[defen]

I tried running that code and for me it segfaulted at line 26 (plugin.get_num_ports() call)

Also, not sure if it's relevant but http://lv2plug.in/plugins/eg-amp returns a 404 for me...

[Joeboy]

Interesting. That line wfm with the latest version of lilv.

And no, that's just a plugin id, the fact there's no web page at that address is a red herring.

Edit: If you're interested in pursuing this further, please get in touch via my website, which is on my profile. Cheers!