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randomwangran / OOP

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S3-90 Exception #18

Closed randomwangran closed 3 years ago

randomwangran commented 5 years ago

Crash issue without log.

Fatal error!

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000100

0x00000000B4B22C86 UE4Editor-Section03.dll!UGrabber::TickComponent() [c:\users\random\documents\rep\cpp\unreal\section03\source\section03\grabber.cpp:110]
0x00000000C173D828 UE4Editor-Engine.dll!UnknownFunction []
0x00000000C1770394 UE4Editor-Engine.dll!UnknownFunction []
0x00000000C24470BB UE4Editor-Engine.dll!UnknownFunction []
0x00000000C244C793 UE4Editor-Engine.dll!UnknownFunction []
0x00000000CD45B713 UE4Editor-Core.dll!UnknownFunction []
0x00000000CD45BD3A UE4Editor-Core.dll!UnknownFunction []
0x00000000CD47ECFE UE4Editor-Core.dll!UnknownFunction []
0x00000000C246D771 UE4Editor-Engine.dll!UnknownFunction []
0x00000000C2473292 UE4Editor-Engine.dll!UnknownFunction []
0x00000000C1CCC304 UE4Editor-Engine.dll!UnknownFunction []
0x00000000C1CD7829 UE4Editor-Engine.dll!UnknownFunction []
0x00000000C9FBD781 UE4Editor-UnrealEd.dll!UnknownFunction []
0x00000000CA859626 UE4Editor-UnrealEd.dll!UnknownFunction []
0x000000003FBA5EAC UE4Editor.exe!UnknownFunction []
0x000000003FBB6BD0 UE4Editor.exe!UnknownFunction []
0x000000003FBB6C4A UE4Editor.exe!UnknownFunction []
0x000000003FBC4177 UE4Editor.exe!UnknownFunction []
0x000000003FBC5B87 UE4Editor.exe!UnknownFunction []
0x000000007754652D kernel32.dll!UnknownFunction []
0x000000007767C541 ntdll.dll!UnknownFunction []
0x000000007767C541 ntdll.dll!UnknownFunction []

The problem seems lie in this function:

    if (PhysicsHandle->GrabbedComponent)
    {
        // move the object
        PhysicsHandle->SetTargetLocation(LineTraceEnd);
    }