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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Wrong error message in TypeError produced by for..of with null object"
   href="https://bugs.webkit.org/show_bug.cgi?id=159309">159309</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Wrong error message in TypeError produced by for..of with null object
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>JavaScriptCore
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>joepeck&#64;webkit.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>keith_miller&#64;apple.com, mark.lam&#64;apple.com, msaboff&#64;apple.com, sbarati&#64;apple.com
          </td>
        </tr></table>
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        <pre>Summary:
Wrong error message in TypeError produced by for..of with null object

Test:
&lt;script&gt;
function foo() {
    let chain = Promise.resolve();
    for (let x of null)
        console.log(x);
}
foo();
&lt;/script&gt;

Steps to Reproduce:
1. Load test case without the inspector open
2. Open the inspector to view the uncaught exception
  =&gt; Wrong message, but points to the correct location
    [Error] TypeError: null is not an object (evaluating 'Promise.resolve()')</pre>
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