Crash closing bound stream pair, in _CFWriteStreamCopyRunLoopsAndModes
Crash closing bound stream pair, in _CFWriteStreamCopyRunLoopsAndModes
- Subject: Crash closing bound stream pair, in _CFWriteStreamCopyRunLoopsAndModes
- From: Jens Alfke <email@hidden>
- Date: Wed, 20 Aug 2014 15:13:11 -0700
I just got alerted to what looks like an iOS (and Mac OS?) bug that leads to crashes while closing a bound-stream pair. The crash was first reported as a bug[1] against the AFNetworking library, and the conclusion was that it looked like a thread-safety issue in the _CFStreamCopyRunLoopsAndModes function. More recently a developer has been getting this crash in an app using the Couchbase Lite library I work on. (Which does not use AFNetworking, just NSURLConnection.)
Unfortunately there's no record of anyone reporting the bug to Apple or asking DTS about it. I'll file a Radar, but first I wanted to ask here in case the bug's known to have been fixed already.
Here's the backtrace:
1 CoreFoundation __CFTypeCollectionRetain + 101
2 CoreFoundation __CFArrayCreateCopy0 + 380
3 CoreFoundation _CFWriteStreamCopyRunLoopsAndModes + 48
4 CoreFoundation boundPairReadClose + 40
5 CoreFoundation _CFStreamClose + 76
6 CFNetwork CoreStreamBase::_streamInterface_Close() + 52
7 CFNetwork HTTPNetStreamInfo::closeRequestResources() + 82
8 CFNetwork HTTPNetConnection::transmitRequest(HTTPNetStreamInfo*, __CoreWriteStream*, CFStreamError*, unsigned char) + 1370
9 CFNetwork HTTPNetStreamInfo::_httpRequestPayloadCallBack(__CoreReadStream*, unsigned long, void*) + 122
10 CFNetwork CoreReadStreamClient::coreStreamEventsAvailable(unsigned long) + 36
11 CFNetwork CoreStreamBase::_callClientNow(CoreStreamClient*) + 42
12 CFNetwork CoreStreamBase::_streamSetEventAndScheduleDelivery(unsigned long, unsigned char) + 122
13 CFNetwork CoreStreamBase::_streamInterface_SignalEvent(unsigned long, CFStreamError const*) + 34
14 CFNetwork CoreReadStreamFromCFReadStream::_readStreamClientCallBack(__CFReadStream*, unsigned long, void*) + 76
15 CoreFoundation _signalEventSync + 118
16 CoreFoundation _cfstream_shared_signalEventSync + 334
—Jens
[1] https://github.com/AFNetworking/AFNetworking/issues/907
[2] https://github.com/AFNetworking/AFNetworking/issues/907#issuecomment-16719680
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