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Upgrade to Qt6 #1848

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@ksuprynowicz ksuprynowicz commented Oct 12, 2025

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@ksuprynowicz ksuprynowicz added help wanted Extra attention is needed work in progress Do not merge yet labels Oct 12, 2025
@ksuprynowicz ksuprynowicz force-pushed the qt6-upgrade-rebase-1 branch 2 times, most recently from 82cf870 to b381dcd Compare October 12, 2025 18:05
@ada-tv
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ada-tv commented Oct 18, 2025

Interesting warnings

[10/19 05:14:51] [DEBUG] [default] OffscreenQmlSurface::onFocusObjectChanged object is not QQuickItem

[10/19 05:14:48] [DEBUG] [hifi.entities] bad avatarEntityData json "71626a..." (elided, very long blob of hex digits)

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ada-tv commented Oct 18, 2025

Random crash related to entity fading with a very long backtrace:

Thread 73 "RenderThread" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff397fa6c0 (LWP 152514)]
0x0000555555882984 in std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_get_use_count (this=0x100000001)
    at /usr/include/c++/15.2.1/bits/shared_ptr_base.h:229
229	        return __atomic_load_n(&_M_use_count, __ATOMIC_RELAXED);
(gdb) bt
#0  0x0000555555882984 in std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_get_use_count (this=0x100000001)
    at /usr/include/c++/15.2.1/bits/shared_ptr_base.h:229
#1  std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_add_ref_lock_nothrow
    (this=0x100000001) at /usr/include/c++/15.2.1/bits/shared_ptr_base.h:271
#2  0x000055555588b414 in std::__shared_count<(__gnu_cxx::_Lock_policy)2>::__shared_count (this=0x7fff397f6518, __r=<optimized out>)
    at /usr/include/c++/15.2.1/bits/shared_ptr_base.h:1256
#3  0x00007fffeae3827a in std::__shared_ptr<ZoneEntityItem, (__gnu_cxx::_Lock_policy)2>::__shared_ptr (this=this@entry=0x7fff397f6510, __r=...)
    at /usr/include/c++/15.2.1/bits/shared_ptr_base.h:1739
#4  0x00007fffeae254a1 in std::shared_ptr<ZoneEntityItem>::shared_ptr
    (this=0x7fff397f6510, __r=<error reading variable: Cannot access memory at address 0x100000009>) at /usr/include/c++/15.2.1/bits/shared_ptr.h:535
#5  std::weak_ptr<ZoneEntityItem>::lock (this=0x55557e60c4a8)
    at /usr/include/c++/15.2.1/bits/shared_ptr.h:874
#6  EntityTreeRenderer::LayeredZones::hasFade
    (this=0x55556c6349f0, type=type@entry=TransitionType::ELEMENT_ENTER_DOMAIN)
    at /home/ada/src/overte-qt6/libraries/entities-renderer/src/EntityTreeRenderer.cpp:1532
#7  0x00007fffeae8d0ba in EntityTreeRenderer::layeredZonesHaveFade
    (this=<optimized out>, type=TransitionType::ELEMENT_ENTER_DOMAIN)
    at /home/ada/src/overte-qt6/libraries/entities-renderer/src/EntityTreeRenderer.h:150
#8  render::entities::ModelEntityRenderer::doRenderUpdateAsynchronousTyped
    (this=0x55557c45e170, entity=warning: RTTI symbol not found for class 'std::_Sp_counted_deleter<RenderableModelEntityItem*, RenderableModelEntityItem::factory(EntityItemID const&, EntityItemProperties const&)::{lambda(RenderableModelEntityItem*)#1}, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
warning: RTTI symbol not found for class 'std::_Sp_counted_deleter<RenderableModelEntityItem*, RenderableModelEntityItem::factory(EntityItemID const&, EntityItemProperties const&)::{lambda(RenderableModelEntityItem*)#1}, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
std::shared_ptr<RenderableModelEntityItem> (use count 20, weak count 2) = {...})
    at /home/ada/src/overte-qt6/libraries/entities-renderer/src/RenderableModelEntityItem.cpp:1414
#9  0x00007fffeae1255c in render::entities::TypedEntityRenderer<RenderableModelEntityItem>::doRenderUpdateAsynchronous
    (this=0x55557c45e170, entity=<optimized out>)
    at /home/ada/src/overte-qt6/build/libraries/entities-renderer/entities-renderer_autogen/UVLADIE3JM/../../../../../libraries/entities-renderer/src/RenderableEntityItem.h:234
#10 0x00007fffeae551c5 in operator()
    (__closure=<optimized out>, self=<optimized out>)
    at /home/ada/src/overte-qt6/libraries/entities-renderer/src/RenderableEntityItem.cpp:547
#11 0x00007fffeae55229 in std::__invoke_impl<void, render::entities::EntityRenderer::updateInScene(const render::ScenePointer&, render::Transaction&)::<lambda(render::PayloadProxyInterface&)>&, render::PayloadProxyInterface&>
    (__f=<optimized out>) at /usr/include/c++/15.2.1/bits/invoke.h:62
#12 std::__invoke_r<void, render::entities::EntityRenderer::updateInScene(const render::ScenePointer&, render::Transaction&)::<lambda(render::PayloadProxyInterface&)>&, render::PayloadProxyInterface&> (__fn=<optimized out>)
    at /usr/include/c++/15.2.1/bits/invoke.h:113
#13 std::_Function_handler<void(render::PayloadProxyInterface&), render::entities::EntityRenderer::updateInScene(const render::ScenePointer&, render::Transaction&)::<lambda(render::PayloadProxyInterface&)> >::_M_invoke(const std::_Any_data &, render::PayloadProxyInterface &)
    (__functor=<optimized out>, __args#0=<optimized out>)
    at /usr/include/c++/15.2.1/bits/std_function.h:292
#14 0x00007fffeae6664e in std::function<void(render::PayloadProxyInterface&)>::operator() (this=this@entry=0x555581aa7908, __args#0=<optimized out>)
    at /usr/include/c++/15.2.1/bits/std_function.h:593
#15 0x00007fffeae66696 in render::Payload<render::PayloadProxyInterface>::update (this=0x55557c45e820, functor=<optimized out>)
    at /home/ada/src/overte-qt6/libraries/render/src/render/Item.h:648
#16 0x00007fffe72e4333 in render::Item::update
    (this=this@entry=0x7fff344f02a0, updateFunctor=std::shared_ptr<render::Item::UpdateFunctorInterface> (use count 2, weak count 0) = {...})
    at /home/ada/src/overte-qt6/libraries/render/src/render/Item.cpp:78
#17 0x00007fffe72f68cb in render::Scene::updateItems
    (this=this@entry=0x5555565f7b50, transactions=std::vector of length 136, capacity 136 = {...}) at /usr/include/c++/15.2.1/tuple:249
#18 0x00007fffe72f7a06 in render::Scene::processTransactionFrame
    (this=this@entry=0x5555565f7b50, transaction=...)
    at /home/ada/src/overte-qt6/libraries/render/src/render/Scene.cpp:272
#19 0x00007fffe72f7c9d in render::Scene::processTransactionQueue
    (this=0x5555565f7b50)
    at /home/ada/src/overte-qt6/libraries/render/src/render/Scene.cpp:246
#20 0x00007fffe73059f0 in render::PerformSceneTransaction::run
    (this=this@entry=0x55556ec63648, renderContext=std::shared_ptr<render::RenderContext> (use count 1, weak count 0) = {...})
    at /home/ada/src/overte-qt6/libraries/render/src/render/SceneTask.cpp:20
#21 0x00007fffe97480e9 in task::jobRun<render::PerformSceneTransaction, std::shared_ptr<render::RenderContext> >
    (data=..., jobContext=std::shared_ptr<render::RenderContext> (use count 1, weak count 0) = {...}, input=<optimized out>, output=...)
    at /home/ada/src/overte-qt6/libraries/task/src/task/Task.h:101
#22 0x00007fffe9748373 in task::Job<render::RenderContext, render::RenderTimeProfiler>::Model<render::PerformSceneTransaction, render::PerformSceneTransactionConfig, task::JobNoIO, task::JobNoIO>::run
    (this=0x55556ec63610, jobContext=std::shared_ptr<render::RenderContext> (use count 1, weak count 0) = {...})
    at /home/ada/src/overte-qt6/libraries/task/src/task/Task.h:180
#23 0x000055555593f586 in task::Job<render::RenderContext, render::RenderTimeProfiler>::run
    (this=0x55556eaca1b0, jobContext=std::shared_ptr<render::RenderContext> (use count 1, weak count 0) = {...})
    at /home/ada/src/overte-qt6/libraries/task/src/task/Task.h:218
#24 0x00005555559f55a6 in task::Task<render::RenderContext, render::RenderTimeProfiler>::TaskModel<UpdateSceneTask, task::JobConfig, task::JobNoIO, task::JobNoIO>::run
    (this=<optimized out>, jobContext=std::shared_ptr<render::RenderContext> (use count 1, weak count 0) = {...})
    at /home/ada/src/overte-qt6/libraries/task/src/task/Task.h:336
#25 0x000055555593f586 in task::Job<render::RenderContext, render::RenderTimeProfiler>::run
    (this=0x555574851768, jobContext=std::shared_ptr<render::RenderContext> (use count 1, weak count 0) = {...})
    at /home/ada/src/overte-qt6/libraries/task/src/task/Task.h:218
#26 0x00007fffe72dcfc6 in task::Task<render::RenderContext, render::RenderTimeProfiler>::TaskModel<EngineTask, task::JobConfig, task::JobNoIO, task::JobNoIO>::run
    (this=<optimized out>, jobContext=std::shared_ptr<render::RenderContext> (use count 1, weak count 0) = {...})
    at /home/ada/src/overte-qt6/libraries/task/src/task/Task.h:336
#27 0x000055555593f586 in task::Job<render::RenderContext, render::RenderTimeProfiler>::run
    (this=0x55556c701cd0, jobContext=std::shared_ptr<render::RenderContext> (use count 1, weak count 0) = {...})
    at /home/ada/src/overte-qt6/libraries/task/src/task/Task.h:218
#28 0x00007fffe72df98d in task::Engine<render::RenderContext, render::RenderTimeProfiler>::run (this=<optimized out>, jobContext=<optimized out>)
    at /home/ada/src/overte-qt6/libraries/task/src/task/Task.h:525
#29 0x00005555559f5475 in task::Engine<render::RenderContext, render::RenderTimeProfiler>::run (this=<optimized out>)
    at /home/ada/src/overte-qt6/libraries/task/src/task/Task.h:519
#30 0x00005555559f31e8 in GraphicsEngine::render_runRenderFrame
    (this=this@entry=0x55556c71fcb0, renderArgs=renderArgs@entry=0x7fff397f8130) at /home/ada/src/overte-qt6/interface/src/graphics/GraphicsEngine.cpp:130
#31 0x00005555559f4257 in GraphicsEngine::render_performFrame
    (this=0x55556c71fcb0)
    at /home/ada/src/overte-qt6/interface/src/graphics/GraphicsEngine.cpp:293
#32 0x00005555559f484c in operator() (__closure=<optimized out>)
    at /home/ada/src/overte-qt6/interface/src/graphics/GraphicsEngine.cpp:52
#33 std::__invoke_impl<void, GraphicsEngine::initializeGPU(GLWidget*)::<lambda()>&> (__f=<optimized out>) at /usr/include/c++/15.2.1/bits/invoke.h:63
#34 std::__invoke_r<void, GraphicsEngine::initializeGPU(GLWidget*)::<lambda()>&> (__fn=<optimized out>) at /usr/include/c++/15.2.1/bits/invoke.h:113
#35 std::_Function_handler<void(), GraphicsEngine::initializeGPU(GLWidget*)::<lambda()> >::_M_invoke(const std::_Any_data &) (__functor=<optimized out>)
    at /usr/include/c++/15.2.1/bits/std_function.h:292
#36 0x00005555557facee in std::function<void()>::operator()
    (this=this@entry=0x55556d2bfe20)
    at /usr/include/c++/15.2.1/bits/std_function.h:593
#37 0x0000555555a00325 in RenderEventHandler::render
    (this=this@entry=0x55556d2bfdf0)
    at /home/ada/src/overte-qt6/interface/src/graphics/RenderEventHandler.cpp:43
#38 0x0000555555a03198 in RenderEventHandler::event
    (this=0x55556d2bfdf0, event=<optimized out>)
    at /home/ada/src/overte-qt6/interface/src/graphics/RenderEventHandler.cpp:50
#39 0x00007fffdab020a0 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
    () at /usr/lib/libQt6Widgets.so.6
#40 0x0000555555845623 in Application::notify
    (this=0x7fffffffc130, object=0x55556d2bfdf0, event=0x7fff344cc4b0)
    at /home/ada/src/overte-qt6/interface/src/Application_Events.cpp:64
#41 0x00007fffe9d6a6c8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
    () at /usr/lib/libQt6Core.so.6
#42 0x00007fffe9d6aab2 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt6Core.so.6
#43 0x00007fffea04db18 in ??? () at /usr/lib/libQt6Core.so.6
#44 0x00007fffda906f4d in ??? () at /usr/lib/libglib-2.0.so.0
#45 0x00007fffda908617 in ??? () at /usr/lib/libglib-2.0.so.0
#46 0x00007fffda908825 in g_main_context_iteration ()
    at /usr/lib/libglib-2.0.so.0
#47 0x00007fffea04a9d2 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt6Core.so.6
#48 0x00007fffe9d75a86 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt6Core.so.6
#49 0x00007fffe9e8af7e in QThread::exec() () at /usr/lib/libQt6Core.so.6
#50 0x00007fffe9f30ca9 in ??? () at /usr/lib/libQt6Core.so.6
#51 0x00007fffda2969cb in ??? () at /usr/lib/libc.so.6
#52 0x00007fffda31aa0c in ??? () at /usr/lib/libc.so.6

@RTUnreal RTUnreal mentioned this pull request Oct 23, 2025
Merged
5 tasks
ksuprynowicz and others added 21 commits January 5, 2026 19:56
@ksuprynowicz
Initial upgrade to Qt6
876cf60
@ksuprynowicz
Initial work on upgrading QML to Qt6
bc17f35
@ada-tv @ksuprynowicz
Get Qt6 compiling and running, get QML starting
fa8f6b0
@ada-tv @ksuprynowicz
Comment out enough QML to get the desktop starting, though framebuffe…
510754f 
…rs broken
@ksuprynowicz
VrMenu fixes for Qt6, part 1
bd892bc
@ksuprynowicz
VRMenu fixes for Qt6
db3589c
@ksuprynowicz
QQuickWebEngineView fixes for Qt6
50a5d05
@ksuprynowicz
Fix QML OpenGL contexts
2f6f4dd
@ada-tv @ksuprynowicz
Fix a handful of Qt6 crashes, flow now works properly
226c7a4
@ksuprynowicz
Metaobject-related fixes
05364f8
@ksuprynowicz
Add a check for catching MOC-related invoke bug
7594f31
@ksuprynowicz
Remove glm::quat from scripting API
d002c02
@ksuprynowicz
Remove glm::vec3 from scripting API
d8dbf09
@ksuprynowicz
Smaller script API types fixes for Qt6
bab5c94
@ksuprynowicz
Work around QVariant copy bug
010a267
@ksuprynowicz
More workarounds for MOC typedef bug
320bd98
@ksuprynowicz
Fixed memory safety issue in ScriptObjectV8Proxy
1d734d5
@ksuprynowicz
Re-enable QML rendering
aa0f26c
@ada-tv @ksuprynowicz
Qt6: QML render target now set up properly, QML web entities rendering
985582a
@ksuprynowicz
Removed properties with missing font
5aac563
@ksuprynowicz
Fixed glm::mat4 typedefs for MOC
6145db6
RTUnreal and others added 14 commits January 5, 2026 20:41
@RTUnreal @ksuprynowicz
fix typing and implement more QDebug stuff
079106f
@RTUnreal @ksuprynowicz
fix more errors
f2d3ab3
@JulianGro @ksuprynowicz
Angle was removed from Qt6 for Windows.
3255202 
https://doc.qt.io/qt-6/opengl-changes-qt6.html#removal-of-angle
The `--no-angle` option now throws an error: `Unknown option 'no-angle'.`
@RTUnreal @ksuprynowicz
switch from fromUint128 to default constructor
c688af9
@RTUnreal @ksuprynowicz
explicitly construct QByteArray
1256a5a
@RTUnreal @ksuprynowicz
fix changed class name
4dc3940
@ksuprynowicz
Fixed mouse movement issue on Qt6
ebf228e
@ada-tv @ksuprynowicz
Fix mouse and touches on Web entities
c5d4fc6
@ada-tv @ksuprynowicz
Use virtual pointer device on QML desktop
59d094b 
This won't change anything on desktop, but the VR desktop should work
properly now
@ksuprynowicz
Fix timestamps for offscreen UI
ef710c1
@ksuprynowicz
Qt6 input events debugging and fixes
001ade6
@ksuprynowicz
Fix MOC issue with pointer scripting on Qt6
b2de7d2
@ksuprynowicz
Fix web entity inputs
ef188e7
@ksuprynowicz
Post-rebase fixes
cc7f1db
ada-tv and others added 15 commits January 13, 2026 23:52
@ada-tv @ksuprynowicz
Fixes for existing overhauled QML
8026ecc
@ada-tv @ksuprynowicz
First pass of More app and Places app
485d2ed
@ada-tv @ksuprynowicz
Sort by ID instead of alphabetically, quicker 'has users' button, pla…
c77cb76 
…ce favorite button
@ada-tv @ksuprynowicz
More app retries, mistake fixups
e6f0f40
@ada-tv @ksuprynowicz
Use periodic shuffling in Places app, prefer places with thumbnails
7a5cc2f
@ada-tv @ksuprynowicz
Add nametag visibility to settings
90401d7
@ada-tv @ksuprynowicz
Show domain in user count, place portals
5ee7859
@ada-tv @ksuprynowicz
Fix avatar app edit having empty fields if the "add new" button was c…
f5e02e1 
…licked
@ada-tv @ksuprynowicz
Widen portal text entity, update todo list
6c59bb5
@ada-tv @ksuprynowicz
Restore HTML places app and shelve the QML one for later
9ddc488
@ada-tv @ksuprynowicz
External app list support in More app
1d7063d
@ada-tv @ksuprynowicz
More settings
a09cdcb
@ada-tv @ksuprynowicz
Remove YouTube forced 30 FPS on Web entities, WidgetZoo scroll backgr…
8181384 
…ound
@ada-tv @ksuprynowicz
Image embeds in chat app
d552a22
@ksuprynowicz
Merge pull request #1887 from ada-tv/qt6/qml-overhaul2
82e3f05 
QML Overhaul 2
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