Description
openedon Jul 2, 2021
Code
#![feature(min_type_alias_impl_trait)]
use std::future::Future;
struct Connection {
}
trait Transaction {
}
struct TestTransaction<'conn> {
conn: &'conn Connection
}
impl<'conn> Transaction for TestTransaction<'conn> {
}
struct Context {
}
type TransactionResult<O> = Result<O, ()>;
type TransactionFuture<'__, O> = impl '__ + Future<Output = TransactionResult<O>>;
fn execute_transaction_fut<'f, F, O>(f: F) -> impl FnOnce(&mut dyn Transaction) -> TransactionFuture<O>
where
F: FnOnce(&mut dyn Transaction) -> TransactionFuture<O> + 'f
{
f
}
impl Context {
async fn do_transaction<O>(
&self, f: impl FnOnce(&mut dyn Transaction) -> TransactionFuture<O>
) -> TransactionResult<O>
{
let mut conn = Connection {};
let mut transaction = TestTransaction { conn: &mut conn };
f(&mut transaction).await
}
}Meta
rustc --version --verbose:
rustc 1.55.0-nightly (a435b49e8 2021-06-28)
binary: rustc
commit-hash: a435b49e86d16e98dcc6595dd471f95e823f41aa
commit-date: 2021-06-28
host: x86_64-apple-darwin
release: 1.55.0-nightly
LLVM version: 12.0.1
Error output
thread 'rustc' panicked at 'assertion failed: !erased_self_ty.has_escaping_bound_vars()', compiler/rustc_trait_selection/src/opaque_types.rs:1182:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
note: rustc 1.55.0-nightly (a435b49e8 2021-06-28) running on x86_64-apple-darwin
note: compiler flags: -C opt-level=3 -C embed-bitcode=no --crate-type bin
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
#0 [typeck] type-checking `ice1::execute_transaction_fut`
#1 [type_of] computing type of `ice1::TransactionFuture::{opaque#0}`
end of query stack
error: could not compile `rust-playground`
Backtrace
Compiling rust-playground v0.1.0 (/Users/fourbytes/Projects/rust-playground)
thread 'rustc' panicked at 'assertion failed: !erased_self_ty.has_escaping_bound_vars()', compiler/rustc_trait_selection/src/opaque_types.rs:1182:5
stack backtrace:
0: _rust_begin_unwind
1: core::panicking::panic_fmt
2: core::panicking::panic
3: rustc_trait_selection::opaque_types::Instantiator::fold_opaque_ty
4: <rustc_middle::ty::fold::BottomUpFolder<F,G,H> as rustc_middle::ty::fold::TypeFolder>::fold_ty
5: rustc_middle::ty::fold::TypeFoldable::fold_with
6: rustc_trait_selection::opaque_types::Instantiator::fold_opaque_ty
7: <rustc_middle::ty::fold::BottomUpFolder<F,G,H> as rustc_middle::ty::fold::TypeFolder>::fold_ty
8: rustc_typeck::check::fn_ctxt::_impl::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::instantiate_opaque_types_from_value
9: rustc_typeck::check::check::check_fn
10: rustc_infer::infer::InferCtxtBuilder::enter
11: rustc_typeck::check::typeck
12: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
13: rustc_data_structures::stack::ensure_sufficient_stack
14: rustc_query_system::query::plumbing::force_query_with_job
15: rustc_query_system::query::plumbing::get_query_impl
16: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck
17: rustc_typeck::collect::type_of::find_opaque_ty_constraints::ConstraintLocator::check
18: rustc_hir::intravisit::walk_item
19: rustc_typeck::collect::type_of::type_of
20: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
21: rustc_data_structures::stack::ensure_sufficient_stack
22: rustc_query_system::query::plumbing::force_query_with_job
23: rustc_query_system::query::plumbing::get_query_impl
24: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::type_of
25: rustc_typeck::check::check::check_item_type
26: rustc_middle::hir::map::Map::visit_item_likes_in_module
27: rustc_typeck::check::check::check_mod_item_types
28: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
29: rustc_data_structures::stack::ensure_sufficient_stack
30: rustc_query_system::query::plumbing::force_query_with_job
31: rustc_query_system::query::plumbing::get_query_impl
32: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::check_mod_item_types
33: rustc_session::utils::<impl rustc_session::session::Session>::time
34: rustc_typeck::check_crate
35: rustc_interface::passes::analysis
36: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
37: rustc_data_structures::stack::ensure_sufficient_stack
38: rustc_query_system::query::plumbing::force_query_with_job
39: rustc_query_system::query::plumbing::get_query_impl
40: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
41: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
42: rustc_span::with_source_map
43: rustc_interface::interface::create_compiler_and_run
44: scoped_tls::ScopedKey<T>::set
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
error: internal compiler error: unexpected panic
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
note: rustc 1.55.0-nightly (a435b49e8 2021-06-28) running on x86_64-apple-darwin
note: compiler flags: -C embed-bitcode=no -C split-debuginfo=unpacked -C debuginfo=2 -C incremental --crate-type bin
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
#0 [typeck] type-checking `ice1::execute_transaction_fut`
#1 [type_of] computing type of `ice1::TransactionFuture::{opaque#0}`
#2 [check_mod_item_types] checking item types in module `ice1`
#3 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `rust-playground`
To learn more, run the command again with --verbose.
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Category: This is a bug.Call for participation: An issue has been fixed and does not reproduce, but no test has been added.Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Relevant to the compiler team, which will review and decide on the PR/issue.ICE tracked in rust-lang/glacier.