While working on #15 I noticed the error in the title of this issue when I built from master. The latest binary using installer 4.0.0 did not show that error.

This happens when I do a call to: ldtp.selectitem(...).

I ran a bisect and got this:

There are only 'skip'ped commits left to test.
The first bad commit could be any of:
3a912d3
ef33a26
99732f5
We cannot bisect more!

Two of those commits didn't build that's why it only narrowed it down to three.