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Attempt to continue a labeled loop from within async block panics compiler #73704

Closed
nicolaiunrein opened this issue Jun 24, 2020 · 1 comment
Closed

Attempt to continue a labeled loop from within async block panics compiler #73704

nicolaiunrein opened this issue Jun 24, 2020 · 1 comment
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.

Comments

@nicolaiunrein
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Description

I found the following compiler bug when attempting to continue a tagged loop from within an async block. In Coc I get a warning instead of an error for this. And when I try to compile the compiler panics. I tried on nightly as well and it seems to give the same error. If I change the continue to a break I get error `break` to unknown label as expected.

Code

    pub async fn run(&self) {
        'outer: loop {
            match TcpStream::connect(self.addr).await {
                Ok(mut stream) => {
                    trace!("Connected");
                    let (mut reader, mut writer) = self.get_framed(&mut stream);

                    let recv_loop = async move {
                        while let Some(item) = reader.next().await {
                            match item {
                                Ok(inner) => self.broadcast_msg(inner).await,
                                Err(err) => self.broadcast_decode_error(err).await,
                            }
                        }
                    };

                    let send_loop = async move {
                        let outbound_stream = self.outbound_ch.subscribe().await;
                        pin_mut!(outbound_stream);

                        while let Some(cmd) = outbound_stream.next().await {
                            match cmd {
                                Command::Msg(mut cmd) => {
                                    if let Err(err) = writer.send(cmd.cmd).await {
                                        if let Some(notify) = cmd.notify.take() {
                                            if let Ok(notify) = Arc::try_unwrap(notify) {
                                                let _ =
                                                    notify.send(Err(SendError::CodecError(err)));
                                            }
                                        }
                                    } else {
                                        if let Some(notify) = cmd.notify.take() {
                                            if let Ok(notify) = Arc::try_unwrap(notify) {
                                                let _ = notify.send(Ok(()));
                                            }
                                        }
                                    }
                                }

                                Command::Reconnect => {
                                    continue 'outer;
                                    // ^ ------------------------- This leads to the below bug...
                                }
                            }
                        }
                    };

                    let ping_loop = async move {
                        if let Some(ref token) = self.ping_token {
                            loop {
                                if let Err(_) = self
                                    .do_send_with_ack(token.clone(), self.ping_timeout, |_| true)
                                    .await
                                {
                                    self.broadcast_ping_timeout().await;
                                    return;
                                }
                                tokio::time::delay_for(self.ping_interval).await;
                            }
                        } else {
                            futures::future::pending().await
                        }
                    };

                    pin_mut!(recv_loop);
                    pin_mut!(send_loop);
                    pin_mut!(ping_loop);

                    self.broadcast_connect().await;

                    let io_loop = futures::future::select(recv_loop, send_loop);
                    pin_mut!(io_loop);

                    futures::future::select(io_loop, ping_loop).await;
                }

                Err(error) => {
                    self.broadcast_connect_error(error).await;
                    tokio::time::delay_for(self.retry_delay).await;
                    continue;
                }
            }

            self.broadcast_disconnect().await;
            tokio::time::delay_for(self.reconnect_delay).await;
        }
    }

Meta

rustc --version --verbose:

rustc 1.44.1 (c7087fe00 2020-06-17)
binary: rustc
commit-hash: c7087fe00d2ba919df1d813c040a5d47e43b0fe7
commit-date: 2020-06-17
host: x86_64-unknown-linux-gnu
release: 1.44.1
LLVM version: 9.0

rustup run nightly rustc --version --verbose

rustc 1.46.0-nightly (a8cf39911 2020-06-21)
binary: rustc
commit-hash: a8cf3991177f30694200002cd9479ffbbe6d9a1a
commit-date: 2020-06-21
host: x86_64-unknown-linux-gnu
release: 1.46.0-nightly
LLVM version: 10.0

Error output

error: internal compiler error: src/librustc_mir_build/build/scope.rs:313: no enclosing breakable scope found
   --> src/managed_connection/mod.rs:129:37
    |
129 | ...                   continue 'outer;
    |                       ^^^^^^^^^^^^^^^

thread 'rustc' panicked at 'Box<Any>', /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7/src/libstd/macros.rs:13:23
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.44.1 (c7087fe00 2020-06-17) running on x86_64-unknown-linux-gnu

note: compiler flags: -C debuginfo=2 -C incremental --crate-type lib

note: some of the compiler flags provided by cargo are hidden

error: aborting due to previous error

error: could not compile `rust-utils`.
Backtrace 

    Checking rust-utils v0.1.0 (/home/nicolai/Repos/Rust/rust-utils)
    Checking rust-utils v0.1.0 (/home/nicolai/Repos/Rust/rust-utils)
error: internal compiler error: src/librustc_mir_build/build/scope.rs:313: no enclosing breakable scope found
   --> src/managed_connection/mod.rs:129:37
    |
129 | ...                   continue 'outer;
    |                       ^^^^^^^^^^^^^^^

error: internal compiler error: src/librustc_mir_build/build/scope.rs:313: no enclosing breakable scope found
   --> src/managed_connection/mod.rs:129:37
    |
129 | ...                   continue 'outer;
    |                       ^^^^^^^^^^^^^^^

thread 'rustc' panicked at 'Box<Any>', /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7/src/libstd/macros.rs:13:23
stack backtrace:thread 'rustc' panicked at 'Box<Any>', /rustc/c7087fe00d2ba919df1d813c040a5d47e43b0fe7/src/libstd/macros.rs:13:23
stack backtrace:

   0: backtrace::backtrace::libunwind::trace
   0: backtrace::backtrace::libunwind::trace
             at /cargo/registry/src/git.luolix.top-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
   1: backtrace::backtrace::trace_unsynchronized
             at /cargo/registry/src/git.luolix.top-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print_fmt
             at src/libstd/sys_common/backtrace.rs:78
             at /cargo/registry/src/git.luolix.top-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
   1: backtrace::backtrace::trace_unsynchronized
             at /cargo/registry/src/git.luolix.top-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print_fmt
             at src/libstd/sys_common/backtrace.rs:78
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
             at src/libstd/sys_common/backtrace.rs:59
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
             at src/libstd/sys_common/backtrace.rs:59
   4: core::fmt::write
             at src/libcore/fmt/mod.rs:1069
   4: core::fmt::write
             at src/libcore/fmt/mod.rs:1069
   5: std::io::Write::write_fmt
             at src/libstd/io/mod.rs:1504
   5: std::io::Write::write_fmt
             at src/libstd/io/mod.rs:1504
   6: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:62   6: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:62
   7: std::sys_common::backtrace::print

   7: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:49
             at src/libstd/sys_common/backtrace.rs:49
   8: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:198
   8: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:198
   9: std::panicking::default_hook
             at src/libstd/panicking.rs:218   9: std::panicking::default_hook
             at src/libstd/panicking.rs:218

  10: rustc_driver::report_ice
  10: rustc_driver::report_ice
  11: <alloc::boxed::Box<F> as core::ops::function::Fn<A>>::call
  11: <alloc::boxed::Box<F> as core::ops::function::Fn<A>>::call
             at /home/nicolai/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/liballoc/boxed.rs:1022             at /home/nicolai/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/liballoc/boxed.rs:1022

  12: proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter::{{closure}}::{{closure}}
  12: proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter::{{closure}}::{{closure}}
             at /home/nicolai/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libproc_macro/bridge/client.rs:305
             at /home/nicolai/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libproc_macro/bridge/client.rs:305
  13: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:515
  13: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:515
  14: std::panicking::begin_panic
  15: rustc_errors::HandlerInner::span_bug  14: std::panicking::begin_panic
  15: rustc_errors::HandlerInner::span_bug

  16: rustc_errors::Handler::span_bug
  16: rustc_errors::Handler::span_bug
  17: rustc_middle::util::bug::opt_span_bug_fmt::{{closure}}
  17: rustc_middle::util::bug::opt_span_bug_fmt::{{closure}}
  18: rustc_middle::ty::context::tls::with_opt::{{closure}}
  19: rustc_middle::ty::context::tls::with_opt  18: rustc_middle::ty::context::tls::with_opt::{{closure}}
  19: rustc_middle::ty::context::tls::with_opt

  20: rustc_middle::util::bug::opt_span_bug_fmt
  20: rustc_middle::util::bug::opt_span_bug_fmt
  21: rustc_middle::util::bug::span_bug_fmt
  22: rustc_mir_build::build::scope::Scopes::find_breakable_scope::{{closure}}::{{closure}}
  21: rustc_middle::util::bug::span_bug_fmt
  22: rustc_mir_build::build::scope::Scopes::find_breakable_scope::{{closure}}::{{closure}}
  23: rustc_mir_build::build::scope::Scopes::find_breakable_scope
  23: rustc_mir_build::build::scope::Scopes::find_breakable_scope
  24: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::break_scope
  25: rustc_mir_build::build::expr::stmt::<impl rustc_mir_build::build::Builder>::stmt_expr
  24: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::break_scope
  25: rustc_mir_build::build::expr::stmt::<impl rustc_mir_build::build::Builder>::stmt_expr
  26: rustc_mir_build::build::expr::stmt::<impl rustc_mir_build::build::Builder>::stmt_expr
  26: rustc_mir_build::build::expr::stmt::<impl rustc_mir_build::build::Builder>::stmt_expr
  27: rustc_mir_build::build::block::<impl rustc_mir_build::build::Builder>::ast_block_stmts
  27: rustc_mir_build::build::block::<impl rustc_mir_build::build::Builder>::ast_block_stmts
  28: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  28: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  29: rustc_mir_build::build::expr::as_temp::<impl rustc_mir_build::build::Builder>::expr_as_temp
  29: rustc_mir_build::build::expr::as_temp::<impl rustc_mir_build::build::Builder>::expr_as_temp
  30: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  30: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  31: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  31: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  32: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  32: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  33: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
  33: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
  34: <core::iter::adapters::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
  34: <core::iter::adapters::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
  35: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  35: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  36: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  36: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  37: rustc_mir_build::build::block::<impl rustc_mir_build::build::Builder>::ast_block_stmts
  37: rustc_mir_build::build::block::<impl rustc_mir_build::build::Builder>::ast_block_stmts
  38: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  38: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  39: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  39: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  40: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  40: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  41: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
  41: rustc_mir_build::build::scope::<impl rustc_mir_build::build::Builder>::in_scope
  42: <core::iter::adapters::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
  42: <core::iter::adapters::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
  43: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  43: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  44: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  44: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  45: rustc_mir_build::build::block::<impl rustc_mir_build::build::Builder>::ast_block_stmts
  45: rustc_mir_build::build::block::<impl rustc_mir_build::build::Builder>::ast_block_stmts
  46: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  46: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  47: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  47: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  48: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  48: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  49: rustc_mir_build::build::block::<impl rustc_mir_build::build::Builder>::ast_block_stmts
  49: rustc_mir_build::build::block::<impl rustc_mir_build::build::Builder>::ast_block_stmts
  50: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  50: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  51: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  51: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  52: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  52: rustc_mir_build::build::expr::into::<impl rustc_mir_build::build::Builder>::into_expr
  53: rustc_mir_build::build::construct_fn
  53: rustc_mir_build::build::construct_fn
  54: rustc_infer::infer::InferCtxtBuilder::enter
  54: rustc_infer::infer::InferCtxtBuilder::enter
  55: rustc_mir_build::build::mir_built
  55: rustc_mir_build::build::mir_built
  56: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_built>::compute
  56: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_built>::compute
  57: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  57: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  58: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  58: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  59: rustc_query_system::query::plumbing::get_query
  59: rustc_query_system::query::plumbing::get_query
  60: rustc_mir::transform::check_unsafety::unsafety_check_result
  60: rustc_mir::transform::check_unsafety::unsafety_check_result
  61: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::unsafety_check_result>::compute
  61: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::unsafety_check_result>::compute
  62: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  62: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  63: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  63: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  64: rustc_query_system::query::plumbing::get_query
  64: rustc_query_system::query::plumbing::get_query
  65: <rustc_mir::transform::check_unsafety::UnsafetyChecker as rustc_middle::mir::visit::Visitor>::visit_rvalue
  65: <rustc_mir::transform::check_unsafety::UnsafetyChecker as rustc_middle::mir::visit::Visitor>::visit_rvalue
  66: <rustc_mir::transform::check_unsafety::UnsafetyChecker as rustc_middle::mir::visit::Visitor>::visit_statement
  66: <rustc_mir::transform::check_unsafety::UnsafetyChecker as rustc_middle::mir::visit::Visitor>::visit_statement
  67: rustc_mir::transform::check_unsafety::unsafety_check_result
  67: rustc_mir::transform::check_unsafety::unsafety_check_result
  68: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::unsafety_check_result>::compute
  68: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::unsafety_check_result>::compute
  69: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  69: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  70: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  70: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  71: rustc_query_system::query::plumbing::get_query
  71: rustc_query_system::query::plumbing::get_query
  72: <rustc_mir::transform::check_unsafety::UnsafetyChecker as rustc_middle::mir::visit::Visitor>::visit_rvalue
  72: <rustc_mir::transform::check_unsafety::UnsafetyChecker as rustc_middle::mir::visit::Visitor>::visit_rvalue
  73: <rustc_mir::transform::check_unsafety::UnsafetyChecker as rustc_middle::mir::visit::Visitor>::visit_statement
  73: <rustc_mir::transform::check_unsafety::UnsafetyChecker as rustc_middle::mir::visit::Visitor>::visit_statement
  74: rustc_mir::transform::check_unsafety::unsafety_check_result
  74: rustc_mir::transform::check_unsafety::unsafety_check_result
  75: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::unsafety_check_result>::compute
  75: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::unsafety_check_result>::compute
  76: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  76: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  77: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  77: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  78: rustc_query_system::query::plumbing::get_query
  78: rustc_query_system::query::plumbing::get_query
  79: rustc_mir::transform::mir_const
  79: rustc_mir::transform::mir_const
  80: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_const>::compute
  80: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_const>::compute
  81: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  81: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  82: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  82: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  83: rustc_query_system::query::plumbing::get_query
  83: rustc_query_system::query::plumbing::get_query
  84: rustc_mir::transform::mir_validated
  84: rustc_mir::transform::mir_validated
  85: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_validated>::compute
  85: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_validated>::compute
  86: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  86: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  87: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  87: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  88: rustc_query_system::query::plumbing::get_query
  88: rustc_query_system::query::plumbing::get_query
  89: rustc_mir::borrow_check::mir_borrowck
  89: rustc_mir::borrow_check::mir_borrowck
  90: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_borrowck>::compute
  90: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::mir_borrowck>::compute
  91: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  91: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  92: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  92: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  93: rustc_query_system::query::plumbing::get_query
  93: rustc_query_system::query::plumbing::get_query
  94: rustc_typeck::collect::type_of::type_of
  94: rustc_typeck::collect::type_of::type_of
  95: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  95: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
  96: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  96: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  97: rustc_query_system::query::plumbing::get_query
  97: rustc_query_system::query::plumbing::get_query
  98: rustc_middle::ty::util::<impl rustc_middle::ty::context::TyCtxt>::try_expand_impl_trait_type::OpaqueTypeExpander::expand_opaque_ty
  98: rustc_middle::ty::util::<impl rustc_middle::ty::context::TyCtxt>::try_expand_impl_trait_type::OpaqueTypeExpander::expand_opaque_ty
  99: rustc_middle::ty::util::<impl rustc_middle::ty::context::TyCtxt>::try_expand_impl_trait_type
  99: rustc_middle::ty::util::<impl rustc_middle::ty::context::TyCtxt>::try_expand_impl_trait_type
 100: rustc_typeck::check::check_item_type
 100: rustc_typeck::check::check_item_type
 101: rustc_middle::hir::map::Map::visit_item_likes_in_module
 101: rustc_middle::hir::map::Map::visit_item_likes_in_module
 102: rustc_typeck::check::check_mod_item_types
 102: rustc_typeck::check::check_mod_item_types
 103: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::check_mod_item_types>::compute
 103: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::check_mod_item_types>::compute
 104: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
 104: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
 105: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
 105: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.


note: the compiler unexpectedly panicked. this is a bug.

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reportsnote: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports



note: rustc 1.44.1 (c7087fe00 2020-06-17) running on x86_64-unknown-linux-gnu

note: rustc 1.44.1 (c7087fe00 2020-06-17) running on x86_64-unknown-linux-gnu

note: compiler flags: -C debuginfo=2 -C incremental --crate-type lib
note: compiler flags: -C debuginfo=2 -C incremental --crate-type lib


note: some of the compiler flags provided by cargo are hidden

query stack during panic:note: some of the compiler flags provided by cargo are hidden

query stack during panic:

#0 [mir_built] building MIR for
#0 [mir_built] building MIR for
#1 [unsafety_check_result] unsafety-checking `managed_connection::ManagedConnection::<Output, Input, Encoder, Decoder, Error>::run::{{closure}}#0::{{closure}}#1`
#1 [unsafety_check_result] unsafety-checking `managed_connection::ManagedConnection::<Output, Input, Encoder, Decoder, Error>::run::{{closure}}#0::{{closure}}#1`
#2 [unsafety_check_result] unsafety-checking `managed_connection::ManagedConnection::<Output, Input, Encoder, Decoder, Error>::run::{{closure}}#0`
#3 [unsafety_check_result] unsafety-checking `managed_connection::ManagedConnection::<Output, Input, Encoder, Decoder, Error>::run`
#4 [mir_const] processing `managed_connection::ManagedConnection::<Output, Input, Encoder, Decoder, Error>::run`
#2 [unsafety_check_result] unsafety-checking `managed_connection::ManagedConnection::<Output, Input, Encoder, Decoder, Error>::run::{{closure}}#0`
#3 [unsafety_check_result] unsafety-checking `managed_connection::ManagedConnection::<Output, Input, Encoder, Decoder, Error>::run`
#4 [mir_const] processing `managed_connection::ManagedConnection::<Output, Input, Encoder, Decoder, Error>::run`
#5 [mir_validated] processing `managed_connection::ManagedConnection::<Output, Input, Encoder, Decoder, Error>::run`
#6 [mir_borrowck] borrow-checking `managed_connection::ManagedConnection::<Output, Input, Encoder, Decoder, Error>::run`
#7 [type_of] processing `managed_connection::ManagedConnection<Output, Input, Encoder, Decoder, Error>::run::{{opaque}}#0`
#5 [mir_validated] processing `managed_connection::ManagedConnection::<Output, Input, Encoder, Decoder, Error>::run`
#6 [mir_borrowck] borrow-checking `managed_connection::ManagedConnection::<Output, Input, Encoder, Decoder, Error>::run`
#7 [type_of] processing `managed_connection::ManagedConnection<Output, Input, Encoder, Decoder, Error>::run::{{opaque}}#0`
#8 [check_mod_item_types] checking item types in module `managed_connection`
#9 [analysis] running analysis passes on this crate#8 [check_mod_item_types] checking item types in module `managed_connection`
#9 [analysis] running analysis passes on this crate
end of query stack

end of query stack
error: aborting due to previous error

error: aborting due to previous error

error: could not compile `rust-utils`.

To learn more, run the command again with --verbose.
error: could not compile `rust-utils`.

To learn more, run the command again with --verbose.

@nicolaiunrein nicolaiunrein 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 Jun 24, 2020
@jonas-schievink
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duplicate of #73541

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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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