http://llvm.org/bugs/show_bug.cgi?id=18908

            Bug ID: 18908
           Summary: False positive when using a category on NSMutableArray
           Product: clang
           Version: unspecified
          Hardware: Macintosh
                OS: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: Static Analyzer
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected]
    Classification: Unclassified

There seems to be a false positive in the current Xcode versions of the static
analyser (Xcode 5.0.2/5A3005 and 5.1/5B103i)

The warning is: "Arguments to 'NSMutableArray' method 'addObject:safe:' cannot
be nil"

The line with the warning is:
[myMutableArray addObject:someObjectThatCouldBeNil safe:YES];

This method is not part of Apples Code but added through a category by us:
- (void) addObject:(id)anObject safe:(BOOL)value {
    if (value) {
        if (anObject) {
            return [self addObject:anObject];
        }
        return;
    }
    return [self addObject:anObject];
}

The code seems fine to me as we check for nil values.

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