▶ CRASH [expected TIMEOUT] /resource-timing/nested-context-navigations-iframe.html
  │ 
  │ 
  │ 
  │ 
  │ called `Option::unwrap()` on a `None` value (thread ScriptThread PipelineId { namespace_id: PipelineNamespaceId(1), index: PipelineIndex(1) }, at src/libcore/option.rs:378)
  │ stack backtrace:
  │    0: servo::main::{{closure}}::h1a1a8e800082f764 (0x55e1522c5a3d)
  │    1: std::panicking::rust_panic_with_hook::h5a8f8e02156983ba (0x55e15556a66c)
  │              at src/libstd/panicking.rs:477
  │    2: std::panicking::continue_panic_fmt::h223917c13598c96e (0x55e15556a122)
  │              at src/libstd/panicking.rs:380
  │    3: rust_begin_unwind (0x55e15556a016)
  │              at src/libstd/panicking.rs:307
  │    4: core::panicking::panic_fmt::h1ecdacd738b2e246 (0x55e15558cb1a)
  │              at src/libcore/panicking.rs:84
  │    5: core::panicking::panic::hbe54e811bb1ba5a3 (0x55e15558ca59)
  │              at src/libcore/panicking.rs:49
  │    6: script::dom::window::Window::get_cx::h217496f526e50cd7 (0x55e152d0b4de)
  │    7: script::dom::htmlscriptelement::HTMLScriptElement::run_a_classic_script::h15d821d5af689061 (0x55e152fbcca6)
  │    8: script::dom::htmlscriptelement::HTMLScriptElement::execute::hb35d76b12ec7045e (0x55e152fbbeb6)
  │    9: script::dom::htmlscriptelement::HTMLScriptElement::prepare::h883d34e7fbdef79b (0x55e152fb86c8)
  │   10: script::dom::servoparser::ServoParser::do_parse_sync::h328807c4080c46b9 (0x55e152e25aa2)
  │   11: profile_traits::time::profile::h39d013c3b75dc5c6 (0x55e153084987)
  │   12: _ZN6script3dom11servoparser11ServoParser10parse_sync17h89fd8f1aadf696d9E.llvm.5503961049245743842 (0x55e152e254d9)
  │   13: <script::dom::servoparser::ParserContext as net_traits::FetchResponseListener>::process_response_chunk::hd3d6f294737e5d12 (0x55e152e2a8d6)
  │   14: script::script_thread::ScriptThread::handle_msg_from_constellation::hf803d3eeb43f24a0 (0x55e152ff912d)
  │   15: _ZN6script13script_thread12ScriptThread11handle_msgs17hab25fa90e4e7ecb0E.llvm.5407563969374112303 (0x55e152ff10da)
  │   16: script::script_thread::ScriptThread::start::h391552aaa124e061 (0x55e152feb358)
  │   17: profile_traits::mem::ProfilerChan::run_with_memory_reporting::h888d7b9745a9756d (0x55e15315033d)
  │   18: std::sys_common::backtrace::__rust_begin_short_backtrace::h7617d7b8109e17b0 (0x55e15346c789)
  │   19: _ZN3std9panicking3try7do_call17hc37f40a3c47d24c9E.llvm.14707422161893791402 (0x55e153572604)
  │   20: __rust_maybe_catch_panic (0x55e15557414a)
  │              at src/libpanic_unwind/lib.rs:80
  │   21: core::ops::function::FnOnce::call_once{{vtable.shim}}::hae2191359ba235d3 (0x55e152c7da03)
  │   22: <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h2d0849bafc182e1d (0x55e155558edf)
  │              at /rustc/ddf43867a9cbb3766b48552632a602498fae2699/src/liballoc/boxed.rs:922
  │   23: <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h8171021716485511 (0x55e155573490)
  │              at /rustc/ddf43867a9cbb3766b48552632a602498fae2699/src/liballoc/boxed.rs:922
  │       std::sys_common::thread::start_thread::h91415b8b18006386
  │              at src/libstd/sys_common/thread.rs:13
  │       std::sys::unix::thread::Thread::new::thread_start::h00f545530dc48cf2
  │              at src/libstd/sys/unix/thread.rs:79
  │   24: start_thread (0x7f9328b046ba)
  │   25: clone (0x7f932739f41d)
  │   26: <unknown> (0x0)
  │ [2019-09-27T20:08:31Z ERROR servo] called `Option::unwrap()` on a `None` value
  └ Pipeline failed in hard-fail mode.  Crashing!