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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Web Inspector: Cannot undo in breakpoint editor"
   href="https://bugs.webkit.org/show_bug.cgi?id=152858">152858</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Web Inspector: Cannot undo in breakpoint editor
          </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>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </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>Web Inspector
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>dcrousso+webkit&#64;gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>bburg&#64;apple.com, graouts&#64;webkit.org, joepeck&#64;webkit.org, mattbaker&#64;apple.com, nvasilyev&#64;apple.com, timothy&#64;apple.com, webkit-bug-importer&#64;group.apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>* STEPS TO REPRODUCE:
1. Create a breakpoint
2. Edit the breakpoint
3. Type some text
4. Press Cmd-Z

* Expected
Regular Undo functionality

* Actual
Crash...

-------
Auto-generated details:

Inspected URL:        file:///Users/dcrousso/Documents/Projects/WebKit/WebKitBuild/Release/WebInspectorUI.framework/Resources/Main.html
Loading completed:    true
Frontend User Agent:  Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_2) AppleWebKit/602.1.15+ (KHTML, like Gecko)
Uncaught exceptions:
 - TypeError: change.update is not a function. (In 'change.update(change.from, change.to, [newText])', 'change.update' is undefined) (at BreakpointPopoverController.js:242:22)
-------</pre>
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      </p>
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