this is a font that triggers the problem:
i then converted this to OTF using a windows build of fontforge.
which i uploaded here:
if you select all possible glyphs and then export, it crashes.
btw, i have a question about the meaning of the additional font file that can be specified.
A) one that should be used to fill missing glyps for the one that is selected in the box above
B) one where all glyphs should be taken from