'rustc' panicked at 'index out of bounds: the len is 385 but the index is 386'

[kaweston]

Code

I don't have an example yet; I'm pretty new to Rust. Given the output indicates that the entry_points::apigateway::create_token_set function is being type checked hopefully the following code snippets will be of assistance.

I do have another code base that I largely borrowed from where the signature is nearly the same other than the parameter being passed as &dyn (&dyn StorageService) now has an implementation that contains a Box (see code below).

use lambda_http::{http::StatusCode, IntoResponse, Request, RequestExt, Response};
use crate::clients::function::StorageService;

type E = Box<dyn std::error::Error + Send + Sync + 'static>;

pub async fn create_token_set(storage_service_client: &dyn StorageService,
                              request: Request) -> Result<impl IntoResponse, E> {
...
}

#[async_trait]
pub trait StorageService: Send + Sync {

    async fn store(&self, data: &PreAuthData) -> Result<TokenResult, Error>;

}
// is implemented by
pub struct StorageServiceClient {
    http_client: Client,
    service_discovery_client: Box<dyn ServiceDiscovery>
}


#[async_trait]
pub trait ServiceDiscovery: Send + Sync {
    async fn instances(&self, service_name: &str) -> Result<ServiceInstances, Error>;
}
// is implemented by
pub struct CloudMapClient {
    pub client: Client,
    pub namespace: String,
}


#[derive(Debug, Serialize)]
pub struct PreAuthData {
    #[serde(rename="ttlSeconds")]
    pub ttl_seconds: u64,
    pub data: HashMap<String, String>,
}

#[derive(Debug, Serialize, Deserialize)]
pub struct TokenResult {
    pub token: String,
}

Meta

rustc --version --verbose:

rustc 1.64.0 (a55dd71d5 2022-09-19)
binary: rustc
commit-hash: a55dd71d5fb0ec5a6a3a9e8c27b2127ba491ce52
commit-date: 2022-09-19
host: x86_64-apple-darwin
release: 1.64.0
LLVM version: 14.0.6

Error output

RUST_BACKTRACE=full	 cargo lambda build --release --target aarch64-unknown-linux-gnu
   Compiling synchronizer-service v0.1.0 (/Users/kweston/Development/Work/passion_project/synchronizer-service)
thread 'rustc' panicked at 'index out of bounds: the len is 385 but the index is 386', /Users/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/ena-0.14.0/src/snapshot_vec.rs:199:10

Backtrace

stack backtrace:
   0:        0x10e28f5c4 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h7d80e14dd19335c9
   1:        0x10e2e768b - core::fmt::write::h1709d0255080e28a
   2:        0x10e281fe8 - std::io::Write::write_fmt::hecc56b5639d319e7
   3:        0x10e29289d - std::panicking::default_hook::{{closure}}::had4d1cd22a173020
   4:        0x10e2925ee - std::panicking::default_hook::h42aa124509888735
   5:        0x11acdb73a - rustc_driver[b232a614d5c482d6]::DEFAULT_HOOK::{closure#0}::{closure#0}
   6:        0x10e292f0b - std::panicking::rust_panic_with_hook::h2b231e816574a23a
   7:        0x10e292d83 - std::panicking::begin_panic_handler::{{closure}}::h9da8d88b7a4c9d5e
   8:        0x10e28fa47 - std::sys_common::backtrace::__rust_end_short_backtrace::h10dbf1377dfaf877
   9:        0x10e292a5a - _rust_begin_unwind
  10:        0x10e312943 - core::panicking::panic_fmt::hde1544b10dc8b4d3
  11:        0x10e312896 - core::panicking::panic_bounds_check::h094d1d5f121a5074
  12:        0x11f11a7dd - <rustc_infer[daf5aaa74dbe2ea7]::infer::type_variable::TypeVariableTable>::probe
  13:        0x11f09223c - <rustc_infer[daf5aaa74dbe2ea7]::infer::ShallowResolver as rustc_middle[77b05d97adc105c3]::ty::fold::TypeFolder>::fold_ty
  14:        0x11f14275f - <rustc_middle[77b05d97adc105c3]::ty::Ty as rustc_middle[77b05d97adc105c3]::ty::fold::TypeSuperFoldable>::super_fold_with::<rustc_infer[daf5aaa74dbe2ea7]::infer::resolve::OpportunisticVarResolver>
  15:        0x11f08abbb - <rustc_infer[daf5aaa74dbe2ea7]::infer::InferCtxt>::same_type_modulo_infer
  16:        0x11f09567a - <rustc_infer[daf5aaa74dbe2ea7]::infer::InferCtxt>::note_type_err
  17:        0x11f086eba - <rustc_infer[daf5aaa74dbe2ea7]::infer::InferCtxt>::report_and_explain_type_error
  18:        0x11d748b7e - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::report_arg_errors
  19:        0x11d744d3e - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_argument_types
  20:        0x11d720195 - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::confirm_builtin_call
  21:        0x11d71d72f - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_call
  22:        0x11d78233b - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_kind
  23:        0x11d733ead - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  24:        0x11d77c1ed - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_match
  25:        0x11d782300 - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_kind
  26:        0x11d733ead - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  27:        0x11d74b0e8 - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_block_with_expected
  28:        0x11d782764 - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_kind
  29:        0x11d733ead - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  30:        0x11d781c1c - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_kind
  31:        0x11d733ead - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  32:        0x11d74b0e8 - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_block_with_expected
  33:        0x11d782764 - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_kind
  34:        0x11d733ead - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  35:        0x11d735027 - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_return_expr
  36:        0x11d802eb0 - rustc_typeck[bd9bb7cc16f9c2e5]::check::check::check_fn
  37:        0x11d77ee85 - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_closure
  38:        0x11d781a30 - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_kind
  39:        0x11d733ead - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  40:        0x11d743fb5 - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_argument_types
  41:        0x11d720195 - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::confirm_builtin_call
  42:        0x11d71d72f - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_call
  43:        0x11d78233b - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_kind
  44:        0x11d733ead - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  45:        0x11d735027 - <rustc_typeck[bd9bb7cc16f9c2e5]::check::fn_ctxt::FnCtxt>::check_return_expr
  46:        0x11d802eb0 - rustc_typeck[bd9bb7cc16f9c2e5]::check::check::check_fn
  47:        0x11d9411da - <rustc_infer[daf5aaa74dbe2ea7]::infer::InferCtxtBuilder>::enter::<&rustc_middle[77b05d97adc105c3]::ty::context::TypeckResults, <rustc_typeck[bd9bb7cc16f9c2e5]::check::inherited::InheritedBuilder>::enter<rustc_typeck[bd9bb7cc16f9c2e5]::check::typeck_with_fallback<rustc_typeck[bd9bb7cc16f9c2e5]::check::typeck::{closure#0}>::{closure#1}, &rustc_middle[77b05d97adc105c3]::ty::context::TypeckResults>::{closure#0}>
  48:        0x11d8dfec6 - rustc_typeck[bd9bb7cc16f9c2e5]::check::typeck
  49:        0x11e3254d5 - rustc_query_system[923812efe1d06df6]::query::plumbing::try_execute_query::<rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt, rustc_query_system[923812efe1d06df6]::query::caches::DefaultCache<rustc_span[dadb10719d06531]::def_id::LocalDefId, &rustc_middle[77b05d97adc105c3]::ty::context::TypeckResults>>
  50:        0x11e41d23e - rustc_query_system[923812efe1d06df6]::query::plumbing::get_query::<rustc_query_impl[1fb0f992e528a50]::queries::typeck, rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt>
  51:        0x11f212849 - <rustc_middle[77b05d97adc105c3]::ty::context::TyCtxt>::typeck_opt_const_arg
  52:        0x11dc87e79 - rustc_mir_build[56ad5059c19cf785]::build::mir_built
  53:        0x11e304518 - rustc_query_system[923812efe1d06df6]::query::plumbing::try_execute_query::<rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt, rustc_query_system[923812efe1d06df6]::query::caches::DefaultCache<rustc_middle[77b05d97adc105c3]::ty::WithOptConstParam<rustc_span[dadb10719d06531]::def_id::LocalDefId>, &rustc_data_structures[9d9aca487cd3f5bb]::steal::Steal<rustc_middle[77b05d97adc105c3]::mir::Body>>>
  54:        0x11e41fa0e - rustc_query_system[923812efe1d06df6]::query::plumbing::get_query::<rustc_query_impl[1fb0f992e528a50]::queries::mir_built, rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt>
  55:        0x11e6c3e07 - <rustc_query_impl[1fb0f992e528a50]::Queries as rustc_middle[77b05d97adc105c3]::ty::query::QueryEngine>::mir_built
  56:        0x11d4ce982 - rustc_mir_transform[ff588deea2a29d33]::check_unsafety::unsafety_check_result
  57:        0x11d4c9933 - <rustc_mir_transform[ff588deea2a29d33]::check_unsafety::provide::{closure#0} as core[ccfd6f2964525339]::ops::function::FnOnce<(rustc_middle[77b05d97adc105c3]::ty::context::TyCtxt, rustc_span[dadb10719d06531]::def_id::LocalDefId)>>::call_once
  58:        0x11e327255 - rustc_query_system[923812efe1d06df6]::query::plumbing::try_execute_query::<rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt, rustc_query_system[923812efe1d06df6]::query::caches::DefaultCache<rustc_span[dadb10719d06531]::def_id::LocalDefId, &rustc_middle[77b05d97adc105c3]::mir::query::UnsafetyCheckResult>>
  59:        0x11e402d0e - rustc_query_system[923812efe1d06df6]::query::plumbing::get_query::<rustc_query_impl[1fb0f992e528a50]::queries::unsafety_check_result, rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt>
  60:        0x11d3ab51c - rustc_mir_transform[ff588deea2a29d33]::mir_const
  61:        0x11e304518 - rustc_query_system[923812efe1d06df6]::query::plumbing::try_execute_query::<rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt, rustc_query_system[923812efe1d06df6]::query::caches::DefaultCache<rustc_middle[77b05d97adc105c3]::ty::WithOptConstParam<rustc_span[dadb10719d06531]::def_id::LocalDefId>, &rustc_data_structures[9d9aca487cd3f5bb]::steal::Steal<rustc_middle[77b05d97adc105c3]::mir::Body>>>
  62:        0x11e41fb4b - rustc_query_system[923812efe1d06df6]::query::plumbing::get_query::<rustc_query_impl[1fb0f992e528a50]::queries::mir_const, rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt>
  63:        0x11e6c3e37 - <rustc_query_impl[1fb0f992e528a50]::Queries as rustc_middle[77b05d97adc105c3]::ty::query::QueryEngine>::mir_const
  64:        0x11d3ac072 - rustc_mir_transform[ff588deea2a29d33]::mir_promoted
  65:        0x11e3e5734 - rustc_query_system[923812efe1d06df6]::query::plumbing::get_query::<rustc_query_impl[1fb0f992e528a50]::queries::mir_promoted, rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt>
  66:        0x11e6c3fb7 - <rustc_query_impl[1fb0f992e528a50]::Queries as rustc_middle[77b05d97adc105c3]::ty::query::QueryEngine>::mir_promoted
  67:        0x11dee43ac - rustc_borrowck[2325aa70b5af3c05]::mir_borrowck
  68:        0x11deb9893 - <rustc_borrowck[2325aa70b5af3c05]::provide::{closure#0} as core[ccfd6f2964525339]::ops::function::FnOnce<(rustc_middle[77b05d97adc105c3]::ty::context::TyCtxt, rustc_span[dadb10719d06531]::def_id::LocalDefId)>>::call_once
  69:        0x11e326395 - rustc_query_system[923812efe1d06df6]::query::plumbing::try_execute_query::<rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt, rustc_query_system[923812efe1d06df6]::query::caches::DefaultCache<rustc_span[dadb10719d06531]::def_id::LocalDefId, &rustc_middle[77b05d97adc105c3]::mir::query::BorrowCheckResult>>
  70:        0x11e3e50b3 - rustc_query_system[923812efe1d06df6]::query::plumbing::get_query::<rustc_query_impl[1fb0f992e528a50]::queries::mir_borrowck, rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt>
  71:        0x11d98ba02 - rustc_typeck[bd9bb7cc16f9c2e5]::collect::type_of::find_opaque_ty_constraints_for_rpit
  72:        0x11d98ac3c - rustc_typeck[bd9bb7cc16f9c2e5]::collect::type_of::type_of
  73:        0x11e33ed83 - rustc_query_system[923812efe1d06df6]::query::plumbing::try_execute_query::<rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt, rustc_query_system[923812efe1d06df6]::query::caches::DefaultCache<rustc_span[dadb10719d06531]::def_id::DefId, rustc_middle[77b05d97adc105c3]::ty::Ty>>
  74:        0x11e41d500 - rustc_query_system[923812efe1d06df6]::query::plumbing::get_query::<rustc_query_impl[1fb0f992e528a50]::queries::type_of, rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt>
  75:        0x11d7eda7f - rustc_typeck[bd9bb7cc16f9c2e5]::check::check::check_opaque
  76:        0x11d7ef8cf - rustc_typeck[bd9bb7cc16f9c2e5]::check::check::check_item_type
  77:        0x11d7f7d7e - rustc_typeck[bd9bb7cc16f9c2e5]::check::check::check_mod_item_types
  78:        0x11e328f9e - rustc_query_system[923812efe1d06df6]::query::plumbing::try_execute_query::<rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt, rustc_query_system[923812efe1d06df6]::query::caches::DefaultCache<rustc_span[dadb10719d06531]::def_id::LocalDefId, ()>>
  79:        0x11e3fc74b - rustc_query_system[923812efe1d06df6]::query::plumbing::get_query::<rustc_query_impl[1fb0f992e528a50]::queries::check_mod_item_types, rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt>
  80:        0x11d99a6a9 - <rustc_session[3f62dfdbb5354e46]::session::Session>::time::<(), rustc_typeck[bd9bb7cc16f9c2e5]::check_crate::{closure#6}>
  81:        0x11d93030d - rustc_typeck[bd9bb7cc16f9c2e5]::check_crate
  82:        0x11ad838ea - rustc_interface[f8b8cf4f770498c1]::passes::analysis
  83:        0x11e376809 - rustc_query_system[923812efe1d06df6]::query::plumbing::try_execute_query::<rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt, rustc_query_system[923812efe1d06df6]::query::caches::DefaultCache<(), core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>>
  84:        0x11e41d61f - rustc_query_system[923812efe1d06df6]::query::plumbing::get_query::<rustc_query_impl[1fb0f992e528a50]::queries::analysis, rustc_query_impl[1fb0f992e528a50]::plumbing::QueryCtxt>
  85:        0x11ac8ca22 - <rustc_interface[f8b8cf4f770498c1]::passes::QueryContext>::enter::<rustc_driver[b232a614d5c482d6]::run_compiler::{closure#1}::{closure#2}::{closure#3}, core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>
  86:        0x11ac6c3e3 - <rustc_interface[f8b8cf4f770498c1]::interface::Compiler>::enter::<rustc_driver[b232a614d5c482d6]::run_compiler::{closure#1}::{closure#2}, core[ccfd6f2964525339]::result::Result<core[ccfd6f2964525339]::option::Option<rustc_interface[f8b8cf4f770498c1]::queries::Linker>, rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>
  87:        0x11acc1398 - rustc_span[dadb10719d06531]::with_source_map::<core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>, rustc_interface[f8b8cf4f770498c1]::interface::create_compiler_and_run<core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>, rustc_driver[b232a614d5c482d6]::run_compiler::{closure#1}>::{closure#1}>
  88:        0x11ac6d039 - <scoped_tls[48db78d854efead3]::ScopedKey<rustc_span[dadb10719d06531]::SessionGlobals>>::set::<rustc_interface[f8b8cf4f770498c1]::interface::run_compiler<core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>, rustc_driver[b232a614d5c482d6]::run_compiler::{closure#1}>::{closure#0}, core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>
  89:        0x11ac8fb99 - std[2c17b0a3fe477be8]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[f8b8cf4f770498c1]::util::run_in_thread_pool_with_globals<rustc_interface[f8b8cf4f770498c1]::interface::run_compiler<core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>, rustc_driver[b232a614d5c482d6]::run_compiler::{closure#1}>::{closure#0}, core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>::{closure#0}, core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>
  90:        0x11ac903c1 - <<std[2c17b0a3fe477be8]::thread::Builder>::spawn_unchecked_<rustc_interface[f8b8cf4f770498c1]::util::run_in_thread_pool_with_globals<rustc_interface[f8b8cf4f770498c1]::interface::run_compiler<core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>, rustc_driver[b232a614d5c482d6]::run_compiler::{closure#1}>::{closure#0}, core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>::{closure#0}, core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>::{closure#1} as core[ccfd6f2964525339]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  91:        0x10e29c457 - std::sys::unix::thread::Thread::new::thread_start::h76e6c1c658a39a87
  92:     0x7ff8071614e1 - __pthread_start

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 1.64.0 (a55dd71d5 2022-09-19) running on x86_64-apple-darwin

note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -C linker=/Users/kweston/Library/Caches/cargo-zigbuild/0.11.3/zigcc-aarch64-unknown-linux-gnu.sh -C strip=symbols -C target-cpu=neoverse-n1

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

query stack during panic:
#0 [typeck] type-checking `entry_points::apigateway::create_token_set`
#1 [mir_built] building MIR for `entry_points::apigateway::create_token_set`
#2 [unsafety_check_result] unsafety-checking `entry_points::apigateway::create_token_set`
#3 [mir_const] processing MIR for `entry_points::apigateway::create_token_set`
#4 [mir_promoted] processing `entry_points::apigateway::create_token_set`
#5 [mir_borrowck] borrow-checking `entry_points::apigateway::create_token_set`
#6 [type_of] computing type of `entry_points::apigateway::create_token_set::{opaque#0}`
#7 [check_mod_item_types] checking item types in module `entry_points::apigateway`
#8 [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: VecMap([(OpaqueTypeKey { def_id: DefId(0:426 ~ synchronizer_service[f58d]::entry_points::apigateway::create_token_set::{opaque#0}), substs: [ReFree(DefId(0:425 ~ synchronizer_service[f58d]::entry_points::apigateway::create_token_set), BrNamed(DefId(0:3670 ~ synchronizer_service[f58d]::entry_points::apigateway::create_token_set::'_#3), '_))] }, OpaqueTypeDecl { hidden_type: OpaqueHiddenType { span: src/entry_points/apigateway/mod.rs:16:52: 16:80 (#2939), ty: _ }, origin: AsyncFn(DefId(0:425 ~ synchronizer_service[f58d]::entry_points::apigateway::create_token_set)) }), (OpaqueTypeKey { def_id: DefId(0:427 ~ synchronizer_service[f58d]::entry_points::apigateway::create_token_set::{opaque#0}::{opaque#0}), substs: [] }, OpaqueTypeDecl { hidden_type: OpaqueHiddenType { span: src/entry_points/apigateway/mod.rs:16:81: 37:2 (#0), ty: _ }, origin: FnReturn(DefId(0:425 ~ synchronizer_service[f58d]::entry_points::apigateway::create_token_set)) })])
  |
  = note: delayed at compiler/rustc_infer/src/infer/opaque_types/table.rs:50:26

thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1426:13
stack backtrace:
   0:        0x10e28f5c4 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h7d80e14dd19335c9
   1:        0x10e2e768b - core::fmt::write::h1709d0255080e28a
   2:        0x10e281fe8 - std::io::Write::write_fmt::hecc56b5639d319e7
   3:        0x10e29289d - std::panicking::default_hook::{{closure}}::had4d1cd22a173020
   4:        0x10e2925ee - std::panicking::default_hook::h42aa124509888735
   5:        0x11acdb73a - rustc_driver[b232a614d5c482d6]::DEFAULT_HOOK::{closure#0}::{closure#0}
   6:        0x10e292f0b - std::panicking::rust_panic_with_hook::h2b231e816574a23a
   7:        0x11f4a7687 - std[2c17b0a3fe477be8]::panicking::begin_panic::<rustc_errors[7d8f39c483a9ccdf]::ExplicitBug>::{closure#0}
   8:        0x11f4a7439 - std[2c17b0a3fe477be8]::sys_common::backtrace::__rust_end_short_backtrace::<std[2c17b0a3fe477be8]::panicking::begin_panic<rustc_errors[7d8f39c483a9ccdf]::ExplicitBug>::{closure#0}, !>
   9:        0x11f8472c9 - std[2c17b0a3fe477be8]::panicking::begin_panic::<rustc_errors[7d8f39c483a9ccdf]::ExplicitBug>
  10:        0x11f4dbf49 - std[2c17b0a3fe477be8]::panic::panic_any::<rustc_errors[7d8f39c483a9ccdf]::ExplicitBug>
  11:        0x11f4e0c4a - <rustc_errors[7d8f39c483a9ccdf]::HandlerInner as core[ccfd6f2964525339]::ops::drop::Drop>::drop
  12:        0x11ac5da5a - core[ccfd6f2964525339]::ptr::drop_in_place::<rustc_session[3f62dfdbb5354e46]::parse::ParseSess>
  13:        0x11ac64e9a - <alloc[a79849253dbb7549]::rc::Rc<rustc_session[3f62dfdbb5354e46]::session::Session> as core[ccfd6f2964525339]::ops::drop::Drop>::drop
  14:        0x11acc3e72 - core[ccfd6f2964525339]::ptr::drop_in_place::<rustc_interface[f8b8cf4f770498c1]::interface::Compiler>
  15:        0x11acc1a23 - rustc_span[dadb10719d06531]::with_source_map::<core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>, rustc_interface[f8b8cf4f770498c1]::interface::create_compiler_and_run<core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>, rustc_driver[b232a614d5c482d6]::run_compiler::{closure#1}>::{closure#1}>
  16:        0x11ac6d039 - <scoped_tls[48db78d854efead3]::ScopedKey<rustc_span[dadb10719d06531]::SessionGlobals>>::set::<rustc_interface[f8b8cf4f770498c1]::interface::run_compiler<core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>, rustc_driver[b232a614d5c482d6]::run_compiler::{closure#1}>::{closure#0}, core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>
  17:        0x11ac8fb99 - std[2c17b0a3fe477be8]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[f8b8cf4f770498c1]::util::run_in_thread_pool_with_globals<rustc_interface[f8b8cf4f770498c1]::interface::run_compiler<core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>, rustc_driver[b232a614d5c482d6]::run_compiler::{closure#1}>::{closure#0}, core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>::{closure#0}, core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>
  18:        0x11ac903c1 - <<std[2c17b0a3fe477be8]::thread::Builder>::spawn_unchecked_<rustc_interface[f8b8cf4f770498c1]::util::run_in_thread_pool_with_globals<rustc_interface[f8b8cf4f770498c1]::interface::run_compiler<core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>, rustc_driver[b232a614d5c482d6]::run_compiler::{closure#1}>::{closure#0}, core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>::{closure#0}, core[ccfd6f2964525339]::result::Result<(), rustc_errors[7d8f39c483a9ccdf]::ErrorGuaranteed>>::{closure#1} as core[ccfd6f2964525339]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  19:        0x10e29c457 - std::sys::unix::thread::Thread::new::thread_start::h76e6c1c658a39a87
  20:     0x7ff8071614e1 - __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 1.64.0 (a55dd71d5 2022-09-19) running on x86_64-apple-darwin

note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -C linker=/Users/kweston/Library/Caches/cargo-zigbuild/0.11.3/zigcc-aarch64-unknown-linux-gnu.sh -C strip=symbols -C target-cpu=neoverse-n1

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

query stack during panic:
end of query stack
thread panicked while panicking. aborting.
error: could not compile `synchronizer-service`

Caused by:
  process didn't exit successfully: `rustc --crate-name synchronizer_service --edition=2021 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no -C metadata=f6c620fc4a9708bc -C extra-filename=-f6c620fc4a9708bc --out-dir /Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps --target aarch64-unknown-linux-gnu -C linker=/Users/kweston/Library/Caches/cargo-zigbuild/0.11.3/zigcc-aarch64-unknown-linux-gnu.sh -L dependency=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps -L dependency=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/release/deps --extern async_trait=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/release/deps/libasync_trait-b895c7d2fe4a607e.dylib --extern aws_config=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libaws_config-518bdd19ff5c6473.rmeta --extern aws_sdk_apigatewaymanagement=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libaws_sdk_apigatewaymanagement-fbe55848f9e17b64.rmeta --extern aws_sdk_dynamodb=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libaws_sdk_dynamodb-468941c6fb61a8a6.rmeta --extern aws_sdk_lambda=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libaws_sdk_lambda-ae71efe6221a9f83.rmeta --extern aws_sdk_servicediscovery=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libaws_sdk_servicediscovery-f8e657becbb38f44.rmeta --extern aws_smithy_http=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libaws_smithy_http-d9a5156069b130c7.rmeta --extern aws_types=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libaws_types-37016b094efdcc35.rmeta --extern aws_lambda_events=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libaws_lambda_events-c6e8272a1e2048c5.rmeta --extern base64=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libbase64-e51bbf2d3f46b6b7.rmeta --extern chrono=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libchrono-75a6f14fc9e1bb43.rmeta --extern jsonwebtoken=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libjsonwebtoken-209720fc8b32e636.rmeta --extern lambda_http=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/liblambda_http-f0fb82304ca744cb.rmeta --extern lambda_runtime=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/liblambda_runtime-3e7ff303d0ee6596.rmeta --extern reqwest=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libreqwest-413e196d8132d4ac.rmeta --extern serde=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libserde-ac851e84548674de.rmeta --extern serde_json=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libserde_json-3b863ff80b633bca.rmeta --extern tokio=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libtokio-7bfa8d96576b4aeb.rmeta --extern tracing=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libtracing-5ddd1f4fd8a3b438.rmeta --extern tracing_subscriber=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/libtracing_subscriber-0137eaf45d5e75a0.rmeta --extern url=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/deps/liburl-2c67357d03468464.rmeta -C strip=symbols -C target-cpu=neoverse-n1 -L native=/Users/kweston/Development/Work/passion_project/synchronizer-service/target/aarch64-unknown-linux-gnu/release/build/ring-282b8a5e6ab5bd6b/out` (signal: 6, SIGABRT: process abort signal)

[kaweston]

Found code problems triggering the compiler issue. Below is the before and after snippets of the last code block of the create_token_set function. Note the changes on line 1 where there was a missing .await?, Line 2 now requiring the turbofish, and line 4 where the return value needed to be wrapped in Ok().

I note that the Intellij editor wasn't flagging these as errors/warnings even with the Clippy linter turned on. Actually the need for the turbofish was highlighted after fixing line 1.

let token_set = service::core::create_token_set(storage_service_client, session_id);
match serde_json::to_string(token_set) {
    Ok(token_set) => Ok(response(StatusCode::OK, token_set)),
    Err(_) => error_response(&InternalError(ConstMsg("Problem serializing response")))
}


let token_set = service::core::create_token_set(storage_service_client, session_id).await?;
match serde_json::to_string::<TokenSet>(&token_set) {
    Ok(token_set) => Ok(response(StatusCode::OK, token_set)),
    Err(error) => Ok(error_response(&InternalError(FormattedMsg(format!("Problem serializing response: {}", error)))))
}

[compiler-errors]

This is a bug that will get fixed with the next release of rustc, I think!

[compiler-errors]

I'm gonna close this since it's fixed (by #99928) which is now on stable.