Crash in setUserLocationVerticalAlignment

[picciano]

Platform: iOS
Mapbox SDK version: ios-v3.2.2 (abe1695)

Steps to trigger behavior

1. Launch app with map
2. In viewWillAppear call [self.mapView setUserLocationVerticalAlignment:MGLAnnotationVerticalAlignmentCenter animated:NO];

Expected behavior

App does not crash.

Actual behavior

App occasionally crashes. I think an array of locations is being created at line 3899 and self.userLocation.location is nil.
[self locationManager:self.locationManager didUpdateLocations:@[self.userLocation.location] animated:animated];

Stack trace

Fatal Exception: NSInvalidArgumentException
0  CoreFoundation                 0x18385adb0 __exceptionPreprocess
1  libobjc.A.dylib                0x182ebff80 objc_exception_throw
2  CoreFoundation                 0x18373e1a0 -[__NSPlaceholderArray initWithObjects:count:]
3  CoreFoundation                 0x183749c48 +[NSArray arrayWithObjects:count:]
4  Mapbox                         0x100621560 -[MGLMapView setUserLocationVerticalAlignment:animated:]
5  TallyGo                        0x100188530 -[TGMainViewController viewWillAppear:] (TGMainViewController.m:194)
6  UIKit                          0x1889d1374 -[UIViewController _setViewAppearState:isAnimating:]
7  UIKit                          0x1889d10e8 -[UIViewController __viewWillAppear:]
8  UIKit                          0x188b6be5c -[UINavigationController _startCustomTransition:]
9  UIKit                          0x188a77e40 -[UINavigationController _startDeferredTransitionIfNeeded:]
10 UIKit                          0x188a77b1c -[UINavigationController __viewWillLayoutSubviews]
11 UIKit                          0x188a77a84 -[UILayoutContainerView layoutSubviews]
12 UIKit                          0x1889b41e4 -[UIView(CALayerDelegate) layoutSublayersOfLayer:]
13 QuartzCore                     0x186346994 -[CALayer layoutSublayers]
14 QuartzCore                     0x1863415d0 CA::Layer::layout_if_needed(CA::Transaction*)
15 QuartzCore                     0x186341490 CA::Layer::layout_and_display_if_needed(CA::Transaction*)
16 QuartzCore                     0x186340ac0 CA::Context::commit_transaction(CA::Transaction*)
17 QuartzCore                     0x186340820 CA::Transaction::commit()
18 QuartzCore                     0x186339de4 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*)
19 CoreFoundation                 0x183810728 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__
20 CoreFoundation                 0x18380e4cc __CFRunLoopDoObservers
21 CoreFoundation                 0x18380e8fc __CFRunLoopRun
22 CoreFoundation                 0x183738c50 CFRunLoopRunSpecific
23 GraphicsServices               0x185020088 GSEventRunModal
24 UIKit                          0x188a22088 UIApplicationMain
25 TallyGo                        0x1001876c4 main (main.m:14)
26 libdispatch.dylib              0x1832d68b8 (Missing)