I have an issue where I'm getting bad access exceptions but only when running a testing build (calling the same methods in a debug build doesn't cause the problem to come up). The project has ARC enabled and I'm running this on the iPad 5.1 simulator using Xcode 4.3:
Here's where the problem crops up:
- (void)testChangeFoodNotification {
Player* p = [[Player alloc] init];
[p addObserver:self forKeyPath:@"food" options:0 context:0]; // <-EXC_BAD_ACCESS (code=2)
p.food += 1;
STAssertTrue(_wasNotifiedOfFoodChange, nil);
}
At the point when the addObserver: method is called it doesn't seem like any of the objects involved should have been released so what could be causing the exception?
EDIT:
Apologies if it wasn't clear but the code above is being executed as part of a test case (using the standard Xcode OCUnit). Also in case it clarifies anything here's the relevant code from the player class (there's other ivars and methods but they don't have any connection to the property or methods being tested):
// Public interface
@interface Player : NSObject
@property (nonatomic, assign) NSInteger food;
@end
// Private interface
@interface Player() {
NSInteger _food;
}
@end
@implementation Player
@synthesize food = _food;
#pragma mark - Getters/Setters
- (void)setFood:(NSInteger)food {
[self willChangeValueForKey:@"food"];
_food = food;
[self didChangeValueForKey:@"food"];
}