[ICE]: fluent string: argument `lifetime_1` exists but was not referenced correctly

[matthiaskrgr]

Code

fn foo() -> impl Into<for<'a> fn(&'a ())> {
    (|_| {}) as for<'a> fn(_ )
}

Affected release channels

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

Rust Version

rustc 1.68.0-nightly (333ee6c46 2023-01-18)
binary: rustc
commit-hash: 333ee6c466972185973d5097f8b5fb0f9fb13fa5
commit-date: 2023-01-18
host: x86_64-unknown-linux-gnu
release: 1.68.0-nightly
LLVM version: 15.0.6

Current error output

No response

Backtrace

error[E0601]: `main` function not found in crate `ce07d43d0824ef1627fc3d0581e45b94bca99127`
 --> ce07d43d0824ef1627fc3d0581e45b94bca99127.rs:3:2
  |
3 | }
  |  ^ consider adding a `main` function to `ce07d43d0824ef1627fc3d0581e45b94bca99127.rs`

thread 'rustc' panicked at 'called `Result::unwrap()` on an `Err` value: failed while formatting fluent string `infer_actual_impl_expl_expected_other_some`:
argument `lifetime_1` exists but was not referenced correctly
help: try using `{$lifetime_1}` instead
', /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/compiler/rustc_errors/src/lib.rs:632:18
stack backtrace:
   0:     0x7ff0b4a6a3ca - std::backtrace_rs::backtrace::libunwind::trace::h50542de70121e929
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7ff0b4a6a3ca - std::backtrace_rs::backtrace::trace_unsynchronized::hae0fad0188b638fb
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7ff0b4a6a3ca - std::sys_common::backtrace::_print_fmt::h0db5adad57c4bf89
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7ff0b4a6a3ca - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h00bcafe34ad7431d
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7ff0b4acd67e - core::fmt::write::hac51cd027be97ada
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/core/src/fmt/mod.rs:1213:17
   5:     0x7ff0b4a5aa15 - std::io::Write::write_fmt::h3d0d4a9f33ed60b4
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/io/mod.rs:1682:15
   6:     0x7ff0b4a6a195 - std::sys_common::backtrace::_print::h91a5e2dc0c5534c6
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7ff0b4a6a195 - std::sys_common::backtrace::print::hf5bbf2aee1aca335
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7ff0b4a6cf5f - std::panicking::default_hook::{{closure}}::hb617088b31f5607b
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/panicking.rs:267:22
   9:     0x7ff0b4a6cc9b - std::panicking::default_hook::h8aabc36d33777a9f
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/panicking.rs:286:9
  10:     0x7ff0b38482e4 - <rustc_driver[3007fa38fe7f0954]::DEFAULT_HOOK::{closure#0}::{closure#0} as core[830d3b100652ecaa]::ops::function::FnOnce<(&core[830d3b100652ecaa]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  11:     0x7ff0b4a6d79a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h73dc741209159f0b
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/alloc/src/boxed.rs:2002:9
  12:     0x7ff0b4a6d79a - std::panicking::rust_panic_with_hook::ha64a2ebee15afbaf
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/panicking.rs:692:13
  13:     0x7ff0b4a6d519 - std::panicking::begin_panic_handler::{{closure}}::h0e260611a29c4e4b
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/panicking.rs:579:13
  14:     0x7ff0b4a6a87c - std::sys_common::backtrace::__rust_end_short_backtrace::he6832640d64ae3e0
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/sys_common/backtrace.rs:137:18
  15:     0x7ff0b4a6d222 - rust_begin_unwind
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/panicking.rs:575:5
  16:     0x7ff0b4aca023 - core::panicking::panic_fmt::hab8eca7df403fce4
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/core/src/panicking.rs:64:14
  17:     0x7ff0b4aca5b3 - core::result::unwrap_failed::h3fb434f504c80690
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/core/src/result.rs:1790:5
  18:     0x7ff0b3bb9b3f - <rustc_errors[24ae80d350ed6ef3]::Handler>::eagerly_translate::<std[d57f0b25e837618f]::collections::hash::map::Iter<alloc[597172b2b0be2ffa]::borrow::Cow<str>, rustc_errors[24ae80d350ed6ef3]::diagnostic::DiagnosticArgValue>>
  19:     0x7ff0b3b8feaf - <rustc_infer[1a24f95b14ffce22]::errors::ActualImplExplNotes as rustc_errors[24ae80d350ed6ef3]::diagnostic::AddToDiagnostic>::add_to_diagnostic_with::<<rustc_errors[24ae80d350ed6ef3]::diagnostic::Diagnostic>::eager_subdiagnostic<rustc_infer[1a24f95b14ffce22]::errors::ActualImplExplNotes>::{closure#0}>
  20:     0x7ff0b3b904ca - <rustc_infer[1a24f95b14ffce22]::errors::TraitPlaceholderMismatch as rustc_errors[24ae80d350ed6ef3]::diagnostic_builder::IntoDiagnostic>::into_diagnostic
  21:     0x7ff0b3b284b8 - <rustc_infer[1a24f95b14ffce22]::infer::error_reporting::nice_region_error::NiceRegionError>::try_report_trait_placeholder_mismatch
  22:     0x7ff0b3b29c87 - <rustc_infer[1a24f95b14ffce22]::infer::error_reporting::nice_region_error::NiceRegionError>::try_report_from_nll
  23:     0x7ff0b366039e - rustc_borrowck[23af509549ebd80c]::diagnostics::bound_region_errors::try_extract_error_from_region_constraints::<<rustc_borrowck[23af509549ebd80c]::type_check::InstantiateOpaqueType as rustc_borrowck[23af509549ebd80c]::diagnostics::bound_region_errors::TypeOpInfo>::nice_error::{closure#0}, <rustc_borrowck[23af509549ebd80c]::type_check::InstantiateOpaqueType as rustc_borrowck[23af509549ebd80c]::diagnostics::bound_region_errors::TypeOpInfo>::nice_error::{closure#1}>
  24:     0x7ff0b3557634 - <rustc_borrowck[23af509549ebd80c]::type_check::InstantiateOpaqueType as rustc_borrowck[23af509549ebd80c]::diagnostics::bound_region_errors::TypeOpInfo>::nice_error
  25:     0x7ff0b355ebd9 - <rustc_borrowck[23af509549ebd80c]::type_check::InstantiateOpaqueType as rustc_borrowck[23af509549ebd80c]::diagnostics::bound_region_errors::TypeOpInfo>::report_error
  26:     0x7ff0b3658ea4 - <rustc_borrowck[23af509549ebd80c]::diagnostics::bound_region_errors::UniverseInfo>::report_error
  27:     0x7ff0b264ec57 - rustc_borrowck[23af509549ebd80c]::do_mir_borrowck
  28:     0x7ff0b262df05 - rustc_borrowck[23af509549ebd80c]::mir_borrowck
  29:     0x7ff0b21ee19d - rustc_query_system[1c311a51d396ff65]::query::plumbing::try_execute_query::<rustc_query_impl[d3da972c3560dd09]::queries::mir_borrowck, rustc_query_impl[d3da972c3560dd09]::plumbing::QueryCtxt>
  30:     0x7ff0b323b82d - <rustc_query_impl[d3da972c3560dd09]::Queries as rustc_middle[6fc96dfead90d7a7]::ty::query::QueryEngine>::mir_borrowck
  31:     0x7ff0b306ba5d - rustc_hir_analysis[4242f85aba23ed]::collect::type_of::type_of
  32:     0x7ff0b2188728 - rustc_query_system[1c311a51d396ff65]::query::plumbing::get_query::<rustc_query_impl[d3da972c3560dd09]::queries::type_of, rustc_query_impl[d3da972c3560dd09]::plumbing::QueryCtxt, rustc_middle[6fc96dfead90d7a7]::dep_graph::dep_node::DepKind>
  33:     0x7ff0b242334e - rustc_hir_analysis[4242f85aba23ed]::check::check::check_mod_item_types
  34:     0x7ff0b2e02251 - rustc_query_system[1c311a51d396ff65]::query::plumbing::try_execute_query::<rustc_query_impl[d3da972c3560dd09]::queries::check_mod_item_types, rustc_query_impl[d3da972c3560dd09]::plumbing::QueryCtxt>
  35:     0x7ff0b323ad8d - <rustc_query_impl[d3da972c3560dd09]::Queries as rustc_middle[6fc96dfead90d7a7]::ty::query::QueryEngine>::check_mod_item_types
  36:     0x7ff0b1e7b2e5 - <rustc_middle[6fc96dfead90d7a7]::hir::map::Map>::for_each_module::<rustc_hir_analysis[4242f85aba23ed]::check_crate::{closure#6}::{closure#0}>
  37:     0x7ff0b1e7add2 - rustc_hir_analysis[4242f85aba23ed]::check_crate
  38:     0x7ff0b1e7aa1b - rustc_interface[a3bd2224478d897e]::passes::analysis
  39:     0x7ff0b2fb57ee - rustc_query_system[1c311a51d396ff65]::query::plumbing::try_execute_query::<rustc_query_impl[d3da972c3560dd09]::queries::analysis, rustc_query_impl[d3da972c3560dd09]::plumbing::QueryCtxt>
  40:     0x7ff0b3237c1a - <rustc_query_impl[d3da972c3560dd09]::Queries as rustc_middle[6fc96dfead90d7a7]::ty::query::QueryEngine>::analysis
  41:     0x7ff0b2ad6a53 - <rustc_interface[a3bd2224478d897e]::passes::QueryContext>::enter::<rustc_driver[3007fa38fe7f0954]::run_compiler::{closure#1}::{closure#2}::{closure#2}, core[830d3b100652ecaa]::result::Result<(), rustc_errors[24ae80d350ed6ef3]::ErrorGuaranteed>>
  42:     0x7ff0b2ad54a8 - <rustc_interface[a3bd2224478d897e]::interface::Compiler>::enter::<rustc_driver[3007fa38fe7f0954]::run_compiler::{closure#1}::{closure#2}, core[830d3b100652ecaa]::result::Result<core[830d3b100652ecaa]::option::Option<rustc_interface[a3bd2224478d897e]::queries::Linker>, rustc_errors[24ae80d350ed6ef3]::ErrorGuaranteed>>
  43:     0x7ff0b2ad3328 - rustc_span[8b627345fe9560b3]::with_source_map::<core[830d3b100652ecaa]::result::Result<(), rustc_errors[24ae80d350ed6ef3]::ErrorGuaranteed>, rustc_interface[a3bd2224478d897e]::interface::run_compiler<core[830d3b100652ecaa]::result::Result<(), rustc_errors[24ae80d350ed6ef3]::ErrorGuaranteed>, rustc_driver[3007fa38fe7f0954]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  44:     0x7ff0b2ad2e01 - <scoped_tls[919fbd9b743d1ab7]::ScopedKey<rustc_span[8b627345fe9560b3]::SessionGlobals>>::set::<rustc_interface[a3bd2224478d897e]::interface::run_compiler<core[830d3b100652ecaa]::result::Result<(), rustc_errors[24ae80d350ed6ef3]::ErrorGuaranteed>, rustc_driver[3007fa38fe7f0954]::run_compiler::{closure#1}>::{closure#0}, core[830d3b100652ecaa]::result::Result<(), rustc_errors[24ae80d350ed6ef3]::ErrorGuaranteed>>
  45:     0x7ff0b2ad23e2 - std[d57f0b25e837618f]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[a3bd2224478d897e]::util::run_in_thread_pool_with_globals<rustc_interface[a3bd2224478d897e]::interface::run_compiler<core[830d3b100652ecaa]::result::Result<(), rustc_errors[24ae80d350ed6ef3]::ErrorGuaranteed>, rustc_driver[3007fa38fe7f0954]::run_compiler::{closure#1}>::{closure#0}, core[830d3b100652ecaa]::result::Result<(), rustc_errors[24ae80d350ed6ef3]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[830d3b100652ecaa]::result::Result<(), rustc_errors[24ae80d350ed6ef3]::ErrorGuaranteed>>
  46:     0x7ff0b2ad218c - <<std[d57f0b25e837618f]::thread::Builder>::spawn_unchecked_<rustc_interface[a3bd2224478d897e]::util::run_in_thread_pool_with_globals<rustc_interface[a3bd2224478d897e]::interface::run_compiler<core[830d3b100652ecaa]::result::Result<(), rustc_errors[24ae80d350ed6ef3]::ErrorGuaranteed>, rustc_driver[3007fa38fe7f0954]::run_compiler::{closure#1}>::{closure#0}, core[830d3b100652ecaa]::result::Result<(), rustc_errors[24ae80d350ed6ef3]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[830d3b100652ecaa]::result::Result<(), rustc_errors[24ae80d350ed6ef3]::ErrorGuaranteed>>::{closure#1} as core[830d3b100652ecaa]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  47:     0x7ff0b4a77bd3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7ba1652ef014411c
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/alloc/src/boxed.rs:1988:9
  48:     0x7ff0b4a77bd3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hb86249b0355c08e6
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/alloc/src/boxed.rs:1988:9
  49:     0x7ff0b4a77bd3 - std::sys::unix::thread::Thread::new::thread_start::h7258c93114561772
                               at /rustc/333ee6c466972185973d5097f8b5fb0f9fb13fa5/library/std/src/sys/unix/thread.rs:108:17
  50:     0x7ff0b046a8fd - <unknown>
  51:     0x7ff0b04eca60 - <unknown>
  52:                0x0 - <unknown>

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 1.68.0-nightly (333ee6c46 2023-01-18) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [mir_borrowck] borrow-checking `foo`
#1 [type_of] computing type of `foo::{opaque#0}`
#2 [check_mod_item_types] checking item types in top-level module
#3 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error

For more information about this error, try `rustc --explain E0601`.

Anything else?

No response