Anyone else having Sprite Packer crashing? Known workarounds?

Seems that the Sprite Packer in Unity 5.0 has some very crash-prone code (happens about 50-75% of the time when running the game in editor). Curious if anyone knows what is causing this, or if there is a known workaround? (Besides disabling sprite packing)

Code (csharp):

1.  
2. ... snip ...
3. -     Placed sprite in page (  3) at (   0, 1606). Page is now (1542, 1918). Sprite: "Centrifuge_Tooth08".
4. -     Placed sprite in page (  3) at (  51,    0). Page is now (1542, 1918). Sprite: "Bio_Switch".
5.  
6. Dereferencing NULL PPtr!
7. UnityEditor.Sprites.Packer:RebuildAtlasCacheIfNeeded(BuildTarget, Boolean, Execution)
8. UnityEditor.Sprites.Packer:RebuildAtlasCacheIfNeeded(BuildTarget, Boolean) (at C:\buildslave\unity\build\artifacts\generated\common\editor\SpritePackerBindings.gen.cs:64)
9. UnityEditor.Sprites.PackerWindow:DoToolbarGUI() (at C:\buildslave\unity\build\Editor\Mono\Sprites\SpritePackerWindow.cs:150)
10. UnityEditor.Sprites.PackerWindow:OnGUI() (at C:\buildslave\unity\build\Editor\Mono\Sprites\SpritePackerWindow.cs:284)
11. System.Reflection.MonoMethod:InternalInvoke(Object, Object[], Exception&)
12. System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222)
13. System.Reflection.MethodBase:Invoke(Object, Object[]) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Reflection/MethodBase.cs:115)
14. UnityEditor.HostView:Invoke(String, Object) (at C:\buildslave\unity\build\Editor\Mono\GUI\DockArea.cs:244)
15. UnityEditor.HostView:Invoke(String) (at C:\buildslave\unity\build\Editor\Mono\GUI\DockArea.cs:237)
16. UnityEditor.DockArea:OnGUI() (at C:\buildslave\unity\build\Editor\Mono\GUI\DockArea.cs:681)
17.  
18. [c:\buildslave\unity\build\runtime\baseclasses\BaseObject.h line 988]
19. (Filename: /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Reflection/MonoMethod.cs Line: 222)
20.  

Code (csharp):

1. 0000000140D7468A (Unity) CachedSpriteAtlas::FindSpriteRenderData
2. 0000000140D74C2F (Unity) SpriteAtlasCache::FindSpriteRenderDataMRU
3. 0000000140D69E05 (Unity) SpritePacker::GetPackedSpriteRD
4. 00000001403212DB (Unity) Sprite::RefreshAtlasRD
5. 0000000140D6A399 (Unity) std::_Dest_val<std::allocator<BlockMask>,BlockMask>
6. 0000000140D715A5 (Unity) Atlas::Pack
7. 0000000140D7362E (Unity) SpritePacker::RebuildAtlasCacheIfNeeded
8. 00000001412878B1 (Unity) Packer_CUSTOM_RebuildAtlasCacheIfNeeded
9. 0000000041D61313 (Mono JIT Code) (wrapper managed-to-native) UnityEditor.Sprites.Packer:RebuildAtlasCacheIfNeeded (UnityEditor.BuildTarget,bool,UnityEditor.Sprites.Packer/Execution)
10. 0000000041D6120C (Mono JIT Code) [C:\buildslave\unity\build\artifacts\generated\common\editor\SpritePackerBindings.gen.cs:64] UnityEditor.Sprites.Packer:RebuildAtlasCacheIfNeeded (UnityEditor.BuildTarget,bool)
11. 0000000041D55B92 (Mono JIT Code) [C:\buildslave\unity\build\Editor\Mono\Sprites\SpritePackerWindow.cs:150] UnityEditor.Sprites.PackerWindow:DoToolbarGUI ()
12. 0000000041D525E1 (Mono JIT Code) [C:\buildslave\unity\build\Editor\Mono\Sprites\SpritePackerWindow.cs:284] UnityEditor.Sprites.PackerWindow:OnGUI ()
13. ... (snip) ...
14.  

Ive submitted a bug for this, but it does not have a reproduction case, since I do not have the authority to try and strip our project down to the base essentials, watermark all of our sprites, etc etc - since it seems to only happen with our project, as far as I know.

 

If anyone else runs into this issue, the solution seems to be deleting your non-essential / temporary folders and letting Unity re-generate them. In my case, I deleted "Library", "Temp", and "obj".

So far the issue has yet to re-occur (crossing fingers). My guess is that there were still lingering library files from my Unity 4 -> 5 upgrade that were causing issues.

 

experiencing the same

 

@Wisteso : THANK GOD you posted this!! I was going nuts about it, already thinking about needing to switch to a third party sprite packer and essentially throwing away work of several months.

SOLUTION: Deleting the Library folder and let unity rebuild everything from scratch!