This was found by enabling the float-cast-overflow check in UBSan and fuzzing. This type of issue can create inconsistencies across platforms, architectures and optimization levels.

Found with m-c 20220309-ae667f73a8f1

To enable this check add the following to your mozconfig:

ac_add_options --enable-undefined-sanitizer="float-cast-overflow"

The attached testcase calls window.printPreview() which is only accesible via a fuzzing build.

src/objdir-ff-ubsan/dist/include/nsCoord.h:363:60: runtime error: 2.24797e+09 is outside the range of representable values of type 'int'
    #0 0x7efeb5ae8ab3 in mozilla::layers::ScaleToOutsidePixelsOffset(nsRect, float, float, int, mozilla::gfx::PointTyped<mozilla::LayerPixel, float>) src/gfx/layers/wr/WebRenderCommandBuilder.cpp
    #1 0x7efeb5ae7847 in mozilla::layers::WebRenderCommandBuilder::DoGroupingForDisplayList(mozilla::nsDisplayList*, mozilla::nsDisplayItem*, mozilla::nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1489:7
    #2 0x7efeb5aea838 in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(mozilla::nsDisplayList*, mozilla::nsDisplayItem*, mozilla::nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, bool) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1775:5
    #3 0x7efebc48b405 in mozilla::nsDisplayWrapList::CreateWebRenderCommandsNewClipListOption(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, mozilla::nsDisplayListBuilder*, bool) src/layout/painting/nsDisplayList.cpp:4655:30
    #4 0x7efebc4ae643 in mozilla::nsDisplaySVGWrapper::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, mozilla::nsDisplayListBuilder*) src/layout/painting/nsDisplayList.cpp:8483:10
    #5 0x7efeb5aed57f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(mozilla::nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::nsDisplayListBuilder*) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1695:41
    #6 0x7efeb5aebae2 in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(mozilla::nsDisplayList*, mozilla::nsDisplayItem*, mozilla::nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, bool) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1934:7
    #7 0x7efebc49da52 in mozilla::nsDisplayTransform::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, mozilla::nsDisplayListBuilder*) src/layout/painting/nsDisplayList.cpp:6718:30
    #8 0x7efeb5aed57f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(mozilla::nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::nsDisplayListBuilder*) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1695:41
    #9 0x7efeb5aebae2 in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(mozilla::nsDisplayList*, mozilla::nsDisplayItem*, mozilla::nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, bool) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1934:7
    #10 0x7efebc49da52 in mozilla::nsDisplayTransform::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, mozilla::nsDisplayListBuilder*) src/layout/painting/nsDisplayList.cpp:6718:30
    #11 0x7efeb5aed57f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(mozilla::nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::nsDisplayListBuilder*) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1695:41
    #12 0x7efeb5aebae2 in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(mozilla::nsDisplayList*, mozilla::nsDisplayItem*, mozilla::nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, bool) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1934:7
    #13 0x7efebc49da52 in mozilla::nsDisplayTransform::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, mozilla::nsDisplayListBuilder*) src/layout/painting/nsDisplayList.cpp:6718:30
    #14 0x7efeb5aed57f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(mozilla::nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::nsDisplayListBuilder*) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1695:41
    #15 0x7efeb5aebae2 in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(mozilla::nsDisplayList*, mozilla::nsDisplayItem*, mozilla::nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, bool) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1934:7
    #16 0x7efebc49da52 in mozilla::nsDisplayTransform::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, mozilla::nsDisplayListBuilder*) src/layout/painting/nsDisplayList.cpp:6718:30
    #17 0x7efeb5aed57f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(mozilla::nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::nsDisplayListBuilder*) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1695:41
    #18 0x7efeb5aebae2 in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(mozilla::nsDisplayList*, mozilla::nsDisplayItem*, mozilla::nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, bool) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1934:7
    #19 0x7efebc49da52 in mozilla::nsDisplayTransform::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, mozilla::nsDisplayListBuilder*) src/layout/painting/nsDisplayList.cpp:6718:30
    #20 0x7efeb5aed57f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(mozilla::nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::nsDisplayListBuilder*) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1695:41
    #21 0x7efeb5aebae2 in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(mozilla::nsDisplayList*, mozilla::nsDisplayItem*, mozilla::nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, bool) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1934:7
    #22 0x7efebc49da52 in mozilla::nsDisplayTransform::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, mozilla::nsDisplayListBuilder*) src/layout/painting/nsDisplayList.cpp:6718:30
    #23 0x7efeb5aed57f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(mozilla::nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::nsDisplayListBuilder*) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1695:41
    #24 0x7efeb5aebae2 in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(mozilla::nsDisplayList*, mozilla::nsDisplayItem*, mozilla::nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, bool) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1934:7
    #25 0x7efebc49da52 in mozilla::nsDisplayTransform::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, mozilla::nsDisplayListBuilder*) src/layout/painting/nsDisplayList.cpp:6718:30
    #26 0x7efeb5aed57f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(mozilla::nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::nsDisplayListBuilder*) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1695:41
    #27 0x7efeb5aebae2 in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(mozilla::nsDisplayList*, mozilla::nsDisplayItem*, mozilla::nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, bool) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1934:7
    #28 0x7efebc48b405 in mozilla::nsDisplayWrapList::CreateWebRenderCommandsNewClipListOption(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, mozilla::nsDisplayListBuilder*, bool) src/layout/painting/nsDisplayList.cpp:4655:30
    #29 0x7efebc490dcb in mozilla::nsDisplayWrapList::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, mozilla::nsDisplayListBuilder*) src/layout/painting/nsDisplayList.h:4922:12
    #30 0x7efebc490dcb in mozilla::nsDisplayOwnLayer::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::layers::RenderRootStateManager*, mozilla::nsDisplayListBuilder*) src/layout/painting/nsDisplayList.cpp:5281:22
    #31 0x7efeb5aed57f in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommands(mozilla::nsDisplayItem*, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::layers::StackingContextHelper const&, mozilla::nsDisplayListBuilder*) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1695:41
    #32 0x7efeb5aebae2 in mozilla::layers::WebRenderCommandBuilder::CreateWebRenderCommandsFromDisplayList(mozilla::nsDisplayList*, mozilla::nsDisplayItem*, mozilla::nsDisplayListBuilder*, mozilla::layers::StackingContextHelper const&, mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, bool) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1934:7
    #33 0x7efeb5ae99b2 in mozilla::layers::WebRenderCommandBuilder::BuildWebRenderCommands(mozilla::wr::DisplayListBuilder&, mozilla::wr::IpcResourceUpdateQueue&, mozilla::nsDisplayList*, mozilla::nsDisplayListBuilder*, mozilla::layers::WebRenderScrollData&, WrFiltersHolder&&) src/gfx/layers/wr/WebRenderCommandBuilder.cpp:1616:5
    #34 0x7efeb5b0a4f6 in mozilla::layers::WebRenderLayerManager::EndTransactionWithoutLayer(mozilla::nsDisplayList*, mozilla::nsDisplayListBuilder*, WrFiltersHolder&&, mozilla::layers::WebRenderBackgroundData*, double) src/gfx/layers/wr/WebRenderLayerManager.cpp:362:30
    #35 0x7efebc470156 in mozilla::nsDisplayList::PaintRoot(mozilla::nsDisplayListBuilder*, gfxContext*, unsigned int, mozilla::Maybe<double>) src/layout/painting/nsDisplayList.cpp:2288:18
    #36 0x7efebbd8de94 in nsLayoutUtils::PaintFrame(gfxContext*, nsIFrame*, nsRegion const&, unsigned int, mozilla::nsDisplayListBuilderMode, nsLayoutUtils::PaintFrameFlags) src/layout/base/nsLayoutUtils.cpp:3446:9
    #37 0x7efebbcb6072 in mozilla::PresShell::PaintInternal(nsView*, mozilla::PaintInternalFlags) src/layout/base/PresShell.cpp:6362:5
    #38 0x7efebbcb5470 in mozilla::PresShell::PaintAndRequestComposite(nsView*, mozilla::PaintFlags) src/layout/base/PresShell.cpp:6233:3
    #39 0x7efebb619f15 in nsViewManager::ProcessPendingUpdatesPaint(nsIWidget*) src/view/nsViewManager.cpp:440:18
    #40 0x7efebb619756 in nsViewManager::ProcessPendingUpdatesForView(nsView*, bool) src/view/nsViewManager.cpp:375:22
    #41 0x7efebb61b1bb in nsViewManager::ProcessPendingUpdates() src/view/nsViewManager.cpp:948:5
    #42 0x7efebbc34eb3 in nsRefreshDriver::Tick(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp, nsRefreshDriver::IsExtraTick) src/layout/base/nsRefreshDriver.cpp:2580:11
    #43 0x7efebbc44bb3 in mozilla::RefreshDriverTimer::TickDriver(nsRefreshDriver*, mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:350:13
    #44 0x7efebbc44bb3 in mozilla::RefreshDriverTimer::TickRefreshDrivers(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp, nsTArray<RefPtr<nsRefreshDriver> >&) src/layout/base/nsRefreshDriver.cpp:328:7
    #45 0x7efebbc44845 in mozilla::RefreshDriverTimer::Tick(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:344:5
    #46 0x7efebbc44337 in mozilla::VsyncRefreshDriverTimer::RunRefreshDrivers(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:788:5
    #47 0x7efebbc43969 in mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::TickRefreshDriver(mozilla::layers::BaseTransactionId<mozilla::VsyncIdType>, mozilla::TimeStamp) src/layout/base/nsRefreshDriver.cpp:693:16
    #48 0x7efebbc42b58 in mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::NotifyVsyncOnMainThread() src/layout/base/nsRefreshDriver.cpp:610:7
    #49 0x7efebbc424e9 in mozilla::VsyncRefreshDriverTimer::RefreshDriverVsyncObserver::NotifyVsync(mozilla::VsyncEvent const&) src/layout/base/nsRefreshDriver.cpp:516:9
    #50 0x7efeba9ac87a in mozilla::dom::VsyncMainChild::RecvNotify(mozilla::VsyncEvent const&, float const&) src/dom/ipc/VsyncMainChild.cpp:68:15
    #51 0x7efebadaff6a in mozilla::dom::PVsyncChild::OnMessageReceived(IPC::Message const&) src/objdir-ff-ubsan/ipc/ipdl/PVsyncChild.cpp:220:54
    #52 0x7efeb4bf4626 in mozilla::ipc::PBackgroundChild::OnMessageReceived(IPC::Message const&) src/objdir-ff-ubsan/ipc/ipdl/PBackgroundChild.cpp:6370:32
    #53 0x7efeb4b54a48 in mozilla::ipc::MessageChannel::DispatchAsyncMessage(mozilla::ipc::ActorLifecycleProxy*, IPC::Message const&) src/ipc/glue/MessageChannel.cpp:1674:25
    #54 0x7efeb4b52436 in mozilla::ipc::MessageChannel::DispatchMessage(mozilla::ipc::ActorLifecycleProxy*, IPC::Message&&) src/ipc/glue/MessageChannel.cpp:1599:9
    #55 0x7efeb4b52e66 in mozilla::ipc::MessageChannel::RunMessage(mozilla::ipc::ActorLifecycleProxy*, mozilla::ipc::MessageChannel::MessageTask&) src/ipc/glue/MessageChannel.cpp:1462:3
    #56 0x7efeb4b53885 in mozilla::ipc::MessageChannel::MessageTask::Run() src/ipc/glue/MessageChannel.cpp:1496:14
    #57 0x7efeb34a9afa in mozilla::RunnableTask::Run() src/xpcom/threads/TaskController.cpp:467:16
    #58 0x7efeb346a25f in mozilla::TaskController::DoExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) src/xpcom/threads/TaskController.cpp:770:26
    #59 0x7efeb34678ae in mozilla::TaskController::ExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) src/xpcom/threads/TaskController.cpp:606:15
    #60 0x7efeb3468004 in mozilla::TaskController::ProcessPendingMTTask(bool) src/xpcom/threads/TaskController.cpp:390:36
    #61 0x7efeb349b2f1 in mozilla::TaskController::InitializeInternal()::$_0::operator()() const src/xpcom/threads/TaskController.cpp:124:37
    #62 0x7efeb349b2f1 in mozilla::detail::RunnableFunction<mozilla::TaskController::InitializeInternal()::$_0>::Run() src/objdir-ff-ubsan/dist/include/nsThreadUtils.h:531:5
    #63 0x7efeb3486433 in nsThread::ProcessNextEvent(bool, bool*) src/xpcom/threads/nsThread.cpp:1173:16
    #64 0x7efeb348faf4 in NS_ProcessNextEvent(nsIThread*, bool) src/xpcom/threads/nsThreadUtils.cpp:467:10
    #65 0x7efeb4b5b902 in mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) src/ipc/glue/MessagePump.cpp:85:21
    #66 0x7efeb4b5cee2 in mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) src/ipc/glue/MessagePump.cpp:268:30
    #67 0x7efeb49cbb11 in MessageLoop::RunInternal() src/ipc/chromium/src/base/message_loop.cc:331:10
    #68 0x7efeb49cbb11 in MessageLoop::RunHandler() src/ipc/chromium/src/base/message_loop.cc:324:3
    #69 0x7efeb49cbb11 in MessageLoop::Run() src/ipc/chromium/src/base/message_loop.cc:306:3
    #70 0x7efebb711e08 in nsBaseAppShell::Run() src/widget/nsBaseAppShell.cpp:137:27
    #71 0x7efec0590d27 in XRE_RunAppShell() src/toolkit/xre/nsEmbedFunctions.cpp:870:20
    #72 0x7efeb4b5cec1 in mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) src/ipc/glue/MessagePump.cpp:235:9
    #73 0x7efeb49cbb11 in MessageLoop::RunInternal() src/ipc/chromium/src/base/message_loop.cc:331:10
    #74 0x7efeb49cbb11 in MessageLoop::RunHandler() src/ipc/chromium/src/base/message_loop.cc:324:3
    #75 0x7efeb49cbb11 in MessageLoop::Run() src/ipc/chromium/src/base/message_loop.cc:306:3
    #76 0x7efec058fe7d in XRE_InitChildProcess(int, char**, XREChildData const*) src/toolkit/xre/nsEmbedFunctions.cpp:729:34
    #77 0x7efec05a5020 in mozilla::BootstrapImpl::XRE_InitChildProcess(int, char**, XREChildData const*) src/toolkit/xre/Bootstrap.cpp:67:12
    #78 0x55ef72624495 in content_process_main(mozilla::Bootstrap*, int, char**) src/browser/app/../../ipc/contentproc/plugin-container.cpp:57:28
    #79 0x55ef726248a5 in main src/browser/app/nsBrowserApp.cpp:327:18
    #80 0x7efedc47dc86 in __libc_start_main /build/glibc-uZu3wS/glibc-2.27/csu/../csu/libc-start.c:310
    #81 0x55ef72573578 in _start (src/objdir-ff-ubsan/dist/bin/firefox+0xf4578)

Please ni? me if a Pernosco session would be helpful.

Looks similar to 1758983, also involving DisplayLists.

Probably related to bug 1758983.

Fixing this specific issue just results in more overflows, see bug 1758983 comment 5.

Should this be P1? And if so, what would be our next step to get this resolved?

Miko, thoughts on comment 5?

(In reply to Glenn Watson [:gw] from comment #5)

Should this be P1? And if so, what would be our next step to get this resolved?

Probably not.

The attached test case is no longer reproducible.

:miko, do you expect this to be fixed by the patch for bug 1758983

(In reply to Tyson Smith [:tsmith] from comment #8)

The attached test case is no longer reproducible.

:miko, do you expect this to be fixed by the patch for bug 1758983

I do not. Fixing this overflow requires more invasive changes to the code and it's not obvious what is the best way to do this.

I can still reproduce this locally. On my machine the testcase requires opening the print preview and navigating to fourth page. Maybe window.printPreview() does not work in automation anymore?

Oh yes you are correct. I made a mistake locally, sorry about that :)