Blob crash

(lldb) bt
CouchbaseLiteSwift was compiled with optimization - stepping may behave oddly; variables may not be available.
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
    frame #0: 0x0000000114575b6e libsystem_kernel.dylib`__pthread_kill + 10
    frame #1: 0x00000001145af080 libsystem_pthread.dylib`pthread_kill + 333
    frame #2: 0x00000001141d0c97 libsystem_c.dylib`abort + 127
    frame #3: 0x000000011283dfe5 libswiftCore.dylib`swift::fatalError(unsigned int, char const*, ...) + 149
    frame #4: 0x000000011287253b libswiftCore.dylib`-[SwiftObject doesNotRecognizeSelector:] + 91
    frame #5: 0x0000000113819898 CoreFoundation`___forwarding___ + 1432
    frame #6: 0x0000000113819278 CoreFoundation`__forwarding_prep_0___ + 120
  * frame #7: 0x000000010e918144 CouchbaseLiteSwift`::__32-[CBLMutableDictionary setData:]_block_invoke(.block_descriptor=<unavailable>, key=<unavailable>, value=<unavailable>, stop=<unavailable>) at CBLMutableDictionary.mm:164 [opt]
    frame #8: 0x00000001127ceb01 libswiftCore.dylib`function signature specialization <Arg[0] = Dead, Arg[1] = Owned To Guaranteed> of Swift._SwiftDeferredNSDictionary.enumerateKeysAndObjects(options: Swift.Int, using: @convention(block) (Swift.Unmanaged<Swift.AnyObject>, Swift.Unmanaged<Swift.AnyObject>, Swift.UnsafeMutablePointer<Swift.UInt8>) -> ()) -> () + 289
    frame #9: 0x0000000112631bc1 libswiftCore.dylib`Swift._SwiftDeferredNSDictionary.enumerateKeysAndObjects(options: Swift.Int, using: @convention(block) (Swift.Unmanaged<Swift.AnyObject>, Swift.Unmanaged<Swift.AnyObject>, Swift.UnsafeMutablePointer<Swift.UInt8>) -> ()) -> () + 17
    frame #10: 0x000000011263217b libswiftCore.dylib`@objc Swift._SwiftDeferredNSDictionary.enumerateKeysAndObjects(options: Swift.Int, using: @convention(block) (Swift.Unmanaged<Swift.AnyObject>, Swift.Unmanaged<Swift.AnyObject>, Swift.UnsafeMutablePointer<Swift.UInt8>) -> ()) -> () + 43
    frame #11: 0x000000010e917f76 CouchbaseLiteSwift`::-[CBLMutableDictionary setData:](self=0x000060c0001076b0, _cmd=<unavailable>, data=<unavailable>) at CBLMutableDictionary.mm:162 [opt]
    frame #12: 0x000000010e9173df CouchbaseLiteSwift`::-[CBLMutableDictionary initWithData:](self=<unavailable>, _cmd=<unavailable>, data=<unavailable>) at CBLMutableDictionary.mm:52 [opt]
    frame #13: 0x000000010e8f8c99 CouchbaseLiteSwift`::-[NSDictionary(self=<unavailable>, _cmd=<unavailable>) cbl_toCBLObject]() at CBLData.mm:58 [opt]
    frame #14: 0x000000010e8f3bb3 CouchbaseLiteSwift`::-[CBLMutableArray setData:](self=<unavailable>, _cmd=<unavailable>, data=<unavailable>) at CBLMutableArray.mm:283 [opt]
    frame #15: 0x000000010e8d2655 CouchbaseLiteSwift`MutableArrayObject.setData(data=1 value, self=<unavailable>) at MutableArrayObject.swift:550
    frame #16: 0x000000010e8d2559 CouchbaseLiteSwift`MutableArrayObject.init(data=1 value) at MutableArrayObject.swift:140
    frame #17: 0x000000010e8d24f2 CouchbaseLiteSwift`MutableArrayObject.__allocating_init(data:) at MutableArrayObject.swift:0
    frame #18: 0x000000010e4dbeb3 CBLP2PAdvertiser`ListPresenter.setRecord(record=some, handler=0x000000010e4ed8b0 CBLP2PAdvertiser`partial apply forwarder for closure #1 (Swift.Optional<Swift.Error>) -> () in CBLP2PAdvertiser.ListTableViewController.onDoneTapped(__ObjC.UIBarButtonItem) -> () at ListTableViewController.swift, self=0x00006040002782c0) at ListPresenter.swift:185
    frame #19: 0x000000010e4ed138 CBLP2PAdvertiser`ListTableViewController.onDoneTapped(sender=0x00007fb473c0da30, self=0x00007fb473c21ab0) at ListTableViewController.swift:65
    frame #20: 0x000000010e4ed8fc CBLP2PAdvertiser`@objc ListTableViewController.onDoneTapped(_:) at ListTableViewController.swift:0
    frame #21: 0x00000001103cf448 UIKit`-[UIApplication sendAction:to:from:forEvent:] + 83
    frame #22: 0x0000000110dd40d9 UIKit`__45-[_UIButtonBarTargetAction _invoke:forEvent:]_block_invoke + 154
    frame #23: 0x0000000110dd4012 UIKit`-[_UIButtonBarTargetAction _invoke:forEvent:] + 154
    frame #24: 0x00000001103cf448 UIKit`-[UIApplication sendAction:to:from:forEvent:] + 83
    frame #25: 0x000000011054a804 UIKit`-[UIControl sendAction:to:forEvent:] + 67
    frame #26: 0x000000011054ab21 UIKit`-[UIControl _sendActionsForEvents:withEvent:] + 450
    frame #27: 0x0000000110549a69 UIKit`-[UIControl touchesEnded:withEvent:] + 580
    frame #28: 0x000000011044411f UIKit`-[UIWindow _sendTouchesForEvent:] + 2729
    frame #29: 0x0000000110445821 UIKit`-[UIWindow sendEvent:] + 4086
    frame #30: 0x00000001103e9370 UIKit`-[UIApplication sendEvent:] + 352
    frame #31: 0x0000000110d2a57f UIKit`__dispatchPreprocessedEventFromEventQueue + 2796
    frame #32: 0x0000000110d2d194 UIKit`__handleEventQueueInternal + 5949
    frame #33: 0x0000000113839bb1 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    frame #34: 0x000000011381e4af CoreFoundation`__CFRunLoopDoSources0 + 271
    frame #35: 0x000000011381da6f CoreFoundation`__CFRunLoopRun + 1263
    frame #36: 0x000000011381d30b CoreFoundation`CFRunLoopRunSpecific + 635
    frame #37: 0x0000000116027a73 GraphicsServices`GSEventRunModal + 62
    frame #38: 0x00000001103ce0b7 UIKit`UIApplicationMain + 159
    frame #39: 0x000000010e50ba87 CBLP2PAdvertiser`main at AppDelegate.swift:12
    frame #40: 0x00000001140fe955 libdyld.dylib`start + 1
(lldb)