Crash AGSMapViewBase ags_mapHasDrawn

[marius]

Hi,

Do you have any ideas what could cause a crash in [AGSMapViewBase ags_mapHasDrawn]? Are there any assumptions that I'm ignoring (e.g. always running on main thread, etc)? It happens pretty often, on iOS 8.2/8.3, but not on iOS 9.

Thank you,

Marius

Thread : Crashed: com.apple.main-thread

0  libobjc.A.dylib                0x1957a3bd0 objc_msgSend + 16

1  CoreFoundation                 0x1840162c4 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 20

2  CoreFoundation                 0x183f53450 _CFXNotificationPost + 2060

3  Tablet CMD                     0x1003a527c -[AGSMapViewBase ags_mapHasDrawn] + 1382348

4  Tablet CMD                     0x1002ced48 -[AGSMapRenderer drawRequested] + 504472

5  Tablet CMD                     0x1002ce718 -[AGSMapRenderer pulse:] + 502888

6  QuartzCore                     0x18844629c CA::Display::DisplayLinkItem::dispatch() + 32

7  QuartzCore                     0x188446134 CA::Display::DisplayLink::dispatch_items(unsigned long long, unsigned long long, unsigned long long) + 324

8  IOKit                          0x185221470 IODispatchCalloutFromCFMessage + 376

9  CoreFoundation                 0x184012dc4 __CFMachPortPerform + 180

10 CoreFoundation                 0x184027a54 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 56

11 CoreFoundation                 0x1840279b4 __CFRunLoopDoSource1 + 436

12 CoreFoundation                 0x184025934 __CFRunLoopRun + 1640

13 CoreFoundation                 0x183f512d4 CFRunLoopRunSpecific + 396

14 GraphicsServices               0x18d63f6fc GSEventRunModal + 168

15 UIKit                          0x188b16fac UIApplicationMain + 1488

16 Tablet CMD                     0x10001d920 main (main.m:18)

17 libdyld.dylib                  0x195e0ea08 start + 4

[marius · Accepted solution]

The actual error is for "[NSObject(NSObject) doesNotRecognizeSelector:] ". It does not show up in the Crashlytics logs, but it does in the device logs.

In my case it was because an object was observing the AGSMapViewDidEndPanningNotification/AGSMapViewDidEndZoomingNotification notifications and I did not remove the object as an observer, in dealloc.

For whatever reason, the issue was visible only on iOS 8.

M.

Last Exception Backtrace:

0  CoreFoundation                0x2a5000d2 __exceptionPreprocess + 122

1  libobjc.A.dylib              0x38cd8c72 objc_exception_throw + 34

2  CoreFoundation                0x2a505598 -[NSObject(NSObject) doesNotRecognizeSelector:] + 184

3  CoreFoundation                0x2a503474 ___forwarding___ + 708

4  CoreFoundation                0x2a432704 _CF_forwarding_prep_0 + 20

5  CoreFoundation                0x2a4b7ea0 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 8

6  CoreFoundation                0x2a4119e8 _CFXNotificationPost + 1796

7  Tablet CMD                    0x0056d880 -[AGSMapViewBase ags_mapHasDrawn] + 1984

8  Tablet CMD                    0x0048ffc4 -[AGSMapRenderer drawRequested] + 760

9  Tablet CMD                    0x0048f882 -[AGSMapRenderer pulse:] + 370

10  QuartzCore                    0x2d5c2b62 CA::Display::DisplayLinkItem::dispatch() + 94

11  QuartzCore                    0x2d5c29ca CA::Display::DisplayLink::dispatch_items(unsigned long long, unsigned long long, unsigned long long) + 362

12  IOMobileFramebuffer          0x32342bfe IOMobileFramebufferVsyncNotifyFunc + 86

13  IOKit                        0x2b47ad08 IODispatchCalloutFromCFMessage + 252

14  CoreFoundation                0x2a4b5330 __CFMachPortPerform + 128

15  CoreFoundation                0x2a4c5826 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 30

16  CoreFoundation                0x2a4c57c2 __CFRunLoopDoSource1 + 342

17  CoreFoundation                0x2a4c3de4 __CFRunLoopRun + 1604

18  CoreFoundation                0x2a40f6cc CFRunLoopRunSpecific + 472

19  CoreFoundation                0x2a40f4de CFRunLoopRunInMode + 102

20  GraphicsServices              0x31d8b1a4 GSEventRunModal + 132

21  UIKit                        0x2dbc1440 UIApplicationMain + 1436

22  Tablet CMD                    0x00048878 main (main.m:18)

23  libdyld.dylib                0x392a6aaa tlv_initializer + 2