Created attachment 144447 [details]
Stacktrace of segfault

As the description says, I've created a source, and when I open the source, it
crashes because it's trying to turn a NULL into a pystring. More specifically,
cur_text. Either cur_text should be "" initially, the wrapper function should
check it, or PyString should handle null gracefully.

I tried the second option, but the autogenerated stuff didn't like it. Tried to
put 

(define-virtual impl_search
  (of-object "RBSource")
  (return-type "none")
  (parameters
    '("RBSourceSearch*" "search")
    '("const-char*" "cur_text"  (null-ok) (default "\"\""))
    '("const-char*" "new_text")
  )
)
in rb.defs.

Stacktrace attached, along with plugin that caused the problem. You should
comment out the Spytify stuff, because it wont work without a proper username
and password.