Hi there,
We see this weird crashes that seem to be caused by a memory issue in CFReadStreamRead. It's happening on iOS 11.4 and iOS 12.1. We cannot related it to any specific activity of the app. Is it a CoreFoundation issue? Any workarounds? Thanks in advance.
OS Version: iPhone OS 11.4.1 (15G77)
Report Version: 104
Exception Type: SIGSEGV
Exception Codes: SEGV_ACCERR at 0x11181bffc
Crashed Thread: 5
Thread 5 Crashed:
0 libsystem_platform.dylib 0x0000000185002a00 _platform_memmove + 48
1 CoreFoundation 0x00000001852e98b4 dataRead + 108
2 CoreFoundation 0x00000001852d5fac CFReadStreamRead + 480
3 CFNetwork 0x00000001859d9f30 formRead(__CFReadStream*, unsigned char*, long, __CFError**, unsigned char*, void*) + 52
4 CoreFoundation 0x00000001852d6060 CFReadStreamRead + 660
5 CFNetwork 0x0000000185ba31bc HTTPTransaction::RequestBodyStream::_bufferRequestBodyFromStream_offqueue() + 144
6 libdispatch.dylib 0x0000000184cd8a60 _dispatch_client_callout + 12
7 libdispatch.dylib 0x0000000184ce0170 _dispatch_block_invoke_direct$VARIANT$mp + 220
8 CFNetwork 0x0000000185bbbe40 RunloopBlockContext::_invoke_block(void const*, void*) + 32
9 CoreFoundation 0x00000001852ac680 CFArrayApplyFunction + 76
10 CFNetwork 0x0000000185bbbd00 RunloopBlockContext::perform() + 124
11 CFNetwork 0x0000000185bbcec4 MultiplexerSource::perform() + 308
12 CFNetwork 0x0000000185bbcc24 MultiplexerSource::_perform(void*) + 56
13 CoreFoundation 0x000000018538f404 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 20
14 CoreFoundation 0x000000018538ec2c __CFRunLoopDoSources0 + 272
15 CoreFoundation 0x000000018538c79c __CFRunLoopRun + 1200
16 CoreFoundation 0x00000001852acda8 CFRunLoopRunSpecific + 548
17 CFNetwork 0x0000000185bba6e0 -[__CoreSchedulingSetRunnable runForever] + 216
18 Foundation 0x0000000185e31efc __NSThread__start__ + 1036
19 libsystem_pthread.dylib 0x000000018500d220 _pthread_body + 268
20 libsystem_pthread.dylib 0x000000018500d110 _pthread_start + 288
21 libsystem_pthread.dylib 0x000000018500bb10 thread_start + 0
oreFoundation 0x00000001852acda8 CFRunLoopRunSpecific + 548 17 CFNetwork 0x0000000185bba6e0 -[__CoreSchedulingSetRunnable runForever] + 216 18 Foundation 0x0000000185e31efc __NSThread__start__ + 1036 19 libsystem_pthread.dylib 0x000000018500d220 _pthread_body + 268 20 libsystem_pth 0x0000000185bbbe40 RunloopBlockContext::_invoke_block(void const*, void*) + 32 9 CoreFoundation 0x00000001852ac680 CFArrayApplyFunction + 76 10 CFNetwork 0x0000000185bbbd00 RunloopBlockContext::perform() + 124 11 CFNetwork 0x0000000185bbcec4 MultiplexerSource::perform() + 308 12 CFNetwork 0x0000000185bbcc24 MultiplexerSource::_perform(void*) + 56 13 CoreFoundati 0x000000018538ec2c __CFRunLoopDoSources0 + 272 15 CoreFoundation