Question Game Crashes on Android when activating TextMeshProUGUI

Code (CSharp):

1. Debug.Log("1");
2.         string opponentCardValue = packet.ReadInt().ToString();
3.         //this object contains a Image component and a TextMeshProUGUI as child, crashes when activated
4.         UIManager.uiManager.PlayerCard.SetActive(true);
5.  
6.         yield return new WaitForEndOfFrame();

Code (CSharp):

1. Error Unity Graphics device is null.
2. Error Unity TMPro.TextMeshProUGUI:Awake()
3. Error Unity <OpponentGuessedDefeat>d__27:MoveNext()
4. Error Unity UnityEngine.SetupCoroutine:InvokeMoveNext(IEnumerator, IntPtr)
5. Error Unity HomeToGame:HandleData(Byte[])
6. Error Unity HomeToGame:DataReceived(Object, DataReceivedEventArgs)
7. Error Unity SuperSimpleTcp.<<DataReceiver>b__72_0>d:MoveNext()
8. Error Unity System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1:Start(TStateMachine&)
9. Error Unity SuperSimpleTcp.SimpleTcpClient:<DataReceiver>b__72_0(Task`1)
10. Error Unity System.Threading.Tasks.ContinuationResultTaskFromResultTask`2:InnerInvoke()
11. Error Unity System.Threading.Tasks.Task:Execute()
12. Error Unity System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean)
13. Error Unity System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean)
14. Error Unity System.Threading.Tasks.Task:ExecuteWithThreadLocal(Task&)
15. Error Unity System.Threading.Tasks.Task:ExecuteEntry(Boolean)
16. Error Unity System.Threading.ThreadPoolWorkQueue:Dispatch()
17. Error Unity
18. Error Unity [ line -1286672140]
19. Error Unity
20. 0001-01-01 00:00:00.000 -1 -1 Info  --------- beginning of crash
21. Fatal libc Fatal signal 5 (SIGTRAP), code -6 (SI_TKILL) in tid 11767 (IL2CPP Threadpo), pid 11618 (ompany.Guessed)
22.  

 

Please move it thanks you for help

 

The error message is cryptic, but I believe there is reason behind that. It is a wild guessing, but it may still help someone

1. You start your SuperSimpleTcp. It actually spawns a new thread under the hood for the new connection
2. You call Log method from that thread. This is okay - so far.
3. You have a custom log handler that attempts to "print" the just written log in form of TMPro prefab. This is not allowed (we are not in the player thread now!) and crashes.

It may be even 2 and 3 connected -> you are attempting to create TMPro prefab outside of player thread.

Surprisingly there is no crash in-editor for the same scenario.

The solution would be to output TMPro prefab in main thread (for example log handler might enqueue things to write on main thread)

 

Hello @VINNUSAURUS and @MelvMay

I am facing the same issue. Did you manage to solve this?