ICE on const generic array lenght when using opperator

[aDotInTheVoid]

Code:

#![feature(const_generics)]

struct Foo<const X: usize> {
    bar: [i32; X + 1],
}

Expected: Compiles Sucessfuly
Actual: ICE

rustc 1.41.0-nightly (412f43ac5 2019-11-24)
binary: rustc
commit-hash: 412f43ac5b4ae8c3599e71c6972112e9be4758fa
commit-date: 2019-11-24
host: x86_64-apple-darwin
release: 1.41.0-nightly
LLVM version: 9.0

Backtrace:

 $ RUST_BACKTRACE=1 cargo build
   Compiling const_vector v0.1.0 (/Users/nixon/dev/rs/const-vector)
warning: the feature `const_generics` is incomplete and may cause the compiler to crash
 --> src/lib.rs:1:12
  |
1 | #![feature(const_generics)]
  |            ^^^^^^^^^^^^^^
  |
  = note: `#[warn(incomplete_features)]` on by default

error: internal compiler error: src/librustc/ty/subst.rs:650: const parameter `X/#0` (Const { ty: usize, val: Param(X/#0) }/0) out of range when substituting substs=[]

thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:851:9
stack backtrace:
   0: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
   1: core::fmt::write
   2: std::io::Write::write_fmt
   3: std::panicking::default_hook::{{closure}}
   4: std::panicking::default_hook
   5: rustc_driver::report_ice
   6: std::panicking::rust_panic_with_hook
   7: std::panicking::begin_panic
   8: rustc_errors::HandlerInner::span_bug
   9: rustc_errors::Handler::span_bug
  10: rustc::util::bug::opt_span_bug_fmt::{{closure}}
  11: rustc::ty::context::tls::with_opt::{{closure}}
  12: rustc::ty::context::tls::with_opt
  13: rustc::util::bug::opt_span_bug_fmt
  14: rustc::util::bug::span_bug_fmt
  15: <rustc::ty::subst::SubstFolder as rustc::ty::fold::TypeFolder>::fold_const
  16: rustc::traits::codegen::<impl rustc::ty::context::TyCtxt>::subst_and_normalize_erasing_regions
  17: rustc_mir::interpret::operand::<impl rustc_mir::interpret::eval_context::InterpCx<M>>::eval_operand
  18: rustc_mir::interpret::step::<impl rustc_mir::interpret::eval_context::InterpCx<M>>::eval_rvalue_into_place
  19: rustc_mir::interpret::step::<impl rustc_mir::interpret::eval_context::InterpCx<M>>::run
  20: rustc_mir::const_eval::const_eval_raw_provider
  21: rustc::ty::query::__query_compute::const_eval_raw
  22: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
  23: rustc_mir::const_eval::const_eval_provider
  24: rustc::ty::query::__query_compute::const_eval
  25: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
  26: rustc_mir::const_eval::const_eval_provider
  27: rustc::ty::query::__query_compute::const_eval
  28: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::const_eval>::compute
  29: rustc::dep_graph::graph::DepGraph::with_task_impl
  30: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
  31: rustc::ty::sty::Const::eval
  32: <rustc::traits::project::AssocTypeNormalizer as rustc::ty::fold::TypeFolder>::fold_ty
  33: rustc::traits::project::normalize
  34: rustc_typeck::check::FnCtxt::normalize_associated_types_in
  35: <core::iter::adapters::Map<I,F> as core::iter::traits::iterator::Iterator>::fold
  36: rustc::ty::context::GlobalCtxt::enter_local
  37: rustc_typeck::check::wfcheck::check_item_well_formed
  38: rustc::ty::query::__query_compute::check_item_well_formed
  39: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::check_item_well_formed>::compute
  40: rustc::dep_graph::graph::DepGraph::with_task_impl
  41: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
  42: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::ensure_query
  43: __rust_maybe_catch_panic
  44: rustc_data_structures::sync::par_for_each_in
  45: __rust_maybe_catch_panic
  46: rustc::hir::Crate::par_visit_all_item_likes
  47: rustc::util::common::time
  48: rustc_typeck::check_crate
  49: rustc_interface::passes::analysis
  50: rustc::ty::query::__query_compute::analysis
  51: rustc::dep_graph::graph::DepGraph::with_task_impl
  52: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
  53: rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}
  54: rustc_interface::passes::create_global_ctxt::{{closure}}
  55: rustc_interface::passes::BoxedGlobalCtxt::enter
  56: rustc_interface::interface::run_compiler_in_existing_thread_pool
  57: std::thread::local::LocalKey<T>::with
  58: scoped_tls::ScopedKey<T>::set
  59: syntax::with_globals
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

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

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.41.0-nightly (412f43ac5 2019-11-24) running on x86_64-apple-darwin

note: compiler flags: -C debuginfo=2 -C incremental --crate-type lib

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [const_eval_raw] const-evaluating `Foo::bar::{{constant}}#0`
#1 [const_eval] const-evaluating + checking `Foo::bar::{{constant}}#0`
#2 [const_eval] const-evaluating + checking `Foo::bar::{{constant}}#0`
#3 [check_item_well_formed] processing `Foo`
#4 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error

error: could not compile `const_vector`.

To learn more, run the command again with --verbose.

[jonas-schievink]

Duplicate of #60619