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schleglermarcus opened this issue Apr 4, 2023 · 2 comments
Closed

cannot relate bound region. When using mutable interface on one struct #109920

schleglermarcus opened this issue Apr 4, 2023 · 2 comments
Labels
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.

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@schleglermarcus
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schleglermarcus commented Apr 4, 2023 •
edited
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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));
}

https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=e82cbc051045d7e72c1b65ea352d54e2

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.
@schleglermarcus schleglermarcus 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 4, 2023
@schleglermarcus schleglermarcus changed the title cannot relate bound region. When using multiple interfaces on one struct cannot relate bound region. When using mutable interface on one struct Apr 4, 2023
@lqd
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lqd commented Apr 4, 2023

I believe this has already been fixed on nightly and beta.

@jyn514
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jyn514 commented Apr 4, 2023

Duplicate of #109361

@jyn514 jyn514 marked this as a duplicate of #109361 Apr 4, 2023
@jyn514 jyn514 closed this as not planned Won't fix, can't repro, duplicate, stale Apr 4, 2023
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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.
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@lqd @jyn514 @schleglermarcus