I checked out the code from http://svn.apache.org/repos/asf/velocity/engine/trunk/ I think this is version 1.6.x because it is listed on http://velocity.apache.org/download.cgi But I'm not sure.
When I was playing with the Velocity Template Engine I got a NullPointerException. Maybe it is because of my unusual configuration that this exception didn't occured before to others. But in my opinion this kind of Exceptions may never occur.
To be specific, the Exception is thrown on line 225 in Foreach.java
When the variable hasNextName equals null
hasNextName is a deprecated config setting. It is assigned on line 210: hasNextName = rsvc.getString(RuntimeConstants.HAS_NEXT_NAME);
The included patch makes it NullPointer save: if (!"velocityHasNext".equals(hasNextName))