ICE: name of non-Rpitit assoc item

[temofeyBaradax]

Code

use std::marker::PhantomData;

// Minimal code to reproduce ICE in Rust nightly
pub struct ClientError;

pub trait MessageFormat<T> {
    type SerializeError: std::fmt::Debug;
    fn serialize(&self, data: &T) -> Result<Vec<u8>, Self::SerializeError>;
}

pub struct Format<T>(PhantomData<T>);
impl<T> Default for Format<T> { fn default() -> Self { Self(PhantomData) } }
impl<T> MessageFormat<T> for Format<T> {
    type SerializeError = ();
    fn serialize(&self, _: &T) -> Result<Vec<u8>, Self::SerializeError> { Ok(vec![]) }
}

pub trait DefaultFormat { type Formatter: MessageFormat<Self> + Default; }
struct Data {}
impl DefaultFormat for Data { type Formatter = Format<Self>; }

pub struct Client;
trait TypedClient {
    async fn publish_typed<T, F>(&self, data: &T) -> Result<(), ClientError>
    where F: MessageFormat<T> + Default;
}
impl TypedClient for Client {
    async fn publish_typed<T, F>(&self, _: &T) -> Result<(), ClientError>
    where F: MessageFormat<T> + Default { Ok(()) }
}

pub struct Publisher<T: DefaultFormat> { client: Client, _phantom: PhantomData<T> }
impl<T: DefaultFormat> Publisher<T> {
    // Works correctly
    pub async fn publish(&self, data: &T) -> Result<(), ClientError> {
        self.client.publish_typed::<_, T::Formatter>(data).await
    }
    // Triggers ICE in nightly build <- PROBLEM HERE
    pub async fn publish_bug(&self, data: &T) -> Result<(), ClientError> {
        self.client.publish_typed(data).await  // Here the compiler cannot infer type F
    }
}

Meta

rustc --version --verbose:

$ rustc --version --verbose
rustc 1.89.0-nightly (16d2276fa 2025-05-16)
binary: rustc
commit-hash: 16d2276fa6fccb0cc239a542d4c3f0eb46f660ec
commit-date: 2025-05-16
host: x86_64-pc-windows-msvc
release: 1.89.0-nightly
LLVM version: 20.1.4

Error output

<output>

Backtrace

$ RUST_BACKTRACE=1 cargo build
   Compiling mqtt_broker v0.1.0 (C:\Users\tema\live_projects\display_orchestra\mqtt_broker)

thread 'rustc' panicked at compiler\rustc_middle\src\ty\assoc.rs:43:25:
name of non-Rpitit assoc item
stack backtrace:
   0: std::panicking::begin_panic_handler
             at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\std\src\panicking.rs:697
   1: core::panicking::panic_fmt
             at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\core\src\panicking.rs:75
   2: core::panicking::panic_display
             at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\core\src\panicking.rs:268
   3: core::option::expect_failed
             at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\core\src\option.rs:2049
   4: <rustc_middle::ty::assoc::AssocItem>::name
   5: <rustc_trait_selection::error_reporting::TypeErrCtxt>::extract_callable_info
   6: <rustc_middle::traits::ObligationCause as rustc_trait_selection::error_reporting::infer::ObligationCauseExt>::as_failure_code_diag
   7: <rustc_trait_selection::error_reporting::TypeErrCtxt>::report_fulfillment_errors
   8: <rustc_hir_typeck::upvar::InferBorrowKind as rustc_hir_typeck::expr_use_visitor::Delegate>::borrow
   9: rustc_hir_typeck::typeck
  10: rustc_query_impl::plumbing::query_key_hash_verify_all
  11: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
  12: rustc_query_impl::plumbing::query_key_hash_verify_all
  13: rustc_mir_build::thir::pattern::check_match::check_match
  14: rustc_query_impl::plumbing::query_key_hash_verify_all
  15: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
  16: rustc_query_impl::query_system
  17: rustc_mir_build::builder::build_mir
  18: rustc_mir_transform::mir_built
  19: rustc_query_impl::plumbing::query_key_hash_verify_all
  20: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
  21: rustc_query_impl::query_system
  22: rustc_mir_transform::ffi_unwind_calls::has_ffi_unwind_calls
  23: rustc_query_impl::plumbing::query_key_hash_verify_all
  24: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
  25: rustc_query_impl::plumbing::query_key_hash_verify_all
  26: rustc_mir_transform::mir_promoted
  27: rustc_query_impl::plumbing::query_key_hash_verify_all
  28: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
  29: rustc_query_impl::query_system
  30: rustc_borrowck::mir_borrowck
  31: rustc_query_impl::plumbing::query_key_hash_verify_all
  32: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
  33: rustc_query_impl::plumbing::query_key_hash_verify_all
  34: <rustc_hir_analysis::collect::resolve_bound_vars::is_late_bound_map::AllCollector as rustc_hir::intravisit::Visitor>::visit_opaque_ty
  35: <rustc_hir_analysis::collect::resolve_bound_vars::is_late_bound_map::AllCollector as rustc_hir::intravisit::Visitor>::visit_opaque_ty
  36: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id8CrateNumINtNtNtCs6RMfinxcFgq_12
  37: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtB4_6caches10DefIdCacheINtNtNtCs6RMfinxcFgq_12rustc_middle5query5erase6ErasedAhj8_EEKb0_KB3r_KB3r_ENtNtB1f_8plumbing9QueryCtxt
  38: rustc_query_impl::query_system
  39: <rustc_hir_analysis::collect::resolve_bound_vars::is_late_bound_map::ConstrainedCollector as rustc_hir::intravisit::Visitor>::visit_ty
  40: rustc_query_impl::plumbing::query_key_hash_verify_all
  41: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtB4_6caches10DefIdCacheINtNtNtCs6RMfinxcFgq_12rustc_middle5query5erase6ErasedAhj8_EEKb0_KB3r_KB3r_ENtNtB1f_8plumbing9QueryCtxt
  42: rustc_query_impl::plumbing::query_key_hash_verify_all
  43: <rustc_privacy::EmbargoVisitor as rustc_hir::intravisit::Visitor>::visit_item
  44: rustc_privacy::effective_visibilities
  45: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id8CrateNumINtNtNtCs6RMfinxcFgq_12
  46: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtB4_6caches11SingleCacheINtNtNtCs6RMfinxcFgq_12rustc_middle5query5erase6ErasedAhj8_EEKb0_KB3s_KB3s_ENtNtB1f_8plumbing9QueryCtx
  47: rustc_query_impl::query_system
  48: rustc_hir_analysis::check::check::check_abi
  49: rustc_hir_analysis::check::wfcheck::check_well_formed
  50: rustc_query_impl::plumbing::query_key_hash_verify_all
  51: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
  52: rustc_query_impl::plumbing::query_key_hash_verify_all
  53: rustc_hir_analysis::check::wfcheck::check_mod_type_wf
  54: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id8CrateNumINtNtNtCs6RMfinxcFgq_12
  55: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtB4_6caches12DefaultCacheNtNtCs58xKICPkfbi_10rustc_span6def_id13LocalModDefIdINtNtNtCs6RMfinxcFgq_12rustc_middle5query5erase6E
  56: rustc_query_impl::query_system
  57: rustc_hir_analysis::check_crate
  58: <rustc_interface::passes::LintStoreExpandImpl as rustc_expand::base::LintStoreExpand>::pre_expansion_lint
  59: rustc_interface::passes::analysis
  60: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id8CrateNumINtNtNtCs6RMfinxcFgq_12
  61: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtB4_6caches11SingleCacheINtNtNtCs6RMfinxcFgq_12rustc_middle5query5erase6ErasedAhj0_EEKb0_KB3s_KB3s_ENtNtB1f_8plumbing9QueryCtx
  62: rustc_query_impl::query_system
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

error: 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: please make sure that you have updated to the latest nightly

note: please attach the file at `C:\Users\tema\live_projects\display_orchestra\mqtt_broker\rustc-ice-2025-05-17T19_16_26-12760.txt` to your bug report

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 `problem::<impl at src\problem.rs:33:1: 33:36>::publish_bug`
#1 [check_match] match-checking `problem::<impl at src\problem.rs:33:1: 33:36>::publish_bug`
#2 [mir_built] building MIR for `problem::<impl at src\problem.rs:33:1: 33:36>::publish_bug`
#3 [has_ffi_unwind_calls] checking if `problem::<impl at src\problem.rs:33:1: 33:36>::publish_bug` contains FFI-unwind calls
#4 [mir_promoted] promoting constants in MIR for `problem::<impl at src\problem.rs:33:1: 33:36>::publish_bug`
#5 [mir_borrowck] borrow-checking `problem::<impl at src\problem.rs:33:1: 33:36>::publish_bug`
#6 [type_of_opaque] computing type of opaque `problem::<impl at src\problem.rs:33:1: 33:36>::publish_bug::{opaque#0}`
#7 [type_of] computing type of `problem::<impl at src\problem.rs:33:1: 33:36>::publish_bug::{opaque#0}`
#8 [effective_visibilities] checking effective visibilities
#9 [check_well_formed] checking that `<impl at src\main.rs:33:1: 33:37>` is well-formed
#10 [check_mod_type_wf] checking that types are well-formed in top-level module
#11 [analysis] running analysis passes on this crate
end of query stack
note: no errors encountered even though delayed bugs were created

note: those delayed bugs will now be shown as internal compiler errors

error: internal compiler error: {OpaqueTypeKey { def_id: DefId(0:50 ~ mqtt_broker[5bed]::problem::{impl#4}::publish_bug::{opaque#0}), args: [T/#0, ReLateParam(DefId(0:49 ~ mqtt_broker[5bed]::problem::{impl#4}::publish_bug), LateNamed(DefId(0:240 ~ mqtt_broker[5bed]::problem::{impl#4}::publish_bug::'_), '_)), ReLateParam(DefId(0:49 ~ mqtt_broker[5bed]::problem::{impl#4}::publish_bug), LateNamed(DefId(0:241 ~ mqtt_broker[5bed]::problem::{impl#4}::publish_bug::'_#1), '_))] }: OpaqueHiddenType { span: src\problem.rs:39:5: 39:73 (#69), ty: ?0t }}
  |
  = note: delayed at compiler\rustc_infer\src\infer\opaque_types\table.rs:121:43
             0: std::backtrace_rs::backtrace::win64::trace
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\std\src\..\..\backtrace\src\backtrace\win64.rs:85
             1: std::backtrace_rs::backtrace::trace_unsynchronized
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\std\src\..\..\backtrace\src\backtrace\mod.rs:66
             2: std::backtrace::Backtrace::create
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\std\src\backtrace.rs:331
             3: std::backtrace::Backtrace::capture
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\std\src\backtrace.rs:296
             4: <rustc_errors::DiagCtxtHandle>::flush_delayed
             5: <rustc_errors::DiagCtxtHandle>::emit_diagnostic
             6: <rustc_span::ErrorGuaranteed as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee
             7: <hashbrown::raw::RawTable<(rustc_infer::infer::region_constraints::leak_check::LeakCheckScc, ())>>::reserve_rehash::<hashbrown::map::make_hasher<rustc_infer::infer::region_constraints::leak_check::LeakCheckScc, (), rustc_hash::FxBuildHasher>::{closure#0}>
             8: <rustc_infer::infer::opaque_types::table::OpaqueTypeStorage as core::ops::drop::Drop>::drop
             9: RINvMs6_NtCsftUZaTZKFS8_9hashbrown3rawINtB6_8RawTableTNtNtCskemMAiS7hU0_9rustc_hir6hir_id11ItemLocalIdNtNtNtCsiBRRQxmwW46_9rustc_abi6layout2ty8FieldIdxEE14reserve_rehashNCINvNtB8_3map11make_hasherBQ_B1C_NtCs4a4ad12aAro_10rustc_hash13FxBuildHasherE0ECsk0wkf
            10: <hashbrown::raw::RawTable<(usize, ())>>::reserve_rehash::<hashbrown::map::make_hasher<usize, (), rustc_hash::FxBuildHasher>::{closure#0}>
            11: <rustc_hir_typeck::upvar::InferBorrowKind as rustc_hir_typeck::expr_use_visitor::Delegate>::borrow
            12: _CallSettingFrame
                       at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\amd64\handlers.asm:49
            13: __FrameHandler3::FrameUnwindToState
                       at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\frame.cpp:1222
            14: __FrameHandler3::FrameUnwindToEmptyState
                       at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\risctrnsctrl.cpp:255
            15: __InternalCxxFrameHandler<__FrameHandler3>
                       at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\frame.cpp:355
            16: __CxxFrameHandler3
                       at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\risctrnsctrl.cpp:281
            17: _chkstk
            18: RtlUnwindEx
            19: __FrameHandler3::UnwindNestedFrames
                       at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\risctrnsctrl.cpp:759
            20: CatchIt<__FrameHandler3>
                       at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\frame.cpp:1326
            21: FindHandler<__FrameHandler3>
                       at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\frame.cpp:670
            22: __InternalCxxFrameHandler<__FrameHandler3>
                       at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\frame.cpp:396
            23: __CxxFrameHandler3
                       at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\risctrnsctrl.cpp:281
            24: _chkstk
            25: RtlRaiseException
            26: RtlRaiseException
            27: RaiseException
            28: _CxxThrowException
                       at D:\a\_work\1\s\src\vctools\crt\vcruntime\src\eh\throw.cpp:79
            29: panic_unwind::imp::panic
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\panic_unwind\src\seh.rs:355
            30: panic_unwind::__rust_start_panic
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\panic_unwind\src\lib.rs:103
            31: std::panicking::rust_panic
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\std\src\panicking.rs:894
            32: std::panicking::rust_panic_with_hook
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\std\src\panicking.rs:858
            33: std::panicking::begin_panic_handler::closure$0
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\std\src\panicking.rs:706
            34: std::sys::backtrace::__rust_end_short_backtrace<std::panicking::begin_panic_handler::closure_env$0,never$>
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\std\src\sys\backtrace.rs:168
            35: std::panicking::begin_panic_handler
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\std\src\panicking.rs:697
            36: core::panicking::panic_fmt
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\core\src\panicking.rs:75
            37: core::panicking::panic_display
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\core\src\panicking.rs:268
            38: core::option::expect_failed
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\core\src\option.rs:2049
            39: <rustc_middle::ty::assoc::AssocItem>::name
            40: <rustc_trait_selection::error_reporting::TypeErrCtxt>::extract_callable_info
            41: <rustc_middle::traits::ObligationCause as rustc_trait_selection::error_reporting::infer::ObligationCauseExt>::as_failure_code_diag
            42: <rustc_trait_selection::error_reporting::TypeErrCtxt>::report_fulfillment_errors
            43: <rustc_hir_typeck::upvar::InferBorrowKind as rustc_hir_typeck::expr_use_visitor::Delegate>::borrow
            44: rustc_hir_typeck::typeck
            45: rustc_query_impl::plumbing::query_key_hash_verify_all
            46: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
            47: rustc_query_impl::plumbing::query_key_hash_verify_all
            48: rustc_mir_build::thir::pattern::check_match::check_match
            49: rustc_query_impl::plumbing::query_key_hash_verify_all
            50: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
            51: rustc_query_impl::query_system
            52: rustc_mir_build::builder::build_mir
            53: rustc_mir_transform::mir_built
            54: rustc_query_impl::plumbing::query_key_hash_verify_all
            55: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
            56: rustc_query_impl::query_system
            57: rustc_mir_transform::ffi_unwind_calls::has_ffi_unwind_calls
            58: rustc_query_impl::plumbing::query_key_hash_verify_all
            59: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
            60: rustc_query_impl::plumbing::query_key_hash_verify_all
            61: rustc_mir_transform::mir_promoted
            62: rustc_query_impl::plumbing::query_key_hash_verify_all
            63: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
            64: rustc_query_impl::query_system
            65: rustc_borrowck::mir_borrowck
            66: rustc_query_impl::plumbing::query_key_hash_verify_all
            67: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
            68: rustc_query_impl::plumbing::query_key_hash_verify_all
            69: <rustc_hir_analysis::collect::resolve_bound_vars::is_late_bound_map::AllCollector as rustc_hir::intravisit::Visitor>::visit_opaque_ty
            70: <rustc_hir_analysis::collect::resolve_bound_vars::is_late_bound_map::AllCollector as rustc_hir::intravisit::Visitor>::visit_opaque_ty
            71: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id8CrateNumINtNtNtCs6RMfinxcFgq_12
            72: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtB4_6caches10DefIdCacheINtNtNtCs6RMfinxcFgq_12rustc_middle5query5erase6ErasedAhj8_EEKb0_KB3r_KB3r_ENtNtB1f_8plumbing9QueryCtxt
            73: rustc_query_impl::query_system
            74: <rustc_hir_analysis::collect::resolve_bound_vars::is_late_bound_map::ConstrainedCollector as rustc_hir::intravisit::Visitor>::visit_ty
            75: rustc_query_impl::plumbing::query_key_hash_verify_all
            76: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtB4_6caches10DefIdCacheINtNtNtCs6RMfinxcFgq_12rustc_middle5query5erase6ErasedAhj8_EEKb0_KB3r_KB3r_ENtNtB1f_8plumbing9QueryCtxt
            77: rustc_query_impl::plumbing::query_key_hash_verify_all
            78: <rustc_privacy::EmbargoVisitor as rustc_hir::intravisit::Visitor>::visit_item
            79: rustc_privacy::effective_visibilities
            80: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id8CrateNumINtNtNtCs6RMfinxcFgq_12
            81: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtB4_6caches11SingleCacheINtNtNtCs6RMfinxcFgq_12rustc_middle5query5erase6ErasedAhj8_EEKb0_KB3s_KB3s_ENtNtB1f_8plumbing9QueryCtx
            82: rustc_query_impl::query_system
            83: rustc_hir_analysis::check::check::check_abi
            84: rustc_hir_analysis::check::wfcheck::check_well_formed
            85: rustc_query_impl::plumbing::query_key_hash_verify_all
            86: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id10LocalDefIdINtNtNtCs6RMfinxcFgq
            87: rustc_query_impl::plumbing::query_key_hash_verify_all
            88: rustc_hir_analysis::check::wfcheck::check_mod_type_wf
            89: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id8CrateNumINtNtNtCs6RMfinxcFgq_12
            90: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtB4_6caches12DefaultCacheNtNtCs58xKICPkfbi_10rustc_span6def_id13LocalModDefIdINtNtNtCs6RMfinxcFgq_12rustc_middle5query5erase6E
            91: rustc_query_impl::query_system
            92: rustc_hir_analysis::check_crate
            93: <rustc_interface::passes::LintStoreExpandImpl as rustc_expand::base::LintStoreExpand>::pre_expansion_lint
            94: rustc_interface::passes::analysis
            95: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtCskJc15ZtcHlN_21rustc_data_structures9vec_cache8VecCacheNtNtCs58xKICPkfbi_10rustc_span6def_id8CrateNumINtNtNtCs6RMfinxcFgq_12
            96: RINvNtNtCsceq9HnlmPNX_18rustc_query_system5query8plumbing17try_execute_queryINtCsgtgSloM9rKF_16rustc_query_impl13DynamicConfigINtNtB4_6caches11SingleCacheINtNtNtCs6RMfinxcFgq_12rustc_middle5query5erase6ErasedAhj0_EEKb0_KB3s_KB3s_ENtNtB1f_8plumbing9QueryCtx
            97: rustc_query_impl::query_system
            98: std::sys::backtrace::__rust_begin_short_backtrace::<<std::thread::Builder>::spawn_unchecked_<ctrlc::set_handler_inner<rustc_driver_impl::install_ctrlc_handler::{closure#0}>::{closure#0}, ()>::{closure#1}::{closure#0}::{closure#0}, ()>
            99: std::sys::backtrace::__rust_begin_short_backtrace::<<std::thread::Builder>::spawn_unchecked_<ctrlc::set_handler_inner<rustc_driver_impl::install_ctrlc_handler::{closure#0}>::{closure#0}, ()>::{closure#1}::{closure#0}::{closure#0}, ()>
           100: RINvNtNtCs6g9X9TJcoew_3std3sys9backtrace28___rust_begin_short_backtraceNCNCINvNtCs3G1pbMWZRnv_15rustc_interface4util26run_in_thread_with_globalsNCINvB1e_31run_in_thread_pool_with_globalsNCINvNtB1g_9interface12run_compileruNCNvCsgJSkwfkFLox_17rustc_driver_i
           101: std::sys::backtrace::__rust_begin_short_backtrace::<<std::thread::Builder>::spawn_unchecked_<ctrlc::set_handler_inner<rustc_driver_impl::install_ctrlc_handler::{closure#0}>::{closure#0}, ()>::{closure#1}::{closure#0}::{closure#0}, ()>
           102: alloc::boxed::impl$28::call_once
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\alloc\src\boxed.rs:1966
           103: alloc::boxed::impl$28::call_once
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\alloc\src\boxed.rs:1966
           104: std::sys::pal::windows::thread::impl$0::new::thread_start
                       at /rustc/16d2276fa6fccb0cc239a542d4c3f0eb46f660ec/library\std\src\sys\pal\windows\thread.rs:56
           105: BaseThreadInitThunk
           106: RtlUserThreadStart


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: please make sure that you have updated to the latest nightly

note: please attach the file at `C:\Users\tema\live_projects\display_orchestra\mqtt_broker\rustc-ice-2025-05-17T19_16_26-12760.txt` to your bug report

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:
end of query stack
error: could not compile `mqtt_broker` (bin "mqtt_broker")

Caused by:
  process didn't exit successfully: `C:\Users\tema\.rustup\toolchains\nightly-x86_64-pc-windows-msvc\bin\rustc.exe --crate-name mqtt_broker --edition=2024 'src\main.rs' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=159 --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=3f7608296271e745 --out-dir 'C:\Users\tema\live_projects\display_orchestra\mqtt_broker\target\debug\deps' -C 'incremental=C:\Users\tema\live_projects\display_orchestra\mqtt_broker\target\debug\incremental' -L 'dependency=C:\Users\tema\live_projects\display_orchestra\mqtt_broker\target\debug\deps' --extern 'bincode=C:\Users\tema\live_projects\display_orchestra\mqtt_broker\target\debug\deps\libbincode-106608e7105102e2.rlib' --extern 'rumqttc=C:\Users\tema\live_projects\display_orchestra\mqtt_broker\target\debug\deps\librumqttc-74429b055bad0bb5.rlib' --extern 'serde=C:\Users\tema\live_projects\display_orchestra\mqtt_broker\target\debug\deps\libserde-a3854178147d9026.rlib' --extern 'tokio=C:\Users\tema\live_projects\display_orchestra\mqtt_broker\target\debug\deps\libtokio-a74eced2e299292e.rlib' -L 'native=C:\Users\tema\live_projects\display_orchestra\mqtt_broker\target\debug\build\ring-141d77b392aa9d65\out' -L 'native=C:\Users\tema\.cargo\registry\src\index.crates.io-1949cf8c6b5b557f\windows_x86_64_msvc-0.52.6\lib'` (exit code: 101)

[moxian]

• bisects to rust-lang-ci@074b518 / Overhaul AssocItem #139669 ; cc @nnethercote

The example does not look truly minimal, and it would be nice to trim it down a bit further..

@rustbot label: +A-impl-trait +A-associated-items -needs-triage

[cyrgani]

trait TypedClient {
    fn publish_typed<F>(&self) -> impl Sized
    where
        F: Clone;
}
impl TypedClient for () {
    fn publish_typed<F>(&self) -> impl Sized {}
}

fn main() {
    ().publish_typed();
}

@rustbot label S-has-mcve -E-needs-mcve