Inkscape 0.92 Freeze On SIOX Trace

Steps to reproduce:

Working through Tavmjong Bah Inkscape Guide Quickstart Exercise A Bottle-Photorealism.

  • open Inkscape
  • Resize canvas to 384 by 512 px
  • Import example bottlex2.jpg downloaded from website
  • Create any path
  • Select both image & path
  • Open Trace Bitmap dialog
  • Check SIOX foreground selection
  • Click OK to start

What happened?

Error message "Inkscape encountered an internal error and will close now." "Automatic backups... etc" Closing error message leaves Inkscape frozen. ... Problem duplicated multiple times on different docs, trace parameters. SIOX apparently the trigger.

What should have happened?

JPEG should have been traced to vector art.

...

Inkscape Version and Operating System:

Inkscape 0.92.4 Windows 10 Home Version 10.0.17763 Asus Z170-WS mobo Intel i7-6700 16GB RAM nVidia GeFore GTX 1080

Inkscape_Crash_2019-04-28_18-24-52