Slicing thread freeze

[walter]

version: 3.01
OS: OSX Yosemite

I'm running into some problems slicing a file and though it might be useful for debugging (factory file attached). If you slice it with the settings in the included process the slicing thread hangs while "Looking for overhangs...", the program continues to work but you can't cancel or exit cleanly. If you tweak some of the support settings (decrease the number of dense support layers or increase the support pillar resolution, it slices successfully, but generates gcode that looks like this:

G1 X98.332 Y209.933 E0.5669
G1 X98.332 Y209.933 E0.5669
G1 X98.334 Y209.933 E0.5670
G1 X98.335 Y209.933 E0.5670
G1 X98.335 Y209.934 E0.5670
G1 X98.337 Y209.934 E0.5670
G1 X98.339 Y209.935 E0.5671
G1 X98.339 Y209.935 E0.5671
G1 X98.341 Y209.935 E0.5672
G1 X98.342 Y209.935 E0.5672
G1 X98.342 Y209.936 E0.5672
G1 X98.343 Y209.936 E0.5672
G1 X98.344 Y209.936 E0.5673
G1 X98.346 Y209.936 E0.5673
G1 X98.347 Y209.937 E0.5673
G1 X98.348 Y209.937 E0.5673
G1 X98.348 Y209.937 E0.5674
G1 X98.350 Y209.938 E0.5674
G1 X98.352 Y209.938 E0.5675
G1 X98.352 Y209.938 E0.5675
G1 X98.353 Y209.939 E0.5675


My printer (running a smoothieboard / smoothieware) tends to choke on gcode like that so I have to post process the gcode file before printing. Simplify3D does identify some self intersecting surfaces in this file which may be causing the problems.