EXC_BAD_ACCESS in relationship_query.rb#9

[buffpojken]

Intermittently, our application crashes (no obvious pattern) from a EXC_BAD_ACCESS within cdq.

Crash log: http://pastebin.com/xdR7G3CQ

This happens on iOS 8.1.3, using RM 3.3 and cdq 0.1.8.

[kemiller]

That line is pretty innocuous. Hard to tell what it's doing without a test case. Have you submitted an issue to HipByte?

[kemiller]

Oh, actually, you do get these sorts of errors if you try to access a context from the wrong thread. Are you multi-threading, including GCD?

[buffpojken]

Hmm, yes - the app uses GCD but the strange thing is that first a set of operations is
performed with no problems - then cdq.contexts.current.rollback is called to throw away all changes,
and then the issue appears when trying to perform the same set of operations again.

[kemiller]

You can sometimes get away with bad threading behavior, which makes it all the more dangerous. But that's where I'd look.