Closed as not planned
Description
The compiler asked to submit this bug report.
Code
#[derive(Clone, Debug)]
pub enum Event {
PressKey(i8),
}
struct Processor {
event_handler: Box<dyn Fn(&Event, &dyn ResultPrinter) -> ()>,
}
impl Processor {
fn handle(&self, ev: Event) {
(self.event_handler)(&ev, self);
}
}
trait ResultPrinter {
fn print(&self, s: String);
}
impl ResultPrinter for Processor {
fn print(&self, s: String) {
println!("{}", s);
}
}
pub fn main() {
let func = |ev: &Event, p: & mut dyn ResultPrinter| match ev {
Event::PressKey(num) => p.print(format!("pressed{}", num)),
};
let p = Processor {
event_handler: Box::new(func),
};
p.handle(Event::PressKey(3));
}Meta
rustc --version --verbose:
rustc 1.68.2 (9eb3afe9e 2023-03-27)
binary: rustc
commit-hash: 9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0
commit-date: 2023-03-27
host: x86_64-unknown-linux-gnu
release: 1.68.2
LLVM version: 15.0.6
Error output
error: internal compiler error: compiler/rustc_infer/src/infer/region_constraints/mod.rs:568:17: cannot relate bound region: ReLateBound(DebruijnIndex(0), BoundRegion { var: 1, kind: BrNamed(DefId(0:31 ~ event_handle_compiler_crash[dd0d]::main::'_#1), '_) }) <= ReLateBound(DebruijnIndex(0), BoundRegion { var: 1, kind: BrNamed(DefId(0:26 ~ event_handle_compiler_crash[dd0d]::Processor::'_#1), '_) })
thread 'rustc' panicked at 'Box<dyn Any>', /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/compiler/rustc_errors/src/lib.rs:987:33
stack backtrace:
0: 0x7f0b09c8e59a - std::backtrace_rs::backtrace::libunwind::trace::ha271a8a7e1f3d4ef
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
1: 0x7f0b09c8e59a - std::backtrace_rs::backtrace::trace_unsynchronized::h85739da0352c791a
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7f0b09c8e59a - std::sys_common::backtrace::_print_fmt::hbc6ebcfb2910b329
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/sys_common/backtrace.rs:65:5
3: 0x7f0b09c8e59a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::he1c117e52d53614f
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/sys_common/backtrace.rs:44:22
4: 0x7f0b09cf039e - core::fmt::write::h25eb51b9526b8e0c
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/core/src/fmt/mod.rs:1213:17
5: 0x7f0b09c7ebe5 - std::io::Write::write_fmt::ha9edec5fb1621933
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/io/mod.rs:1682:15
6: 0x7f0b09c8e365 - std::sys_common::backtrace::_print::hf8657cd429fc3452
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/sys_common/backtrace.rs:47:5
7: 0x7f0b09c8e365 - std::sys_common::backtrace::print::h41b9b18ed86f86bd
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/sys_common/backtrace.rs:34:9
8: 0x7f0b09c9112f - std::panicking::default_hook::{{closure}}::h22a91871f4454152
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/panicking.rs:267:22
9: 0x7f0b09c90e6b - std::panicking::default_hook::h21ddc36de0cd4ae7
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/panicking.rs:286:9
10: 0x7f0b0cfe6324 - rustc_driver[70f63b52fde826b7]::DEFAULT_HOOK::{closure#0}::{closure#0}
11: 0x7f0b09c9196a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6f7e3c94ecc52e2f
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/alloc/src/boxed.rs:2002:9
12: 0x7f0b09c9196a - std::panicking::rust_panic_with_hook::h5059419d6d59b3d0
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/panicking.rs:692:13
13: 0x7f0b0d2a1f81 - std[f8b79e573431a86c]::panicking::begin_panic::<rustc_errors[53e74ce803854a4d]::ExplicitBug>::{closure#0}
14: 0x7f0b0d29a8d6 - std[f8b79e573431a86c]::sys_common::backtrace::__rust_end_short_backtrace::<std[f8b79e573431a86c]::panicking::begin_panic<rustc_errors[53e74ce803854a4d]::ExplicitBug>::{closure#0}, !>
15: 0x7f0b0d32ada6 - std[f8b79e573431a86c]::panicking::begin_panic::<rustc_errors[53e74ce803854a4d]::ExplicitBug>
16: 0x7f0b0d32ad96 - std[f8b79e573431a86c]::panic::panic_any::<rustc_errors[53e74ce803854a4d]::ExplicitBug>
17: 0x7f0b0d3296c2 - <rustc_errors[53e74ce803854a4d]::HandlerInner>::span_bug::<rustc_span[7c23fb27ec020b97]::span_encoding::Span, &alloc[b346c7f99e9347e5]::string::String>
18: 0x7f0b0d329567 - <rustc_errors[53e74ce803854a4d]::Handler>::span_bug::<rustc_span[7c23fb27ec020b97]::span_encoding::Span, &alloc[b346c7f99e9347e5]::string::String>
19: 0x7f0b0d2deacb - rustc_middle[6dfce017f6b7786d]::util::bug::opt_span_bug_fmt::<rustc_span[7c23fb27ec020b97]::span_encoding::Span>::{closure#0}
20: 0x7f0b0d2deb1a - rustc_middle[6dfce017f6b7786d]::ty::context::tls::with_opt::<rustc_middle[6dfce017f6b7786d]::util::bug::opt_span_bug_fmt<rustc_span[7c23fb27ec020b97]::span_encoding::Span>::{closure#0}, !>::{closure#0}
21: 0x7f0b0d2ddbda - rustc_middle[6dfce017f6b7786d]::ty::context::tls::with_context_opt::<rustc_middle[6dfce017f6b7786d]::ty::context::tls::with_opt<rustc_middle[6dfce017f6b7786d]::util::bug::opt_span_bug_fmt<rustc_span[7c23fb27ec020b97]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
22: 0x7f0b0d2ddb06 - rustc_middle[6dfce017f6b7786d]::util::bug::opt_span_bug_fmt::<rustc_span[7c23fb27ec020b97]::span_encoding::Span>
23: 0x7f0b0d2ddac4 - rustc_middle[6dfce017f6b7786d]::util::bug::span_bug_fmt::<rustc_span[7c23fb27ec020b97]::span_encoding::Span>
24: 0x7f0b0af71604 - <rustc_middle[6dfce017f6b7786d]::ty::sty::Region as rustc_middle[6dfce017f6b7786d]::ty::relate::Relate>::relate::<rustc_infer[83c7bda8c7ffae41]::infer::equate::Equate>
25: 0x7f0b0af6cf48 - rustc_middle[6dfce017f6b7786d]::ty::relate::super_relate_tys::<rustc_infer[83c7bda8c7ffae41]::infer::equate::Equate>
26: 0x7f0b0af698be - <rustc_infer[83c7bda8c7ffae41]::infer::equate::Equate as rustc_middle[6dfce017f6b7786d]::ty::relate::TypeRelation>::tys
27: 0x7f0b0b7fbdb3 - <rustc_infer[83c7bda8c7ffae41]::infer::InferCtxt>::commit_if_ok::<rustc_infer[83c7bda8c7ffae41]::infer::InferOk<()>, rustc_middle[6dfce017f6b7786d]::ty::error::TypeError, <rustc_infer[83c7bda8c7ffae41]::infer::at::Trace>::eq<rustc_middle[6dfce017f6b7786d]::ty::Ty>::{closure#0}>
28: 0x7f0b0b7fbca6 - <rustc_infer[83c7bda8c7ffae41]::infer::at::At>::eq::<rustc_middle[6dfce017f6b7786d]::ty::Ty>
29: 0x7f0b0dbc439e - <rustc_infer[83c7bda8c7ffae41]::infer::InferCtxt>::can_eq::<rustc_middle[6dfce017f6b7786d]::ty::Ty>
30: 0x7f0b0dba71d2 - rustc_trait_selection[d385e741675330b5]::traits::error_reporting::suggestions::hint_missing_borrow
31: 0x7f0b0dc4a934 - <rustc_infer[83c7bda8c7ffae41]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[d385e741675330b5]::traits::error_reporting::suggestions::TypeErrCtxtExt>::report_closure_arg_mismatch
32: 0x7f0b0dc5a788 - <rustc_infer[83c7bda8c7ffae41]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[d385e741675330b5]::traits::error_reporting::TypeErrCtxtExt>::report_selection_error
33: 0x7f0b0dc64167 - <rustc_infer[83c7bda8c7ffae41]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[d385e741675330b5]::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
34: 0x7f0b0dc577cf - <rustc_infer[83c7bda8c7ffae41]::infer::error_reporting::TypeErrCtxt as rustc_trait_selection[d385e741675330b5]::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
35: 0x7f0b0b1e2b93 - <rustc_hir_typeck[698e9809084ff9ec]::fn_ctxt::FnCtxt>::demand_coerce
36: 0x7f0b0b1ab689 - <rustc_hir_typeck[698e9809084ff9ec]::fn_ctxt::FnCtxt>::check_decl
37: 0x7f0b0b1a8773 - <rustc_hir_typeck[698e9809084ff9ec]::fn_ctxt::FnCtxt>::check_block_with_expected
38: 0x7f0b0b172d3c - <rustc_hir_typeck[698e9809084ff9ec]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
39: 0x7f0b0b10d8d1 - <rustc_hir_typeck[698e9809084ff9ec]::fn_ctxt::FnCtxt>::check_return_expr
40: 0x7f0b0b104802 - rustc_hir_typeck[698e9809084ff9ec]::check::check_fn
41: 0x7f0b0b0ed0be - rustc_hir_typeck[698e9809084ff9ec]::typeck
42: 0x7f0b0b0de797 - <rustc_query_system[59807289ca97d521]::dep_graph::graph::DepGraph<rustc_middle[6dfce017f6b7786d]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[6dfce017f6b7786d]::ty::context::TyCtxt, rustc_span[7c23fb27ec020b97]::def_id::LocalDefId, &rustc_middle[6dfce017f6b7786d]::ty::typeck_results::TypeckResults>
43: 0x7f0b0b0d62eb - rustc_query_system[59807289ca97d521]::query::plumbing::try_execute_query::<rustc_query_impl[81153385010d7886]::queries::typeck, rustc_query_impl[81153385010d7886]::plumbing::QueryCtxt>
44: 0x7f0b0c7f7f6d - rustc_query_system[59807289ca97d521]::query::plumbing::force_query::<rustc_query_impl[81153385010d7886]::queries::typeck, rustc_query_impl[81153385010d7886]::plumbing::QueryCtxt, rustc_middle[6dfce017f6b7786d]::dep_graph::dep_node::DepKind>
45: 0x7f0b0c7f7e70 - rustc_query_impl[81153385010d7886]::plumbing::force_from_dep_node::<rustc_query_impl[81153385010d7886]::queries::typeck>
46: 0x7f0b0b0608b2 - <rustc_query_system[59807289ca97d521]::dep_graph::graph::DepGraph<rustc_middle[6dfce017f6b7786d]::dep_graph::dep_node::DepKind>>::try_mark_previous_green::<rustc_query_impl[81153385010d7886]::plumbing::QueryCtxt>
47: 0x7f0b0b060621 - <rustc_query_system[59807289ca97d521]::dep_graph::graph::DepGraph<rustc_middle[6dfce017f6b7786d]::dep_graph::dep_node::DepKind>>::try_mark_green::<rustc_query_impl[81153385010d7886]::plumbing::QueryCtxt>
48: 0x7f0b0c5679bf - rustc_query_system[59807289ca97d521]::query::plumbing::try_load_from_disk_and_cache_in_memory::<rustc_query_impl[81153385010d7886]::queries::typeck_item_bodies, rustc_query_impl[81153385010d7886]::plumbing::QueryCtxt>
49: 0x7f0b0c566ae7 - rustc_query_system[59807289ca97d521]::query::plumbing::try_execute_query::<rustc_query_impl[81153385010d7886]::queries::typeck_item_bodies, rustc_query_impl[81153385010d7886]::plumbing::QueryCtxt>
50: 0x7f0b0c99ed5b - <rustc_query_impl[81153385010d7886]::Queries as rustc_middle[6dfce017f6b7786d]::ty::query::QueryEngine>::typeck_item_bodies
51: 0x7f0b0b47bee2 - <rustc_session[cd7c78827427c6d6]::session::Session>::time::<(), rustc_hir_analysis[651175ae4d1746c1]::check_crate::{closure#7}>
52: 0x7f0b0b47b352 - rustc_hir_analysis[651175ae4d1746c1]::check_crate
53: 0x7f0b0b47afab - rustc_interface[698bad460dbd68d3]::passes::analysis
54: 0x7f0b0c711f76 - <rustc_query_system[59807289ca97d521]::dep_graph::graph::DepGraph<rustc_middle[6dfce017f6b7786d]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[6dfce017f6b7786d]::ty::context::TyCtxt, (), core[1d432356d8e1e9f1]::result::Result<(), rustc_errors[53e74ce803854a4d]::ErrorGuaranteed>>
55: 0x7f0b0c711131 - rustc_query_system[59807289ca97d521]::query::plumbing::try_execute_query::<rustc_query_impl[81153385010d7886]::queries::analysis, rustc_query_impl[81153385010d7886]::plumbing::QueryCtxt>
56: 0x7f0b0c99b60a - <rustc_query_impl[81153385010d7886]::Queries as rustc_middle[6dfce017f6b7786d]::ty::query::QueryEngine>::analysis
57: 0x7f0b0c1c7010 - <rustc_interface[698bad460dbd68d3]::passes::QueryContext>::enter::<rustc_driver[70f63b52fde826b7]::run_compiler::{closure#1}::{closure#2}::{closure#2}, core[1d432356d8e1e9f1]::result::Result<(), rustc_errors[53e74ce803854a4d]::ErrorGuaranteed>>
58: 0x7f0b0c1c4a84 - rustc_span[7c23fb27ec020b97]::with_source_map::<core[1d432356d8e1e9f1]::result::Result<(), rustc_errors[53e74ce803854a4d]::ErrorGuaranteed>, rustc_interface[698bad460dbd68d3]::interface::run_compiler<core[1d432356d8e1e9f1]::result::Result<(), rustc_errors[53e74ce803854a4d]::ErrorGuaranteed>, rustc_driver[70f63b52fde826b7]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
59: 0x7f0b0c1bd2d4 - <scoped_tls[1044df3f3db9be03]::ScopedKey<rustc_span[7c23fb27ec020b97]::SessionGlobals>>::set::<rustc_interface[698bad460dbd68d3]::interface::run_compiler<core[1d432356d8e1e9f1]::result::Result<(), rustc_errors[53e74ce803854a4d]::ErrorGuaranteed>, rustc_driver[70f63b52fde826b7]::run_compiler::{closure#1}>::{closure#0}, core[1d432356d8e1e9f1]::result::Result<(), rustc_errors[53e74ce803854a4d]::ErrorGuaranteed>>
60: 0x7f0b0c1bc9d2 - std[f8b79e573431a86c]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[698bad460dbd68d3]::util::run_in_thread_pool_with_globals<rustc_interface[698bad460dbd68d3]::interface::run_compiler<core[1d432356d8e1e9f1]::result::Result<(), rustc_errors[53e74ce803854a4d]::ErrorGuaranteed>, rustc_driver[70f63b52fde826b7]::run_compiler::{closure#1}>::{closure#0}, core[1d432356d8e1e9f1]::result::Result<(), rustc_errors[53e74ce803854a4d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[1d432356d8e1e9f1]::result::Result<(), rustc_errors[53e74ce803854a4d]::ErrorGuaranteed>>
61: 0x7f0b0c1bc77a - <<std[f8b79e573431a86c]::thread::Builder>::spawn_unchecked_<rustc_interface[698bad460dbd68d3]::util::run_in_thread_pool_with_globals<rustc_interface[698bad460dbd68d3]::interface::run_compiler<core[1d432356d8e1e9f1]::result::Result<(), rustc_errors[53e74ce803854a4d]::ErrorGuaranteed>, rustc_driver[70f63b52fde826b7]::run_compiler::{closure#1}>::{closure#0}, core[1d432356d8e1e9f1]::result::Result<(), rustc_errors[53e74ce803854a4d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[1d432356d8e1e9f1]::result::Result<(), rustc_errors[53e74ce803854a4d]::ErrorGuaranteed>>::{closure#1} as core[1d432356d8e1e9f1]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
62: 0x7f0b09c9b823 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3205ec2d7fc232c5
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/alloc/src/boxed.rs:1988:9
63: 0x7f0b09c9b823 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3bb5daec8177f56b
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/alloc/src/boxed.rs:1988:9
64: 0x7f0b09c9b823 - std::sys::unix::thread::Thread::new::thread_start::had7b8061e306bb5c
at /rustc/9eb3afe9ebe9c7d2b84b71002d44f4a0edac95e0/library/std/src/sys/unix/thread.rs:108:17
65: 0x7f0b099b9b43 - start_thread
at ./nptl/./nptl/pthread_create.c:442:8
66: 0x7f0b09a4ba00 - clone3
at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
67: 0x0 - <unknown>
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 1.68.2 (9eb3afe9e 2023-03-27) running on x86_64-unknown-linux-gnu
note: compiler flags: --crate-type bin -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:
#0 [typeck] type-checking `main`
#1 [typeck_item_bodies] type-checking all item bodies
#2 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `tricks`
[Finished running. Exit status: 101]
On the playground, the beta version catches this pattern.