I am limited on time today, but will try to look at this again tomorrow. It seems like you are having trouble understanding what I need to reproduce the problem, and this has resulted in wasted time and you stuck with no resolution. Steps to reproduce should be clear, complete, unambiguous, and use only out-of-the-box commands to the extent possible. Here is an example (I don't know if this is correct in your case, it's just an example based on my best guess by filling in the pieces you left out):
1) Start AutoCAD.
2) Create a text entity with the TEXT command anywhere on screen.
3) Enter (load "test-lisp") to load the test code.
4) When prompted to select text, select the text entity.
5) Here it crashes with a fatal error, as per attached screen capture.