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      <base href="https://bugs.webkit.org/" />
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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 - ASSERTION FAILED: m_deletionHasBegun"
   href="https://bugs.webkit.org/show_bug.cgi?id=167094">167094</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>ASSERTION FAILED: m_deletionHasBegun
          </td>
        </tr>

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

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

        <tr>
          <th>Version</th>
          <td>WebKit Local 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>WebKit Gtk
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>mcrha&#64;redhat.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>bugs-noreply&#64;webkitgtk.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>similar as <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [URL Parser] ASSERTION FAILED: url == m_string in WebCore::URL::URL"
   href="show_bug.cgi?id=167093">bug #167093</a>, this time WebProcess crashed when I've been moving to another message:

ASSERTION FAILED: m_deletionHasBegun

#0  0x00007fa9bd9c567b in waitpid () at /lib64/libc.so.6
#1  0x00007fa9bb8c9a32 in g_spawn_sync (working_directory=working_directory&#64;entry=0x0, argv=&lt;optimized out&gt;, envp=envp&#64;entry=0x0, flags=flags&#64;entry=G_SPAWN_SEARCH_PATH, child_setup=child_setup&#64;entry=0x0, user_data=user_data&#64;entry=0x0, standard_output=0x0, standard_error=0x0, exit_status=0x0, error=0x7ffce29bb738) at gspawn.c:410
#2  0x00007fa9bb8c9e56 in g_spawn_command_line_sync (command_line=&lt;optimized out&gt;, standard_output=0x0, standard_error=0x0, exit_status=0x0, error=0x7ffce29bb738) at gspawn.c:727
#3  0x00007fa9a1de8703 in run_bug_buddy (appname=0x91cc60 &quot;WebKitWebProcess&quot;, pid=11763) at gnome-segvhanlder.c:245
#4  0x00007fa9a1de85bf in bugbuddy_segv_handle (signum=11) at gnome-segvhanlder.c:196
#5  0x00007fa9bd92e9a0 in &lt;signal handler called&gt; () at /lib64/libc.so.6
#6  0x00007fa9ba579f8b in WTFCrash () at /build/test-wk2/lib/libjavascriptcoregtk-4.0.so.18
#7  0x00007fa9be2fbe0b in WTF::RefCountedBase::~RefCountedBase() () at /build/test-wk2/lib/libwebkit2gtk-4.0.so.37
#8  0x00007fa9be918464 in WTF::RefCounted&lt;WebCore::EventListener&gt;::~RefCounted() () at /build/test-wk2/lib/libwebkit2gtk-4.0.so.37
#9  0x00007fa9be9182b0 in WebCore::EventListener::~EventListener() () at /build/test-wk2/lib/libwebkit2gtk-4.0.so.37
#10 0x00007fa9be917f72 in WebKit::GObjectEventListener::~GObjectEventListener() () at /build/test-wk2/lib/libwebkit2gtk-4.0.so.37
#11 0x00007fa9be91a073 in WebKit::GObjectEventListener::removeEventListener(_GObject*, WebCore::EventTarget*, char const*, _GClosure*, bool) () at /build/test-wk2/lib/libwebkit2gtk-4.0.so.37
#12 0x00007fa9be95bcec in webkit_dom_html_button_element_remove_event_listener(_WebKitDOMEventTarget*, char const*, _GClosure*, int) () at /build/test-wk2/lib/libwebkit2gtk-4.0.so.37
#13 0x00007fa9be94c6a1 in webkit_dom_event_target_remove_event_listener () at /build/test-wk2/lib/libwebkit2gtk-4.0.so.37
#14 0x00007fa94d11a860 in web_extension_register_element_clicked_in_document (extension=0x96b4a0 [EWebExtension], page_id=1, document=0x7fa9440104e0 [WebKitDOMHTMLDocument], element_class=0xf1d6f8 &quot;attachment-expander&quot;)
    at /data/develop/test-wk2/evolution/src/web-extensions/e-web-extension.c:311
#15 0x00007fa94d11b589 in handle_method_call (connection=0x95e150 [GDBusConnection], sender=0x7fa94401f960 &quot;:1.375&quot;, object_path=0x7fa94401faf0 &quot;/org/gnome/Evolution/WebExtension&quot;, interface_name=0x7fa94401fb20 &quot;org.gnome.Evolution.WebExtension&quot;, method_name=0x7fa944018310 &quot;RegisterElementClicked&quot;, parameters=0x7fa94401f380, invocation=0x7fa94401d580 [GDBusMethodInvocation], user_data=0x96b4a0)
    at /data/develop/test-wk2/evolution/src/web-extensions/e-web-extension.c:544
#16 0x00007fa9bbe5729c in call_in_idle_cb (user_data=user_data&#64;entry=0x7fa94401d580) at gdbusconnection.c:4836
#17 0x00007fa9bb87e8e7 in g_idle_dispatch (source=0x7fa94401fa50, callback=0x7fa9bbe571b0 &lt;call_in_idle_cb&gt;, user_data=0x7fa94401d580) at gmain.c:5545
#18 0x00007fa9bb881e42 in g_main_dispatch (context=0x936000) at gmain.c:3203
#19 0x00007fa9bb881e42 in g_main_context_dispatch (context=context&#64;entry=0x936000) at gmain.c:3856
#20 0x00007fa9bb8821c0 in g_main_context_iterate (context=0x936000, block=block&#64;entry=1, dispatch=dispatch&#64;entry=1, self=&lt;optimized out&gt;) at gmain.c:3929
#21 0x00007fa9bb8824e2 in g_main_loop_run (loop=0x978ea0) at gmain.c:4125
#22 0x00007fa9ba5e0906 in WTF::RunLoop::run() () at /build/test-wk2/lib/libjavascriptcoregtk-4.0.so.18
#23 0x00007fa9be9f2632 in int WebKit::ChildProcessMain&lt;WebKit::WebProcess, WebKit::WebProcessMain&gt;(int, char**) () at /build/test-wk2/lib/libwebkit2gtk-4.0.so.37
#24 0x00007fa9be9f24e0 in WebProcessMainUnix () at /build/test-wk2/lib/libwebkit2gtk-4.0.so.37
#25 0x000000000040085a in main ()</pre>
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