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      <base href="https://bugs.freedesktop.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Xerror in _cairo_xlib_surface_put_shm (calling XCopyArea on a surface destroy)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=72393">72393</a>
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>psychon@znc.in
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Xerror in _cairo_xlib_surface_put_shm (calling XCopyArea on a surface destroy)
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>cairo-bugs@cairographics.org
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

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

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

        <tr>
          <th>Reporter</th>
          <td>seb128@ubuntu.com
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>1.12.16
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>xcb backend
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>cairo
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=90355" name="attach_90355" title="stacktrace of the issue, using GDK_SYNCHRONIZE=1">attachment 90355</a> <a href="attachment.cgi?id=90355&action=edit" title="stacktrace of the issue, using GDK_SYNCHRONIZE=1">[details]</a></span>
stacktrace of the issue, using GDK_SYNCHRONIZE=1

The issue has been reported on
<a href="https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/1211887">https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/1211887</a>

The stracktrace has been collected using GDK_SYNCHRONIZE=1 and b gdk_x_error

(the issue started in Ubuntu 13.10, webkit didn't change compared to Ubuntu
13.04 which didn't have the bug so it might be an issue with GTK or cairo...)

"...
#3  0xb6c9e81e in handle_response (dpy=dpy@entry=0x84f5e98, 
    response=0x93e1360, in_XReply=in_XReply@entry=1) at ../../src/xcb_io.c:325
        async = <optimized out>
        next = <optimized out>
#4  0xb6c9f888 in _XReply (dpy=dpy@entry=0x84f5e98, rep=rep@entry=0xbfffc8e0, 
    extra=extra@entry=0, discard=discard@entry=1) at ../../src/xcb_io.c:627
        event = <optimized out>
        req = 0x91eb330
        response = 0x98d20e8
        error = 0x0
        c = 0x84f67e0
        reply = <optimized out>
        current = 0x91eb330
        __PRETTY_FUNCTION__ = "_XReply"
#5  0xb6c9af5b in XSync (dpy=dpy@entry=0x84f5e98, discard=discard@entry=0)
    at ../../src/Sync.c:44
        rep = {type = 92 '\\', revertTo = 0 '\000', sequenceNumber = 0, 
          length = 110, focus = 119, pad1 = 3066699988, pad2 = 147884176, 
          pad3 = 3086534288, pad4 = 3065589449, pad5 = 3086532608}
#6  0xb6c9aff3 in _XSyncFunction (dpy=0x84f5e98) at ../../src/Synchro.c:35
No locals.
#7  0xb6c7c9ab in XCopyArea (dpy=0x84f5e98, src_drawable=85983698, 
    dst_drawable=85983515, gc=0x95f6c90, src_x=0, src_y=0, width=1, 
    height=200, dst_x=0, dst_y=0) at ../../src/CopyArea.c:61
        req = <optimized out>
#8  0xb6bd65de in _cairo_xlib_surface_put_shm (surface=surface@entry=0xa802900)
    at /build/buildd/cairo-1.12.16/src/cairo-xlib-surface-shm.c:1100
        rects = 0xbfffc9b0
        i = <optimized out>
..."</pre>
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