IPv6 interface {} is nil, not string

[securebitag]

Jan 28 16:52:05 rs1 birdwatcher[485554]: panic: interface conversion: interface {} is nil, not string
Jan 28 16:52:05 rs1 birdwatcher[485554]: goroutine 33 [running]:
Jan 28 16:52:05 rs1 birdwatcher[485554]: github.com/alice-lg/birdwatcher/bird.parseRouteLines(0xc000126400, 0x12, 0x20, 0x75, 0xc000060180)
Jan 28 16:52:05 rs1 birdwatcher[485554]: #11/root/go/pkg/mod/github.com/alice-lg/birdwatcher@v0.0.0-20220607085947-7f1eb5a0e458/bird/parser.go:335 +0x1089
Jan 28 16:52:05 rs1 birdwatcher[485554]: github.com/alice-lg/birdwatcher/bird.workerForRouteBlockParsing(0xc000060120, 0xc000060180, 0xc0002a60c0)
Jan 28 16:52:05 rs1 birdwatcher[485554]: #11/root/go/pkg/mod/github.com/alice-lg/birdwatcher@v0.0.0-20220607085947-7f1eb5a0e458/bird/parser.go:313 +0x73
Jan 28 16:52:05 rs1 birdwatcher[485554]: created by github.com/alice-lg/birdwatcher/bird.startRouteWorkers.func1
Jan 28 16:52:05 rs1 birdwatcher[485554]: #11/root/go/pkg/mod/github.com/alice-lg/birdwatcher@v0.0.0-20220607085947-7f1eb5a0e458/bird/parser.go:271 +0x65
Jan 28 16:52:05 rs1 systemd[1]: birdwatcher6.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
Jan 28 16:52:05 rs1 systemd[1]: birdwatcher6.service: Failed with result 'exit-code'.

[annikahannig]

I think I need some more details on the birdc output
Can you please attach the output of birdc show route all?

(Or show route table 'master6' all depending on your setup).

[annikahannig]

Looks like parseMainRouteDetail[Bird2] does not fill in the network attribute, so I would need to see the output and check why the regex fails.

[securebitag]

Thanks for your fast feedback.

There are a lot of routes, to much to paste here.
I posted them on pastebin:
https://pastebin.com/QxbHLr8Q

[annikahannig]

Thanks. I could not see anything obviously wrong and tried some of the regexes in use.
I'll need to make a test case out of this and investigate deeper.

[securebitag]

ok, thank you.
if we can help in this case, please let us know.