I’m trying to track a exc-bad-access. I have run Instruments with NSZombie enabled, I get this error log when the app crashes. There is a UIView which is autoreleased four times, but before the autoreleased pool is drained it just has a reference count of 3 so int ends with -1 reference count.
I am not sending any autoreleased messages myself, so how can I solve this?
# Category Event Type RefCt Timestamp Address Size Responsible Library Responsible Caller
0 UITextView Malloc 1 00:09.478.888 0x80c2920 448 UIKit -[UIRuntimeConnection initWithCoder:]
1 UITextView Retain 2 00:09.492.814 0x80c2920 0 UIKit -[UITextView resignFirstResponder]
2 UITextView Autorelease 00:09.492.822 0x80c2920 0 UIKit -[UITextView resignFirstResponder]
3 UITextView Retain 3 00:09.494.396 0x80c2920 0 UIKit -[UIRuntimeConnection initWithCoder:]
4 UITextView Retain 4 00:09.494.400 0x80c2920 0 Foundation -[NSKeyedUnarchiver _replaceObject:withObject:]
5 UITextView Release 3 00:09.494.403 0x80c2920 0 UIKit -[UIRuntimeConnection initWithCoder:]
6 UITextView Retain 4 00:09.494.407 0x80c2920 0 UIKit -[UIRuntimeConnection initWithCoder:]
7 UITextView Release 3 00:09.494.448 0x80c2920 0 UIKit -[UIRuntimeConnection initWithCoder:]
8 UITextView Autorelease 00:09.494.845 0x80c2920 0 UIKit -[UIRuntimeConnection initWithCoder:]
9 UITextView Retain 4 00:09.494.848 0x80c2920 0 UIKit -[UIRuntimeConnection initWithCoder:]
10 UITextView Retain 5 00:09.495.215 0x80c2920 0 Foundation -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:]
11 UITextView Retain 6 00:09.495.230 0x80c2920 0 Foundation -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:]
12 UITextView Release 5 00:09.495.241 0x80c2920 0 Foundation -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:]
13 UITextView Retain 6 00:09.495.255 0x80c2920 0 Foundation -[NSArray(NSArray) initWithCoder:]
14 UITextView Release 5 00:09.495.277 0x80c2920 0 UIKit -[UIView initWithCoder:]
15 UITextView Retain 6 00:09.495.325 0x80c2920 0 UIKit -[UIView(Internal) _addSubview:positioned:relativeTo:]
16 UITextView Release 5 00:09.499.036 0x80c2920 0 UIKit -[UINib instantiateWithOwner:options:]
17 UITextView Retain 6 00:09.499.306 0x80c2920 0 Foundation -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:]
18 UITextView Retain 7 00:09.499.325 0x80c2920 0 Foundation -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:]
19 UITextView Release 6 00:09.499.336 0x80c2920 0 Foundation -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:]
20 UITextView Retain 7 00:09.499.358 0x80c2920 0 Foundation -[NSArray(NSArray) initWithCoder:]
21 UITextView Release 6 00:09.499.385 0x80c2920 0 UIKit -[UINib instantiateWithOwner:options:]
22 UITextView Retain 7 00:09.499.511 0x80c2920 0 Proyecto3 -[EventoDetailViewControllerClass setNombreTextView:]
23 UITextView Release 6 00:09.499.681 0x80c2920 0 Foundation -[NSKeyedUnarchiver dealloc]
24 UITextView Release 5 00:09.499.747 0x80c2920 0 Foundation -[NSKeyedUnarchiver dealloc]
25 UITextView Release 4 00:09.499.762 0x80c2920 0 Foundation -[NSKeyedUnarchiver dealloc]
26 UITextView Release 3 00:09.499.817 0x80c2920 0 Foundation -[NSKeyedUnarchiver dealloc]
27 UITextView Release 2 00:09.499.880 0x80c2920 0 UIKit -[UIRuntimeConnection dealloc]
28 UITextView Retain 3 00:09.534.891 0x80c2920 0 QuartzCore -[CALayer layoutSublayers]
29 UITextView Release 2 00:09.534.895 0x80c2920 0 QuartzCore CALayerLayoutIfNeeded
30 UITextView Retain 3 00:09.607.480 0x80c2920 0 UIKit -[UIView(Hierarchy) subviews]
31 UITextView Retain 4 00:09.607.947 0x80c2920 0 UIKit -[UITouch(UITouchInternal) setView:]
32 UITextView Retain 5 00:09.607.951 0x80c2920 0 UIKit -[UITouch(UITouchInternal) setGestureView:]
33 UITextView Retain 6 00:09.608.655 0x80c2920 0 UIKit -[UITouch view]
34 UITextView Autorelease 00:09.608.658 0x80c2920 0 UIKit -[UITouchesEvent _clearViewForTouch:]
35 UITextView Release 5 00:09.608.661 0x80c2920 0 UIKit -[UITouch(UITouchInternal) setView:]
36 UITextView Release 4 00:09.608.666 0x80c2920 0 UIKit -[UITouch(UITouchInternal) setGestureView:]
37 UITextView Release 3 00:09.608.807 0x80c2920 0 Foundation -[NSAutoreleasePool release]
38 UITextView Retain 4 00:09.609.307 0x80c2920 0 UIKit -[UITouch(UITouchInternal) setView:]
39 UITextView Retain 5 00:09.609.311 0x80c2920 0 UIKit -[UITouch(UITouchInternal) setGestureView:]
40 UITextView Retain 6 00:09.725.677 0x80c2920 0 UIKit -[UITouch view]
41 UITextView Autorelease 00:09.725.680 0x80c2920 0 UIKit -[UITouchesEvent _clearViewForTouch:]
42 UITextView Release 5 00:09.725.684 0x80c2920 0 UIKit -[UITouch(UITouchInternal) setView:]
43 UITextView Release 4 00:09.725.688 0x80c2920 0 UIKit -[UITouch(UITouchInternal) setGestureView:]
44 UITextView Release 3 00:09.725.839 0x80c2920 0 Foundation -[NSAutoreleasePool release]
45 UITextView Zombie -1 00:11.383.459 0x80c2920 0 UIKit -[UIView(Internal) _invalidateSubviewCache]
When using Instruments to profile Leaks, it’s best to ignore any leaks that are shown as attributed to Apple libraries. The Leaks to investigate are those show to originate in your app’s code.
Objects that are autoreleased are released when the pool is drained. If you haven’t created any of your own objects that are autoreleased, then the only autoreleased objects must be Apple’s own, e.g.
[NSString string].I assume you have already run the Analyzer and resolved all issues highlighted? If not, that’s the first step.
Next, look at the line where the
EXC_BAD_ACCESSoccurs. It*may*offer a clue as to the offending object. Chances are that – or some other – object are being released prematurely, or alternatively you have not retained them sufficiently.When that happens, at some point the runtime will deallocate them. Trying to access them causes the dreaded
EXC_BAD_ACCESS.Here’s the link to Lou Franco’s explanation on
EXC_BAD_ACCESSand how to track it down:Understanding EXC_BAD_ACCESS