IssueTracker

Hi,

We are also experiencing this crash using Google Maps SDK 3.8.0 for iOS. We recently released a BETA version of our app with TestFlight and users are reporting severe crashes happening since when we included the map in the main view controller of our app. We identified the crash issue with Firebase and by performing a quick search of the problem it appears we are not the only one experiencing it: We are using Objective-C in our app, and while I cannot share the full code of the view controller due to company policies, this is how we are creating the map in our code:

_mapView = [GMSMapView new];
_mapView.delegate = self;
_mapView.myLocationEnabled = NO;
_mapView.mapType = kGMSTypeNormal;
_mapView.settings.scrollGestures = NO;
_mapView.settings.zoomGestures = NO;
_mapView.settings.tiltGestures = NO;
_mapView.settings.rotateGestures = NO;
_mapView.settings.compassButton = NO;
_mapView.settings.myLocationButton = NO;
_mapView.translatesAutoresizingMaskIntoConstraints = NO;

The GMSMapView is the attached to the UIViewController view using Autolayout constraints. We are also performing any sort of resources cleanup, like removing the map when the view controller view is not visibile anymore (viewWillDisappear:) and when the application resign active. Everything is configured inside the viewWillAppear:. We also were not able to reproduce the issue on our end, although our BETA testers are reporting the crashes to happen quite frequently. This is the stacktrace of the crash logged on Firebase:

Crashed: com.apple.main-thread
0  appname                        0x1016b697c gmscore::renderer::GLState::Flush() + 17080
1  appname                        0x1016c1ce4 gmscore::renderer::GLScopedContext::~GLScopedContext() + 31628
2  appname                        0x101724c10 -[GMSEntityRendererView setFrame:] + 436920
3  appname                        0x10176d500 -[GMSVectorMapView setFrame:] + 185672
4  UIKitCore                      0x18ac19168 -[UIView(Geometry) _applyAutoresizingMaskWithOldSuperviewSize:] + 600
5  UIKitCore                      0x18ac19e28 -[UIView(Geometry) _resizeWithOldSuperviewSize:] + 240
6  CoreFoundation                 0x1865f04e0 __NSARRAY_IS_CALLING_OUT_TO_A_BLOCK__ + 24
7  CoreFoundation                 0x1864ee084 -[__NSArrayM enumerateObjectsWithOptions:usingBlock:] + 432
8  UIKitCore                      0x18ac18ebc -[UIView(Geometry) resizeSubviewsWithOldSize:] + 172
9  UIKitCore                      0x18ac1a158 -[UIView(Geometry) setBounds:] + 704
10 UIKitCore                      0x18ac19a00 -[UIView(Geometry) _applyISEngineLayoutValuesToBoundsOnly:] + 532
11 UIKitCore                      0x18ac19dc4 -[UIView(Geometry) _resizeWithOldSuperviewSize:] + 140
12 CoreFoundation                 0x1865f04e0 __NSARRAY_IS_CALLING_OUT_TO_A_BLOCK__ + 24
13 CoreFoundation                 0x1864ee084 -[__NSArrayM enumerateObjectsWithOptions:usingBlock:] + 432
14 UIKitCore                      0x18ac18ebc -[UIView(Geometry) resizeSubviewsWithOldSize:] + 172
15 UIKitCore                      0x18ab5b580 -[UIView(AdditionalLayoutSupport) _is_layout] + 152
16 UIKitCore                      0x18ac20ce8 -[UIView(Hierarchy) _updateConstraintsAsNecessaryAndApplyLayoutFromEngine] + 1056
17 UIKitCore                      0x18ac346a0 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2168
18 QuartzCore                     0x18d2874a0 -[CALayer layoutSublayers] + 292
19 QuartzCore                     0x18d2878e0 CA::Layer::layout_if_needed(CA::Transaction*) + 472
20 QuartzCore                     0x18d299dc4 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 144
21 QuartzCore                     0x18d1de884 CA::Context::commit_transaction(CA::Transaction*, double) + 304
22 QuartzCore                     0x18d2093d0 CA::Transaction::commit() + 656
23 UIKitCore                      0x18a760d80 _UIApplicationFlushRunLoopCATransactionIfTooLate + 116
24 UIKitCore                      0x18a806d0c __handleEventQueueInternal + 6120
25 UIKitCore                      0x18a7fec88 __handleHIDEventFetcherDrain + 144
26 CoreFoundation                 0x186599860 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28
27 CoreFoundation                 0x1865997b4 __CFRunLoopDoSource0 + 84
28 CoreFoundation                 0x186598f68 __CFRunLoopDoSources0 + 296
29 CoreFoundation                 0x186593ca4 __CFRunLoopRun + 796
30 CoreFoundation                 0x186593660 CFRunLoopRunSpecific + 480
31 GraphicsServices               0x1909a4604 GSEventRunModal + 164
32 UIKitCore                      0x18a76815c UIApplicationMain + 1944
33 appname                        0x100a8019c main + 16 (main.m:16)
34 libdyld.dylib                  0x18640f1ec start + 4

Also, while firebase reports the crashes to happen then the app is in Foreground, our BETA testers are reporting the crashes to happen while the app is in background (or woken up from background), which is quite odd since are removing the map from the viewport when the app goes in background mode:

[self.mapView removeFromSuperview];
[self.mapView clear];
self.mapView = nil;

I'm also attaching a screenshot of the crash count reported on Firebase to give you a general idea of the impact of the crashes in our app. I'll be happy to provide more data to help you address this issue.

We downgraded to version 3.7.0 and the issue seems to be gone (even though in the release notes of version 3.8.0 it's mentioned no changes)