LeakTest.m

#import "LeakTest.h"
#import "FailingObject.h"

@interface LeakTest ()
@property (nonatomic, strong) FailingObject *object;
@end

@implementation LeakTest

- (void)performFailure {
    _object = [[FailingObject alloc] init];

    @try {
        [self.object doFail];
        // [_object doFail]; // This would not leak `object`.
    } @catch (NSException *exception) {
        NSLog(@"Caught excepetion: %@", exception.description);
    } @finally {
        NSLog(@"finally");
    }
}

@end