CASA6 has an exit error (for me)

[teuben]

I'm sure this is just me, a peculiarity, but just in case somebody has the same. Here's hopefully a solution soon.
Upon "quit" or "exit" there is an error, and the log window does not disappear.

This is the error message:
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
File "/a7/astromake.git/opt/casa/casa-6.2.0-124/lib/py/lib/python3.6/site-packages/casashell/private/init_system.py", line 155, in stop_logger
p.kill( )
AttributeError: 'str' object has no attribute 'kill'

[teuben]

I should add a frresh casa6 (where no ~/.casa exists) runs clean, so it's clearly something i do in the startup script.