<p>the output of the commands is as below </p>

<p>(gdb) frame 2<br>
<a href="https://github.com/kamailio/kamailio/pull/2" class="issue-link js-issue-link" data-url="https://github.com/kamailio/kamailio/issues/2" data-id="41491271" data-error-text="Failed to load issue title" data-permission-text="Issue title is private">#2</a>  0x00007f25fec371e7 in keepalive_timer (ticks=65354259, data=0x0) at nat_traversal.c:1597<br>
1597            lock_get(&slot->lock);<br>
(gdb) info locals<br>
iteration = 0<br>
contact = 0x0<br>
slot = 0x7f26ffffffff<br>
now = 1463548257<br>
i = 0<br>
(gdb) p *slot<br>
Cannot access memory at address 0x7f26ffffffff</p>

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