Invalid object in GC:

Development Programming & Scripting
1

[2019.08.22-17.14.58:718][226]LogUObjectArray: Warning: Other object in slot
[2019.08.22-17.14.58:719][226]LogUObjectArray: Warning: Other object in slot
[2019.08.22-17.14.58:719][226]LogUObjectArray: Warning: Other object in slot
[2019.08.22-17.14.58:719][226]LogUObjectArray: Warning: Other object in slot
Fatal error: [File:D:\Build++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp] [Line: 603]
Invalid object in GC: 0x00000134624d5f80, ReferencingObject: BP_FutDoubBarr_C /Game/Levels/ZombieSurvivalLevel/Arenas/UEDPIE_0_Level_SurvivalArena_One.Level_SurvivalArena_One:PersistentLevel.BP_FutDoubBarr_C_2, ReferencingObjectClass: BlueprintGeneratedClass /Game/Items/Weapons/Guns/Futuristic/DoubleBarrel/BP_FutDoubBarr.BP_FutDoubBarr_C, Property Name: SpawnedMod, Offset: 8, TokenIndex: 30
UE4Editor-Win64-DebugGame.exe has triggered a breakpoint.

UE4Editor-Win64-DebugGame.exe has triggered a breakpoint.

Hi all,

I am getting the above crash frequently when using a weapon modification system that I built. I am not sure why the GC is taking issue with this item, I think I have traced the item to be a local variable that I intiated with a spawned actor (modification) I am also getting hundreds of the Warning: Other object in slot Logs, I am not sure if this is related or a separate issue?

Thanks

2

Found another question with the same problem, which said the issue was due to pointer variables that were not initialized to nullptr and were being added to an array uninitialized.

2 Likes
3

Thanks Spiderminded, I’ve checked this and I don’t think it is the issue. The “Spawned Mod” is a local variable and not an array, and I’ve looked into all additions to arrays in this module and cant seem to find anything!

4

Did you find a reason?

5

I had the same issue.

Upon carefully examining the log, I noticed the following error close to the editor startup:

    ObjectProperty FL0EquipmentRecipe::Image is not initialized properly

To resolve the crash, I added a nullptr to the property, and the issue was resolved:

UPROPERTY(EditDefaultsOnly, BlueprintReadOnly)
UTexture2D* Image = nullptr;
2 Likes