Game crashes when quit as a listen server

Development Programming & Scripting Multiplayer & Networking
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1

Hi all, as the title says, my code somehow crashes when exiting the game as a server.
Here is the code:

Error        LogWindows                === Critical error: ===
Error        LogWindows                Fatal error!
Error        LogWindows                Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000368
Error        LogWindows                [Callstack] 0x00007ffe4fb4831a UE4Editor-Grounders.dll!AGroundersPlayerState::GetIsGrounder() [D:\Unreal Source Projects\GroundersGame\Source\Grounders\Private\Player\GroundersPlayerState.cpp:31]
Error        LogWindows                [Callstack] 0x0000027cfead0800 UnknownFunction []
Error        LogWindows                [Callstack] 0x0000000000000001 UnknownFunction []
Error        LogWindows                [Callstack] 0x0000027c940d0c30 UnknownFunction []
Error        LogWindows                [Callstack] 0x0000027cfead0800 UnknownFunction []

Please ask for any more info, any help is appreciated.

2

well what is the line of code on GroundersPlayerState.cpp line 31?

3

Right now I have

bool AGroundersPlayerState::GetIsGrounder()
{
	AGroundersCharacter* Char = GetPawn<AGroundersCharacter>();
	if (Char)
	{
		return bIsGrounder;
	} else
	{
		return false;
	}
}

(Line 31 is AGroundersCharacter* Char = GetPawn<AGroundersCharacter>();, but assigning a variable without using it shouldn’t crash it, right? I do check before using)

But it almost doesn’t matter, I tried it with

int32 x = 15;
UE_LOG(LogTemp, Warning, TEXT("%i"), x);

and that doesn’t work either, the error line was int32 x = 15;

4

My guess is that the entire AGroundersPlayerState is null and the stack trace is lying. I would take a backup of the project, then remove all references to GetIsGrounder() and see what happens. Then I would re-add every reference 1 by 1 until it crashes again to see which specific call is the issue.

1 Like
5

Sure, I’ll try that and get back to you.

6

Probably something else is trying to access that PlayerState after the game has already invalidated it. I’d run it in debugger, and get a good call stack on it. Whatever is calling that shouldn’t be calling it if the game is terminating.

1 Like
7

I’ll try that as well, thanks

8

Found it. I’m calling it in LogOut on the gamemode. It’s understanable but I was under the impression that the player’s objects are destroyed after that code. Guess I’ll have to find something else to run that. (Super::LogOut is run at the end of my override btw)

9

I’ve changed the code so that if it is the server disconnecting (clients disconnecting works fine) it doesn’t run the code and instead disconnects all clients first. Many thanks

1 Like
10

Glad to hear