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      <base href="https://bugs.webkit.org/" />

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          <th>Bug ID</th>

          <td><a class="bz_bug_link 

          bz_status_NEW "

   title="NEW - SHOULD NEVER BE REACHED at DerivedSources/WebKit2/WebProcessMessageReceiver.cpp(265) : void WebKit::WebProcess::didReceiveSyncWebProcessMessage"

   href="https://bugs.webkit.org/show_bug.cgi?id=154784">154784</a>

          </td>

        </tr>

        <tr>

          <th>Summary</th>

          <td>SHOULD NEVER BE REACHED at DerivedSources/WebKit2/WebProcessMessageReceiver.cpp(265) : void WebKit::WebProcess::didReceiveSyncWebProcessMessage

          </td>

        </tr>

        <tr>

          <th>Classification</th>

          <td>Unclassified

          </td>

        </tr>

        <tr>

          <th>Product</th>

          <td>WebKit

          </td>

        </tr>

        <tr>

          <th>Version</th>

          <td>Other

          </td>

        </tr>

        <tr>

          <th>Hardware</th>

          <td>PC

          </td>

        </tr>

        <tr>

          <th>OS</th>

          <td>Linux

          </td>

        </tr>

        <tr>

          <th>Status</th>

          <td>NEW

          </td>

        </tr>

        <tr>

          <th>Severity</th>

          <td>Normal

          </td>

        </tr>

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          <th>Priority</th>

          <td>P2

          </td>

        </tr>

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          <th>Component</th>

          <td>WebKit2

          </td>

        </tr>

        <tr>

          <th>Assignee</th>

          <td>webkit-unassigned&#64;lists.webkit.org

          </td>

        </tr>

        <tr>

          <th>Reporter</th>

          <td>mcatanzaro&#64;igalia.com

          </td>

        </tr></table>

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        <pre>I can reliably crash Epiphany with a debug build of WebKit by pressing Ctrl+T (open new tab) then Ctrl+Q (quit) in quick succession. I suspect it's a cross-platform bug as it's hitting this assert:

SHOULD NEVER BE REACHED

DerivedSources/WebKit2/WebProcessMessageReceiver.cpp(265) : void WebKit::WebProcess::didReceiveSyncWebProcessMessage(IPC::Connection &amp;, IPC::MessageDecoder &amp;, std::unique_ptr&lt;IPC::MessageEncoder&gt; &amp;)

I'll reproduce that function in full:

void WebProcess::didReceiveSyncWebProcessMessage(IPC::Connection&amp; connection, IPC::MessageDecoder&amp; decoder, std::unique_ptr&lt;IPC::MessageEncoder&gt;&amp; replyEncoder)

{

    if (decoder.messageName() == Messages::WebProcess::ProcessWillSuspendImminently::name()) {

        IPC::handleMessage&lt;Messages::WebProcess::ProcessWillSuspendImminently&gt;(decoder, *replyEncoder, this, &amp;WebProcess::processWillSuspendImminently);

        return;

    }

    UNUSED_PARAM(connection);

    UNUSED_PARAM(decoder);

    UNUSED_PARAM(replyEncoder);

    ASSERT_NOT_REACHED();

}

My guess is that Messages::WebProcess::ProcessWillSuspendImminently is being sent by WebProcessProxy before the WebProcess object has been constructed and registered its message handlers in the web process.</pre>

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          <li>You are the assignee for the bug.</li>

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