{"action":"opened","issue":{"url":"https://api.github.com/repos/servo/servo/issues/8674","labels_url":"https://api.github.com/repos/servo/servo/issues/8674/labels{/name}","comments_url":"https://api.github.com/repos/servo/servo/issues/8674/comments","events_url":"https://api.github.com/repos/servo/servo/issues/8674/events","html_url":"https://github.com/servo/servo/issues/8674","id":118793729,"number":8674,"title":"iframe.goBack() panics","user":{"login":"paulrouget","id":373579,"avatar_url":"https://avatars.githubusercontent.com/u/373579?v=3","gravatar_id":"","url":"https://api.github.com/users/paulrouget","html_url":"https://github.com/paulrouget","followers_url":"https://api.github.com/users/paulrouget/followers","following_url":"https://api.github.com/users/paulrouget/following{/other_user}","gists_url":"https://api.github.com/users/paulrouget/gists{/gist_id}","starred_url":"https://api.github.com/users/paulrouget/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/paulrouget/subscriptions","organizations_url":"https://api.github.com/users/paulrouget/orgs","repos_url":"https://api.github.com/users/paulrouget/repos","events_url":"https://api.github.com/users/paulrouget/events{/privacy}","received_events_url":"https://api.github.com/users/paulrouget/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-11-25T09:25:45Z","updated_at":"2015-11-25T09:25:45Z","closed_at":null,"body":"```html\r\n<iframe mozbrowser=\"true\" src=\"data:text/html,<script>location.assign('data:,x')</script>\"></iframe>\r\n<script>\r\n  var iframe = document.querySelector(\"iframe\");\r\n  iframe.addEventListener(\"mozbrowserloadend\", () => iframe.goBack());\r\n</script>\r\n```\r\n\r\n```\r\nthread 'ScriptTask PipelineId { namespace_id: PipelineNamespaceId(1), index: PipelineIndex(0) }' panicked at 'assertion failed: self.suspended_since.get().is_some()', /Users/paul/git/servo/components/script/timers.rs:349\r\nstack backtrace:\r\n   1:        0x1041ec728 - sys::backtrace::tracing::imp::write::h662793599f713c74T5s\r\n   2:        0x1041ee90f - panicking::log_panic::_<closure>::closure.38923\r\n   3:        0x1041ee3b9 - panicking::log_panic::h87af6096e0b6fa7c4Uw\r\n   4:        0x1041da0d6 - sys_common::unwind::begin_unwind_inner::h1e338bc64cf56d9dr8r\r\n   5:        0x10237e147 - sys_common::unwind::begin_unwind::begin_unwind::h442923392230891188\r\n   6:        0x102b9bcd7 - timers::_<impl>::resume::hd7c50b6547582733YW1\r\n   7:        0x102b9bbdb - dom::window::_<impl>::thaw::h6dcbc1ebb597eb086cV\r\n   8:        0x102c89100 - script_task::_<impl>::handle_thaw_msg::hda0bd12aaf56888eX2Z\r\n   9:        0x102c8612c - script_task::_<impl>::handle_msg_from_constellation::h4b19eddbc2adee90GCZ\r\n  10:        0x102c84961 - script_task::_<impl>::handle_msgs::_<closure>::closure.157149\r\n  11:        0x102c84552 - script_task::_<impl>::profile_event::h9736138210224090807\r\n  12:        0x102c57239 - script_task::_<impl>::handle_msgs::h3a5fe9faeff19152nqZ\r\n  13:        0x102c03e00 - script_task::_<impl>::start::h03d6119e050f589ddqZ\r\n  14:        0x102c03db4 - script_task::_<impl>::create::_<closure>::_<closure>::closure.155887\r\n  15:        0x102c03b20 - mem::_<impl>::run_with_memory_reporting::run_with_memory_reporting::h673928561397631059\r\n  16:        0x102bef68f - script_task::_<impl>::create::_<closure>::closure.155291\r\n  17:        0x102beec77 - util::task::spawn_named_with_send_on_failure::_<closure>::closure.155284\r\n  18:        0x102beebc7 - boxed::_<impl>::call_box::call_box::h15694691246183954468\r\n  19:        0x1023ad49b - boxed::_<impl>::call_once::call_once::h4242493320255577343\r\n  20:        0x1023ad06d - std::thread::_<impl>::spawn_inner::_<closure>::_<closure>::closure.116136\r\n  21:        0x1023ad019 - sys_common::unwind::try::try_fn::try_fn::h4943420568539498126\r\n  22:        0x1041ebbf8 - __rust_try\r\n  23:        0x1041e909e - sys_common::unwind::try::inner_try::hc13d8e198528cd0fZ4r\r\n  24:        0x1023acf83 - sys_common::unwind::try::try::h16910258665589907076\r\n  25:        0x1023acdfb - std::thread::_<impl>::spawn_inner::_<closure>::closure.116112\r\n  26:        0x1023ad71c - boxed::_<impl>::call_box::call_box::h11799493626222205043\r\n  27:        0x1041edcdd - sys::thread::_<impl>::new::thread_start::h906ddce3a93d4852ksw\r\n  28:     0x7fff98438c12 - _pthread_body\r\n  29:     0x7fff98438b8f - _pthread_start\r\nthread 'Constellation' panicked at 'unable to find pipeline - this is a bug', src/libcore/option.rs:333\r\n```"}}