ICE while compiling piston-gfx_texture

[dobrite]

While compiling piston-gfx_texture v0.3.0
PistonDevelopers/gfx_texture#67

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
thread 'rustc' panicked at 'no entry found for key', ../src/libcore/option.rs:332

stack backtrace:
   1:        0x10771d7d0 - sys::backtrace::tracing::imp::write::h8eb606f0676b1c68Sqs
   2:        0x1077245eb - panicking::on_panic::h439344cab6a0722eKXw
   3:        0x1076e6312 - rt::unwind::begin_unwind_inner::h208ecd91d43787c9Msw
   4:        0x1076e709d - rt::unwind::begin_unwind_fmt::hf44048ddc5eaca53Srw
   5:        0x1077241f7 - rust_begin_unwind
   6:        0x107767780 - panicking::panic_fmt::hd63ccd83aea7a95388E
   7:        0x1044d4e3c - middle::region::RegionMaps::lookup_code_extent::h79ca6c63fd2282e8XtM
   8:        0x10439950a - middle::region::RegionMaps::node_extent::hd5c126474fdac37aduM
   9:        0x103e95ab2 - check::regionck::visit_expr::h5bee824ec8eb42cbYXc
  10:        0x103e913f1 - check::regionck::regionck_expr::h2328ab0d8df9ce4fFoc
  11:        0x103f2d196 - check::CheckItemTypesVisitor<'a, 'tcx>.Visitor<'tcx>::visit_ty::hf7c585d35e19050eErp
  12:        0x103f2cede - visit::walk_path::h17066397228797825325
  13:        0x103f2e046 - visit::walk_generics::h9324826419166596983
  14:        0x103f2df31 - visit::Visitor::visit_fn::h12805300175219594938
  15:        0x103f2cd93 - visit::walk_item::h12260364110452110519
  16:        0x103fe7c8c - check_crate::hab56984f02914bb3szE
  17:        0x10381bdea - driver::phase_3_run_analysis_passes::closure.21701
  18:        0x1037fd92a - middle::ty::ctxt<'tcx>::create_and_enter::h17306982840569711098
  19:        0x1037f9105 - driver::phase_3_run_analysis_passes::h17425279237084051649
  20:        0x1037d9ad5 - driver::compile_input::he87cc9423ff645a1Yba
  21:        0x10393d750 - run_compiler::h3fee87f6f710fd16eqc
  22:        0x10393b049 - boxed::F.FnBox<A>::call_box::h16432922749427286300
  23:        0x10393aa42 - rt::unwind::try::try_fn::h2840794312642008657
  24:        0x1077241a8 - __rust_try
  25:        0x1077103b0 - rt::unwind::try::inner_try::h1851ddf9ecd93c2fFow
  26:        0x10393abf2 - boxed::F.FnBox<A>::call_box::h3074866770647242799
  27:        0x10772351d - sys::thread::Thread::new::thread_start::hc131c4deb753ff20oNv
  28:     0x7fff8de3b267 - _pthread_body
  29:     0x7fff8de3b1e4 - _pthread_start

Could not compile `piston-gfx_texture`.

rustc --version --verbose:
rustc 1.4.0-nightly (779b2a9 2015-09-04)
binary: rustc
commit-hash: 779b2a9
commit-date: 2015-09-04
host: x86_64-apple-darwin
release: 1.4.0-nightly

🍻

[alexispurslane]

Does anyone have an idea as to how to track down this bug? It looks like Rust itself is accessing an undefined key, and then the libstd hash is doing a .expect()

[jdm]

The first step is to isolate the code that's triggering the problem. Running with RUSTLOG=debug will yield an incredible amount of debug output, but it may help track down the source of the problem.

[Manishearth]

#28151