Question

Sometimes my application is crashing on CFRelease(theURL);

CFURLRef theURL = CFURLCreateFromFSRef( kCFAllocatorDefault, inRef );
NSString *currentPath = [(NSURL *)theURL path];
CFRelease(theURL);  

Thread 0 Crashed:
0   com.apple.CoreFoundation        0x92a53354 CFRelease + 36  

Why?

The Create Rule

Core Foundation functions have names that indicate when you own a
returned object:

Object-creation functions that have “Create” embedded in the name;
Object-duplication functions that have “Copy” embedded in the name. If
you own an object, it is your responsibility to relinquish ownership
(using CFRelease) when you have finished with it.

Answer 1

When CFRelease argument is NULL, the function will crash. Check the value returned from CFURLCreateFromFSRef.