<html>
    <head>
      <base href="http://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - False positive when using a category on NSMutableArray"
   href="http://llvm.org/bugs/show_bug.cgi?id=18908">18908</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>False positive when using a category on NSMutableArray
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Macintosh
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>MacOS X
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Static Analyzer
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>kremenek@apple.com
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>carsten.wenderdel@immobilienscout24.de
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>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.</pre>
        </div>
      </p>
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