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Tue May 3 15:05:30 PDT 2016


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Date: Mon, 11 Jul 2016 21:44:28 -0700
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<html>
    <head>
      <base href="https://bugs.webkit.org/" />
    </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 - for-in over object with a Symbol key breaks upon JITing"
   href="https://bugs.webkit.org/show_bug.cgi?id=159664">159664</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>for-in over object with a Symbol key breaks upon JITing
          </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>chrisjshull&#64;gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>See <a href="http://jsbin.com/pelokucuwe/1/edit?js,console">http://jsbin.com/pelokucuwe/1/edit?js,console</a>

Console shows that iterating over an object with a Symbol key breaks over time (theory is due to JITing).

Observed:
[&quot;bar&quot;, function bar() {}]
[&quot;bar&quot;, 1]

Expected:
[&quot;bar&quot;, function bar() {}]
[&quot;bar&quot;, function bar() {}]



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