matthiaskrgr
commented
10 months ago bit smaller:
pub trait BorrowComposite {
type Ref<'a>: 'a;
}
impl BorrowComposite for () {
type Ref<'a> = ();
}
pub trait Component<Args> {
type Output;
}
impl<Args> Component<Args> for () {
type Output = ();
}
pub fn delay<Args: BorrowComposite, Make: for<'a> FnMut(Args::Ref<'a>) -> C, C: Component<Args>>(
make: Make,
) -> impl Component<Args> {
}
pub fn crash() -> impl Component<()> {
delay(|()| delay(|()| ()))
}
pub fn main() {}
Jules-Bertholet
compiler-errors
Code
Meta
rustc --version --verbose:The same issue occurs with the latest nightly too.
Error output
Backtrace
It doesn't look like I get any more info with `RUST_BACKTRACE=1`. ``` error: internal compiler error: no errors encountered even though `delay_span_bug` issued error: internal compiler error: failure to relate an opaque to itself should result in an error later on --> crash/src/lib.rs:43:16 | 43 | delay(|()| delay(|()| ())) | ^ | note: delayed at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/compiler/rustc_infer/src/infer/nll_relate/mod.rs:500:37 0:::emit_diagnostic
1: ::delay_span_bug::
2: rustc_borrowck::type_check::type_check
3: rustc_borrowck::nll::compute_regions
4: rustc_borrowck::do_mir_borrowck
5: rustc_borrowck::mir_borrowck
6: rustc_query_impl::plumbing::__rust_begin_short_backtrace::>
7: >::call_once
8: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, true>
9: rustc_query_impl::query_impl::mir_borrowck::get_query_incr::__rust_end_short_backtrace
10: ::prove_closure_bounds
11: ::typeck_mir
12: rustc_borrowck::type_check::type_check
13: rustc_borrowck::nll::compute_regions
14: rustc_borrowck::do_mir_borrowck
15: rustc_borrowck::mir_borrowck
16: rustc_query_impl::plumbing::__rust_begin_short_backtrace::>
17: >::call_once
18: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, true>
19: rustc_query_impl::query_impl::mir_borrowck::get_query_incr::__rust_end_short_backtrace
20: rustc_hir_analysis::collect::type_of::opaque::find_opaque_ty_constraints_for_rpit
21: rustc_hir_analysis::collect::type_of::type_of
22: rustc_query_impl::plumbing::__rust_begin_short_backtrace::>
23: >::call_once
24: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, true>
25: rustc_query_impl::query_impl::type_of::get_query_incr::__rust_end_short_backtrace
26: rustc_middle::query::plumbing::query_get_at::>>
27: rustc_hir_analysis::check::check::check_mod_item_types
28: rustc_query_impl::plumbing::__rust_begin_short_backtrace::>
29: >::call_once
30: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, true>
31: rustc_query_impl::query_impl::check_mod_item_types::get_query_incr::__rust_end_short_backtrace
32: ::for_each_module::
33: rustc_hir_analysis::check_crate
34: rustc_interface::passes::analysis
35: rustc_query_impl::plumbing::__rust_begin_short_backtrace::>
36: >::call_once
37: rustc_query_system::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, true>
38: rustc_query_impl::query_impl::analysis::get_query_incr::__rust_end_short_backtrace
39: >::enter::, rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#6}>
40: ::enter::, rustc_span::ErrorGuaranteed>>
41: std::sys_common::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
42: <::spawn_unchecked_, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
43: as core::ops::function::FnOnce>::call_once
at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/alloc/src/boxed.rs:2007:9
44: as core::ops::function::FnOnce>::call_once
at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/alloc/src/boxed.rs:2007:9
45: std::sys::unix::thread::Thread::new::thread_start
at /rustc/cc66ad468955717ab92600c770da8c1601a4ff33/library/std/src/sys/unix/thread.rs:108:17
46: start_thread
47: __GI___clone3
--> crash/src/lib.rs:43:16
|
43 | delay(|()| delay(|()| ()))
| ^
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 1.73.0 (cc66ad468 2023-10-03) running on x86_64-unknown-linux-gnu
note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2 -C incremental=[REDACTED]
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
end of query stack
```