I am the author of pForth. I cannot access the attachment from the URL in message #5. But in comment #10, Albert says the program starts with a @ command. I agree with Albert that pForth is expected to randomly crash in that case. Such a program essentially grabs an undefined address from an underflowing stack and tries to read from that address. That may or may not crash, depending on the address.
PForth is a typical programming language that allows a developer to write incorrect code that can crash. I believe this bug should be closed as "Working As Intended".
