Just reproduced it twice, both times within a few seconds of adding it to an existing set, and dragging its sliders around. Once was when changing "number of lines" and the other when altering "fuzziness" I think.
I just had a crash on a set with just Llines in, but it was when trying to load a new set.
Haven't been able to reproduce crash when animating Lines params using Timeline.
Mess around = change parameter values at random, dragging sliders around without any set pattern.
Win7 x64 Pro | 8GB | Nvidia Go 650M/2GB