Script Editor crashing when running Applescript

I need to extract the phone number of all the contacts in a particular group and for that I am using the following code -

on run {input, parameters}  
    tell application "Contacts"
        set thePeople to every person
        repeat with i from 1 to number of items in thePeople
            set this_person to item i of thePeople
            set inGroup to name of group of this_person
            if inGroup is "Technology" then
                set x to properties of phones of this_person
            end if
        end repeat
    end tell
end run

But whenever I run the code, the script editor crashes and asks me to reopen it even though I have only one contact in that group. What's happening here?