last mile latency measurement parsing error

[ggmartins]

netrics -b

 --- NETWORK MEASUREMENTS ---

 --- google ping latency (MANDATORY) ---
Packet Loss: 0.0%
Average RTT: 35.636 (ms)
Minimum RTT: 43.121 (ms)
Maximum RTT: 58.545 (ms)
RTT Std Dev: 6.759 (ms)
Traceback (most recent call last):
  File "./src/netrics.py", line 360, in <module>
    output['last_mile_rtt'] = test.last_mile_latency('last_mile_rtt', args.last_mile_rtt)
  File "/usr/local/src/nm-exp-active-netrics/src/netrics/netson.py", line 262, in last_mile_latency
    return test_last_mile_latency(key, self, self.nma.conf, self.results, self.quiet)
  File "/usr/local/src/nm-exp-active-netrics/src/netrics/builtin/netrics_test_last_mile_latency.py", line 35, in test_last_mile_latency
    parse_trace_output(out,output,site,results,key,labels)
  File "/usr/local/src/nm-exp-active-netrics/src/netrics/builtin/netrics_test_last_mile_latency.py", line 45, in parse_trace_output
    ip_addr = re.findall(ipv4_extract_pattern, line)[0]
IndexError: list index out of range

[ggmartins]

this is happening because traceroute to 1.1.1.1 does not show any non-local ipv4 address:

traceroute to 1.1.1.1 (1.1.1.1), 30 hops max, 60 byte packets
 1  192.168.12.1 (192.168.12.1)  0.638 ms  0.440 ms  0.351 ms
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