unable to construct a constant value for the unevaluated constant UnevaluatedConst { def: DefId(0:73 ~ test_3[ea46]::v20::{impl#3}::{constant#1}), args: [?0c: usize] }

[Doremisolatido]

Code

#![feature(generic_const_exprs)]

mod v20 {
const v4: usize = 512;
pub type v11 = [[usize; v4]; v4];
const v2: v11 = [[256; v4]; v4];

const v0: [[usize; v4]; v4] = v6(v8);
pub struct v17<const v10: usize, const v7: v11> {
_p: (),
}

impl v17<512, v0> {
pub const fn v21() -> v18 {
}
}

impl<const v10: usize> v17<v10, v2> {
pub const fn v21() -> v18 {
v18 { _p: () }
}
}
}
pub use v20::{v13, v17};
fn main() {
}

Meta

rustc --version --verbose:

rustc 1.77.0-nightly (d8b44d280 2024-01-07)
binary: rustc
commit-hash: d8b44d2802ab665b183dce06d527bf09175dd8cf
commit-date: 2024-01-07
host: x86_64-unknown-linux-gnu
release: 1.77.0-nightly
LLVM version: 17.0.6

Error output

error: internal compiler error: compiler/rustc_infer/src/infer/mod.rs:1583:17: unable to construct a constant value for the unevaluated constant UnevaluatedConst { def: DefId(0:73 ~ test_3[ea46]::v20::{impl#3}::{constant#1}), args: [?0c: usize] }

Backtrace

stack backtrace:
   0:     0x7fd8ea92d477 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h9b88b6f3ca46a608
   1:     0x7fd8ea98b470 - core::fmt::write::h006931418f3178a6
   2:     0x7fd8ea919f1f - std::io::Write::write_fmt::hef1b13539c871113
   3:     0x7fd8ea92d244 - std::sys_common::backtrace::print::hdf04dd1e52b85090
   4:     0x7fd8ea92e14a - std::panicking::default_hook::{{closure}}::h38e3ca5d3417a132
   5:     0x7fd8ea92de73 - std::panicking::default_hook::h7c8bd090cc5c8cb1
   6:     0x7fd8eb4a0c37 - <alloc[ab03fe8b414083ab]::boxed::Box<rustc_driver_impl[2320baa211b147c5]::install_ice_hook::{closure#0}> as core[da5ff848ab5b9634]::ops::function::Fn<(&dyn for<'a, 'b> core[da5ff848ab5b9634]::ops::function::Fn<(&'a core[da5ff848ab5b9634]::panic::panic_info::PanicInfo<'b>,), Output = ()> + core[da5ff848ab5b9634]::marker::Sync + core[da5ff848ab5b9634]::marker::Send, &core[da5ff848ab5b9634]::panic::panic_info::PanicInfo)>>::call
   7:     0x7fd8ea92e898 - std::panicking::rust_panic_with_hook::h39552955130d1e24
   8:     0x7fd8f06e8786 - std[9295f5ecf1531c2a]::panicking::begin_panic::<rustc_errors[aa2fa569483a35a2]::ExplicitBug>::{closure#0}
   9:     0x7fd8f06e3576 - std[9295f5ecf1531c2a]::sys_common::backtrace::__rust_end_short_backtrace::<std[9295f5ecf1531c2a]::panicking::begin_panic<rustc_errors[aa2fa569483a35a2]::ExplicitBug>::{closure#0}, !>
  10:     0x7fd8eb410fd6 - std[9295f5ecf1531c2a]::panicking::begin_panic::<rustc_errors[aa2fa569483a35a2]::ExplicitBug>
  11:     0x7fd8f06daf21 - <rustc_errors[aa2fa569483a35a2]::diagnostic_builder::BugAbort as rustc_errors[aa2fa569483a35a2]::diagnostic_builder::EmissionGuarantee>::emit_producing_guarantee
  12:     0x7fd8efaab223 - <rustc_errors[aa2fa569483a35a2]::DiagCtxt>::span_bug::<rustc_span[7e71af783b1896b5]::span_encoding::Span, alloc[ab03fe8b414083ab]::string::String>
  13:     0x7fd8efadea64 - rustc_middle[712429aa67461ada]::util::bug::opt_span_bug_fmt::<rustc_span[7e71af783b1896b5]::span_encoding::Span>::{closure#0}
  14:     0x7fd8efadeaba - rustc_middle[712429aa67461ada]::ty::context::tls::with_opt::<rustc_middle[712429aa67461ada]::util::bug::opt_span_bug_fmt<rustc_span[7e71af783b1896b5]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  15:     0x7fd8efad0c18 - rustc_middle[712429aa67461ada]::ty::context::tls::with_context_opt::<rustc_middle[712429aa67461ada]::ty::context::tls::with_opt<rustc_middle[712429aa67461ada]::util::bug::opt_span_bug_fmt<rustc_span[7e71af783b1896b5]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  16:     0x7fd8eb365857 - rustc_middle[712429aa67461ada]::util::bug::span_bug_fmt::<rustc_span[7e71af783b1896b5]::span_encoding::Span>
  17:     0x7fd8efac2831 - <rustc_infer[908d548d92158755]::infer::InferCtxt>::try_const_eval_resolve
  18:     0x7fd8ef843425 - <rustc_trait_selection[ec9264a6e6df17]::traits::select::SelectionContext>::evaluate_predicate_recursively::{closure#0}::{closure#0}
  19:     0x7fd8ef84231d - <rustc_trait_selection[ec9264a6e6df17]::traits::select::SelectionContext>::evaluate_predicate_recursively
  20:     0x7fd8ef9a7afc - <rustc_infer[908d548d92158755]::infer::InferCtxt>::probe::<core[da5ff848ab5b9634]::result::Result<rustc_middle[712429aa67461ada]::traits::select::EvaluationResult, rustc_middle[712429aa67461ada]::traits::select::OverflowError>, <rustc_trait_selection[ec9264a6e6df17]::traits::select::SelectionContext>::evaluation_probe<<rustc_trait_selection[ec9264a6e6df17]::traits::select::SelectionContext>::evaluate_root_obligation::{closure#0}>::{closure#0}>
  21:     0x7fd8ef95bee3 - rustc_trait_selection[ec9264a6e6df17]::traits::coherence::overlap
  22:     0x7fd8ef95b8da - rustc_trait_selection[ec9264a6e6df17]::traits::coherence::overlapping_impls
  23:     0x7fd8ee5c9648 - <rustc_hir_analysis[70120cffb8a4fd07]::coherence::inherent_impls_overlap::InherentOverlapChecker>::check_for_overlapping_inherent_impls
  24:     0x7fd8ee5c58ff - rustc_hir_analysis[70120cffb8a4fd07]::coherence::inherent_impls_overlap::crate_inherent_impls_overlap_check
  25:     0x7fd8ef3a2c8a - rustc_query_impl[c09cc8fff495313c]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c09cc8fff495313c]::query_impl::crate_inherent_impls_overlap_check::dynamic_query::{closure#2}::{closure#0}, rustc_middle[712429aa67461ada]::query::erase::Erased<[u8; 0usize]>>
  26:     0x7fd8ef41b518 - <rustc_query_impl[c09cc8fff495313c]::query_impl::crate_inherent_impls_overlap_check::dynamic_query::{closure#2} as core[da5ff848ab5b9634]::ops::function::FnOnce<(rustc_middle[712429aa67461ada]::ty::context::TyCtxt, ())>>::call_once
  27:     0x7fd8ef60c83b - rustc_query_system[3a5b469aacd7ee53]::query::plumbing::try_execute_query::<rustc_query_impl[c09cc8fff495313c]::DynamicConfig<rustc_query_system[3a5b469aacd7ee53]::query::caches::SingleCache<rustc_middle[712429aa67461ada]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[c09cc8fff495313c]::plumbing::QueryCtxt, false>
  28:     0x7fd8ef448b63 - rustc_query_impl[c09cc8fff495313c]::query_impl::crate_inherent_impls_overlap_check::get_query_non_incr::__rust_end_short_backtrace
  29:     0x7fd8ee668551 - <rustc_session[9285c94e3a71432f]::session::Session>::track_errors::<rustc_hir_analysis[70120cffb8a4fd07]::check_crate::{closure#2}, ()>
  30:     0x7fd8ee5ce2b3 - rustc_hir_analysis[70120cffb8a4fd07]::check_crate
  31:     0x7fd8eb66ccc0 - rustc_interface[b5ea119f6d9fba02]::passes::analysis
  32:     0x7fd8ef3a318a - rustc_query_impl[c09cc8fff495313c]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c09cc8fff495313c]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[712429aa67461ada]::query::erase::Erased<[u8; 1usize]>>
  33:     0x7fd8ef554708 - <rustc_query_impl[c09cc8fff495313c]::query_impl::analysis::dynamic_query::{closure#2} as core[da5ff848ab5b9634]::ops::function::FnOnce<(rustc_middle[712429aa67461ada]::ty::context::TyCtxt, ())>>::call_once
  34:     0x7fd8ef611fac - rustc_query_system[3a5b469aacd7ee53]::query::plumbing::try_execute_query::<rustc_query_impl[c09cc8fff495313c]::DynamicConfig<rustc_query_system[3a5b469aacd7ee53]::query::caches::SingleCache<rustc_middle[712429aa67461ada]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[c09cc8fff495313c]::plumbing::QueryCtxt, false>
  35:     0x7fd8ef437043 - rustc_query_impl[c09cc8fff495313c]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  36:     0x7fd8eb47f04b - <rustc_middle[712429aa67461ada]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[2320baa211b147c5]::run_compiler::{closure#0}::{closure#0}::{closure#3}, core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>>
  37:     0x7fd8eb506869 - <rustc_interface[b5ea119f6d9fba02]::interface::Compiler>::enter::<rustc_driver_impl[2320baa211b147c5]::run_compiler::{closure#0}::{closure#0}, core[da5ff848ab5b9634]::result::Result<core[da5ff848ab5b9634]::option::Option<rustc_interface[b5ea119f6d9fba02]::queries::Linker>, rustc_span[7e71af783b1896b5]::ErrorGuaranteed>>
  38:     0x7fd8eb4c8469 - rustc_span[7e71af783b1896b5]::set_source_map::<core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>, rustc_interface[b5ea119f6d9fba02]::interface::run_compiler<core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>, rustc_driver_impl[2320baa211b147c5]::run_compiler::{closure#0}>::{closure#0}::{closure#0}>
  39:     0x7fd8eb4ae7d3 - <scoped_tls[8787e17a3822f26a]::ScopedKey<rustc_span[7e71af783b1896b5]::SessionGlobals>>::set::<rustc_interface[b5ea119f6d9fba02]::util::run_in_thread_pool_with_globals<rustc_interface[b5ea119f6d9fba02]::interface::run_compiler<core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>, rustc_driver_impl[2320baa211b147c5]::run_compiler::{closure#0}>::{closure#0}, core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>>::{closure#0}, core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>>
  40:     0x7fd8eb4c8959 - rustc_span[7e71af783b1896b5]::create_session_globals_then::<core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>, rustc_interface[b5ea119f6d9fba02]::util::run_in_thread_pool_with_globals<rustc_interface[b5ea119f6d9fba02]::interface::run_compiler<core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>, rustc_driver_impl[2320baa211b147c5]::run_compiler::{closure#0}>::{closure#0}, core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>>::{closure#0}>
  41:     0x7fd8eb4b7cae - std[9295f5ecf1531c2a]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[b5ea119f6d9fba02]::util::run_in_thread_with_globals<rustc_interface[b5ea119f6d9fba02]::util::run_in_thread_pool_with_globals<rustc_interface[b5ea119f6d9fba02]::interface::run_compiler<core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>, rustc_driver_impl[2320baa211b147c5]::run_compiler::{closure#0}>::{closure#0}, core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>>::{closure#0}, core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>>
  42:     0x7fd8eb4b8ad1 - <<std[9295f5ecf1531c2a]::thread::Builder>::spawn_unchecked_<rustc_interface[b5ea119f6d9fba02]::util::run_in_thread_with_globals<rustc_interface[b5ea119f6d9fba02]::util::run_in_thread_pool_with_globals<rustc_interface[b5ea119f6d9fba02]::interface::run_compiler<core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>, rustc_driver_impl[2320baa211b147c5]::run_compiler::{closure#0}>::{closure#0}, core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>>::{closure#0}, core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[da5ff848ab5b9634]::result::Result<(), rustc_span[7e71af783b1896b5]::ErrorGuaranteed>>::{closure#1} as core[da5ff848ab5b9634]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  43:     0x7fd8ea95c685 - std::sys::unix::thread::Thread::new::thread_start::h0316d03ce42d35a5
  44:     0x7fd8ea694ac3 - start_thread
                               at ./nptl/pthread_create.c:442:8
  45:     0x7fd8ea726660 - clone3
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
  46:                0x0 - <unknown>

[sjwang05]

Fixed by #119060--possibly a duplicate of #118545?