Trace bitmap, multiple autotracing using too much memory

Memory leaks when using autotracing with multiple scans:

There are huge memory usage when I try to autotrace raster graphics with many scans to SVG. I only have a PC with 4GB RAM and all memory is gone through that process.

Steps to reproduce:

• open Inkscape
• import any raster graphics image, select it and go to Paths
• choose Trace bitmaps, autotrace it with multiple scans (8 or more)

What happened?

My PC froze...

What should have happened?

It should've processed the image, and sent back a reasonable result.

Version Info:

- Inkscape Version: 1.0.1 (0767f8302a, 2020-10-17)
- Operating System: Ubuntu
- Operating System: version: 20.10