt>>::fold_ty
  14:     0x703acf834d20 - <rustc_middle[8ab0ab91ca03a2f2]::ty::Ty>::fn_sig
  15:     0x703ace9af9d2 - <rustc_mir_transform[725ac123b1b343ff]::elaborate_drop::DropCtxt<rustc_mir_transform[725ac123b1b343ff]::shim::DropShimElaborator>>::build_async_drop
  16:     0x703ad007a886 - <rustc_mir_transform[725ac123b1b343ff]::elaborate_drop::DropCtxt<rustc_mir_transform[725ac123b1b343ff]::shim::DropShimElaborator>>::elaborate_drop
  17:     0x703ad0074135 - rustc_mir_transform[725ac123b1b343ff]::shim::make_shim
  18:     0x703ad007216f - rustc_query_impl[939c91760624a63f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[939c91760624a63f]::query_impl::mir_shims::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 8usize]>>
  19:     0x703ad0072127 - <rustc_query_impl[939c91760624a63f]::query_impl::mir_shims::dynamic_query::{closure#2} as core[7a8de144660bd3c7]::ops::function::FnOnce<(rustc_middle[8ab0ab91ca03a2f2]::ty::context::TyCtxt, rustc_middle[8ab0ab91ca03a2f2]::ty::instance::InstanceKind)>>::call_once
  20:     0x703acff83b12 - rustc_query_system[6953a25049fa90fd]::query::plumbing::try_execute_query::<rustc_query_impl[939c91760624a63f]::DynamicConfig<rustc_query_system[6953a25049fa90fd]::query::caches::DefaultCache<rustc_middle[8ab0ab91ca03a2f2]::ty::instance::InstanceKind, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[939c91760624a63f]::plumbing::QueryCtxt, false>
  21:     0x703acff8382b - rustc_query_impl[939c91760624a63f]::query_impl::mir_shims::get_query_non_incr::__rust_end_short_backtrace
  22:     0x703ace8461a0 - <rustc_middle[8ab0ab91ca03a2f2]::ty::context::TyCtxt>::coroutine_layout
  23:     0x703acfeb6739 - rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of_uncached
  24:     0x703acfea5452 - rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of
  25:     0x703acfea53b6 - rustc_query_impl[939c91760624a63f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[939c91760624a63f]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 16usize]>>
  26:     0x703acfea41b3 - rustc_query_system[6953a25049fa90fd]::query::plumbing::try_execute_query::<rustc_query_impl[939c91760624a63f]::DynamicConfig<rustc_query_system[6953a25049fa90fd]::query::caches::DefaultCache<rustc_middle[8ab0ab91ca03a2f2]::ty::PseudoCanonicalInput<rustc_middle[8ab0ab91ca03a2f2]::ty::Ty>, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[939c91760624a63f]::plumbing::QueryCtxt, false>
  27:     0x703acfea3df2 - rustc_query_impl[939c91760624a63f]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  28:     0x703acfea77a4 - <core[7a8de144660bd3c7]::iter::adapters::GenericShunt<core[7a8de144660bd3c7]::iter::adapters::by_ref_sized::ByRefSized<core[7a8de144660bd3c7]::iter::adapters::map::Map<core[7a8de144660bd3c7]::slice::iter::Iter<rustc_middle[8ab0ab91ca03a2f2]::ty::VariantDef>, rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of_uncached::{closure#20}>>, core[7a8de144660bd3c7]::result::Result<core[7a8de144660bd3c7]::convert::Infallible, &rustc_middle[8ab0ab91ca03a2f2]::ty::layout::LayoutError>> as core[7a8de144660bd3c7]::iter::traits::iterator::Iterator>::next
  29:     0x703acfeab83e - rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of_uncached
  30:     0x703acfea5452 - rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of
  31:     0x703acfea53b6 - rustc_query_impl[939c91760624a63f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[939c91760624a63f]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 16usize]>>
  32:     0x703acfea41b3 - rustc_query_system[6953a25049fa90fd]::query::plumbing::try_execute_query::<rustc_query_impl[939c91760624a63f]::DynamicConfig<rustc_query_system[6953a25049fa90fd]::query::caches::DefaultCache<rustc_middle[8ab0ab91ca03a2f2]::ty::PseudoCanonicalInput<rustc_middle[8ab0ab91ca03a2f2]::ty::Ty>, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[939c91760624a63f]::plumbing::QueryCtxt, false>
  33:     0x703acfea3df2 - rustc_query_impl[939c91760624a63f]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  34:     0x703acfea7b54 - <core[7a8de144660bd3c7]::iter::adapters::GenericShunt<core[7a8de144660bd3c7]::iter::adapters::by_ref_sized::ByRefSized<core[7a8de144660bd3c7]::iter::adapters::map::Map<core[7a8de144660bd3c7]::slice::iter::Iter<rustc_middle[8ab0ab91ca03a2f2]::ty::VariantDef>, rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of_uncached::{closure#20}>>, core[7a8de144660bd3c7]::result::Result<core[7a8de144660bd3c7]::convert::Infallible, &rustc_middle[8ab0ab91ca03a2f2]::ty::layout::LayoutError>> as core[7a8de144660bd3c7]::iter::traits::iterator::Iterator>::next
  35:     0x703acfeab83e - rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of_uncached
  36:     0x703acfea5452 - rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of
  37:     0x703acfea53b6 - rustc_query_impl[939c91760624a63f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[939c91760624a63f]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 16usize]>>
  38:     0x703acfea41b3 - rustc_query_system[6953a25049fa90fd]::query::plumbing::try_execute_query::<rustc_query_impl[939c91760624a63f]::DynamicConfig<rustc_query_system[6953a25049fa90fd]::query::caches::DefaultCache<rustc_middle[8ab0ab91ca03a2f2]::ty::PseudoCanonicalInput<rustc_middle[8ab0ab91ca03a2f2]::ty::Ty>, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[939c91760624a63f]::plumbing::QueryCtxt, false>
  39:     0x703acfea3df2 - rustc_query_impl[939c91760624a63f]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  40:     0x703acfea5eac - rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of
  41:     0x703acfea53b6 - rustc_query_impl[939c91760624a63f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[939c91760624a63f]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 16usize]>>
  42:     0x703acfea41b3 - rustc_query_system[6953a25049fa90fd]::query::plumbing::try_execute_query::<rustc_query_impl[939c91760624a63f]::DynamicConfig<rustc_query_system[6953a25049fa90fd]::query::caches::DefaultCache<rustc_middle[8ab0ab91ca03a2f2]::ty::PseudoCanonicalInput<rustc_middle[8ab0ab91ca03a2f2]::ty::Ty>, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[939c91760624a63f]::plumbing::QueryCtxt, false>
  43:     0x703acfea3df2 - rustc_query_impl[939c91760624a63f]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  44:     0x703acfea31c9 - <rustc_middle[8ab0ab91ca03a2f2]::ty::layout::LayoutCx as rustc_middle[8ab0ab91ca03a2f2]::ty::layout::LayoutOf>::spanned_layout_of
  45:     0x703acf0d5bf0 - <core[7a8de144660bd3c7]::iter::adapters::GenericShunt<core[7a8de144660bd3c7]::iter::adapters::by_ref_sized::ByRefSized<core[7a8de144660bd3c7]::iter::adapters::map::Map<core[7a8de144660bd3c7]::slice::iter::Iter<rustc_middle[8ab0ab91ca03a2f2]::mir::query::CoroutineSavedTy>, rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of_uncached::{closure#12}>>, core[7a8de144660bd3c7]::result::Result<core[7a8de144660bd3c7]::convert::Infallible, &rustc_middle[8ab0ab91ca03a2f2]::ty::layout::LayoutError>> as core[7a8de144660bd3c7]::iter::traits::iterator::Iterator>::next
  46:     0x703acf0c13ca - core[7a8de144660bd3c7]::iter::adapters::try_process::<core[7a8de144660bd3c7]::iter::adapters::by_ref_sized::ByRefSized<core[7a8de144660bd3c7]::iter::adapters::map::Map<core[7a8de144660bd3c7]::slice::iter::Iter<rustc_middle[8ab0ab91ca03a2f2]::mir::query::CoroutineSavedTy>, rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of_uncached::{closure#12}>>, rustc_abi[63cb13ea47e76e19]::layout::ty::TyAndLayout<rustc_middle[8ab0ab91ca03a2f2]::ty::Ty>, core[7a8de144660bd3c7]::result::Result<core[7a8de144660bd3c7]::convert::Infallible, &rustc_middle[8ab0ab91ca03a2f2]::ty::layout::LayoutError>, <core[7a8de144660bd3c7]::iter::adapters::map::Map<core[7a8de144660bd3c7]::slice::iter::Iter<rustc_middle[8ab0ab91ca03a2f2]::mir::query::CoroutineSavedTy>, rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of_uncached::{closure#12}> as core[7a8de144660bd3c7]::iter::traits::iterator::Iterator>::try_collect<rustc_index[1de6a2bc4020dc5e]::vec::IndexVec<rustc_middle[8ab0ab91ca03a2f2]::mir::query::CoroutineSavedLocal, rustc_abi[63cb13ea47e76e19]::layout::ty::TyAndLayout<rustc_middle[8ab0ab91ca03a2f2]::ty::Ty>>>::{closure#0}, rustc_index[1de6a2bc4020dc5e]::vec::IndexVec<rustc_middle[8ab0ab91ca03a2f2]::mir::query::CoroutineSavedLocal, rustc_abi[63cb13ea47e76e19]::layout::ty::TyAndLayout<rustc_middle[8ab0ab91ca03a2f2]::ty::Ty>>>
  47:     0x703acfeb6d57 - rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of_uncached
  48:     0x703acfea5452 - rustc_ty_utils[99196f4d8095f8f1]::layout::layout_of
  49:     0x703acfea53b6 - rustc_query_impl[939c91760624a63f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[939c91760624a63f]::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 16usize]>>
  50:     0x703acfea41b3 - rustc_query_system[6953a25049fa90fd]::query::plumbing::try_execute_query::<rustc_query_impl[939c91760624a63f]::DynamicConfig<rustc_query_system[6953a25049fa90fd]::query::caches::DefaultCache<rustc_middle[8ab0ab91ca03a2f2]::ty::PseudoCanonicalInput<rustc_middle[8ab0ab91ca03a2f2]::ty::Ty>, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 16usize]>>, false, true, false>, rustc_query_impl[939c91760624a63f]::plumbing::QueryCtxt, false>
  51:     0x703acfea3df2 - rustc_query_impl[939c91760624a63f]::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
  52:     0x703ad06884c5 - <rustc_mir_transform[725ac123b1b343ff]::known_panics_lint::KnownPanicsLint as rustc_mir_transform[725ac123b1b343ff]::pass_manager::MirLint>::run_lint
  53:     0x703acf80bea7 - rustc_mir_transform[725ac123b1b343ff]::run_analysis_to_runtime_passes
  54:     0x703ad00b1965 - rustc_mir_transform[725ac123b1b343ff]::mir_drops_elaborated_and_const_checked
  55:     0x703ad00b1335 - rustc_query_impl[939c91760624a63f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[939c91760624a63f]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 8usize]>>
  56:     0x703acfafb9ac - rustc_query_system[6953a25049fa90fd]::query::plumbing::try_execute_query::<rustc_query_impl[939c91760624a63f]::DynamicConfig<rustc_data_structures[901d3a984fee3e28]::vec_cache::VecCache<rustc_span[933243e9cf7e508d]::def_id::LocalDefId, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[6953a25049fa90fd]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[939c91760624a63f]::plumbing::QueryCtxt, false>
  57:     0x703acfafb28b - rustc_query_impl[939c91760624a63f]::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
  58:     0x703ad021b4d8 - rustc_interface[6e6d2aa8af6dbcb9]::passes::run_required_analyses
  59:     0x703ad06c225e - rustc_interface[6e6d2aa8af6dbcb9]::passes::analysis
  60:     0x703ad06c2233 - rustc_query_impl[939c91760624a63f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[939c91760624a63f]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 0usize]>>
  61:     0x703ad06c7d3d - rustc_query_system[6953a25049fa90fd]::query::plumbing::try_execute_query::<rustc_query_impl[939c91760624a63f]::DynamicConfig<rustc_query_system[6953a25049fa90fd]::query::caches::SingleCache<rustc_middle[8ab0ab91ca03a2f2]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[939c91760624a63f]::plumbing::QueryCtxt, false>
  62:     0x703ad06c7a38 - rustc_query_impl[939c91760624a63f]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  63:     0x703ad07373fe - rustc_interface[6e6d2aa8af6dbcb9]::passes::create_and_enter_global_ctxt::<core[7a8de144660bd3c7]::option::Option<rustc_interface[6e6d2aa8af6dbcb9]::queries::Linker>, rustc_driver_impl[b177b346234fa389]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
  64:     0x703ad08a2c94 - rustc_interface[6e6d2aa8af6dbcb9]::interface::run_compiler::<(), rustc_driver_impl[b177b346234fa389]::run_compiler::{closure#0}>::{closure#1}
  65:     0x703ad08812b4 - std[684fc9da43124e0c]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[6e6d2aa8af6dbcb9]::util::run_in_thread_with_globals<rustc_interface[6e6d2aa8af6dbcb9]::util::run_in_thread_pool_with_globals<rustc_interface[6e6d2aa8af6dbcb9]::interface::run_compiler<(), rustc_driver_impl[b177b346234fa389]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  66:     0x703ad08816f4 - <<std[684fc9da43124e0c]::thread::Builder>::spawn_unchecked_<rustc_interface[6e6d2aa8af6dbcb9]::util::run_in_thread_with_globals<rustc_interface[6e6d2aa8af6dbcb9]::util::run_in_thread_pool_with_globals<rustc_interface[6e6d2aa8af6dbcb9]::interface::run_compiler<(), rustc_driver_impl[b177b346234fa389]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[7a8de144660bd3c7]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  67:     0x703ad0882aeb - std::sys::pal::unix::thread::Thread::new::thread_start::h207790545876e46f
  68:     0x703aca6a370a - <unknown>
  69:     0x703aca727aac - <unknown>
  70:                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: please make sure that you have updated to the latest nightly

note: please attach the file at `/home/matthias/vcs/github/CRED/rustc-ice-2025-04-30T06_10_59-2535082.txt` to your bug report

query stack during panic:
#0 [mir_shims] generating MIR shim for `core::future::async_drop::async_drop_in_place::{closure#0}`, instance=AsyncDropGlue(DefId(2:15313 ~ core[7a8d]::future::async_drop::async_drop_in_place::{closure#0}), Coroutine(DefId(2:15313 ~ core[7a8d]::future::async_drop::async_drop_in_place::{closure#0}), [a, (), core::future::ResumeTy, (), (), CoroutineWitness(DefId(2:15313 ~ core[7a8d]::future::async_drop::async_drop_in_place::{closure#0}), [a]), (*mut a,)]))
#1 [layout_of] computing layout of `{async fn body of core::future::async_drop::async_drop_in_place<a>()}`
... and 6 other queries... use `env RUST_BACKTRACE=1` to see the full query stack
error: aborting due to 6 previous errors; 3 warnings emitted

Some errors have detailed explanations: E0046, E0407, E0601, E0670.
For more information about an error, try `rustc --explain E0046`.
Backtrace 

<backtrace>

@matthiaskrgr matthiaskrgr added C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Apr 30, 2025
@rustbot rustbot added the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label Apr 30, 2025
@matthiaskrgr matthiaskrgr added the F-async_drop `#![feature(async_drop)]` label Apr 30, 2025
@jieyouxu jieyouxu removed the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label Apr 30, 2025
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moxian commented May 1, 2025

Slightly cleaner:

#![feature(async_drop)]
#![expect(incomplete_features)]
use std::future::AsyncDrop;
struct A;
impl Drop for A {
    fn drop(&mut self) {}
}
impl AsyncDrop for A {
    fn drop(_wrong: impl Sized) {}
}
async fn bar() {
    A;
}

bisects to #123948
@rustbot label: +S-has-mcve +S-has-bisection +requires-incomplete-features

@rustbot rustbot added requires-incomplete-features This issue requires the use of incomplete features. S-has-bisection Status: a bisection has been found for this issue S-has-mcve Status: A Minimal Complete and Verifiable Example has been found for this issue labels May 1, 2025
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C-bug Category: This is a bug. F-async_drop `#![feature(async_drop)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-incomplete-features This issue requires the use of incomplete features. S-has-bisection Status: a bisection has been found for this issue S-has-mcve Status: A Minimal Complete and Verifiable Example has been found for this issue T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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