Intermittent crash in /html/browsers/browsing-the-web/navigating-across-documents/009.html

[jdm]

▶ CRASH [expected TIMEOUT] /html/browsers/browsing-the-web/navigating-across-documents/009.html
  │ 
  │ ERROR:js::rust: Error at :0:13: document.write is not a function
  │ 
  │ thread 'ScriptThread PipelineId { namespace_id: PipelineNamespaceId(0), index: PipelineIndex(0) }' panicked at 'assertion failed: self.suspended_since.get().is_none()', /home/servo/buildbot/slave/linux-rel/build/components/script/timers.rs:347
  │ stack backtrace:
  │ ERROR:js::rust: Error at http://web-platform.test:8000/html/browsers/browsing-the-web/navigating-across-documents/href.html:1:0: parent.postMessage is not a function
  │ 
  │    1:     0x7f7c32959550 - sys::backtrace::tracing::imp::write::hd273f86d5325347aweu
  │    2:     0x7f7c3295c465 - panicking::default_handler::_<closure>::closure.42335
  │    3:     0x7f7c3295bf0f - panicking::default_handler::h907ce0af740f5f06spy
  │    4:     0x7f7c32945476 - sys_common::unwind::begin_unwind_inner::ha417239bcab1f2ff56s
  │    5:     0x7f7c315e192f - sys_common::unwind::begin_unwind::h2684407204376697228
  │    6:     0x7f7c31ad1583 - script_thread::ScriptThread::handle_msg_from_constellation::h389891135009220bbBh
  │    7:     0x7f7c31acef0e - script_thread::ScriptThread::handle_msgs::_<closure>::closure.169102
  │    8:     0x7f7c31ab8c3c - script_thread::ScriptThread::handle_msgs::he88d2b1869bd594b4ph
  │    9:     0x7f7c31a84677 - sys_common::unwind::try::try_fn::h13475504653987409668
  │   10:     0x7f7c329589f8 - __rust_try
  │   11:     0x7f7c32954cdb - sys_common::unwind::try::inner_try::h62f00e3d34dbb509D3s
  │   12:     0x7f7c31a85dfa - boxed::F.FnBox<A>::call_box::h13336923247159183181
  │   13:     0x7f7c3295acd3 - sys::thread::Thread::new::thread_start::hb3a0514b9d87669e1mx
  │   14:     0x7f7c2ef02181 - start_thread
  │   15:     0x7f7c2ea1947c - __clone
  │   16:                0x0 - <unknown>
  └ Pipeline failed in hard-fail mode.  Crashing!

More subtleties in the timer code.

[jdm]

Not timer code! This is actually the constellation happily attempting to navigate pages that shouldn't be allowed to make navigation requests.

[jdm]

Hasn't been seen in months; not disabled. Closing.