ICE: ConstArgHasType(^0, usize) has escaping bound vars, so it cannot be wrapped in a dummy binder.

[matthiaskrgr]

original:

#![feature(non_lifetime_binders)]

fn walk2<'a, T: 'a>(_: T)
where
    for<const C: usize> [(); C]: 'a, 
{}

fn main() {}

Version information

rustc 1.81.0-nightly (11e57241f 2024-07-19)
binary: rustc
commit-hash: 11e57241f166194a328438d9264b68c98a18d51f
commit-date: 2024-07-19
host: x86_64-unknown-linux-gnu
release: 1.81.0-nightly
LLVM version: 18.1.7

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc

Program output

warning: the feature `non_lifetime_binders` is incomplete and may not be safe to use and/or cause compiler crashes
 --> 120860.rs:1:12
  |
1 | #![feature(non_lifetime_binders)]
  |            ^^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #108185 <https://github.com/rust-lang/rust/issues/108185> for more information
  = note: `#[warn(incomplete_features)]` on by default

thread 'rustc' panicked at compiler/rustc_trait_selection/src/traits/wf.rs:685:21:
`ConstArgHasType(^0, usize)` has escaping bound vars, so it cannot be wrapped in a dummy binder.
stack backtrace:
   0:     0x79ae54e81125 - std::backtrace_rs::backtrace::libunwind::trace::hf98a5915ebb35e48
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
   1:     0x79ae54e81125 - std::backtrace_rs::backtrace::trace_unsynchronized::hd655af97e2fd6730
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x79ae54e81125 - std::sys::backtrace::_print_fmt::h621db2f84bb6c977
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/sys/backtrace.rs:65:5
   3:     0x79ae54e81125 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h15411039d8520454
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/sys/backtrace.rs:40:26
   4:     0x79ae54ed0c2b - core::fmt::rt::Argument::fmt::h67bd01cd3519872c
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/core/src/fmt/rt.rs:173:76
   5:     0x79ae54ed0c2b - core::fmt::write::hadd1ce33df102529
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/core/src/fmt/mod.rs:1182:21
   6:     0x79ae54e75bff - std::io::Write::write_fmt::h2f869538ed52830c
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/io/mod.rs:1827:15
   7:     0x79ae54e83911 - std::sys::backtrace::BacktraceLock::print::hbc3230efeae1e486
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/sys/backtrace.rs:43:9
   8:     0x79ae54e83911 - std::panicking::default_hook::{{closure}}::h218c8d9fd7d09778
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/panicking.rs:269:22
   9:     0x79ae54e835ec - std::panicking::default_hook::hb07cda98c1c69610
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/panicking.rs:296:9
  10:     0x79ae5122d86a - std[6b173760e3c5fb6]::panicking::update_hook::<alloc[90d8a7b433d20df0]::boxed::Box<rustc_driver_impl[25cb91e50f1896ac]::install_ice_hook::{closure#0}>>::{closure#0}
  11:     0x79ae54e842df - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h47aca6625104f576
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/alloc/src/boxed.rs:2084:9
  12:     0x79ae54e842df - std::panicking::rust_panic_with_hook::h4eb1d6a88426bb57
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/panicking.rs:808:13
  13:     0x79ae54e83f07 - std::panicking::begin_panic_handler::{{closure}}::h061f8898eb3a2216
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/panicking.rs:674:13
  14:     0x79ae54e815e9 - std::sys::backtrace::__rust_end_short_backtrace::h61e77cb542bf7706
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/sys/backtrace.rs:168:18
  15:     0x79ae54e83b94 - rust_begin_unwind
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/panicking.rs:665:5
  16:     0x79ae54ecd1e3 - core::panicking::panic_fmt::hcb681182948762cb
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/core/src/panicking.rs:74:14
  17:     0x79ae53e5998c - <rustc_type_ir[f96864cd1999cfdb]::binder::Binder<rustc_middle[d4947050f46ff72a]::ty::context::TyCtxt, rustc_type_ir[f96864cd1999cfdb]::predicate_kind::PredicateKind<rustc_middle[d4947050f46ff72a]::ty::context::TyCtxt>>>::dummy.cold
  18:     0x79ae4f008d5b - <rustc_trait_selection[1026606f0fca5836]::traits::wf::WfPredicates as rustc_type_ir[f96864cd1999cfdb]::visit::TypeVisitor<rustc_middle[d4947050f46ff72a]::ty::context::TyCtxt>>::visit_ty
  19:     0x79ae52d96549 - rustc_trait_selection[1026606f0fca5836]::traits::wf::clause_obligations
  20:     0x79ae52d9309b - rustc_hir_analysis[67f94dc96106c366]::check::wfcheck::check_where_clauses
  21:     0x79ae52d9f4b4 - rustc_hir_analysis[67f94dc96106c366]::check::wfcheck::check_fn_or_method
  22:     0x79ae52da192b - rustc_hir_analysis[67f94dc96106c366]::check::wfcheck::check_item_fn
  23:     0x79ae4fdac34f - rustc_hir_analysis[67f94dc96106c366]::check::wfcheck::check_well_formed
  24:     0x79ae52f7f1c7 - rustc_query_impl[dfa85d359d8bf55f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[dfa85d359d8bf55f]::query_impl::check_well_formed::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d4947050f46ff72a]::query::erase::Erased<[u8; 1usize]>>
  25:     0x79ae52f7f43f - rustc_query_system[5fd7963a6e62591]::query::plumbing::try_execute_query::<rustc_query_impl[dfa85d359d8bf55f]::DynamicConfig<rustc_query_system[5fd7963a6e62591]::query::caches::VecCache<rustc_hir[6b88011788635e50]::hir_id::OwnerId, rustc_middle[d4947050f46ff72a]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[dfa85d359d8bf55f]::plumbing::QueryCtxt, false>
  26:     0x79ae52f7f1a0 - rustc_query_impl[dfa85d359d8bf55f]::query_impl::check_well_formed::get_query_non_incr::__rust_end_short_backtrace
  27:     0x79ae52f7fe6d - rustc_hir_analysis[67f94dc96106c366]::check::wfcheck::check_mod_type_wf
  28:     0x79ae52f7fca3 - rustc_query_impl[dfa85d359d8bf55f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[dfa85d359d8bf55f]::query_impl::check_mod_type_wf::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d4947050f46ff72a]::query::erase::Erased<[u8; 1usize]>>
  29:     0x79ae535b8af8 - rustc_query_system[5fd7963a6e62591]::query::plumbing::try_execute_query::<rustc_query_impl[dfa85d359d8bf55f]::DynamicConfig<rustc_query_system[5fd7963a6e62591]::query::caches::DefaultCache<rustc_span[bca8f273264d3c53]::def_id::LocalModDefId, rustc_middle[d4947050f46ff72a]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[dfa85d359d8bf55f]::plumbing::QueryCtxt, false>
  30:     0x79ae535b88a9 - rustc_query_impl[dfa85d359d8bf55f]::query_impl::check_mod_type_wf::get_query_non_incr::__rust_end_short_backtrace
  31:     0x79ae52bd5313 - rustc_hir_analysis[67f94dc96106c366]::check_crate
  32:     0x79ae52bcbd95 - rustc_interface[e83b188aca6a6213]::passes::analysis
  33:     0x79ae52bcb947 - rustc_query_impl[dfa85d359d8bf55f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[dfa85d359d8bf55f]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d4947050f46ff72a]::query::erase::Erased<[u8; 1usize]>>
  34:     0x79ae536c3965 - rustc_query_system[5fd7963a6e62591]::query::plumbing::try_execute_query::<rustc_query_impl[dfa85d359d8bf55f]::DynamicConfig<rustc_query_system[5fd7963a6e62591]::query::caches::SingleCache<rustc_middle[d4947050f46ff72a]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[dfa85d359d8bf55f]::plumbing::QueryCtxt, false>
  35:     0x79ae536c36cf - rustc_query_impl[dfa85d359d8bf55f]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  36:     0x79ae535e8a05 - rustc_interface[e83b188aca6a6213]::interface::run_compiler::<core[9625cf1cb95ebe7c]::result::Result<(), rustc_span[bca8f273264d3c53]::ErrorGuaranteed>, rustc_driver_impl[25cb91e50f1896ac]::run_compiler::{closure#0}>::{closure#1}
  37:     0x79ae535a1749 - std[6b173760e3c5fb6]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[e83b188aca6a6213]::util::run_in_thread_with_globals<rustc_interface[e83b188aca6a6213]::util::run_in_thread_pool_with_globals<rustc_interface[e83b188aca6a6213]::interface::run_compiler<core[9625cf1cb95ebe7c]::result::Result<(), rustc_span[bca8f273264d3c53]::ErrorGuaranteed>, rustc_driver_impl[25cb91e50f1896ac]::run_compiler::{closure#0}>::{closure#1}, core[9625cf1cb95ebe7c]::result::Result<(), rustc_span[bca8f273264d3c53]::ErrorGuaranteed>>::{closure#0}, core[9625cf1cb95ebe7c]::result::Result<(), rustc_span[bca8f273264d3c53]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[9625cf1cb95ebe7c]::result::Result<(), rustc_span[bca8f273264d3c53]::ErrorGuaranteed>>
  38:     0x79ae535a14fa - <<std[6b173760e3c5fb6]::thread::Builder>::spawn_unchecked_<rustc_interface[e83b188aca6a6213]::util::run_in_thread_with_globals<rustc_interface[e83b188aca6a6213]::util::run_in_thread_pool_with_globals<rustc_interface[e83b188aca6a6213]::interface::run_compiler<core[9625cf1cb95ebe7c]::result::Result<(), rustc_span[bca8f273264d3c53]::ErrorGuaranteed>, rustc_driver_impl[25cb91e50f1896ac]::run_compiler::{closure#0}>::{closure#1}, core[9625cf1cb95ebe7c]::result::Result<(), rustc_span[bca8f273264d3c53]::ErrorGuaranteed>>::{closure#0}, core[9625cf1cb95ebe7c]::result::Result<(), rustc_span[bca8f273264d3c53]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[9625cf1cb95ebe7c]::result::Result<(), rustc_span[bca8f273264d3c53]::ErrorGuaranteed>>::{closure#2} as core[9625cf1cb95ebe7c]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  39:     0x79ae54e8e33b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd3e0782f209a59bb
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/alloc/src/boxed.rs:2070:9
  40:     0x79ae54e8e33b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h2ffe75b9a73fa277
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/alloc/src/boxed.rs:2070:9
  41:     0x79ae54e8e33b - std::sys::pal::unix::thread::Thread::new::thread_start::he38da8e39f41a015
                               at /rustc/11e57241f166194a328438d9264b68c98a18d51f/library/std/src/sys/pal/unix/thread.rs:108:17
  42:     0x79ae54c22ded - <unknown>
  43:     0x79ae54ca60dc - <unknown>
  44:                0x0 - <unknown>

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 `/home/matthias/vcs/github/glacier2/ices/rustc-ice-2024-07-19T15_54_49-2164713.txt` to your bug report

query stack during panic:
#0 [check_well_formed] checking that `walk2` is well-formed
#1 [check_mod_type_wf] checking that types are well-formed in top-level module
end of query stack
warning: 1 warning emitted

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: ty::ConstKind::Error constructed but no error reported
  |
  = note: delayed at compiler/rustc_trait_selection/src/traits/mod.rs:360:32 - disabled backtrace

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 `/home/matthias/vcs/github/glacier2/ices/rustc-ice-2024-07-19T15_54_49-2164713.txt` to your bug report

query stack during panic:
end of query stack
thread 'rustc' panicked at library/core/src/panicking.rs:229:5:
panic in a destructor during cleanup

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 `/home/matthias/vcs/github/glacier2/ices/rustc-ice-2024-07-19T15_54_49-2164713.txt` to your bug report

query stack during panic:
end of query stack
thread caused non-unwinding panic. aborting.
[1]    2164713 IOT instruction  ~/.rustup/toolchains/master/bin/rustc 120860.rs

@rustbot label +F-non_lifetime_binders

[fmease]

strongly relates to #127009

[GrigorenkoPV]

Regression in #125915