[ICEs]: generic_const_exprs

[matthiaskrgr]

Code

// ./tests/ui/inline-const/const-expr-generic-err2.rs

#![feature(inline_const)]

fn foo<T>() {
    let _ = [0u8; const { std::mem::size_of::<T>() }];
    //~^ ERROR: constant expression depends on a generic parameter
}

fn main() {
    foo::<i32>();
}

Affected release channels

• Previous Stable
• Current Stable
• Current Beta
• Current Nightly

Rust Version

rustc 1.68.0-nightly (9e75dddf6 2023-01-15)
binary: rustc
commit-hash: 9e75dddf609c0201d03f9792e850f95d6a283d11
commit-date: 2023-01-15
host: x86_64-unknown-linux-gnu
release: 1.68.0-nightly
LLVM version: 15.0.6

Current error output

`rustc ./tests/ui/inline-const/const-expr-generic-err2.rs  "-Zcrate-attr=feature(generic_const_exprs)"`

Backtrace

warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
 --> <crate attribute>:1:9
  |
1 | feature(generic_const_exprs)
  |         ^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
  = note: `#[warn(incomplete_features)]` on by default

error: internal compiler error: no errors encountered even though `delay_span_bug` issued

error: internal compiler error: Missing value for constant, but no error reported?
 --> ./tests/ui/inline-const/const-expr-generic-err2.rs:4:19
  |
4 |     let _ = [0u8; const { std::mem::size_of::<T>() }];
  |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
             1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
             2: rustc_trait_selection::traits::const_evaluatable::is_const_evaluatable
             3: <rustc_trait_selection::traits::fulfill::FulfillProcessor as rustc_data_structures::obligation_forest::ObligationProcessor>::process_obligation
             4: <rustc_data_structures::obligation_forest::ObligationForest<rustc_trait_selection::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection::traits::fulfill::FulfillProcessor>
             5: <rustc_trait_selection::traits::fulfill::FulfillmentContext as rustc_infer::traits::engine::TraitEngine>::select_where_possible
             6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::demand_coerce
             7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
             8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
            10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
            11: rustc_hir_typeck::check::check_fn
            12: <rustc_hir_typeck::inherited::InheritedBuilder>::enter::<rustc_hir_typeck::typeck_with_fallback<rustc_hir_typeck::typeck::{closure#0}>::{closure#0}::{closure#1}, &rustc_middle::ty::typeck_results::TypeckResults>
            13: rustc_hir_typeck::typeck
            14: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
            15: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
            16: rustc_hir_typeck::typeck_item_bodies
            17: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
            18: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
            19: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
            20: rustc_hir_analysis::check_crate
            21: rustc_interface::passes::analysis
            22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
            23: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            24: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#2}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            25: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
            26: 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#0}>
            27: <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>>
            28: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            29: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            30: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            31: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            32: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/std/src/sys/unix/thread.rs:108:17
            33: <unknown>
            34: <unknown>


error: internal compiler error: `report_selection_error` did not emit an error
 --> ./tests/ui/inline-const/const-expr-generic-err2.rs:4:19
  |
4 |     let _ = [0u8; const { std::mem::size_of::<T>() }];
  |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
             1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
             2: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_selection_error
             3: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
             4: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
             5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::demand_coerce
             6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
             7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
            10: rustc_hir_typeck::check::check_fn
            11: <rustc_hir_typeck::inherited::InheritedBuilder>::enter::<rustc_hir_typeck::typeck_with_fallback<rustc_hir_typeck::typeck::{closure#0}>::{closure#0}::{closure#1}, &rustc_middle::ty::typeck_results::TypeckResults>
            12: rustc_hir_typeck::typeck
            13: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
            14: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
            15: rustc_hir_typeck::typeck_item_bodies
            16: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
            17: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
            18: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
            19: rustc_hir_analysis::check_crate
            20: rustc_interface::passes::analysis
            21: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
            22: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            23: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#2}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            24: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
            25: 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#0}>
            26: <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>>
            27: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            28: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            29: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            30: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            31: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/std/src/sys/unix/thread.rs:108:17
            32: <unknown>
            33: <unknown>


error: internal compiler error: `ErrorGuaranteed` without an error
 --> ./tests/ui/inline-const/const-expr-generic-err2.rs:4:19
  |
4 |     let _ = [0u8; const { std::mem::size_of::<T>() }];
  |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
             1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
             2: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_selection_error
             3: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
             4: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
             5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::demand_coerce
             6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
             7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
            10: rustc_hir_typeck::check::check_fn
            11: <rustc_hir_typeck::inherited::InheritedBuilder>::enter::<rustc_hir_typeck::typeck_with_fallback<rustc_hir_typeck::typeck::{closure#0}>::{closure#0}::{closure#1}, &rustc_middle::ty::typeck_results::TypeckResults>
            12: rustc_hir_typeck::typeck
            13: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
            14: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
            15: rustc_hir_typeck::typeck_item_bodies
            16: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
            17: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
            18: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
            19: rustc_hir_analysis::check_crate
            20: rustc_interface::passes::analysis
            21: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
            22: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            23: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#2}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            24: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
            25: 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#0}>
            26: <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>>
            27: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            28: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            29: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            30: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            31: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/std/src/sys/unix/thread.rs:108:17
            32: <unknown>
            33: <unknown>


error: internal compiler error: expected fullfillment errors
  |
  = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
             1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
             2: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
             3: <rustc_hir_typeck::fn_ctxt::FnCtxt>::demand_coerce
             4: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
             5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
             8: rustc_hir_typeck::check::check_fn
             9: <rustc_hir_typeck::inherited::InheritedBuilder>::enter::<rustc_hir_typeck::typeck_with_fallback<rustc_hir_typeck::typeck::{closure#0}>::{closure#0}::{closure#1}, &rustc_middle::ty::typeck_results::TypeckResults>
            10: rustc_hir_typeck::typeck
            11: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
            12: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
            13: rustc_hir_typeck::typeck_item_bodies
            14: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
            15: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
            16: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
            17: rustc_hir_analysis::check_crate
            18: rustc_interface::passes::analysis
            19: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
            20: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            21: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#2}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            22: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
            23: 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#0}>
            24: <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>>
            25: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            26: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            27: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            28: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            29: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/std/src/sys/unix/thread.rs:108:17
            30: <unknown>
            31: <unknown>


error: internal compiler error: TyKind::Error constructed but no error reported
  |
  = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
             1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
             2: <rustc_middle::ty::context::TyCtxt>::ty_error
             3: rustc_mir_build::build::mir_built
             4: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::mir_built, rustc_query_impl::plumbing::QueryCtxt>
             5: rustc_mir_transform::check_unsafety::unsafety_check_result
             6: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::unsafety_check_result, rustc_query_impl::plumbing::QueryCtxt>
             7: rustc_mir_transform::mir_const
             8: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::mir_const, rustc_query_impl::plumbing::QueryCtxt>
             9: rustc_mir_transform::mir_promoted
            10: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::mir_promoted, rustc_query_impl::plumbing::QueryCtxt>
            11: rustc_borrowck::mir_borrowck
            12: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::mir_borrowck, rustc_query_impl::plumbing::QueryCtxt>
            13: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_interface::passes::analysis::{closure#2}::{closure#0}>::{closure#0}>
            14: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{closure#2}>
            15: rustc_interface::passes::analysis
            16: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
            17: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            18: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#2}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            19: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
            20: 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#0}>
            21: <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>>
            22: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            23: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            24: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            25: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            26: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/std/src/sys/unix/thread.rs:108:17
            27: <unknown>
            28: <unknown>


error: internal compiler error: broken MIR in DefId(0:3 ~ const_expr_generic_err2[212f]::foo) ("return type"): bad type [type error]
 --> ./tests/ui/inline-const/const-expr-generic-err2.rs:3:1
  |
3 | fn foo<T>() {
  | ^^^^^^^^^^^
  |
  = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
             1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
             2: <rustc_borrowck::type_check::TypeVerifier as rustc_middle::mir::visit::Visitor>::visit_body
             3: rustc_borrowck::type_check::type_check
             4: rustc_borrowck::nll::compute_regions
             5: rustc_borrowck::do_mir_borrowck
             6: rustc_borrowck::mir_borrowck
             7: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::mir_borrowck, rustc_query_impl::plumbing::QueryCtxt>
             8: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_interface::passes::analysis::{closure#2}::{closure#0}>::{closure#0}>
             9: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{closure#2}>
            10: rustc_interface::passes::analysis
            11: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
            12: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            13: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#2}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            14: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
            15: 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#0}>
            16: <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>>
            17: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            18: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            19: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            20: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            21: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/std/src/sys/unix/thread.rs:108:17
            22: <unknown>
            23: <unknown>


error: internal compiler error: TyKind::Error constructed but no error reported
  |
  = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
             1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
             2: <rustc_middle::ty::context::TyCtxt>::ty_error
             3: <rustc_borrowck::type_check::TypeVerifier as rustc_middle::mir::visit::Visitor>::visit_body
             4: rustc_borrowck::type_check::type_check
             5: rustc_borrowck::nll::compute_regions
             6: rustc_borrowck::do_mir_borrowck
             7: rustc_borrowck::mir_borrowck
             8: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::mir_borrowck, rustc_query_impl::plumbing::QueryCtxt>
             9: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_interface::passes::analysis::{closure#2}::{closure#0}>::{closure#0}>
            10: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{closure#2}>
            11: rustc_interface::passes::analysis
            12: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
            13: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            14: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#2}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            15: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
            16: 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#0}>
            17: <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>>
            18: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            19: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            20: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            21: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            22: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/std/src/sys/unix/thread.rs:108:17
            23: <unknown>
            24: <unknown>


error: internal compiler error: broken MIR in DefId(0:3 ~ const_expr_generic_err2[212f]::foo) (LocalDecl { mutability: Mut, local_info: None, internal: false, is_block_tail: None, ty: [type error], user_ty: None, source_info: SourceInfo { span: ./tests/ui/inline-const/const-expr-generic-err2.rs:3:1: 3:12 (#0), scope: scope[0] } }): bad type [type error]
 --> ./tests/ui/inline-const/const-expr-generic-err2.rs:3:1
  |
3 | fn foo<T>() {
  | ^^^^^^^^^^^
  |
  = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
             1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
             2: <rustc_borrowck::type_check::TypeVerifier as rustc_middle::mir::visit::Visitor>::visit_body
             3: rustc_borrowck::type_check::type_check
             4: rustc_borrowck::nll::compute_regions
             5: rustc_borrowck::do_mir_borrowck
             6: rustc_borrowck::mir_borrowck
             7: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::mir_borrowck, rustc_query_impl::plumbing::QueryCtxt>
             8: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_interface::passes::analysis::{closure#2}::{closure#0}>::{closure#0}>
             9: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{closure#2}>
            10: rustc_interface::passes::analysis
            11: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
            12: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            13: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#2}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            14: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
            15: 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#0}>
            16: <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>>
            17: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
            18: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<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>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            19: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            20: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/alloc/src/boxed.rs:1988:9
            21: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/9e75dddf609c0201d03f9792e850f95d6a283d11/library/std/src/sys/unix/thread.rs:108:17
            22: <unknown>
            23: <unknown>


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

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.68.0-nightly (9e75dddf6 2023-01-15) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z crate-attr=feature(generic_const_exprs)

query stack during panic:
end of query stack
error: aborting due to 9 previous errors; 1 warning emitted

Anything else?

No response

[compiler-errors]

@matthiaskrgr since you file a lot of feature flag combination ICEs, could you please move any -Zcrate-attr=feature(..) into the MCVE as #![feature(..)]? Way too many times people overlook that part of the ICE and try to repro/submit fixes that don't actually fix the issue.

[matthiaskrgr]

😅 I'll try to remember, I'll have to do this manually...
For performance reasons I check a chunk of 15-10 different feature flags at a time with icemaker and when an ICE is found, I check ("binary search" would be an overstatement) if there is a minimum amount of flags that reproduces the ice and return the path and the combination of relevant compiler flags. Sometimes that's also stuff like -Cdebuginfo or an edition flag :/