Segault Nettle.Hash()->crypt_hash()

Hi,

i try to figure out how to use Nettle.Hash()->crypt_hash().

here a simple test.
Pike v8.0 release 438 running Hilfe v3.5 (Incremental Pike Frontend)
> Nettle.Hash()->crypt_hash("password","$5$123456",5000);
Segmentation fault (core dumped)


maybe someone can explain me how to use it

best regards
thomas