MAJOR - Enable Trigger crashes UE

General Issues and Bug Reporting
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1

I noticed that if (set some_trigger_device.Enable()){} does not throw any errors but crashes UE when building the verse script. The project will continue to crash every time you open it up until I remove this line.

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This is the correct code by the way
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2

Hi @FinestCreative would you mind trying to repro this crash once again and send us UEFN logs? Thanks a bunch!

3

Note that

if (TriggersOut[WinningVoteIndex].Enable()) {}

should work - I’m guessing the issue is the use of set. EDIT: Nevermind - it has no_rollback effect. Are you able to share the definition of TriggersOut? I’m guessing it’s something like []trigger_device. I’m having trouble producing a reduced example that causes a crash.

4

TriggersOut is indeed of type []trigger_device. While I was working on another project I pasted in this bugged line and it crashed like I reported. Here is the verse


using { /Fortnite.com/Devices }
using { /Verse.org/Simulation }
using { /EpicGames.com/Temporary/Diagnostics }

event_handler := class:
    Index:int
    Main:main
    HandlerRoundStart():void=
        Main.RoundStart(Index)

# A Verse-authored creative device that can be placed in a level
main := class(creative_device):

    @editable var TriggersOut:[]trigger_device = array{}
    # Only enabled in round 1
    @editable Rounds:[]round_settings_device = array{}
    
    OnBegin<override>()<suspends>:void=
        Print("Hello, world!")
        if (set TriggersOut[0].Enable()){}

    # Everything that subscribes goes here
    SubscribeAll()<suspends>:void=
        
        Self.GetPlayspace().PlayerAddedEvent().Subscribe(OnPlayerAdded)
        Self.GetPlayspace().PlayerRemovedEvent().Subscribe(OnPlayerRemoved)
        for(X -> CurrentRound:Rounds){
            Handler := event_handler{Index := X,Main := Self}
            CurrentRound.RoundBeginEvent.Subscribe(Handler.HandlerRoundStart)
        }
        

    # Handle player joining the island
    OnPlayerAdded(Agent:agent):void=
        {}
    
    # Handle player joining the island
    OnPlayerRemoved(Agent:agent):void={}

    RoundStart(RoundNumber:int):void={}
6

Done

7

Thank you! Used this to successfully reproduce.

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