DrawInRect withAttributes Crashing on iOS8 GM

Question

UIGraphicsBeginPDFContextToFile(filePath, CGRectZero, nil);
UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, pageSize.width, pageSize.height), nil);
CGContextRef    ctx = UIGraphicsGetCurrentContext();

UIFont *bigFont = [UIFont systemFontOfSize:bigFontSize-2];
NSMutableParagraphStyle *paragraphStyleCenter = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
    paragraphStyleCenter.lineBreakMode = NSLineBreakByWordWrapping;
    paragraphStyleCenter.alignment = NSTextAlignmentCenter;
    NSDictionary *bigCenter = @{ NSFontAttributeName: bigFont,NSParagraphStyleAttributeName: paragraphStyleCenter };
CGRect renderingRect = CGRectMake(kMarginInset, kMarginInset -15, (pageSize.width - 2*kMarginInset), stringSize.height);


[tempS drawInRect:renderingRect withAttributes:bigCenter]; //Crash //tempS & renderingRect are valid

This is only a crash when creating a PDF using UIGraphicsBeginPDFContextToFile.

I use the same code for UIView and it works fine.

This works great for iOS7