getting this exception [CFURL release]: message sent to deallocated instance 0x1049530 when debugging iPhone application.

Question

Hi,

this is the code, which might be cause to generate this exception

NSURL *justURL = [NSURL URLWithString:wJustUrl];//wJustUrl declared in constant file.
//NSURL *justURL = [[NSURL alloc] initWithString:wJustUrl];
NSLog(@"%@",justURL);
//self.justArray = [[NSArray alloc] initWithContentsOfURL:justURL];
self.justArray = [NSArray arrayWithContentsOfURL:justURL];
NSLog(@"%@", justArray);

and this is consol log

2008-12-06 18:09:21.602 XYZ[4309:4a03] *** -[CFURL release]: message sent to deallocated instance 0x1049730

[Session started at 2008-12-06 18:09:21 +1100.]
Loading program into debugger…
GNU gdb 6.3.50-20050815 (Apple version gdb-962) (Sat Jul 26 08:14:40 UTC 2008)
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This GDB was configured as "i386-apple-darwin".warning: Unable to read symbols for "/System/Library/Frameworks/UIKit.framework/UIKit" (file not found).
warning: Unable to read symbols from "UIKit" (not yet mapped into memory).
warning: Unable to read symbols for "/System/Library/Frameworks/CoreGraphics.framework/CoreGraphics" (file not found).
warning: Unable to read symbols from "CoreGraphics" (not yet mapped into memory).
warning: Unable to read symbols for "/System/Library/Frameworks/MediaPlayer.framework/MediaPlayer" (file not found).
warning: Unable to read symbols from "MediaPlayer" (not yet mapped into memory).
Program loaded.
sharedlibrary apply-load-rules all
Attaching to program: `/Users/TR/Library/Application Support/iPhone Simulator/User/Applications/9CD50618-72D7-462A-88F7-59C48417D30D/ABC.app/ABC', process 4309.
[Switching to process 4309 thread 0x4a03]
[Switching to process 4309 thread 0x20b]
[Switching to process 4309 thread 0x20b]

I Activated the NSZombieEnabled facility in my project, and I come to know that's I m sending message to deallocated instace.but I didn't deallocated any resource.

plz help me to come out of this .

cheers

Answer 1

Just a shot in the dark (haven't bothered to test how it would behave), but are you certain that -URLWithString: is returning a value? Are you seeing the URL in the log after the NSLog?

If -URLWithString: doesn't like the URL (for example, if there's a space in it) then it will return a nil value, which -arrayWithContentsOfURL: might not like.

Answer 2

Are you calling [justURL release] anywhere? You shouldn't, since it is autoreleased for you...

Answer 3

I did the exact same thing, e.g. calling [justURL release].. commented that and voila!