Hopefully, Psycle has some workarounds to faulty plugins and this prevents the host to crash most of the times. The message you see could have crashed the host, but it just showed you the problem and continued running.
Said that, this is a native plugin (also it is an effect, not a generator), and i didn't have a report that it used to crash.
There may be problems with this one in concrete, so if it happens each time you use it, just stop using this one.
I am currently trying to improve all the native plugins for a future version so that we can guarantee that they work better. One of the improvements will be that they work with all sampling rates (there are many that sound different if one changes the samplerate, which it shouldn't be).
<[JAZ]> Pa pi pa pa pa pi pa.... ;·D