iOS app crashs on startup error

I noticed that my app installed on iPhone from Appstore crashed immediatly after startup. I removed it from the phone and installed it again, everything worked.

Now I have to modify that app, I developed it with visual studio and xamarin. When I try to debug the app on a device I can only see the splash image, then the app crash

I tried to put breakpoints on visual studio, in the AppDelegate.cs file too, but none of them are hitted.

the crash log found on the mac is:

Incident Identifier: D467E779-D524-4F17-A125-4024E1C088D7
CrashReporter Key: 14d9c0d9f9fd92fe140f6f76ff2facb91db70c6e
Hardware Model: iPhone5,2
Process: tabbed [974]
Path:
/private/var/containers/Bundle/Application/E5A36250-868F-4330-A950-1E9A6FE13294/tabbed.app/tabbed
Identifier: it.fi.comune.firenzeup
Version:
1.1.38 (1.1.38)
Code Type: ARM (Native)
Parent Process: launchd [1]


Date/Time:
2016-09-15 14:44:56.56 +0200
Launch Time: 2016-09-15 14:44:55.55 +0200
OS Version: iOS 9.3.4 (13G35)
Report Version: 105


Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Triggered by Thread: 0


Filtered syslog:
None found


Last Exception Backtrace:
(0x21639b06 0x20df6dfa 0xa9b56 0xdaff8 0x20df7ab6 0x20dfd998 0x20dfd89e 0x20e03d16 0x7ed9ce 0x7ee5de 0x1e92ac 0x7ee74c 0x211f486e)


Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x212c7c5c 0x212b3000 + 85084
1 libsystem_pthread.dylib 0x2136db46 0x2136a000 + 15174
2 libsystem_c.dylib 0x2125c0c4 0x21211000 + 307396
3 libc++abi.dylib 0x20dd27dc 0x20dd2000 + 2012
4 libc++abi.dylib 0x20deb6a0 0x20dd2000 + 104096
5 libobjc.A.dylib 0x20df7098 0x20df0000 + 28824
6 libc++abi.dylib 0x20de8e16 0x20dd2000 + 93718
7 libc++abi.dylib 0x20de85f4 0x20dd2000 + 91636
8 libobjc.A.dylib 0x20df6ed2 0x20df0000 + 28370
9 tabbed 0x000a9b5a 0x8000 + 662362
10 tabbed 0x000daffc 0x8000 + 864252
11 libobjc.A.dylib 0x20df7aba 0x20df0000 + 31418
12 libobjc.A.dylib 0x20dfd99c 0x20df0000 + 55708
13 libobjc.A.dylib 0x20dfd8a2 0x20df0000 + 55458
14 libobjc.A.dylib 0x20e03d1a 0x20df0000 + 81178
15 tabbed 0x007ed9d2 0x8000 + 8280530
16 tabbed 0x007ee5e2 0x8000 + 8283618
17 tabbed 0x001e92b0 0x8000 + 1970864
18 tabbed 0x007ee750 0x8000 + 8283984
19 libdyld.dylib 0x211f4872 0x211f2000 + 10354


Thread 1:
0 libsystem_kernel.dylib
0x212c8864 0x212b3000 + 88164
1 libsystem_pthread.dylib
0x2136ae18 0x2136a000 + 3608
2 libsystem_pthread.dylib
0x2136a9fc 0x2136a000 + 2556


Thread 2 name: Dispatch queue: com.apple.libdispatch-manager
Thread 2:
0
libsystem_kernel.dylib 0x212c92f8 0x212b3000 + 90872
1
libdispatch.dylib 0x211db836 0x211c7000 + 84022
2
libdispatch.dylib 0x211cd916 0x211c7000 + 26902


Thread 3:
0 libsystem_kernel.dylib 0x212c8864 0x212b3000 + 88164
1 libsystem_pthread.dylib 0x2136ae18 0x2136a000 + 3608
2 libsystem_pthread.dylib 0x2136a9fc 0x2136a000 + 2556


Thread 4:
0
libsystem_kernel.dylib 0x212c8864 0x212b3000 + 88164
1
libsystem_pthread.dylib 0x2136ae18 0x2136a000 + 3608
2
libsystem_pthread.dylib 0x2136a9fc 0x2136a000 + 2556


Thread 0 crashed with ARM Thread State (32-bit):
r0: 0x00000000 r1: 0x00000000 r2: 0x00000000 r3: 0x00000000
r4: 0x00000006 r5: 0x382b9000 r6: 0x37516304 r7: 0x014e68e8
r8: 0x17d61670 r9: 0x20dec8fc r10: 0x2665fd10 r11: 0x17d61694
ip: 0x00000148 sp: 0x014e68dc lr: 0x2136db47 pc: 0x212c7c5c
cpsr: 0x00000010


Binary Images:
0x8000 - 0x90bfff tabbed armv7 /var/containers/Bundle/Application/E5A36250-868F-4330-A950-1E9A6FE13294/tabbed.app/tabbed
0x1feba000 - 0x1fee1fff dyld armv7s <023542032680372f8d383c4c2b42a8a3> /usr/lib/dyld
0x20d84000 - 0x20d85fff libSystem.B.dylib armv7s <97146dbaa54a32f5bb5371bbdb465368> /usr/lib/libSystem.B.dylib
0x20d86000 - 0x20dd1fff libc++.1.dylib armv7s <82abc45878c53dfd8e59d088ead88952> /usr/lib/libc++.1.dylib
0x20dd2000 - 0x20decfff libc++abi.dylib armv7s /usr/lib/libc++abi.dylib
0x20df0000 - 0x2115afff libobjc.A.dylib armv7s /usr/lib/libobjc.A.dylib
0x2115b000 - 0x2115ffff libcache.dylib armv7s <2b39436eaf1c3aa384dc88d909bb82ea> /usr/lib/system/libcache.dylib
0x21160000 - 0x21169fff libcommonCrypto.dylib armv7s <39d4afd1f66738cd839cb5653496c3ee> /usr/lib/system/libcommonCrypto.dylib
0x2116a000 - 0x2116efff libcompiler_rt.dylib armv7s <1b2198e6340836198081bc7f5f1877fa> /usr/lib/system/libcompiler_rt.dylib
0x2116f000 - 0x21175fff libcopyfile.dylib armv7s <71718805ccf33657b701b893581eac47> /usr/lib/system/libcopyfile.dylib
0x21176000 - 0x211c6fff libcorecrypto.dylib armv7s <336af202343e3aeb9dfca3c78bc2da15> /usr/lib/system/libcorecrypto.dylib
0x211c7000 - 0x211f1fff libdispatch.dylib armv7s <6a8fa64935873703b59839b66ee598fc> /usr/lib/system/libdispatch.dylib
0x211f2000 - 0x211f4fff libdyld.dylib armv7s <7da9a8ef840834c3ba50a1adaffecad5> /usr/lib/system/libdyld.dylib

Can anyone help me? Thanks

I encountered similar problems with a Xamarin app I created. The problem in my case had to do with the assembly Linker.

Initial the linker was set to 'Don't link'. This is not optimal because the size of the app will be huge. So I changed the setting to 'Link SDK assemblies only'. The app size was reduced dramatically but the linker was a bit rigorous.

I had to tell the linker to skip some assemblies. By trial and error I came to the following assemblies that needed to be included:

• --linkskip System.Runtime
• --linkskip System.IO.FileNotFoundException

• --linkskip System.Threading

• --linkskip System.Threading.Tasks

• --linkskip System.ComponentModel.DataAnnotations

This don't mean that these assemblies are also affecting you, but might give you a clue in what direction you can find your solution.

In Visual Studio you can add the arguments as 'Additional mtouch arguments' Visual Studio image