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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 - Webkit2Gtk freezes when login into fastmail.com"
   href="https://bugs.webkit.org/show_bug.cgi?id=146725">146725</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Webkit2Gtk freezes when login into fastmail.com
          </td>
        </tr>

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

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

        <tr>
          <th>Version</th>
          <td>420+
          </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>joel&#64;dimbernat.net
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Hello,

Using Archlinux, Epiphany/Web 3.16 - webkit2gtk 2.8.3 - gtk 3.16
When I log into my <a href="https://fastmail.com">https://fastmail.com</a> account, the browser freezes and make the computer unusable. The processes seem to eat all the CPU.

To help debugging, I compiled the code found there: <a href="https://wiki.gnome.org/Projects/WebKitGtk/ProgrammingGuide/Tutorial">https://wiki.gnome.org/Projects/WebKitGtk/ProgrammingGuide/Tutorial</a> replacing webkit.org with fastmail.com.
gcc -o browser main.c `pkg-config webkit2gtk-4.0 --cflags --libs`

It has the same behavior as epiphany, but gave me this output:
radeon: The kernel rejected CS, see dmesg for more information.

which I did, and dmesg shows:
[347915.271229] WebKitPluginPro[10246]: segfault at 0 ip 00007fcc44f31afb sp 00007fff84abe110 error 4 in libwebkit2gtk-4.0.so.37.6.6[7fcc44918000+214d000]
[362680.543470] WebKitPluginPro[17471]: segfault at d0 ip 00007f3e6fbfcc42 sp 00007ffe7cc3c098 error 4 in libgdk-3.so.0.1600.5[7f3e6fbc3000+c1000]
[365053.019788] [drm:radeon_cs_ioctl [radeon]] *ERROR* Failed to parse relocation -22!

I don't think it's radeon related though, because it also freezes on my laptop with intel GPU.</pre>
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