What does this error (NSInvalidArgumentException) mean? - swift

Question

Got this error for a Tetris game that I'm making. Not really sure how to upload the Xcode project to GitHub as I get denied as I don't have access so sorry for no context. None of this error seems to actually make sense to me, its just a random collection of numbers and some recognisable phrases like 'SpriteKit' or 'UIKit'.
2017-05-15 10:09:10.942 Tetris[2258:77198] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Setting this node as parent would create a loop: <SKNode> name:'(null)' position:{6, -6} scale:{1.00, 1.00} accumulatedFrame:{{12, -412}, {200, 400}}'
*** First throw call stack:
(
0 CoreFoundation 0x000000010fa4dd4b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x000000010cacb21e objc_exception_throw + 48
2 CoreFoundation 0x000000010fab72b5 +[NSException raise:format:] + 197
3 SpriteKit 0x000000010cfe3134 -[SKNode(setParent) setParent:] + 87
4 SpriteKit 0x000000010cfdc376 -[SKNode insertChild:atIndex:] + 230
5 SpriteKit 0x000000010cfdc26f -[SKNode addChild:] + 68
6 Tetris 0x000000010c4bafe0 _TFC6Tetris9GameScenecfT4sizeVSC6CGSize_S0_ + 1376
7 Tetris 0x000000010c4bb080 _TFC6Tetris9GameSceneCfT4sizeVSC6CGSize_S0_ + 64
8 Tetris 0x000000010c4c23f2 _TFC6Tetris18GameViewController11viewDidLoadfT_T_ + 274
9 Tetris 0x000000010c4c3222 _TToFC6Tetris18GameViewController11viewDidLoadfT_T_ + 34
10 UIKit 0x000000010d368a3d -[UIViewController loadViewIfRequired] + 1258
11 UIKit 0x000000010d368e70 -[UIViewController view] + 27
12 UIKit 0x000000010d2324b5 -[UIWindow addRootViewControllerViewIfPossible] + 71
13 UIKit 0x000000010d232c06 -[UIWindow _setHidden:forced:] + 293
14 UIKit 0x000000010d246519 -[UIWindow makeKeyAndVisible] + 42
15 UIKit 0x000000010d1bef8d -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4818
16 UIKit 0x000000010d1c50ed -[UIApplication _runWithMainScene:transitionContext:completion:] + 1731
17 UIKit 0x000000010d1c226d -[UIApplication workspaceDidEndTransaction:] + 188
18 FrontBoardServices 0x0000000116a4b6cb __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
19 FrontBoardServices 0x0000000116a4b544 -[FBSSerialQueue _performNext] + 189
20 FrontBoardServices 0x0000000116a4b8cd -[FBSSerialQueue _performNextFromRunLoopSource] + 45
21 CoreFoundation 0x000000010f9f2761 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
22 CoreFoundation 0x000000010f9d798c __CFRunLoopDoSources0 + 556
23 CoreFoundation 0x000000010f9d6e76 __CFRunLoopRun + 918
24 CoreFoundation 0x000000010f9d6884 CFRunLoopRunSpecific + 420
25 UIKit 0x000000010d1c0aea -[UIApplication _run] + 434
26 UIKit 0x000000010d1c6c68 UIApplicationMain + 159
27 Tetris 0x000000010c4c858f main + 111
28 libdyld.dylib 0x00000001109fd68d start + 1
29 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

Answer 1

Adapted from the Official Documentation, NSInvalidArgumentException is:
Name of an exception that occurs when you pass an invalid argument to
a method, such as a nil pointer where a non-nil object is required.
It should also has a reason of why it occurred.
Referring to your case the reason is:
Setting this node as parent would create a loop:
name:'(null)' position:{6, -6} scale:{1.00, 1.00}
accumulatedFrame:{{12, -412}, {200, 400}}
Trying to debug the crashed scene, the reason should be clear enough for detecting what is the reason of causing the crash.