PlayerResourcesComponent nullptr exception

[jacopomaroli]

Describe the bug
PlayerResourcesComponent member is set in the constructor of the ARTSPlayerController and gets dereferenced before hitting void ARTSPlayerController::BeginPlay() in file
TrumpDefense2020\TD2020\Plugins\RealTimeStrategy\Source\RealTimeStrategy\Private\RTSPlayerController.cpp

To Reproduce
Steps to reproduce the behavior:

1. compile project
2. run in viewport
3. observe crash

Expected behavior
It shouldn't crash

Screenshots
N/A

Desktop (please complete the following information):

• OS: Windows 10
• Browser: not relevant
• Version: Unreal Engine 4.21.2 / ue4-rts git hash fdcb8ae4b3810b5a9c4dbae00084404815845797 (latest version available for ue 4.21.2) https://github.com/npruehs/ue4-rts/tree/fdcb8ae4b3810b5a9c4dbae00084404815845797

Additional context
When you run the project from visual studio and hit the run in viewport preview mode in UE UI, you can set a breakpoint in the ARTSPlayerController constructor.
This allows you to set another breakpoint when PlayerResourcesComponent variable changes (Debug-> New Breakpoint -> Data Breakpoint...: 4 bytes)
This leads to a breakpoint in vcruntime140.dll!memcpy() Line 244 and if you download the debug symbols you'll find the code where it breaks is this

MoveSmall8::
        mov     rcx, qword ptr [rdx]    ; get eight bytes from source
        mov     [rax], rcx              ; write eight bytes to destination
        ret <--

with the following callstack

>	vcruntime140.dll!memcpy() Line 244	Unknown
 	UE4Editor-Engine.dll!00007ffdf52c0913()	Unknown
 	UE4Editor-Engine.dll!00007ffdf52c0a9a()	Unknown
 	UE4Editor-CoreUObject.dll!00007ffdf8dea65c()	Unknown
 	UE4Editor-CoreUObject.dll!00007ffdf8df3518()	Unknown
 	UE4Editor-CoreUObject.dll!00007ffdf8dbf36f()	Unknown
 	UE4Editor-CoreUObject.dll!00007ffdf8e09887()	Unknown
 	UE4Editor-Engine.dll!00007ffdf5942726()	Unknown
 	UE4Editor-Engine.dll!00007ffdf5943067()	Unknown
 	UE4Editor-Engine.dll!00007ffdf56fa173()	Unknown
 	UE4Editor-Engine.dll!00007ffdf56f9f9a()	Unknown
 	UE4Editor-Engine.dll!00007ffdf56e39aa()	Unknown
 	UE4Editor-Engine.dll!00007ffdf5944325()	Unknown
 	UE4Editor-Engine.dll!00007ffdf5943c8c()	Unknown
 	UE4Editor-Engine.dll!00007ffdf56fc0c5()	Unknown
 	UE4Editor-UnrealEd.dll!00007ffdf377ac89()	Unknown
 	UE4Editor-UnrealEd.dll!00007ffdf379b350()	Unknown
 	UE4Editor-UnrealEd.dll!00007ffdf37b92e6()	Unknown
 	UE4Editor-UnrealEd.dll!00007ffdf31b1891()	Unknown
 	UE4Editor-UnrealEd.dll!00007ffdf3ad2346()	Unknown
 	UE4Editor.exe!00007ff7966c6225()	Unknown
 	UE4Editor.exe!00007ff7966d596c()	Unknown
 	UE4Editor.exe!00007ff7966e48aa()	Unknown
 	UE4Editor.exe!00007ff7966e659a()	Unknown
 	kernel32.dll!00007ffe4c697bd4()	Unknown
 	ntdll.dll!00007ffe4d7ace51()	Unknown

this issue could be entirely due to ue4-rts but I thought checking with you first as it seems rather easy to incour into and it seems weird no one experienced it before.

I think it could be due to the fact that PlayerResourcesComponent gets garbage collected by UE as it's not used but that's just a wild guess based on what I read from other similar issues

TBH while compiling this issue I realized this specific commit was fiddling with something around resources so that could be the culprit... npruehs/ue4-rts@fdcb8ae
Anyhow it would be great knowing what's the hash of ue4-rts which is needed to make the project work

P.S. awesome project BTW, very inspiring. Keep it up!

[JernejHabjan]

Hey @jacopomaroli sorry for late response. Keep checking this project as I'm currently updating RTS dependency of https://github.com/npruehs/ue4-rts/
as a plugin.
After latest version of this plugin is linked in project, errors like this should be gone.
Have a good one ☺️