Entering full screen mode in A-Blast panics

[jdm]

https://aframe.io/examples/showcase/a-blast

No current global object (thread ScriptThread PipelineId { namespace_id: PipelineNamespaceId(1), index: PipelineIndex(1) }, at src/libcore/option.rs:1187)
stack backtrace:
   0: backtrace::backtrace::trace
   1: backtrace::capture::Backtrace::new
   2: servo::main::{{closure}}
   3: std::panicking::rust_panic_with_hook
   4: std::panicking::continue_panic_fmt
   5: rust_begin_unwind
   6: core::panicking::panic_fmt
   7: core::option::expect_failed
   8: <script::dom::window::Window as script::dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods>::GetFrameElement
   9: script::dom::document::Document::get_allow_fullscreen
  10: <script::dom::element::ElementPerformFullscreenEnter as script::task::TaskOnce>::run_once
  11: <T as script::task::TaskBox>::run_box
  12: script::script_thread::ScriptThread::handle_msg_from_script
  13: _ZN6script13script_thread12ScriptThread11handle_msgs17he7e697a5f326da49E.llvm.7221316494555393413
  14: script::script_thread::ScriptThread::start
  15: profile_traits::mem::ProfilerChan::run_with_memory_reporting
  16: std::sys_common::backtrace::__rust_begin_short_backtrace
  17: _ZN3std9panicking3try7do_call17h0b17636d0137d4edE.llvm.1214290296415732513
  18: __rust_maybe_catch_panic
  19: core::ops::function::FnOnce::call_once{{vtable.shim}}
  20: <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once
  21: std::sys::unix::thread::Thread::new::thread_start
  22: _pthread_body
  23: _pthread_start