my shame... I did not do NULL check and that was the reason for crash.
With your logging added (processing same body and input PUBLISH as before):
```
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:361]: ps_match_dialog_state_from_body(): vstate is terminated,
tmp_state is terminated
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:388]: ps_match_dialog_state_from_body(): do entered
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:396]: ps_match_dialog_state_from_body(): compared [dialog] with
[text]
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:399]: ps_match_dialog_state_from_body(): node->next
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:388]: ps_match_dialog_state_from_body(): do entered
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:396]: ps_match_dialog_state_from_body(): compared [text] with
[dialog]
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:399]: ps_match_dialog_state_from_body(): node->next
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:388]: ps_match_dialog_state_from_body(): do entered
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:396]: ps_match_dialog_state_from_body(): compared [dialog] with
[text]
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:399]: ps_match_dialog_state_from_body(): node->next
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:388]: ps_match_dialog_state_from_body(): do entered
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:399]: ps_match_dialog_state_from_body(): node->next
Feb 16 08:54:16 0050562c117c /usr/sbin/kamailio[30264]: ERROR: presence
[presentity.c:406]: ps_match_dialog_state_from_body(): going to return rmatch 1
```
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