Crash when starting outgoing call

[johnryan]

Got a SIGABRT ABORT when trying to begin a call...not sure how to reproduce it, but does anyone know what might cause this?

Thread : Crashed: com.apple.main-thread
0 libsystem_kernel.dylib 0x33d90dfc pthread_kill + 8
1 libsystem_pthread.dylib 0x33e0ed37 pthread_kill + 62
2 libsystem_c.dylib 0x33d30909 abort + 76
3 libsystem_c.dylib 0x33d10369 basename
4 App 0x003b666f pj_mutex_lock
5 App 0x0038e6d9 pjsua_call_make_call
6 App 0x003720b1 -[GSOutgoingCall begin]
7 libdispatch.dylib 0x33caa7bb _dispatch_call_block_and_release + 10
8 libdispatch.dylib 0x33caa7a7 _dispatch_client_callout + 22
9 libdispatch.dylib 0x33cadfa3 _dispatch_main_queue_callback_4CF + 718
10 CoreFoundation 0x25f5a3b1 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 8
11 CoreFoundation 0x25f58ab1 __CFRunLoopRun + 1512
12 CoreFoundation 0x25ea63c1 CFRunLoopRunSpecific + 476
13 CoreFoundation 0x25ea61d3 CFRunLoopRunInMode + 106
14 GraphicsServices 0x2d2a40a9 GSEventRunModal + 136
15 UIKit 0x294b5fa1 UIApplicationMain + 1440
16 App 0x000e8e7b main (main.m:16)