Does not allow empty lines

[ZelphirKaltstahl]

Whenever I run a notebook cell with an empty line, I get an error:

(-> (input) (str))  ; execution from left (inner) to right (outer)
(->> (str) (input))  ; execution from right (outer) to left (inner)
; here is an empty line (have to remove the comment for the error to happen)

IndexError: string index out of range

It does not matter where the empty line is. When I remove the empty line it works just fine.

I created a virtualenv using anaconda3. conda list tells me:

jupyter                   1.0.0                    py34_3    defaults
jupyter_client            4.3.0                    py34_0    defaults
jupyter_console           5.0.0                    py34_0    defaults
jupyter_core              4.1.0                    py34_0    defaults

and pip list:

hy (0.11.1)

(leaving away all the other stuff in those outputs)