Something wrong with this PDF to PS conversion

You guys are pro at deciphering PostScript, I was hoping you can help me
with this problem below. I don't know where else to ask.

Here is a seemingly valid roboto.pdf with a single line of text and one
special character, å. When this PDF is passed through cgpdftops (Apple's PS
filter), it comes out invalid.

GhostScript would say:
GPL Ghostscript 9.05: Error: Font Renderer Plugin ( FreeType ) return code
= -10
Can't render Font RGEZEM+Roboto-Regular with FAPI, will do with native GS
renderer.
Can't render Font F1.1 ( aliased from RGEZEM+Roboto-Regular ) with FAPI,
will do with native GS renderer.

ERROR: rangecheck
Offending command: show

Stack: (!)

What's wrong with the way this PS conversion was done?
Could the original PDF be encoded in a different way to avoid this?

Thanks!
-Alex