the regex is supposed to get... a number value which represent a specific interface and a digit or a string as the second value depends on what that series of digits represent in the beginning

I'm not sure I get all that, but it sounds like you should just focus on simplifying the process. Split the scalar up into lines, and look for matches one line at a time. I would expect that to simplify a lot of things for you. If you have trouble with that, tell us more about what you're actually trying to accomplish, show us a little bit of input data, what you want to extract from it, etc.

In reply to Re^3: regex causing segmentation fault (core dump) by graff
in thread regex causing segmentation fault (core dump) by Otogi

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