▶ CRASH [expected OK] /html/semantics/embedded-content/the-iframe-element/change_parentage.html
│
│ Xlib: extension "XFree86-VidModeExtension" missing on display ":0".
│ ERROR:constellation::constellation: Panic: called `Option::unwrap()` on a `None` value
│ ERROR:constellation::constellation: Backtrace:
│ frame #0 - 0x00007f71d010466d - backtrace::backtrace::trace::hccde8df28b4db2a2
│ frame #1 - 0x00007f71d01045f5 - backtrace::capture::Backtrace::new::h42f95930bb8c5ee8
│ frame #2 - 0x00007f71cf15adc9 - _<F as alloc..boxed..FnBox<A>>::call_box::h89adae1a802be550
│ frame #3 - 0x00007f71d00f5ea8 - util::panicking::initiate_panic_hook::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::he2b22674ad1748f3
│ frame #4 - 0x00007f71d03c07cc - std::panicking::rust_panic_with_hook::h983af77c1a2e581b
│ frame #5 - 0x00007f71d03dabd1 - std::panicking::begin_panic::he426e15a3766089a
│ frame #6 - 0x00007f71d03c203a - std::panicking::begin_panic_fmt::hdddb415186c241e7
│ frame #7 - 0x00007f71d03dab6e - rust_begin_unwind
│ frame #8 - 0x00007f71d041116f - core::panicking::panic_fmt::hf4e16cb7f0d41a25
│ frame #9 - 0x00007f71d0411448 - core::panicking::panic::h907815f47e914305
│ frame #10 - 0x00007f71cef7cc81 - script::dom::event::Event::new_uninitialized::h05ae188a870e92b9
│ frame #11 - 0x00007f71cef84b3b - script::dom::event::Event::new::h7a12c706eaf845bc
│ frame #12 - 0x00007f71cefcb95c - script::dom::eventtarget::EventTarget::fire_event::h0d5b30039f5820d2
│ frame #13 - 0x00007f71cf1cd7fa - script::task_source::dom_manipulation::DOMManipulationTask::handle_task::h0ea31f97e475cb7a
│ frame #14 - 0x00007f71cf1652c5 - script::script_thread::ScriptThread::handle_msg_from_script::h47e979ae1e7fb676
│ frame #15 - 0x00007f71cf1b1d9f - script::script_thread::ScriptThread::handle_msgs::_$u7b$$u7b$closure$u7d$$u7d$::hb50cf7fd97943b65
│ frame #16 - 0x00007f71cf19a0e9 - script::script_thread::ScriptThread::handle_msgs::h1e1abab71191c950
│ frame #17 - 0x00007f71cf159447 - std::panicking::try::call::h78dcd5319adf08fa
│ frame #18 - 0x00007f71d03e4dcb - __rust_try
│ frame #19 - 0x00007f71d03e4d6e - __rust_maybe_catch_panic
│ frame #20 - 0x00007f71cf15a72d - _<F as alloc..boxed..FnBox<A>>::call_box::hce043844655ea6a9
│ frame #21 - 0x00007f71d03d8d94 - std::sys::thread::Thread::new::thread_start::h9c883b6d445ece46
│ frame #22 - 0x00007f71cc242181 - start_thread
│ frame #23 - 0x00007f71cbd5947c - __clone
│ frame #24 - 0x0000000000000000 - <unknown>
