https://llvm.org/bugs/show_bug.cgi?id=28746

            Bug ID: 28746
           Summary: Clang Memory Leak False Negative about class
                    UIAlertView
           Product: clang
           Version: 3.8
          Hardware: Macintosh
                OS: MacOS X
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Static Analyzer
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected]
    Classification: Unclassified

#import <UIKit/UIAlertView.h>

@implementation UIAlertViewLeakTest

- (void) leakTest{

    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:nil
message:@"Q_Wi-Fi已断开,是否继续使用2G/3G/4G网络下载视频?" delegate:self
cancelButtonTitle:@"Q_No" otherButtonTitles:@"Q_Yes",nil, nil];  // retain
count is +1 and not release

    UIAlertView *tmp = alert;

}

The UIAlertView instance with reatian count +1 not release ,BUT clang couldn't
check out and tell me . 

Can anyone help and give a reason?

Looking forward to the answer and Appreciate it.

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