Unable to run pcapscan example

Hi,

I have been trying to run pcapscan executable under /build/bin directory. However I am seeing a segmentation fault.

I am running the executable as follows ./pcapscan -n 2 local.rules http_traffic_capture.pcap

This is the error message that I get

Pattern file: local.rules
terminate called after throwing an instance of 'std::invalid_argument'
what(): stoi
Aborted (core dumped)

Any leads would be helpful.