App crashes from app store, but not in development version - swift

Question

This is a question/answer. I found my issue which i will explain here hopefully for others to learn from as well, but i also have some questions regarding why.
I implemented IAP in my app and tested all of them in sandbox mode and everything worked as planned with no crashes anywhere. I eventually uploaded my app to the app store and after approval, i removed the development version from my device and installed the app store version. At which point, when i tried to go to my menu to test my Remove Ads IAP in production, the app crashes when loading the VC.
So i looked at my devices logs in Xcode...
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x0000000100054a34
Termination Signal: Trace/BPT trap: 5
Termination Reason: Namespace SIGNAL, Code 0x5
Terminating Process: exc handler [0]
Triggered by Thread: 0
Filtered syslog:
None found
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 Connectify 0x0000000100054a34 specialized SettingsTableViewController.(viewDidLoad() -> ()).(closure #1) (SettingsTableViewController.swift:40)
1 Connectify 0x0000000100054e00 partial apply for SettingsTableViewController.(viewDidLoad() -> ()).(closure #1) (SettingsTableViewController.swift:0)
2 Connectify 0x00000001000283d0 thunk (IAPHelper.swift:0)
3 Connectify 0x000000010002b990 specialized IAPHelper.productsRequest(SKProductsRequest, didReceive : SKProductsResponse) -> () (IAPHelper.swift:0)
4 Connectify 0x0000000100028738 #objc IAPHelper.productsRequest(SKProductsRequest, didReceive : SKProductsResponse) -> () (IAPHelper.swift:0)
5 StoreKit 0x000000019ae39dbc __34-[SKProductsRequest _handleReply:]_block_invoke + 512
6 libdispatch.dylib 0x000000018d229200 _dispatch_call_block_and_release + 24
7 libdispatch.dylib 0x000000018d2291c0 _dispatch_client_callout + 16
8 libdispatch.dylib 0x000000018d22dd6c _dispatch_main_queue_callback_4CF + 1000
9 CoreFoundation 0x000000018e34bf2c __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
10 CoreFoundation 0x000000018e349b18 __CFRunLoopRun + 1660
11 CoreFoundation 0x000000018e278048 CFRunLoopRunSpecific + 444
12 GraphicsServices 0x000000018fcfe198 GSEventRunModal + 180
13 UIKit 0x00000001942642fc -[UIApplication _run] + 684
14 UIKit 0x000000019425f034 UIApplicationMain + 208
15 Connectify 0x0000000100021248 main (AppDelegate.swift:16)
16 libdyld.dylib 0x000000018d25c5b8 start + 4
Which lead me to believe it has to do with IAP's. This code is in viewDidLoad of my SettingsTableViewController.
products = []
Products.store.requestProducts{success, products in
if success {
self.products = products!
for i in 0...products!.count - 1{
print("Index \(i): \(products![i].productIdentifier)")
}
if !IAPHelper.canMakePayments() || Products.store.isProductPurchased(Products.RemoveAds){
self.cell1.textLabel?.textColor = UIColor.gray
self.cell1.isUserInteractionEnabled = false
self.cell1.accessoryType = .none
self.cell2.textLabel?.textColor = UIColor.gray
self.cell2.isUserInteractionEnabled = false
self.cell2.accessoryType = .none
}
}else{
print("Not success")
}
}
But i can't decipher enough of the crash log to determine what the issue is, only that it probably has to do with this block of code.
The revalation
So, at a loss, i had my wife download the app from the store and test for this crash. It did not! No crash at all. It was at this point I thought to try removing my device from the Dev Portal. And of course, that fixed it.
Conclusion/Questions
If you're using IAP's, which work in debug build testing, but not in production release on the same device. Disable your device in the Dev Portal and re-install from the store.
1) How is Apple deciding when the IAP should be sandboxed? Is it certificate based? Is it if the device ID is registered as a development device?
2) Why would this IAP code work in a debug build on my development device, but not with a release build? (Until i disabled the device in the DevPortal)
3) What information can be gathered from the crash log that would pin point this issue more accurately?
UPDATE
After reading more into EXC_BREAKPOINT (SIGTRAP) when it comes to Swift, i think it it's most likely related to an index out of bounds exception in the Products array. Specifically, as the crash report says, this line...
for i in 0...products!.count - 1{
But why would products be nil just because the development device is requesting IAPs from the production server?