Description of problem:

As described by customer :

"A NPE is thrown when an event with a timestamp set in the past (before pseudoclock) is modified in RHS, and the LHS of the rule reason over event with an 'after' operator'."

Version-Release number of selected component (if applicable):
6.0.0 GA

How reproducible:

always

Steps to Reproduce:
1. Run the attachment
2. Launch the test
3. Observe the exception

Actual results:

NPE is thrown

Expected results:

NPE is not thrown

Additional info: