Crashes when adding an NSParagraphStyleAttributeName

[dhadauzair]

I added code as below:
NSMutableParagraphStyle *style = [[[NSMutableParagraphStyle alloc] init] autorelease];
[style setLineSpacing:5.0];
[attributeStr addAttribute:NSParagraphStyleAttributeName value:style range:NSMakeRange(0, [blankStateStr length])];