The file loaded, that's cool ! But I see some paths are broken because of the duplicate lines. When converting this file with my program I faced the same problem: I had to remove duplicates and reverse-duplicates before joining elements into paths, or I would get tiny closed paths that looks like lines ... I haven't been working on my program lately because I have more pressing things to do, but it's there. https://github.com/tgirod/gocam. To answer your questions, I didn't know dxf2gcode existed...
Thanks a lot for looking into this! This file was originally a SVG, converted to DXF with inkscape. I didn't design the original file, so I don't if the original SVG is also broken. You are right about double lines - I started writing a tool to convert dxf to gcode, and I found this file to be very ugly too.
I forgot to mention I got the error from version 20170925 and from latest git commit
crash when loading a heavy DXF file