316195 2026-06-03 03:49:12 -0700 [GStreamer] ASSERTION FAILED: track->streamId() == streamId 2026-06-06 12:03:13 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 vitaly philn philn webkit-bug-importer oldest_to_newest 2217164 0 vitaly 2026-06-03 03:49:12 -0700 Backtrace: ``` ASSERTION FAILED: track->streamId() == streamId ../../../Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp(1304) : void WebCore::MediaPlayerPrivateGStreamer::notifyPlayerOfTrack() [with TrackPrivateType = WebCore::VideoTrackPrivateGStreamer] 1 0x7f02d939cb21 void WebCore::MediaPlayerPrivateGStreamer::notifyPlayerOfTrack<WebCore::VideoTrackPrivateGStreamer>() 2 0x7f02d93a2734 WebCore::MediaPlayerPrivateGStreamer::handleMessage(_GstMessage*) 3 0x7f02d93a3c5e WTF::Detail::CallableWrapper<WebCore::MediaPlayerPrivateGStreamer::createGSTPlayBin(WTF::URL const&)::{lambda(_GstMessage*)#1}, void, _GstMessage*>::call(_GstMessage*) 4 0x7f02d9370d7d WebCore::connectSimpleBusMessageCallback(_GstElement*, WTF::Function<void (_GstMessage*)>&&, WebCore::AsynchronousPipelineDumping)::{lambda(_GstBus*, _GstMessage*, void*)#1}::_FUN(_GstBus*, _GstMessage*, void*) 5 0x7f02cbfe3646 g_cclosure_marshal_VOID__BOXEDv 6 0x7f02cbfe0329 _g_closure_invoke_va 7 0x7f02cbff6b8f signal_emit_valist_unlocked 8 0x7f02cbffc816 g_signal_emit_valist 9 0x7f02cbffc8d3 g_signal_emit 10 0x7f02ccce3688 gst_bus_async_signal_func 11 0x7f02ccce45c5 gst_bus_source_dispatch 12 0x7f02cbed4f7f g_main_dispatch 13 0x7f02cbed76f8 g_main_context_dispatch 14 0x7f02d5f52132 WTF::RunLoop::runGLibMainLoopIteration(WTF::RunLoop::MayBlock) 15 0x7f02d5f5279a WTF::RunLoop::run() 16 0x7f02d3983d46 int WebKit::AuxiliaryProcessMain<WebKit::WebProcessMainWPE>(int, char**) 17 0x7f02cce2a1ca __libc_start_call_main 18 0x7f02cce2a28b __libc_start_main 19 0x5646108c2705 _start WPEWebProcess terminated (pid 602834) for reason: crash ``` Test crashed: imported/w3c/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/underline_object/underline_namespace.html Build failed: https://build.webkit.org/results/WPE-Linux-64-bit-Release-Tests/314442@main%20(27769)/results.html 2217165 1 vitaly 2026-06-03 03:57:57 -0700 Test gardening pull request: https://github.com/WebKit/WebKit/pull/66358 2217168 2 ews-feeder 2026-06-03 04:01:11 -0700 Test gardening commit 314452@main (3a27cfcdaec9): <https://commits.webkit.org/314452@main> Reviewed commits have been landed. Closing PR #66358 and removing active labels. 2217169 3 philn 2026-06-03 04:07:08 -0700 That's weird, the crash appears as ImageFailure in https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fwebvtt%2Frendering%2Fcues-with-video%2Fprocessing-model%2Fselectors%2Fcue_function%2Funderline_object%2Funderline_namespace.html&platform=GTK&platform=WPE ?! 2217548 4 philn 2026-06-04 01:51:56 -0700 Pull request: https://github.com/WebKit/WebKit/pull/66439 2218298 5 ews-feeder 2026-06-06 12:02:40 -0700 Committed 314703@main (f23d4df64f2e): <https://commits.webkit.org/314703@main> Reviewed commits have been landed. Closing PR #66439 and removing active labels. 2218299 6 webkit-bug-importer 2026-06-06 12:03:13 -0700 <rdar://problem/178903264>