Crash when using UI Dropdowns

Unity Engine
1

I haven’t been able to create a minimal example of this crash, as it appears to occur based on something that happens with the database backend being used (and creating a minimal project with that backend would violate confidentiality), but here’s what I do know:

  • 5.5.2 evertything’s fine
  • 5.6.1 it crashes
  • Crashes in the emulator and on the device
  • When it crashes, the dropdown items stop rendering properly (that is, immediately on opening the dropdown the items are displayed, but as soon as the gaze point shifts, even a pixel, it crashes)
  • Does not happen when the items are supplied to the dropdown via the Unity Editor Inspector
  • Does not happen when adding items to the menu via hard-code, i.e. Start() { List lst = …; dropdown.AddOptions(lst); } (this is exactly how it is being handled with the values-from-the-database)
  • Currently selected item in the dropdown (blacked out, below) continues to render fine, even as it’s selection item stops rendering
  • Crash occurs in pure Unity Engine code, no user code is referenced in the stack trace

2

Hello,

Can you provide the full call stack and any errors or other asserts in the unity log that might help with investigating the crash?

3

Here’s the full call stack.
I tried to get a crash dump as well, but it didn’t generate; I’ll keep trying.

>    UnityPlayer.dll!EvaluateObjectDepth(struct RenderLoopContext const &,class AABB const &,float,float &,float &)    Unknown
    UnityPlayer.dll!BuildRenderObjectData()    Unknown
    UnityPlayer.dll!DoRenderLoop(struct RenderLoop &,enum RenderingPath,struct CullResults &,struct ShadowMapCache &,bool)    Unknown
    UnityPlayer.dll!Camera::smile:efaultPerformRenderFunction::hushed:perator()(class Camera *,enum RenderingPath,struct CullResults *)    Unknown
    UnityPlayer.dll!Camera::MultiCustomRender(struct CullResults &,class Camera::performRenderFunction * const *,unsigned int,bool)    Unknown
    UnityPlayer.dll!Camera::smile:oRender(struct CullResults &,struct SharedRendererScene const &,enum Camera::RenderFlag,class Camera::performRenderFunction *)    Unknown
    UnityPlayer.dll!Camera::CustomRender(struct CullResults &,struct ShaderPassContext &,struct CameraRenderingParams const *,enum Camera::RenderFlag,class Camera::performRenderFunction *)    Unknown
    UnityPlayer.dll!Camera::Render(struct CullResults &,struct ShaderPassContext &,struct CameraRenderingParams const *,enum Camera::RenderFlag)    Unknown
    UnityPlayer.dll!Camera::smile:efaultPerformEyeRenderFunction::hushed:perator()(class Camera *,struct CullResults *,enum Camera::RenderFlag)    Unknown
    UnityPlayer.dll!Camera::RenderStereo(enum Camera::RenderFlag,enum CullFlag,class Camera::performEyeRenderFunction *)    Unknown
    UnityPlayer.dll!DoRenderScreenCamera()    Unknown
    UnityPlayer.dll!RenderManager::RenderCameras(int,void (*)(void))    Unknown
    UnityPlayer.dll!PlayerRender(bool)    Unknown
    UnityPlayer.dll!`InitPlayerLoopCallbacks'::`2'::postLateUpdateFinishFrameRenderingstruct::Forward()    Unknown
    UnityPlayer.dll!PlayerLoop(void)    Unknown
    UnityPlayer.dll!metro::MainLoop(bool)    Unknown
    UnityPlayer.dll!UnityPlayer::AppCallbacks::smile:oPerformUpdateAndRender(void)    Unknown
    UnityPlayer.dll!UnityPlayer::AppCallbacks::performUpdateAndRender(void)    Unknown
    UnityPlayer.dll!UnityPlayer::AppCallbacks::_AppThreadImplementation(void *)    Unknown
    UnityPlayer.dll!UnityPlayer::AppCallbacks::_AppThread(void *)    Unknown
    UnityPlayer.dll!<lambda>(void)()    Unknown
    UnityPlayer.dll!Platform::smile:etails::__abi_FunctorCapture<class <lambda_3e1924211b9579f8e542f5342662ee9c>,void,struct Windows::Foundation::IAsyncAction ^>::Invoke(struct Windows::Foundation::IAsyncAction ^)    Unknown
    UnityPlayer.dll!Windows::System::Threading::WorkItemHandler::Invoke(struct Windows::Foundation::IAsyncAction ^)    Unknown
    UnityPlayer.dll!Windows::System::Threading::WorkItemHandler::[Windows::System::Threading::WorkItemHandler::__abi_IDelegate]::__abi_Windows_System_Threading_WorkItemHandler___abi_IDelegate____abi_Invoke(struct Windows::Foundation::IAsyncAction ^)    Unknown
    threadpoolwinrt.dll!6d264c6f()    Unknown
    [Frames below may be incorrect and/or missing, no symbols loaded for threadpoolwinrt.dll]  
    [External Code]