[1.0.1964] Exception

[Eterm]

I had this error pop-up while playing but it didn't fully crash the game:

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Exception in JobDriver tick for pawn Maker driver=JobDriver_ConstructFinishFrame (toilIndex=1) driver.job=(FinishFrame (Job_37126) A=Thing_Frame_Wall41653) lastJobGiver=RimWorld.JobGiver_Work
System.NullReferenceException: Object reference not set to an instance of an object
  at Verse.AI.JobDriver.TryActuallyStartNextToil () [0x00053] in C:\Dev\RimWorld\Assets\Scripts\Verse\AI\JobDrivers\JobDriver.cs:397
  at Verse.AI.JobDriver.ReadyForNextToil () [0x00009] in C:\Dev\RimWorld\Assets\Scripts\Verse\AI\JobDrivers\JobDriver.cs:363
  at RimWorld.JobDriver_ConstructFinishFrame+<MakeNewToils>c__Iterator0+<MakeNewToils>c__AnonStorey1.<>m__1 () [0x0012b] in C:\Dev\RimWorld\Assets\Scripts\RimWorld\AI\JobDrivers\Construct\JobDriver_ConstructFinishFrame.cs:74
  at Verse.AI.JobDriver.DriverTick () [0x001e2] in C:\Dev\RimWorld\Assets\Scripts\Verse\AI\JobDrivers\JobDriver.cs:344
UnityEngine.DebugLogHandler:Internal_Log(LogType, String, Object)
UnityEngine.DebugLogHandler:LogFormat(LogType, Object, String, Object[])
UnityEngine.Logger:Log(LogType, Object)
UnityEngine.Debug:LogError(Object)
Verse.Log:Error(String, Boolean) (at C:\Dev\RimWorld\Assets\Scripts\Verse\Utility\Debug\Log\Log.cs:68)
Verse.AI.JobUtility:TryStartErrorRecoverJob(Pawn, String, Exception, JobDriver) (at C:\Dev\RimWorld\Assets\Scripts\Verse\AI\JobUtility.cs:22)
Verse.AI.JobDriver:DriverTick() (at C:\Dev\RimWorld\Assets\Scripts\Verse\AI\JobDrivers\JobDriver.cs:350)
Verse.AI.Pawn_JobTracker:JobTrackerTick() (at C:\Dev\RimWorld\Assets\Scripts\Verse\AI\Pawn_JobTracker.cs:131)
Verse.Pawn:Tick() (at C:\Dev\RimWorld\Assets\Scripts\Verse\Pawn\Pawn.cs:556)
Verse.TickList:Tick() (at C:\Dev\RimWorld\Assets\Scripts\Verse\Game\Ticking\TickList.cs:125)
Verse.TickManager:DoSingleTick() (at C:\Dev\RimWorld\Assets\Scripts\Verse\Game\Ticking\TickManager.cs:297)
Verse.TickManager:TickManagerUpdate() (at C:\Dev\RimWorld\Assets\Scripts\Verse\Game\Ticking\TickManager.cs:261)
Verse.Game:UpdatePlay() (at C:\Dev\RimWorld\Assets\Scripts\Verse\Game\Game.cs:505)
Verse.Root_Play:Update() (at C:\Dev\RimWorld\Assets\Scripts\Verse\Global\Root\Root_Play.cs:99)