Ad-hoc crash happens during HTTPS requests

Hard to make a testcase for this issue, for me it happens during HttpImageSource operations (https).

iOS crashlog:

OS Version:          iOS 9.2.1 (13D15)
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

Global Trace Buffer (reverse chronological seconds):
43.391769    CFNetwork                     0x0000000023c3fe45 TCP Conn 0xc0dad60 SSL Handshake DONE
43.398281    CFNetwork                     0x0000000023c3fe45 TCP Conn 0xc1fbd50 SSL Handshake DONE
43.399673    CFNetwork                     0x0000000023c3fe45 TCP Conn 0xc0db580 SSL Handshake DONE
43.448683    CFNetwork                     0x0000000023c3fd7f TCP Conn 0xc1fbd50 starting SSL negotiation
43.449163    CFNetwork                     0x0000000023c3fd7f TCP Conn 0xc0dad60 starting SSL negotiation
43.449913    CFNetwork                     0x0000000023c3fd7f TCP Conn 0xc0db580 starting SSL negotiation
43.449913    CFNetwork                     0x0000000023cbf1a5 TCP Conn 0xc0dad60 complete. fd: 20, err: 0
43.450613    CFNetwork                     0x0000000023cbf1a5 TCP Conn 0xc1fbd50 complete. fd: 21, err: 0
43.451028    CFNetwork                     0x0000000023cbf1a5 TCP Conn 0xc0db580 complete. fd: 19, err: 0
43.451123    CFNetwork                     0x0000000023cc02a7 TCP Conn 0xc0dad60 event 1. err: 0
43.453762    CFNetwork                     0x0000000023cc02a7 TCP Conn 0xc1fbd50 event 1. err: 0
43.453849    CFNetwork                     0x0000000023cc02a7 TCP Conn 0xc0db580 event 1. err: 0
43.516408    CFNetwork                     0x0000000023cc0325 TCP Conn 0xc0db580 started
43.516408    CFNetwork                     0x0000000023cc0325 TCP Conn 0xc0dad60 started
43.516408    CFNetwork                     0x0000000023cc0325 TCP Conn 0xc1fbd50 started
43.520416    CFNetwork                     0x0000000023c3fe45 TCP Conn 0x1fc6ce30 SSL Handshake DONE
43.649639    CFNetwork                     0x0000000023c3fd7f TCP Conn 0x1fc6ce30 starting SSL negotiation
43.650029    CFNetwork                     0x0000000023cbf1a5 TCP Conn 0x1fc6ce30 complete. fd: 17, err: 0
43.651395    CFNetwork                     0x0000000023cc02a7 TCP Conn 0x1fc6ce30 event 1. err: 0
43.793003    CFNetwork                     0x0000000023cc0325 TCP Conn 0x1fc6ce30 started
45.876136    CFNetwork                     0x0000000023c3fe45 TCP Conn 0x1fbcca10 SSL Handshake DONE
46.273859    CFNetwork                     0x0000000023c3fd7f TCP Conn 0x1fbcca10 starting SSL negotiation
46.274328    CFNetwork                     0x0000000023cbf1a5 TCP Conn 0x1fbcca10 complete. fd: 12, err: 0
46.275874    CFNetwork                     0x0000000023cc02a7 TCP Conn 0x1fbcca10 event 1. err: 0
46.518043    CFNetwork                     0x0000000023cc0325 TCP Conn 0x1fbcca10 started
2068.841424  CFNetwork                     0x0000000023c3fe45 TCP Conn 0x1f7d7370 SSL Handshake DONE
2068.842923  CFNetwork                     0x0000000023c3fe45 TCP Conn 0x1f772d90 SSL Handshake DONE
2068.851893  CFNetwork                     0x0000000023c3fe45 TCP Conn 0x1f601e40 SSL Handshake DONE
2068.894151  CFNetwork                     0x0000000023c3fd7f TCP Conn 0x1f772d90 starting SSL negotiation
2068.894830  CFNetwork                     0x0000000023c3fd7f TCP Conn 0x1f7d7370 starting SSL negotiation
2068.894985  CFNetwork                     0x0000000023cbf1a5 TCP Conn 0x1f772d90 complete. fd: 21, err: 0
2068.896077  CFNetwork                     0x0000000023cbf1a5 TCP Conn 0x1f7d7370 complete. fd: 19, err: 0
2068.896364  CFNetwork                     0x0000000023cc02a7 TCP Conn 0x1f772d90 event 1. err: 0
2068.897823  CFNetwork                     0x0000000023c3fd7f TCP Conn 0x1f601e40 starting SSL negotiation
2068.898348  CFNetwork                     0x0000000023cbf1a5 TCP Conn 0x1f601e40 complete. fd: 22, err: 0
2068.898503  CFNetwork                     0x0000000023cc02a7 TCP Conn 0x1f7d7370 event 1. err: 0

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libsystem_kernel.dylib            0x233ddc84 pthread_kill + 8
1   libsystem_pthread.dylib           0x2347fb46 pthread_kill + 62
2   libsystem_c.dylib                 0x233740c4 abort + 108
3   libc++abi.dylib                   0x22eee7dc cxa_bad_cast + 0
4   libc++abi.dylib                   0x22f0766a default_terminate_handler() + 214
5   libobjc.A.dylib                   0x22f130bc _objc_terminate() + 228
6   libc++abi.dylib                   0x22f04e16 std::terminate(void (*)()) + 78
7   libc++abi.dylib                   0x22f048f6 cxa_rethrow + 102
8   libobjc.A.dylib                   0x22f12f46 objc_exception_rethrow + 42
9   CoreFoundation                    0x23659c3e CFRunLoopRunSpecific + 650
10  CoreFoundation                    0x236599ac CFRunLoopRunInMode + 108
11  GraphicsServices                  0x248d3af8 GSEventRunModal + 160
12  UIKit                             0x27945fb4 UIApplicationMain + 144
13  D500px                            0x001e44b2 0x3e000 + 1729714
14  libdyld.dylib                     0x2330c872 start + 2

Thread 1 name:  Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0   libsystem_kernel.dylib            0x233df320 kevent_qos + 24
1   libdispatch.dylib                 0x232f394e _dispatch_mgr_invoke + 254
2   libdispatch.dylib                 0x232e5a2e _dispatch_mgr_thread + 38

Thread 2:
0   libsystem_kernel.dylib            0x233de024 semwait_signal + 24
1   libsystem_c.dylib                 0x23333bcc nanosleep + 172
2   libsystem_c.dylib                 0x23333b1c usleep + 52
3   D500px                            0x0014a568 0x3e000 + 1099112
4   D500px                            0x001cfa60 0x3e000 + 1645152
5   libsystem_pthread.dylib           0x2347ec7e _pthread_body + 138
6   libsystem_pthread.dylib           0x2347ebf2 _pthread_start + 110
7   libsystem_pthread.dylib           0x2347ca08 thread_start + 8

Thread 3 name:  JavaScriptCore::Marking
Thread 3:
0   libsystem_kernel.dylib            0x233dd9c0 psynch_cvwait + 24
1   libsystem_pthread.dylib           0x2347e1a4 _pthread_cond_wait + 536
2   libsystem_pthread.dylib           0x2347f0b8 pthread_cond_wait + 40
3   libc++.1.dylib                    0x22ea869c std::1::condition_variable::wait(std::1::unique_lock<std::1::mutex>&) + 36
4   JavaScriptCore                    0x26623460 JSC::GCThread::waitForNextPhase() + 104
5   JavaScriptCore                    0x266234ce JSC::GCThread::gcThreadMain() + 62
6   JavaScriptCore                    0x2642f2d0 WTF::threadEntryPoint(void) + 148
7   JavaScriptCore                    0x2642f22e WTF::wtfThreadEntryPoint(void) + 14
8   libsystem_pthread.dylib           0x2347ec7e _pthread_body + 138
9   libsystem_pthread.dylib           0x2347ebf2 _pthread_start + 110
10  libsystem_pthread.dylib           0x2347ca08 thread_start + 8

Thread 4 name:  com.apple.NSURLConnectionLoader
Thread 4:
0   libsystem_kernel.dylib            0x233c9bf8 mach_msg_trap + 20
1   libsystem_kernel.dylib            0x233c99f8 mach_msg + 40
2   CoreFoundation                    0x23708f1c CFRunLoopServiceMachPort + 136
3   CoreFoundation                    0x237072a2 CFRunLoopRun + 1050
4   CoreFoundation                    0x23659bb8 CFRunLoopRunSpecific + 516
5   CoreFoundation                    0x236599ac CFRunLoopRunInMode + 108
6   CFNetwork                         0x23ca09e6 +[NSURLConnection(Loader) _resourceLoadLoop:] + 486
7   Foundation                        0x23f6232c NSThreadstart + 1144
8   libsystem_pthread.dylib           0x2347ec7e _pthread_body + 138
9   libsystem_pthread.dylib           0x2347ebf2 _pthread_start + 110
10  libsystem_pthread.dylib           0x2347ca08 thread_start + 8

Thread 5 name:  com.apple.CFSocket.private
Thread 5:
0   libsystem_kernel.dylib            0x233ddf14 select + 20
1   CoreFoundation                    0x2370e3c0 CFSocketManager + 572
2   libsystem_pthread.dylib           0x2347ec7e _pthread_body + 138
3   libsystem_pthread.dylib           0x2347ebf2 _pthread_start + 110
4   libsystem_pthread.dylib           0x2347ca08 thread_start + 8

Thread 6:
0   libsystem_kernel.dylib            0x233de024 semwait_signal + 24
1   libsystem_c.dylib                 0x23333bcc nanosleep + 172
2   libsystem_c.dylib                 0x23333b1c usleep + 52
3   D500px                            0x000f40ea 0x3e000 + 745706
4   D500px                            0x001cfa60 0x3e000 + 1645152
5   libsystem_pthread.dylib           0x2347ec7e _pthread_body + 138
6   libsystem_pthread.dylib           0x2347ebf2 _pthread_start + 110
7   libsystem_pthread.dylib           0x2347ca08 thread_start + 8

Thread 7:
0   libsystem_kernel.dylib            0x233de88c workq_kernreturn + 8
1   libsystem_pthread.dylib           0x2347ce18 _pthread_wqthread + 1036
2   libsystem_pthread.dylib           0x2347c9fc start_wqthread + 8

Thread 8:
0   libsystem_kernel.dylib            0x233de88c workq_kernreturn + 8
1   libsystem_pthread.dylib           0x2347ce18 _pthread_wqthread + 1036
2   libsystem_pthread.dylib           0x2347c9fc start_wqthread + 8

Thread 9:
0   libsystem_kernel.dylib            0x233de88c workq_kernreturn + 8
1   libsystem_pthread.dylib           0x2347ce18 _pthread_wqthread + 1036
2   libsystem_pthread.dylib           0x2347c9fc start_wqthread + 8

Thread 10:
0   libsystem_kernel.dylib            0x233de024 semwait_signal + 24
1   libsystem_c.dylib                 0x23333bcc nanosleep + 172
2   libc++.1.dylib                    0x22ee78f4 std::1::this_thread::sleep_for(std::1::chrono::duration<long long, std::1::ratio<1ll, 1000000000ll> > const&) + 136
3   JavaScriptCore                    0x267e5194 bmalloc::waitUntilFalse(std::1::unique_lock<bmalloc::StaticMutex>&, std::1::chrono::duration<long long, std::1::ratio<1ll, 1000ll> >, bool&) + 188
4   JavaScriptCore                    0x267e4fa4 bmalloc::Heap::scavenge(std::1::unique_lock<bmalloc::StaticMutex>&, std::1::chrono::duration<long long, std::1::ratio<1ll, 1000ll> >) + 36
5   JavaScriptCore                    0x267e4e6a bmalloc::Heap::concurrentScavenge() + 78
6   JavaScriptCore                    0x267e6a76 bmalloc::AsyncTask<bmalloc::Heap, void (bmalloc::Heap::)()>::entryPoint() + 98
7   JavaScriptCore                    0x267e6a10 bmalloc::AsyncTask<bmalloc::Heap, void (bmalloc::Heap::)()>::pthreadEntryPoint(void*) + 8
8   libsystem_pthread.dylib           0x2347ec7e _pthread_body + 138
9   libsystem_pthread.dylib           0x2347ebf2 _pthread_start + 110
10  libsystem_pthread.dylib           0x2347ca08 thread_start + 8

Hello! We have made an internal issue of this and will get back to you when we have more information. Thanks for your report!