buffer overflow when changing datasets on z/OS

[Eragon615]

I use lftp on IBM Mainframe OSes like z/OS and z/VM as it supports FTPS. However, when connecting to a z/OS system and attempting to cd to a new dataset (I'll put a brief description of what datasets are at the bottom) I get a buffer overflow along with a core dump. The regular linux ftp app works correctly, but as far as I know it doesn't support FTPS.

The other functions seem to work okay, at least ls is displaying the default prefix without failing.

I'm sure you probably didn't test for z/VM or z/OS compatibility and in fact I wouldn't be surprised if you've never even heard of them, but if there's any chance you could fix this, it'd really help me out. And of course, I'd be willing to help out however I can if you need info gathered or things tested.

As for a dataset, in case you aren't familiar, they are how data is stored and organized on z/OS systems. They are made up of one or more qualifiers separated by periods, each being no more than 8 characters long. They can be defined diffidently to function like a flat file, they can store so called "members" and work more like a directory, or they can even be used to store data like databases with keyed entries.