Null Dereference With Objective-c Class methods call

[YLightC]

1. Infer version v1.1.02.
2. MacOS Big Sur 11.3.1
3. infer run --keep-going -o ./infer --compilation-database-escaped compile_commands.json

   xxxx.m:96: error: Null Dereference
   pointer `null` is dereferenced by call to `presentToViewController:animated:completion:error:` at line 96, column 9.
   94.         UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:containerViewController];
   95.         nav.modalPresentationStyle = UIModalPresentationFullScreen;
   96.         [VdnUtils presentToViewController:nav
             ^
   97.                                    animated:YES
   98.                                  completion:^{

   This my VdnUtils

   @interface VdnUtils : NSObject
   + (void)presentToViewController:(UIViewController *)viewController animated:(BOOL)animated completion:(void (^__nullable)(void))completion error:(NSError **)error;
   @end

This function will call [VdnUtils presentToViewController: animated: completion: error:]

- (void)createMpaasWithlaunchPage:(id<Page>)page complete:(UpVdnCompleteBlock)complete error:(UpVdnErrorBlock)error
{
    UIViewController *vc = [[InfoViewCotroller alloc] init];;
    BOOL animated = YES;
    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vc];
    nav.modalPresentationStyle = UIModalPresentationFullScreen;
    [VdnUtils presentToViewController:nav
                                   animated:animated
                                 completion:^{

                                 }
                                      error:nil];
}

[YLightC]

I solved it. It pass error was nil.And this function [VdnUtils presentToViewController: animated: completion: error:] declaration error is **error.And in this function I did this

if (xxx)
{
}  else if (*error != Null) {
}

If pass error is nil, it could be crash, if if (xxx) false.

Thank you for making this tool.