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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - A null compound index value breaks Safari &gt;= 10.1 (and iOS 10.3 beta)"
   href="https://bugs.webkit.org/show_bug.cgi?id=170000">170000</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>A null compound index value breaks Safari &gt;= 10.1 (and iOS 10.3 beta)
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>Safari Technology Preview
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </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>WebCore Misc.
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>me&#64;caseylink.com
          </td>
        </tr></table>
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        <div>
        <pre>Posting this here at the recommendation of &#64;beidson here: <a href="https://github.com/dfahlander/Dexie.js/issues/494">https://github.com/dfahlander/Dexie.js/issues/494</a>

----

If you specify a compound index, and then subsequently attempt to store a record in IDB and the value for that index is null, Safari &gt;= 10.1 blows up with the error message:

&quot;UnknownError – &quot;An unknown error occurred within Indexed Database.&quot;

After this point the database is unusable. It still reports it self as open, but any subsequent calls (e.g., adding an item, opening a transaction) result in further errors.

This affects the iOS 10.3 beta as well.

On Chrome and Firefox, and Safari &lt; 10.1 there is no error, and it works as expected.

--

Sorry for not submitting a pure IDB test case, but I'm only familiar with the Dexie API. Hopefully this can help.

== Test Case ==

source: <a href="https://github.com/Ramblurr/dexie-null-compound-index/blob/master/test-case.html">https://github.com/Ramblurr/dexie-null-compound-index/blob/master/test-case.html</a>
run directly: <a href="https://rawgit.com/Ramblurr/dexie-null-compound-index/master/test-case.html">https://rawgit.com/Ramblurr/dexie-null-compound-index/master/test-case.html</a></pre>
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      </p>


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