internal compiler error with const_panic

[Pat-Lafon]

All of the below is from https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=3e260fdade759dfa8b326df7cd3487a3

I would have assumed I would get a type error from this?

Code

<code>
#![feature(const_panic)]

fn main() {
    const _: () = panic!(true);
}

Meta

rustc --version --verbose:

<version>
rustc 1.48.0-nightly (e2be5f568 2020-09-09)
binary: rustc
commit-hash: e2be5f568d1f60365b825530f5b5cb722460591b
commit-date: 2020-09-09
host: x86_64-apple-darwin
release: 1.48.0-nightly
LLVM version: 11.0

Error output

<output>
Compiling playground v0.0.1 (/playground)
thread 'rustc' panicked at '`ref_to_mplace` called on non-ptr type', compiler/rustc_mir/src/interpret/place.rs:292:47
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

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 1.48.0-nightly (e2be5f568 2020-09-09) running on x86_64-unknown-linux-gnu

note: compiler flags: -C embed-bitcode=no -C codegen-units=1 -C debuginfo=2 --crate-type bin

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

error: could not compile `playground`

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

Backtrace

<backtrace>Compiling playground v0.0.1 (/playground)
thread 'rustc' panicked at '`ref_to_mplace` called on non-ptr type', compiler/rustc_mir/src/interpret/place.rs:292:47
stack backtrace:
   0: rust_begin_unwind
             at /rustc/e2be5f568d1f60365b825530f5b5cb722460591b/library/std/src/panicking.rs:483
   1: core::panicking::panic_fmt
             at /rustc/e2be5f568d1f60365b825530f5b5cb722460591b/library/core/src/panicking.rs:85
   2: core::option::expect_failed
             at /rustc/e2be5f568d1f60365b825530f5b5cb722460591b/library/core/src/option.rs:1213
   3: rustc_mir::interpret::place::<impl rustc_mir::interpret::eval_context::InterpCx<M>>::ref_to_mplace
   4: rustc_mir::interpret::place::<impl rustc_mir::interpret::eval_context::InterpCx<M>>::deref_operand
   5: rustc_mir::const_eval::machine::<impl rustc_mir::interpret::eval_context::InterpCx<rustc_mir::const_eval::machine::CompileTimeInterpreter>>::hook_panic_fn
   6: <rustc_mir::const_eval::machine::CompileTimeInterpreter as rustc_mir::interpret::machine::Machine>::find_mir_or_eval_fn
   7: rustc_mir::interpret::terminator::<impl rustc_mir::interpret::eval_context::InterpCx<M>>::eval_fn_call
   8: rustc_mir::interpret::step::<impl rustc_mir::interpret::eval_context::InterpCx<M>>::run
   9: rustc_mir::const_eval::eval_queries::const_eval_raw_provider
  10: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::const_eval_raw>::compute
  11: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  12: rustc_data_structures::stack::ensure_sufficient_stack
  13: rustc_query_system::query::plumbing::get_query_impl
  14: rustc_mir::const_eval::eval_queries::const_eval_validated_provider
  15: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::const_eval_validated>::compute
  16: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  17: rustc_data_structures::stack::ensure_sufficient_stack
  18: rustc_query_system::query::plumbing::get_query_impl
  19: rustc_mir::const_eval::eval_queries::const_eval_validated_provider
  20: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::const_eval_validated>::compute
  21: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  22: rustc_data_structures::stack::ensure_sufficient_stack
  23: rustc_query_system::query::plumbing::get_query_impl
  24: rustc_middle::mir::interpret::queries::<impl rustc_middle::ty::context::TyCtxt>::const_eval_global_id
  25: rustc_middle::mir::interpret::queries::<impl rustc_middle::ty::context::TyCtxt>::const_eval_poly
  26: <rustc_lint::BuiltinCombinedLateLintPass as rustc_lint::passes::LateLintPass>::check_item
  27: rustc_hir::intravisit::Visitor::visit_nested_item
  28: rustc_hir::intravisit::walk_expr
  29: <rustc_lint::late::LateContextAndPass<T> as rustc_hir::intravisit::Visitor>::visit_expr
  30: <rustc_lint::late::LateContextAndPass<T> as rustc_hir::intravisit::Visitor>::visit_nested_body
  31: rustc_hir::intravisit::walk_item
  32: rustc_hir::intravisit::Visitor::visit_nested_item
  33: rustc_hir::intravisit::walk_crate
  34: rustc_lint::late::late_lint_crate
  35: rustc_data_structures::sync::join
  36: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
  37: rustc_session::utils::<impl rustc_session::session::Session>::time
  38: rustc_interface::passes::analysis
  39: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::analysis>::compute
  40: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
  41: rustc_data_structures::stack::ensure_sufficient_stack
  42: rustc_query_system::query::plumbing::get_query_impl
  43: rustc_interface::passes::QueryContext::enter
  44: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
  45: rustc_span::with_source_map
  46: scoped_tls::ScopedKey<T>::set
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

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 1.48.0-nightly (e2be5f568 2020-09-09) running on x86_64-unknown-linux-gnu

note: compiler flags: -C embed-bitcode=no -C codegen-units=1 -C debuginfo=2 --crate-type bin

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

query stack during panic:
#0 [const_eval_raw] const-evaluating `main::_`
#1 [const_eval_validated] const-evaluating + checking `main::_`
#2 [const_eval_validated] const-evaluating + checking `main::_`
#3 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `playground`

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

[jonas-schievink]

Duplicate of #76013