QtWebengine 6.8 (dev) doesn't render with basic html files

With a basic QML QtWebengine app, the webengine doesn't render anything and I get the following output in the console. This is with QtWebengine compiled from dev (6a5a1f7f3153c155b13efe01d1c470823bf9bbdf) . I also observe the same things with some QtWidgets/KDE apps like KMail. Previous builds from a few months ago were working fine, unfortunately bisecting the issue with webengine is a bit tricky on my laptop.


 

[22870:7:0426/113123.284582:FATAL:picture_layer_tiling.cc(480)] Check failed: tile_i_ < tiling_->tiling_data_.num_tiles_x() (0 vs. 0)
#0 0x7f2036277e69 base::debug::CollectStackTrace()
#1 0x7f203623f41c base::debug::StackTrace::StackTrace()
#2 0x7f203623f3d2 base::debug::StackTrace::StackTrace()
#3 0x7f2036003dff logging::LogMessage::~LogMessage()
#4 0x7f203600e64e logging::(anonymous namespace)::DCheckLogMessage::~DCheckLogMessage()
#5 0x7f203600e66a logging::(anonymous namespace)::DCheckLogMessage::~DCheckLogMessage()
#6 0x7f203600efc9 logging::CheckError::~CheckError()
#7 0x7f2038ce52fb cc::PictureLayerTiling::CoverageIterator::operator++()
#8 0x7f2038ce517a cc::PictureLayerTiling::CoverageIterator::CoverageIterator()
#9 0x7f2038ceacd8 cc::PictureLayerTilingSet::CoverageIterator::operator++()
#10 0x7f2038cea569 cc::PictureLayerTilingSet::CoverageIterator::CoverageIterator()
#11 0x7f2038bdfc7a cc::PictureLayerImpl::AppendQuads()
#12 0x7f2038d85ada cc::LayerTreeHostImpl::CalculateRenderPasses()
#13 0x7f2038d87317 cc::LayerTreeHostImpl::PrepareToDraw()
#14 0x7f2038e1c915 cc::ProxyImpl::DrawInternal()
#15 0x7f2038e1b0a5 cc::ProxyImpl::ScheduledActionDrawIfPossible()
#16 0x7f2038e936f0 cc::Scheduler::DrawIfPossible()
#17 0x7f2038e9447e cc::Scheduler::ProcessScheduledActions()
#18 0x7f2038e93554 cc::Scheduler::OnBeginImplFrameDeadline()
#19 0x7f2038ecbc41 base::internal::FunctorTraits<>::Invoke<>()
#20 0x7f2038ec771e base::internal::InvokeHelper<>::MakeItSo<>()
#21 0x7f2038ec2dfa base::internal::Invoker<>::RunImpl<>()
#22 0x7f2038ebe1de base::internal::Invoker<>::RunOnce()
#23 0x7f202a00a478 base::OnceCallback<>::Run()
#24 0x7f20361fb4b0 base::DeadlineTimer::OnScheduledTaskInvoked()
#25 0x7f20361ffb26 base::internal::FunctorTraits<>::Invoke<>()
#26 0x7f20361ff63c base::internal::InvokeHelper<>::MakeItSo<>()
#27 0x7f20361ff105 base::internal::Invoker<>::RunImpl<>()
#28 0x7f20361fe98d base::internal::Invoker<>::Run()
#29 0x7f202a00a478 base::OnceCallback<>::Run()
#30 0x7f2036135390 base::TaskAnnotator::RunTaskImpl()
#31 0x7f2036189096 base::TaskAnnotator::RunTask<>()
#32 0x7f2036181e54 base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoWorkImpl()
#33 0x7f2036181335 base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoWork()
#34 0x7f203604f1a2 base::MessagePumpDefault::Run()
#35 0x7f20361827b2 base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run()
#36 0x7f20360da231 base::RunLoop::Run()
#37 0x7f203486614f blink::scheduler::NonMainThreadImpl::SimpleThreadImpl::Run()
#38 0x7f20361d9e40 base::SimpleThread::ThreadMain()
#39 0x7f2036227556 base::(anonymous namespace)::ThreadFunc()
#40 0x7f20268ac897 start_thread
#41 0x7f2026933674 {}GI{}_clone
Task trace:
#0 0x7f2038e9334b cc::Scheduler::ScheduleBeginImplFrameDeadline()
#1 0x7f20387ebdb3 cc::UniqueNotifier::Schedule()
#2 0x7f2038d02f31 cc::(anonymous namespace)::TaskSetFinishedTaskImpl::TaskSetFinished()
#3 0x7f2038c88ebc cc::CategorizedWorkerPoolJob::Start()

[22782:22782:0426/113126.950808:INFO:web_contents_delegate_qt.cpp(282)] ProcessGone: 3 (133)