lv2 crashes ardour and jalv

[magnetophon]

This is with the latest git version. Both ardour 3 and 4 are affected.

Unfortunately I have not been able to build a debug build of ardour. It is not available in ingen for some reason.

jalv.gtk http://studionumbersix.com/foo/lv2/yc20 gives me: Plugin: http://studionumbersix.com/foo/lv2/yc20 Feature http://lv2plug.in/ns/ext/event is not supported

I'm using lv2-1.10.0