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ICE: broken MIR in AsyncDropGlue( #141761

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#142347
Open
ICE: broken MIR in AsyncDropGlue(#141761
#142347
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C-bugCategory: This is a bug.F-async_drop`#![feature(async_drop)]`I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
@matthiaskrgr

Description

@matthiaskrgr
matthiaskrgr
opened on May 30, 2025

Code

//@ compile-flags: --edition=2024 -Zlint-mir

#![feature(async_drop)]
type BoxFuture<T> = std::pin::Pin<Box<dyn Future<Output = T>>>;
fn main() {}
async fn f() {
    run("").await
}
struct InMemoryStorage;
struct User<'dep> {
    dep: &'dep str,
}
impl<'a> StorageRequest<InMemoryStorage> for SaveUser<'a> {
    fn execute(&self) -> BoxFuture<Result<(), String>> {
        todo!()
    }
}
trait Storage {
    type Error;
}
impl Storage for InMemoryStorage {
    type Error = String;
}
trait StorageRequestReturnType {
    type Output;
}
trait StorageRequest<S: Storage>: StorageRequestReturnType {
    fn execute(&self) -> BoxFuture<Result<<Self>::Output, S::Error>>;
}
struct SaveUser<'a> {
    name: &'a str,
}
impl<'a> StorageRequestReturnType for SaveUser<'a> {
    type Output = ();
}
impl<'dep> User<'dep> {
    async fn save<S>(self)
    where
        S: Storage,
        for<'a> SaveUser<'a>: StorageRequest<S>,
    {
        SaveUser { name: "" }.execute().await;
    }
}
async fn run<S>(dep: &str)
where
    S: Storage,
    for<'a> SaveUser<'a>: StorageRequest<S>,
{
    User { dep }.save().await
}

Meta

rustc --version --verbose:

rustc 1.89.0-nightly (1bbd62e54 2025-05-29)
binary: rustc
commit-hash: 1bbd62e547ba5cc08ccb44c27def3d33195d2dd5
commit-date: 2025-05-29
host: x86_64-unknown-linux-gnu
release: 1.89.0-nightly
LLVM version: 20.1.5

Error output

warning: the feature `async_drop` is incomplete and may not be safe to use and/or cause compiler crashes
 --> code.rs:3:12
  |
3 | #![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 alias `BoxFuture` is never used
 --> code.rs:4:6
  |
4 | type BoxFuture<T> = std::pin::Pin<Box<dyn Future<Output = T>>>;
  |      ^^^^^^^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: function `f` is never used
 --> code.rs:6:10
  |
6 | async fn f() {
  |          ^

warning: struct `InMemoryStorage` is never constructed
 --> code.rs:9:8
  |
9 | struct InMemoryStorage;
  |        ^^^^^^^^^^^^^^^

warning: struct `User` is never constructed
  --> code.rs:10:8
   |
10 | struct User<'dep> {
   |        ^^^^

warning: trait `Storage` is never used
  --> code.rs:18:7
   |
18 | trait Storage {
   |       ^^^^^^^

warning: trait `StorageRequestReturnType` is never used
  --> code.rs:24:7
   |
24 | trait StorageRequestReturnType {
   |       ^^^^^^^^^^^^^^^^^^^^^^^^

warning: trait `StorageRequest` is never used
  --> code.rs:27:7
   |
27 | trait StorageRequest<S: Storage>: StorageRequestReturnType {
   |       ^^^^^^^^^^^^^^

warning: struct `SaveUser` is never constructed
  --> code.rs:30:8
   |
30 | struct SaveUser<'a> {
   |        ^^^^^^^^

warning: method `save` is never used
  --> code.rs:37:14
   |
36 | impl<'dep> User<'dep> {
   | --------------------- method in this implementation
37 |     async fn save<S>(self)
   |              ^^^^

warning: function `run` is never used
  --> code.rs:45:10
   |
45 | async fn run<S>(dep: &str)
   |          ^^^

warning: unused `Result` that must be used
  --> code.rs:42:9
   |
42 |         SaveUser { name: "" }.execute().await;
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this `Result` may be an `Err` variant, which should be handled
   = note: `#[warn(unused_must_use)]` on by default
help: use `let _ = ...` to ignore the resulting value
   |
42 |         let _ = SaveUser { name: "" }.execute().await;
   |         +++++++

warning: 12 warnings emitted
Backtrace 

note: no errors encountered even though delayed bugs were created

note: those delayed bugs will now be shown as internal compiler errors

error: internal compiler error: broken MIR in Item(DefId(0:8 ~ code[a16f]::f::{closure#0})) (after pass AbortUnwindingCalls) at bb21[0]:
                                StorageLive(_56) which already has storage here
 --> code.rs:6:14
  |
6 |   async fn f() {
  |  ______________^
7 | |     run("").await
8 | | }
  | |_^
  |
note: delayed at compiler/rustc_mir_transform/src/lint.rs:96:26
         0: <rustc_errors::DiagCtxtInner>::emit_diagnostic
         1: <rustc_errors::DiagCtxtHandle>::emit_diagnostic
         2: <rustc_span::ErrorGuaranteed as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
         3: <rustc_errors::DiagCtxtHandle>::span_delayed_bug::<rustc_span::span_encoding::Span, alloc::string::String>
         4: <rustc_mir_transform::lint::Lint>::fail::<alloc::string::String>
         5: <rustc_mir_transform::lint::Lint as rustc_middle::mir::visit::Visitor>::visit_statement
         6: rustc_mir_transform::lint::lint_body
         7: rustc_mir_transform::pass_manager::run_passes_inner
         8: <rustc_mir_transform::coroutine::StateTransform as rustc_mir_transform::pass_manager::MirPass>::run_pass
         9: rustc_mir_transform::run_analysis_to_runtime_passes
        10: rustc_mir_transform::mir_drops_elaborated_and_const_checked
        11: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
        12: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_data_structures::vec_cache::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        13: rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
        14: rustc_mir_transform::optimized_mir
        15: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
        16: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefIdCache<rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        17: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
        18: <rustc_middle::ty::context::TyCtxt>::coroutine_layout
        19: rustc_ty_utils::layout::layout_of_uncached
        20: rustc_ty_utils::layout::layout_of
        21: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        23: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        24: <rustc_mir_transform::known_panics_lint::KnownPanicsLint as rustc_mir_transform::pass_manager::MirLint>::run_lint
        25: rustc_mir_transform::run_analysis_to_runtime_passes
        26: rustc_mir_transform::mir_drops_elaborated_and_const_checked
        27: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
        28: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_data_structures::vec_cache::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        29: rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
        30: rustc_interface::passes::run_required_analyses
        31: rustc_interface::passes::analysis
        32: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 0]>>
        33: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        34: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
        35: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
        36: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
        37: std::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
        38: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
        39: std::sys::pal::unix::thread::Thread::new::thread_start
        40: <unknown>
        41: <unknown>
 --> code.rs:6:14
  |
6 |   async fn f() {
  |  ______________^
7 | |     run("").await
8 | | }
  | |_^

error: internal compiler error: broken MIR in Item(DefId(0:8 ~ code[a16f]::f::{closure#0})) (after pass AbortUnwindingCalls) at bb4[2]:
                                local _47 still has storage when returning from function
 --> code.rs:6:14
  |
6 |   async fn f() {
  |  ______________^
7 | |     run("").await
8 | | }
  | |_^
  |
note: delayed at compiler/rustc_mir_transform/src/lint.rs:115:34
         0: <rustc_errors::DiagCtxtInner>::emit_diagnostic
         1: <rustc_errors::DiagCtxtHandle>::emit_diagnostic
         2: <rustc_span::ErrorGuaranteed as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
         3: <rustc_errors::DiagCtxtHandle>::span_delayed_bug::<rustc_span::span_encoding::Span, alloc::string::String>
         4: <rustc_mir_transform::lint::Lint>::fail::<alloc::string::String>
         5: <rustc_mir_transform::lint::Lint as rustc_middle::mir::visit::Visitor>::visit_terminator
         6: rustc_mir_transform::lint::lint_body
         7: rustc_mir_transform::pass_manager::run_passes_inner
         8: <rustc_mir_transform::coroutine::StateTransform as rustc_mir_transform::pass_manager::MirPass>::run_pass
         9: rustc_mir_transform::run_analysis_to_runtime_passes
        10: rustc_mir_transform::mir_drops_elaborated_and_const_checked
        11: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
        12: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_data_structures::vec_cache::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        13: rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
        14: rustc_mir_transform::optimized_mir
        15: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
        16: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefIdCache<rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        17: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
        18: <rustc_middle::ty::context::TyCtxt>::coroutine_layout
        19: rustc_ty_utils::layout::layout_of_uncached
        20: rustc_ty_utils::layout::layout_of
        21: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        23: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        24: <rustc_mir_transform::known_panics_lint::KnownPanicsLint as rustc_mir_transform::pass_manager::MirLint>::run_lint
        25: rustc_mir_transform::run_analysis_to_runtime_passes
        26: rustc_mir_transform::mir_drops_elaborated_and_const_checked
        27: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
        28: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_data_structures::vec_cache::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        29: rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
        30: rustc_interface::passes::run_required_analyses
        31: rustc_interface::passes::analysis
        32: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 0]>>
        33: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        34: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
        35: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
        36: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
        37: std::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
        38: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
        39: std::sys::pal::unix::thread::Thread::new::thread_start
        40: <unknown>
        41: <unknown>
 --> code.rs:6:14
  |
6 |   async fn f() {
  |  ______________^
7 | |     run("").await
8 | | }
  | |_^
...
...
...
...
...
error: internal compiler error: broken MIR in AsyncDropGlue(DefId(2:15392 ~ core[50b5]::future::async_drop::async_drop_in_place::{closure#0}), Coroutine(DefId(2:15392 ~ core[50b5]::future::async_drop::async_drop_in_place::{closure#0}), [std::result::Result<(), std::string::String>, (), std::future::ResumeTy, (), (), CoroutineWitness(DefId(2:15392 ~ core[50b5]::future::async_drop::async_drop_in_place::{closure#0}), [std::result::Result<(), std::string::String>]), (*mut std::result::Result<(), std::string::String>,)])) (after pass AbortUnwindingCalls) at bb6[0]:
                                StorageLive(_26) which already has storage here
  --> /home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/async_drop.rs:46:70
   |
46 |   pub async unsafe fn async_drop_in_place<T: ?Sized>(_to_drop: *mut T) {
   |  ______________________________________________________________________^
...  |
49 | | }
   | |_^
   |
note: delayed at compiler/rustc_mir_transform/src/lint.rs:96:26
         0: <rustc_errors::DiagCtxtInner>::emit_diagnostic
         1: <rustc_errors::DiagCtxtHandle>::emit_diagnostic
         2: <rustc_span::ErrorGuaranteed as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
         3: <rustc_errors::DiagCtxtHandle>::span_delayed_bug::<rustc_span::span_encoding::Span, alloc::string::String>
         4: <rustc_mir_transform::lint::Lint>::fail::<alloc::string::String>
         5: <rustc_mir_transform::lint::Lint as rustc_middle::mir::visit::Visitor>::visit_statement
         6: rustc_mir_transform::lint::lint_body
         7: rustc_mir_transform::pass_manager::run_passes_inner
         8: <rustc_mir_transform::coroutine::StateTransform as rustc_mir_transform::pass_manager::MirPass>::run_pass
         9: rustc_mir_transform::pass_manager::run_passes_inner
        10: rustc_mir_transform::shim::make_shim
        11: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::mir_shims::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
        12: <rustc_query_impl::query_impl::mir_shims::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_middle::ty::instance::InstanceKind)>>::call_once
        13: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::instance::InstanceKind, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        14: rustc_query_impl::query_impl::mir_shims::get_query_non_incr::__rust_end_short_backtrace
        15: <rustc_middle::ty::context::TyCtxt>::coroutine_layout
        16: rustc_ty_utils::layout::layout_of_uncached
        17: rustc_ty_utils::layout::layout_of
        18: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        19: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        20: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        21: rustc_ty_utils::layout::layout_of_uncached
        22: rustc_ty_utils::layout::layout_of
        23: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        24: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        25: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        26: rustc_ty_utils::layout::layout_of_uncached
        27: rustc_ty_utils::layout::layout_of
        28: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        29: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        30: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        31: rustc_ty_utils::layout::layout_of
        32: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        33: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        34: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        35: <rustc_middle::ty::layout::LayoutCx as rustc_middle::ty::layout::LayoutOf>::spanned_layout_of
        36: <core::iter::adapters::GenericShunt<core::iter::adapters::by_ref_sized::ByRefSized<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}>>, core::result::Result<core::convert::Infallible, &rustc_middle::ty::layout::LayoutError>> as core::iter::traits::iterator::Iterator>::next
        37: core::iter::adapters::try_process::<core::iter::adapters::by_ref_sized::ByRefSized<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}>>, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>, core::result::Result<core::convert::Infallible, &rustc_middle::ty::layout::LayoutError>, <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}> as core::iter::traits::iterator::Iterator>::try_collect<rustc_index::vec::IndexVec<rustc_middle::mir::query::CoroutineSavedLocal, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>>>::{closure#0}, rustc_index::vec::IndexVec<rustc_middle::mir::query::CoroutineSavedLocal, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>>>
        38: rustc_ty_utils::layout::layout_of_uncached
        39: rustc_ty_utils::layout::layout_of
        40: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        41: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        42: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        43: rustc_ty_utils::layout::layout_of_uncached
        44: rustc_ty_utils::layout::layout_of
        45: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        46: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        47: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        48: rustc_ty_utils::layout::layout_of_uncached
        49: rustc_ty_utils::layout::layout_of
        50: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        51: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        52: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        53: <rustc_middle::ty::layout::LayoutCx as rustc_middle::ty::layout::LayoutOf>::spanned_layout_of
        54: <core::iter::adapters::GenericShunt<core::iter::adapters::by_ref_sized::ByRefSized<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}>>, core::result::Result<core::convert::Infallible, &rustc_middle::ty::layout::LayoutError>> as core::iter::traits::iterator::Iterator>::next
        55: core::iter::adapters::try_process::<core::iter::adapters::by_ref_sized::ByRefSized<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}>>, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>, core::result::Result<core::convert::Infallible, &rustc_middle::ty::layout::LayoutError>, <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}> as core::iter::traits::iterator::Iterator>::try_collect<rustc_index::vec::IndexVec<rustc_middle::mir::query::CoroutineSavedLocal, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>>>::{closure#0}, rustc_index::vec::IndexVec<rustc_middle::mir::query::CoroutineSavedLocal, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>>>
        56: rustc_ty_utils::layout::layout_of_uncached
        57: rustc_ty_utils::layout::layout_of
        58: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        59: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        60: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        61: rustc_ty_utils::layout::layout_of_uncached
        62: rustc_ty_utils::layout::layout_of
        63: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        64: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        65: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        66: rustc_ty_utils::layout::layout_of_uncached
        67: rustc_ty_utils::layout::layout_of
        68: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        69: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        70: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        71: <rustc_middle::ty::layout::LayoutCx as rustc_middle::ty::layout::LayoutOf>::spanned_layout_of
        72: <core::iter::adapters::GenericShunt<core::iter::adapters::by_ref_sized::ByRefSized<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}>>, core::result::Result<core::convert::Infallible, &rustc_middle::ty::layout::LayoutError>> as core::iter::traits::iterator::Iterator>::next
        73: core::iter::adapters::try_process::<core::iter::adapters::by_ref_sized::ByRefSized<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}>>, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>, core::result::Result<core::convert::Infallible, &rustc_middle::ty::layout::LayoutError>, <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}> as core::iter::traits::iterator::Iterator>::try_collect<rustc_index::vec::IndexVec<rustc_middle::mir::query::CoroutineSavedLocal, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>>>::{closure#0}, rustc_index::vec::IndexVec<rustc_middle::mir::query::CoroutineSavedLocal, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>>>
        74: rustc_ty_utils::layout::layout_of_uncached
        75: rustc_ty_utils::layout::layout_of
        76: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        77: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        78: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        79: <rustc_mir_transform::known_panics_lint::KnownPanicsLint as rustc_mir_transform::pass_manager::MirLint>::run_lint
        80: rustc_mir_transform::run_analysis_to_runtime_passes
        81: rustc_mir_transform::mir_drops_elaborated_and_const_checked
        82: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
        83: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_data_structures::vec_cache::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        84: rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
        85: rustc_interface::passes::run_required_analyses
        86: rustc_interface::passes::analysis
        87: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 0]>>
        88: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        89: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
        90: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
        91: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
        92: std::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
        93: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
        94: std::sys::pal::unix::thread::Thread::new::thread_start
        95: <unknown>
        96: <unknown>
  --> /home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/async_drop.rs:46:70
   |
46 |   pub async unsafe fn async_drop_in_place<T: ?Sized>(_to_drop: *mut T) {
   |  ______________________________________________________________________^
...  |
49 | | }
   | |_^

error: internal compiler error: broken MIR in AsyncDropGlue(DefId(2:15392 ~ core[50b5]::future::async_drop::async_drop_in_place::{closure#0}), Coroutine(DefId(2:15392 ~ core[50b5]::future::async_drop::async_drop_in_place::{closure#0}), [std::result::Result<(), std::string::String>, (), std::future::ResumeTy, (), (), CoroutineWitness(DefId(2:15392 ~ core[50b5]::future::async_drop::async_drop_in_place::{closure#0}), [std::result::Result<(), std::string::String>]), (*mut std::result::Result<(), std::string::String>,)])) (after pass AbortUnwindingCalls) at bb1[3]:
                                local _22 still has storage when returning from function
  --> /home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/async_drop.rs:46:70
   |
46 |   pub async unsafe fn async_drop_in_place<T: ?Sized>(_to_drop: *mut T) {
   |  ______________________________________________________________________^
...  |
49 | | }
   | |_^
   |
note: delayed at compiler/rustc_mir_transform/src/lint.rs:115:34
         0: <rustc_errors::DiagCtxtInner>::emit_diagnostic
         1: <rustc_errors::DiagCtxtHandle>::emit_diagnostic
         2: <rustc_span::ErrorGuaranteed as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
         3: <rustc_errors::DiagCtxtHandle>::span_delayed_bug::<rustc_span::span_encoding::Span, alloc::string::String>
         4: <rustc_mir_transform::lint::Lint>::fail::<alloc::string::String>
         5: <rustc_mir_transform::lint::Lint as rustc_middle::mir::visit::Visitor>::visit_terminator
         6: rustc_mir_transform::lint::lint_body
         7: rustc_mir_transform::pass_manager::run_passes_inner
         8: <rustc_mir_transform::coroutine::StateTransform as rustc_mir_transform::pass_manager::MirPass>::run_pass
         9: rustc_mir_transform::pass_manager::run_passes_inner
        10: rustc_mir_transform::shim::make_shim
        11: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::mir_shims::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
        12: <rustc_query_impl::query_impl::mir_shims::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_middle::ty::instance::InstanceKind)>>::call_once
        13: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::instance::InstanceKind, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        14: rustc_query_impl::query_impl::mir_shims::get_query_non_incr::__rust_end_short_backtrace
        15: <rustc_middle::ty::context::TyCtxt>::coroutine_layout
        16: rustc_ty_utils::layout::layout_of_uncached
        17: rustc_ty_utils::layout::layout_of
        18: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        19: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        20: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        21: rustc_ty_utils::layout::layout_of_uncached
        22: rustc_ty_utils::layout::layout_of
        23: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        24: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        25: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        26: rustc_ty_utils::layout::layout_of_uncached
        27: rustc_ty_utils::layout::layout_of
        28: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        29: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        30: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        31: rustc_ty_utils::layout::layout_of
        32: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        33: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        34: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        35: <rustc_middle::ty::layout::LayoutCx as rustc_middle::ty::layout::LayoutOf>::spanned_layout_of
        36: <core::iter::adapters::GenericShunt<core::iter::adapters::by_ref_sized::ByRefSized<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}>>, core::result::Result<core::convert::Infallible, &rustc_middle::ty::layout::LayoutError>> as core::iter::traits::iterator::Iterator>::next
        37: core::iter::adapters::try_process::<core::iter::adapters::by_ref_sized::ByRefSized<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}>>, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>, core::result::Result<core::convert::Infallible, &rustc_middle::ty::layout::LayoutError>, <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}> as core::iter::traits::iterator::Iterator>::try_collect<rustc_index::vec::IndexVec<rustc_middle::mir::query::CoroutineSavedLocal, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>>>::{closure#0}, rustc_index::vec::IndexVec<rustc_middle::mir::query::CoroutineSavedLocal, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>>>
        38: rustc_ty_utils::layout::layout_of_uncached
        39: rustc_ty_utils::layout::layout_of
        40: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        41: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        42: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        43: rustc_ty_utils::layout::layout_of_uncached
        44: rustc_ty_utils::layout::layout_of
        45: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        46: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        47: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        48: rustc_ty_utils::layout::layout_of_uncached
        49: rustc_ty_utils::layout::layout_of
        50: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        51: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        52: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        53: <rustc_middle::ty::layout::LayoutCx as rustc_middle::ty::layout::LayoutOf>::spanned_layout_of
        54: <core::iter::adapters::GenericShunt<core::iter::adapters::by_ref_sized::ByRefSized<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}>>, core::result::Result<core::convert::Infallible, &rustc_middle::ty::layout::LayoutError>> as core::iter::traits::iterator::Iterator>::next
        55: core::iter::adapters::try_process::<core::iter::adapters::by_ref_sized::ByRefSized<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}>>, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>, core::result::Result<core::convert::Infallible, &rustc_middle::ty::layout::LayoutError>, <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}> as core::iter::traits::iterator::Iterator>::try_collect<rustc_index::vec::IndexVec<rustc_middle::mir::query::CoroutineSavedLocal, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>>>::{closure#0}, rustc_index::vec::IndexVec<rustc_middle::mir::query::CoroutineSavedLocal, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>>>
        56: rustc_ty_utils::layout::layout_of_uncached
        57: rustc_ty_utils::layout::layout_of
        58: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        59: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        60: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        61: rustc_ty_utils::layout::layout_of_uncached
        62: rustc_ty_utils::layout::layout_of
        63: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        64: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        65: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        66: rustc_ty_utils::layout::layout_of_uncached
        67: rustc_ty_utils::layout::layout_of
        68: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        69: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        70: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        71: <rustc_middle::ty::layout::LayoutCx as rustc_middle::ty::layout::LayoutOf>::spanned_layout_of
        72: <core::iter::adapters::GenericShunt<core::iter::adapters::by_ref_sized::ByRefSized<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}>>, core::result::Result<core::convert::Infallible, &rustc_middle::ty::layout::LayoutError>> as core::iter::traits::iterator::Iterator>::next
        73: core::iter::adapters::try_process::<core::iter::adapters::by_ref_sized::ByRefSized<core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}>>, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>, core::result::Result<core::convert::Infallible, &rustc_middle::ty::layout::LayoutError>, <core::iter::adapters::map::Map<core::slice::iter::Iter<rustc_middle::mir::query::CoroutineSavedTy>, rustc_ty_utils::layout::layout_of_uncached::{closure#12}> as core::iter::traits::iterator::Iterator>::try_collect<rustc_index::vec::IndexVec<rustc_middle::mir::query::CoroutineSavedLocal, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>>>::{closure#0}, rustc_index::vec::IndexVec<rustc_middle::mir::query::CoroutineSavedLocal, rustc_abi::layout::ty::TyAndLayout<rustc_middle::ty::Ty>>>
        74: rustc_ty_utils::layout::layout_of_uncached
        75: rustc_ty_utils::layout::layout_of
        76: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::layout_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 16]>>
        77: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_middle::ty::PseudoCanonicalInput<rustc_middle::ty::Ty>, rustc_middle::query::erase::Erased<[u8; 16]>>, false, true, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        78: rustc_query_impl::query_impl::layout_of::get_query_non_incr::__rust_end_short_backtrace
        79: <rustc_mir_transform::known_panics_lint::KnownPanicsLint as rustc_mir_transform::pass_manager::MirLint>::run_lint
        80: rustc_mir_transform::run_analysis_to_runtime_passes
        81: rustc_mir_transform::mir_drops_elaborated_and_const_checked
        82: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
        83: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_data_structures::vec_cache::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        84: rustc_query_impl::query_impl::mir_drops_elaborated_and_const_checked::get_query_non_incr::__rust_end_short_backtrace
        85: rustc_interface::passes::run_required_analyses
        86: rustc_interface::passes::analysis
        87: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 0]>>
        88: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
        89: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
        90: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
        91: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
        92: std::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
        93: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
        94: std::sys::pal::unix::thread::Thread::new::thread_start
        95: <unknown>
        96: <unknown>
  --> /home/matthias/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/async_drop.rs:46:70
   |
46 |   pub async unsafe fn async_drop_in_place<T: ?Sized>(_to_drop: *mut T) {
   |  ______________________________________________________________________^
...  |
49 | | }
   | |_^

..
..
..

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    C-bugCategory: This is a bug.F-async_drop`#![feature(async_drop)]`I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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