ICE on rustc 1.34.0-nightly (633d75ac1 2019-02-21): `index out of bounds`

[niklasad1]

ICE when compiling parity-ethereum

➜  parity-ethereum git:(master) ✗ cargo build
   Compiling ethcore-miner v1.12.0 (...parity-ethereum/miner)
thread 'rustc' panicked at 'index out of bounds: the len is 2 but the index is 3', /rustc/633d75ac17fa1a1bdaf5923895e6d5b7f3040c92/src/libcore/slice/mod.rs:2539:10
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
   1: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:70
   2: std::panicking::default_hook::{{closure}}
             at src/libstd/sys_common/backtrace.rs:58
             at src/libstd/panicking.rs:200
   3: std::panicking::default_hook
             at src/libstd/panicking.rs:215
   4: rustc::util::common::panic_hook
   5: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:482
   6: std::panicking::continue_panic_fmt
             at src/libstd/panicking.rs:385
   7: rust_begin_unwind
             at src/libstd/panicking.rs:312
   8: core::panicking::panic_fmt
             at src/libcore/panicking.rs:85
   9: core::panicking::panic_bounds_check
             at src/libcore/panicking.rs:61
  10: <rustc_target::abi::TyLayout<'a, Ty>>::field
  11: rustc_mir::interpret::operand::<impl rustc_mir::interpret::eval_context::EvalContext<'a, 'mir, 'tcx, M>>::operand_field
  12: rustc_mir::interpret::operand::<impl rustc_mir::interpret::eval_context::EvalContext<'a, 'mir, 'tcx, M>>::eval_place_to_op
  13: rustc_mir::interpret::step::<impl rustc_mir::interpret::eval_context::EvalContext<'a, 'mir, 'tcx, M>>::run
  14: rustc_mir::const_eval::eval_body_using_ecx
  15: rustc_mir::const_eval::const_eval_raw_provider
  16: rustc::ty::query::__query_compute::const_eval_raw
  17: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::const_eval_raw<'tcx>>::compute
  18: rustc::dep_graph::graph::DepGraph::with_task_impl
  19: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
  20: rustc_mir::const_eval::const_eval_provider
  21: rustc::ty::query::__query_compute::const_eval
  22: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::const_eval<'tcx>>::compute
  23: rustc::dep_graph::graph::DepGraph::with_task_impl
  24: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
  25: rustc_mir::const_eval::const_eval_provider
  26: rustc::ty::query::__query_compute::const_eval
  27: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::const_eval<'tcx>>::compute
  28: rustc::dep_graph::graph::DepGraph::with_task_impl
  29: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
  30: rustc_mir::monomorphize::collector::collect_items_rec
  31: rustc_mir::monomorphize::collector::collect_crate_mono_items::{{closure}}
  32: rustc::util::common::time
  33: rustc_mir::monomorphize::collector::collect_crate_mono_items
  34: rustc::util::common::time
  35: rustc_mir::monomorphize::partitioning::collect_and_partition_mono_items
  36: rustc::ty::query::__query_compute::collect_and_partition_mono_items
  37: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::collect_and_partition_mono_items<'tcx>>::compute
  38: rustc::dep_graph::graph::DepGraph::with_task_impl
  39: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
  40: rustc_codegen_ssa::back::symbol_export::exported_symbols_provider_local
  41: rustc::ty::query::__query_compute::exported_symbols
  42: rustc::ty::query::<impl rustc::ty::query::config::QueryAccessors<'tcx> for rustc::ty::query::queries::exported_symbols<'tcx>>::compute
  43: rustc::dep_graph::graph::DepGraph::with_task_impl
  44: rustc::ty::query::plumbing::<impl rustc::ty::context::TyCtxt<'a, 'gcx, 'tcx>>::get_query
  45: rustc_metadata::encoder::encode_metadata
  46: rustc_metadata::cstore_impl::<impl rustc::middle::cstore::CrateStore for rustc_metadata::cstore::CStore>::encode_metadata
  47: rustc::ty::context::TyCtxt::encode_metadata
  48: rustc_codegen_llvm::base::write_metadata
  49: rustc::util::common::time
  50: rustc_codegen_ssa::base::codegen_crate
  51: <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_utils::codegen_backend::CodegenBackend>::codegen_crate
  52: rustc::util::common::time
  53: rustc_driver::driver::phase_4_codegen
  54: rustc_driver::driver::compile_input::{{closure}}
  55: <std::thread::local::LocalKey<T>>::with
  56: rustc::ty::context::TyCtxt::create_and_enter
  57: rustc_driver::driver::compile_input
  58: rustc_driver::run_compiler_with_pool
  59: <scoped_tls::ScopedKey<T>>::set
  60: rustc_driver::run_compiler
  61: syntax::with_globals
  62: __rust_maybe_catch_panic
             at src/libpanic_unwind/lib.rs:87
  63: <F as alloc::boxed::FnBox<A>>::call_box
  64: std::sys::unix::thread::Thread::new::thread_start
             at /rustc/633d75ac17fa1a1bdaf5923895e6d5b7f3040c92/src/liballoc/boxed.rs:749
             at src/libstd/sys_common/thread.rs:14
             at src/libstd/sys/unix/thread.rs:81
  65: start_thread
  66: __clone
query stack during panic:
#0 [const_eval_raw] const-evaluating `message::Message::create`
#1 [const_eval] const-evaluating + checking `message::Message::create`
#2 [const_eval] const-evaluating + checking `message::Message::create`
#3 [collect_and_partition_mono_items] collect_and_partition_mono_items
#4 [exported_symbols] exported_symbols
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 1.34.0-nightly (633d75ac1 2019-02-21) running on x86_64-unknown-linux-gnu

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

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

error: Could not compile `parity-whisper`.
warning: build failed, waiting for other jobs to finish...
error: build failed

[Centril]

cc @oli-obk @RalfJung

[oli-obk]

Is this a regression? Did it work with a previous nightly?

I'm currently looking through Message::create function (the ICE is during the evaluation of a promoted inside that function), but I can't find any promoteds 😕

[oli-obk]

I can't debug this right now, because a debugging compiler fails even earlier: #58638

[oli-obk]

So apparently

	pub fn create(params: CreateParams) -> Result<Self, EmptyTopics> {
		&Duration::from_millis(params.work);
		unimplemented!()
	}

still causes the ICE, but only inside the whisper crate. If I try to create an MCVE everything compiles just fine... Very confusing.

[pnkfelix]

triage: P-high. Looks to be in good hands.