How to catch exception in Realm on Delete - ios

Question

I am getting an exception when I filter and try to delete records from Realm DB. It appears that the records are being deleted. The do / catch however is not responding as I expected. What am I doing wrong?
func deleteRecords (module: String, version:String, workorder: String) {
let realm = try! Realm()
let predicate = NSPredicate(format: "module = %# && version = %# && workorder = %#" , module, version, workorder)
let results = realm.objects(NewRecord.self).filter(predicate)
print("FILTERED: \(results.count) \(results)")
do {
try? realm.write {
for result in results {
print("DELETING: \(result)")
realm.delete(result)
}
}
} catch {
// Catch anything that the above catches didn't catch
print("ERROR THROWN DELETONG")
}
}
The output looks like so:
FILTERED: 2 Results<NewRecord> <0x7f9cb1d27950> (
[0] NewRecord {
id = eaAerator008quantityWRK-000001;
module = eaAerator;
workorder = WRK-000001;
version = 008;
field = quantity;
measure = None;
valueString = 200;
valueData = < — 0 total bytes>;
diStatus = INSTALLED;
},
[1] NewRecord {
id = eaAerator008installedQuantityWRK-000001;
module = eaAerator;
workorder = WRK-000001;
version = 008;
field = installedQuantity;
measure = None;
valueString = 150;
valueData = < — 0 total bytes>;
diStatus = INSTALLED;
}
)
DELETING: NewRecord {
id = eaAerator008quantityWRK-000001;
module = eaAerator;
workorder = WRK-000001;
version = 008;
field = quantity;
measure = None;
valueString = 200;
valueData = < — 0 total bytes>;
diStatus = INSTALLED;
}
DELETING: NewRecord {
id = eaAerator008installedQuantityWRK-000001;
module = eaAerator;
workorder = WRK-000001;
version = 008;
field = installedQuantity;
measure = None;
valueString = 150;
valueData = < — 0 total bytes>;
diStatus = INSTALLED;
}
2017-08-13 23:05:07.982 DSMTracker[925:147376108] *** Terminating app due to uncaught exception 'RLMException', reason: 'Object has been deleted or invalidated.'
*** First throw call stack:
(
0 CoreFoundation 0x0000000107bbab0b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x0000000106d03141 objc_exception_throw + 48
2 Realm 0x00000001055eccf3 _ZL17RLMVerifyAttachedP13RLMObjectBase + 83
3 Realm 0x00000001055ee94c _ZN12_GLOBAL__N_18getBoxedIN5realm10StringDataEEEP11objc_objectP13RLMObjectBasem + 28
4 Realm 0x00000001055ee927 ___ZN12_GLOBAL__N_115makeBoxedGetterIN5realm10StringDataEEEP11objc_objectm_block_invoke + 39
5 DSMTracker 0x00000001044bdfb9 _TFC10DSMTracker23DirectInstallController9tableViewfTCSo11UITableView6commitOSC27UITableViewCellEditingStyle8forRowAtV10Foundation9IndexPath_T_ + 841
6 DSMTracker 0x00000001044be0af _TToFC10DSMTracker23DirectInstallController9tableViewfTCSo11UITableView6commitOSC27UITableViewCellEditingStyle8forRowAtV10Foundation9IndexPath_T_ + 95
7 UIKit 0x000000010942ec8c -[UITableView _animateDeletionOfRowWithCell:] + 172
8 UIKit 0x0000000109404289 __52-[UITableView _swipeActionButtonsForRowAtIndexPath:]_block_invoke + 84
9 UIKit 0x0000000109430334 -[UITableView _actionButton:pushedInCell:] + 212
10 UIKit 0x0000000109690d75 -[UITableViewCell _actionButtonPushed:] + 82
11 UIKit 0x00000001092c1d22 -[UIApplication sendAction:to:from:forEvent:] + 83
12 UIKit 0x000000010944625c -[UIControl sendAction:to:forEvent:] + 67
13 UIKit 0x0000000109446577 -[UIControl _sendActionsForEvents:withEvent:] + 450
14 UIKit 0x00000001094454b2 -[UIControl touchesEnded:withEvent:] + 618
15 UIKit 0x00000001097eaea9 _UIGestureEnvironmentSortAndSendDelayedTouches + 5553
16 UIKit 0x00000001097e5ec0 _UIGestureEnvironmentUpdate + 1409
17 UIKit 0x00000001097e58f3 -[UIGestureEnvironment _deliverEvent:toGestureRecognizers:usingBlock:] + 484
18 UIKit 0x00000001097e4aba -[UIGestureEnvironment _updateGesturesForEvent:window:] + 274
19 UIKit 0x0000000109330b9a -[UIWindow sendEvent:] + 4092
20 UIKit 0x00000001092dd7b0 -[UIApplication sendEvent:] + 352
21 UIKit 0x0000000109ac0adc __dispatchPreprocessedEventFromEventQueue + 2926
22 UIKit 0x0000000109ab8a3a __handleEventQueue + 1122
23 CoreFoundation 0x0000000107b60c01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
24 CoreFoundation 0x0000000107b460cf __CFRunLoopDoSources0 + 527
25 CoreFoundation 0x0000000107b455ff __CFRunLoopRun + 911
26 CoreFoundation 0x0000000107b45016 CFRunLoopRunSpecific + 406
27 GraphicsServices 0x0000000110337a24 GSEventRunModal + 62
28 UIKit 0x00000001092c00d4 UIApplicationMain + 159
29 DSMTracker 0x00000001048cad27 main + 55
30 libdyld.dylib 0x000000010ca6d65d start + 1
31 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException