Null Object Reference
Called from openfl._legacy.display.Stage.__pollTimers (openfl/_legacy/display/Stage.hx line 1084)
Called from openfl._legacy.display.Stage.__checkRender (openfl/_legacy/display/Stage.hx line 351)
Called from openfl._legacy.display.Stage.__render (openfl/_legacy/display/Stage.hx line 1103)
Called from openfl._legacy.display.DisplayObjectContainer.__broadcast (openfl/_legacy/display/DisplayObjectContainer.hx line 286)
Called from openfl._legacy.display.DisplayObject.__broadcast (openfl/_legacy/display/DisplayObject.hx line 161)
Called from openfl._legacy.display.DisplayObject.__dispatchEvent (openfl/_legacy/display/DisplayObject.hx line 182)
Called from openfl._legacy.events.EventDispatcher.dispatchEvent (openfl/_legacy/events/EventDispatcher.hx line 98)
Called from flixel.FlxGame.onEnterFrame (flixel/FlxGame.hx line 541)
Called from flixel.FlxGame.step (flixel/FlxGame.hx line 674)
Called from flixel.FlxGame.update (flixel/FlxGame.hx line 750)
Called from flixel.FlxState.tryUpdate (flixel/FlxState.hx line 178)
Called from flixel.FlxState.tryUpdate (flixel/FlxState.hx line 168)
Called from GameState.update (GameState.hx line 278)
Called from Bullets.update (Bullets.hx line 29)
Called from flixel.FlxG.overlap (flixel/FlxG.hx line 366)
Called from flixel.system.FlxQuadTree.execute (flixel/system/FlxQuadTree.hx line 593)
Called from flixel.system.FlxQuadTree.execute (flixel/system/FlxQuadTree.hx line 597)
Called from flixel.system.FlxQuadTree.execute (flixel/system/FlxQuadTree.hx line 597)
Called from flixel.system.FlxQuadTree.execute (flixel/system/FlxQuadTree.hx line 583)
Called from flixel.system.FlxQuadTree.overlapNode (flixel/system/FlxQuadTree.hx line 655)
Called from flixel.FlxObject.separate (flixel/FlxObject.hx line 81)
Called from flixel.FlxObject.separateX (flixel/FlxObject.hx line 184)
Called from flixel.tile.FlxTilemap.overlapsWithCallback (flixel/tile/FlxTilemap.hx line 539)
Called from flixel.FlxObject.separateX (flixel/FlxObject.hx line 187)
Called from flixel.FlxObject.computeOverlapX (flixel/FlxObject.hx line 110)