Compiler error

[vkavoun]

Code

#[tokio::main]
async fn main() {
    util::bootstrap();

    let config = config::get_config().await;
    let task_factory = Arc::new(tasks::TaskFactory::new(config).await);
    &task_factory.create_async_jobs().await;
}

pub struct TaskFactory {
    config: Arc<Mutex<Config>>,
    sched: Arc<JobScheduler>,
    job_map: HashMap<JobKey, Uuid>,
}

impl TaskFactory {
    pub async fn new(config: Arc<Mutex<Config>>) -> Self {
        TaskFactory {
            config,
            sched: Arc::new(JobScheduler::new().await.unwrap()),
            job_map: HashMap::new(),
        }
    }

    pub async fn create_async_jobs(&mut self) {
        let fs_job = Job::new("0 15 6,8,10 * Mar,Jun Fri 2017", |_uuid, _lock| {
            let _ = Box::new(async move {
                println!("{:?} Hi I ran", chrono::Utc::now());
            });
        })
        .unwrap();

        let fs_id = self.sched.add(fs_job).await;
        
        self.job_map
            .insert(JobKey::FsWatcher, fs_id.unwrap().to_owned());

        tokio::spawn(self.sched.start());
    }
}

Meta

rustc --version --verbose:

rustc 1.66.0-nightly (1898c34e9 2022-10-26)
binary: rustc
commit-hash: 1898c34e923bad763e723c68dd9f23a09f9eb0fc
commit-date: 2022-10-26
host: x86_64-apple-darwin
release: 1.66.0-nightly
LLVM version: 15.0.2

Error output

thread 'rustc' panicked at 'index out of bounds: the len is 4 but the index is 21', compiler/rustc_middle/src/mir/mod.rs:484:27
stack backtrace:
   0: _rust_begin_unwind
   1: core::panicking::panic_fmt
   2: core::panicking::panic_bounds_check
   3: <rustc_middle::mir::Body>::stmt_at
   4: <rustc_borrowck::MirBorrowckCtxt>::report_region_errors
   5: rustc_borrowck::do_mir_borrowck
   6: rustc_borrowck::mir_borrowck
   7: <rustc_borrowck::provide::{closure#0} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::LocalDefId)>>::call_once
   8: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::def_id::LocalDefId, &rustc_middle::mir::query::BorrowCheckResult>
   9: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalDefId, &rustc_middle::mir::query::BorrowCheckResult>>
  10: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::mir_borrowck, rustc_query_impl::plumbing::QueryCtxt>
  11: rustc_hir_analysis::collect::type_of::find_opaque_ty_constraints_for_rpit
  12: rustc_hir_analysis::collect::type_of::type_of
  13: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId, rustc_middle::ty::Ty>
  14: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::ty::Ty>>
  15: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::type_of, rustc_query_impl::plumbing::QueryCtxt>
  16: rustc_hir_analysis::check::check::check_item_type
  17: rustc_hir_analysis::check::check::check_mod_item_types
  18: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::def_id::LocalDefId, ()>
  19: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalDefId, ()>>
  20: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::check_mod_item_types, rustc_query_impl::plumbing::QueryCtxt>
  21: <rustc_middle::hir::map::Map>::for_each_module::<rustc_hir_analysis::check_crate::{closure#6}::{closure#0}>
  22: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#6}>
  23: rustc_hir_analysis::check_crate
  24: rustc_interface::passes::analysis
  25: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, (), core::result::Result<(), rustc_errors::ErrorGuaranteed>>
  26: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(), core::result::Result<(), rustc_errors::ErrorGuaranteed>>>
  27: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
  28: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#3}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
  29: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#0}::{closure#1}>
  30: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
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 1.66.0-nightly (1898c34e9 2022-10-26) running on x86_64-apple-darwin

note: compiler flags: --crate-type bin -C embed-bitcode=no -C split-debuginfo=unpacked -C debuginfo=2 -C incremental=[REDACTED]

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

query stack during panic:
#0 [mir_borrowck] borrow-checking `tasks::<impl at synch/src/tasks.rs:23:1: 23:17>::create_async_jobs`
#1 [type_of] computing type of `tasks::<impl at synch/src/tasks.rs:23:1: 23:17>::create_async_jobs::{opaque#0}`
#2 [check_mod_item_types] checking item types in module `tasks`
#3 [analysis] running analysis passes on this crate
end of query stack
error: internal compiler error: no errors encountered even though `delay_span_bug` issued

error: internal compiler error: `InferCtxt` incorrectly tainted by errors
  |
  = note: delayed at compiler/rustc_infer/src/infer/mod.rs:1256:27

error: internal compiler error: TyKind::Error constructed but no error reported
  |
  = note: delayed at compiler/rustc_borrowck/src/region_infer/opaque_types.rs:225:29

thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1553:13
stack backtrace:
   0:        0x101ba0872 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h8383c0d931dac499
   1:        0x101bf871a - core::fmt::write::h5c9e1cc689d98f86
   2:        0x101b9283c - std::io::Write::write_fmt::h54b1470a45435db6
   3:        0x101ba063a - std::sys_common::backtrace::print::h680264161637fe54
   4:        0x101ba3a46 - std::panicking::default_hook::{{closure}}::h0483df2036046fcc
   5:        0x101ba3797 - std::panicking::default_hook::hf1f18e1c03ad04ce
   6:        0x10a7f173d - rustc_driver[9bf29971085fb7bf]::DEFAULT_HOOK::{closure#0}::{closure#0}
   7:        0x101ba4241 - std::panicking::rust_panic_with_hook::h4e7d455a2bb5fad8
   8:        0x10f1d7ed7 - std[648fbc9a209824e3]::panicking::begin_panic::<rustc_errors[1873bd03a3adff3d]::ExplicitBug>::{closure#0}
   9:        0x10f1d5f09 - std[648fbc9a209824e3]::sys_common::backtrace::__rust_end_short_backtrace::<std[648fbc9a209824e3]::panicking::begin_panic<rustc_errors[1873bd03a3adff3d]::ExplicitBug>::{closure#0}, !>
  10:        0x10f59c939 - std[648fbc9a209824e3]::panicking::begin_panic::<rustc_errors[1873bd03a3adff3d]::ExplicitBug>
  11:        0x10f1c6ec9 - std[648fbc9a209824e3]::panic::panic_any::<rustc_errors[1873bd03a3adff3d]::ExplicitBug>
  12:        0x10f1cf18e - <rustc_errors[1873bd03a3adff3d]::HandlerInner>::flush_delayed::<alloc[ab4f8790a070fa97]::vec::Vec<rustc_errors[1873bd03a3adff3d]::diagnostic::Diagnostic>, &str>
  13:        0x10f1caff9 - <rustc_errors[1873bd03a3adff3d]::HandlerInner as core[88283cb3fe7bc080]::ops::drop::Drop>::drop
  14:        0x10a77648a - core[88283cb3fe7bc080]::ptr::drop_in_place::<rustc_session[e6307d959f83850c]::parse::ParseSess>
  15:        0x10a777c0b - core[88283cb3fe7bc080]::ptr::drop_in_place::<rustc_session[e6307d959f83850c]::session::Session>
  16:        0x10a7da31e - core[88283cb3fe7bc080]::ptr::drop_in_place::<rustc_interface[12398f78c94f0bee]::interface::Compiler>
  17:        0x10a7c4dcf - rustc_span[37bf332db493ba96]::with_source_map::<core[88283cb3fe7bc080]::result::Result<(), rustc_errors[1873bd03a3adff3d]::ErrorGuaranteed>, rustc_interface[12398f78c94f0bee]::interface::run_compiler<core[88283cb3fe7bc080]::result::Result<(), rustc_errors[1873bd03a3adff3d]::ErrorGuaranteed>, rustc_driver[9bf29971085fb7bf]::run_compiler::{closure#1}>::{closure#0}::{closure#1}>
  18:        0x10a7b42cc - <scoped_tls[c56e5754288267f2]::ScopedKey<rustc_span[37bf332db493ba96]::SessionGlobals>>::set::<rustc_interface[12398f78c94f0bee]::interface::run_compiler<core[88283cb3fe7bc080]::result::Result<(), rustc_errors[1873bd03a3adff3d]::ErrorGuaranteed>, rustc_driver[9bf29971085fb7bf]::run_compiler::{closure#1}>::{closure#0}, core[88283cb3fe7bc080]::result::Result<(), rustc_errors[1873bd03a3adff3d]::ErrorGuaranteed>>
  19:        0x10a78400a - std[648fbc9a209824e3]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[12398f78c94f0bee]::util::run_in_thread_pool_with_globals<rustc_interface[12398f78c94f0bee]::interface::run_compiler<core[88283cb3fe7bc080]::result::Result<(), rustc_errors[1873bd03a3adff3d]::ErrorGuaranteed>, rustc_driver[9bf29971085fb7bf]::run_compiler::{closure#1}>::{closure#0}, core[88283cb3fe7bc080]::result::Result<(), rustc_errors[1873bd03a3adff3d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[88283cb3fe7bc080]::result::Result<(), rustc_errors[1873bd03a3adff3d]::ErrorGuaranteed>>
  20:        0x10a76a02b - <<std[648fbc9a209824e3]::thread::Builder>::spawn_unchecked_<rustc_interface[12398f78c94f0bee]::util::run_in_thread_pool_with_globals<rustc_interface[12398f78c94f0bee]::interface::run_compiler<core[88283cb3fe7bc080]::result::Result<(), rustc_errors[1873bd03a3adff3d]::ErrorGuaranteed>, rustc_driver[9bf29971085fb7bf]::run_compiler::{closure#1}>::{closure#0}, core[88283cb3fe7bc080]::result::Result<(), rustc_errors[1873bd03a3adff3d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[88283cb3fe7bc080]::result::Result<(), rustc_errors[1873bd03a3adff3d]::ErrorGuaranteed>>::{closure#1} as core[88283cb3fe7bc080]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  21:        0x101bad357 - std::sys::unix::thread::Thread::new::thread_start::hf9f65e800e7fef93
  22:     0x7ff818206259 - __pthread_start

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 1.66.0-nightly (1898c34e9 2022-10-26) running on x86_64-apple-darwin

note: compiler flags: --crate-type bin -C embed-bitcode=no -C split-debuginfo=unpacked -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
thread panicked while panicking. aborting.
warning: `synch` (bin "synch") generated 1 warning
error: could not compile `synch`; 1 warning emitted

Caused by:
  process didn't exit successfully: `rustc --crate-name synch --edition=2021 synch/src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C split-debuginfo=unpacked -C debuginfo=2 -C metadata=e8248b5923a5d720 -C extra-filename=-e8248b5923a5d720 --out-dir /Users/dframe/workspace/rust/wasynch/target/debug/deps -C incremental=/Users/dframe/workspace/rust/wasynch/target/debug/incremental -L dependency=/Users/dframe/workspace/rust/wasynch/target/debug/deps --extern axum=/Users/dframe/workspace/rust/wasynch/target/debug/deps/libaxum-5b075a599251ec28.rlib --extern chrono=/Users/dframe/workspace/rust/wasynch/target/debug/deps/libchrono-569a48d1531b8625.rlib --extern serde=/Users/dframe/workspace/rust/wasynch/target/debug/deps/libserde-05acf80525069f3c.rlib --extern serde_json=/Users/dframe/workspace/rust/wasynch/target/debug/deps/libserde_json-44aad93b62192287.rlib --extern tokio=/Users/dframe/workspace/rust/wasynch/target/debug/deps/libtokio-a3a12b8cda967c06.rlib --extern tokio_cron_scheduler=/Users/dframe/workspace/rust/wasynch/target/debug/deps/libtokio_cron_scheduler-1e5079cd3bfa189d.rlib --extern util=/Users/dframe/workspace/rust/wasynch/target/debug/deps/libutil-9f9741b4c8a2c942.rlib --extern uuid=/Users/dframe/workspace/rust/wasynch/target/debug/deps/libuuid-b37f6432c2a2f39c.rlib` (signal: 6, SIGABRT: process abort signal)

Backtrace

<backtrace>

[agostbiro]

I've managed to repro with this on 1.66.0-nightly (2022-10-25 bed4ad65bf7a1cef39e3)

use tokio::task;

struct StructA {
    b: StructB,
}

impl StructA {
    async fn foo(&self) {
        let bar = self.b.bar().await;
        task::spawn_blocking(move || {
            self.b;
        });
    }
}

struct StructB {}

impl StructB {
    async fn bar(&self) -> Option<u8> {
        None
    }
}

Error output:

thread '<unnamed>' panicked at 'index out of bounds: the len is 4 but the index is 14', compiler/rustc_middle/src/mir/mod.rs:484:27

[agostbiro]

Hi @TaKO8Ki thanks for looking into this issue. I saw you added the "E-needs-mcve" label. Wondering how to improve this example?

[compiler-errors]

@agostbiro that's a sufficient example, I can look into it.