I pushed a safety check for this situation in master and 4.3 branches. Not being the
developer of the module I am not sure of other possible side effects, but at least this
kind of crash situation is handled now.
If the issues appears again, reopen the item.
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Reply to this email directly or view it on GitHub:
https://github.com/kamailio/kamailio/issues/417#issuecomment-159592613