Operating system: Ubuntu 18.04.1 LTS
Graphics card: GeForce GT 610. But I am not doing any graphics, so it's unrelated
blender-2.80-9c68ac0448b6-linux-glibc224-x86_64 from 2019-02-07
**Short description of error**
I am creating a new item in collection property, and I am adding data to this item. After a recursive call of the same function, this item is not accessible. Details of errors are in the python code comments.
**Exact steps for others to reproduce the error**
Base on the default startup blend file, load my python script to a text editor and run a script. No errors yet. Find the button "Load tree from json" (properties in 3d viewport) and press it.
An error does not appear when pressed again. You will have to restart blender to repeat the error.