rustc backtrace

gistfile1.txt

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stderr:
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thread 'rustc' panicked at 'assertion failed: `(left == right)`
  left: `Size { raw: 2 }`,
 right: `Size { raw: 8 }`', src/librustc/mir/interpret/value.rs:367:17
stack backtrace:
   0: std::sys_common::backtrace::print
   1: std::panicking::default_hook::{{closure}}
   2: std::panicking::default_hook
   3: rustc::util::common::panic_hook
   4: std::panicking::rust_panic_with_hook
   5: std::panicking::continue_panic_fmt
   6: std::panicking::begin_panic_fmt
   7: rustc::mir::interpret::value::Scalar<Tag>::to_bits_or_ptr
   8: rustc_mir::interpret::cast::<impl rustc_mir::interpret::eval_context::InterpretCx<M>>::cast
   9: rustc_mir::transform::const_prop::ConstPropagator::const_prop
  10: <rustc_mir::transform::const_prop::ConstPropagator as rustc::mir::visit::MutVisitor>::visit_statement
  11: <rustc_mir::transform::const_prop::ConstProp as rustc_mir::transform::MirPass>::run_pass
  12: rustc_mir::transform::run_passes::{{closure}}
  13: rustc_mir::transform::run_passes
  14: rustc_mir::transform::optimized_mir
  15: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::optimized_mir>::compute
  16: rustc::dep_graph::graph::DepGraph::with_task_impl
  17: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
  18: rustc_mir::monomorphize::collector::collect_items_rec
  19: rustc_mir::monomorphize::collector::collect_crate_mono_items::{{closure}}
  20: rustc::util::common::time
  21: rustc_mir::monomorphize::collector::collect_crate_mono_items
  22: rustc::util::common::time
  23: rustc_mir::monomorphize::partitioning::collect_and_partition_mono_items
  24: rustc::ty::query::__query_compute::collect_and_partition_mono_items
  25: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors for rustc::ty::query::queries::collect_and_partition_mono_items>::compute
  26: rustc::dep_graph::graph::DepGraph::with_task_impl
  27: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt>::get_query
  28: rustc_codegen_ssa::base::codegen_crate
  29: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_utils::codegen_backend::CodegenBackend>::codegen_crate
  30: rustc::util::common::time
  31: rustc_interface::passes::start_codegen
  32: rustc::ty::context::tls::enter_global
  33: rustc_interface::passes::BoxedGlobalCtxt::access::{{closure}}
  34: rustc_interface::passes::create_global_ctxt::{{closure}}
  35: rustc_interface::passes::BoxedGlobalCtxt::enter
  36: rustc_interface::queries::Query<T>::compute
  37: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::ongoing_codegen
  38: rustc_interface::interface::run_compiler_in_existing_thread_pool
  39: std::thread::local::LocalKey<T>::with
  40: scoped_tls::ScopedKey<T>::set
  41: syntax::with_globals
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
query stack during panic:
#0 [optimized_mir] processing `main`
#1 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack

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/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.37.0-dev running on x86_64-apple-darwin

note: compiler flags: -Z threads=1 -Z ui-testing -Z unstable-options -C prefer-dynamic -C rpath -C debuginfo=0


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