[rules-users] How do I prevent the package registry from being null in my package builder?

[paulB]

Found the problem.  

There was a constraint in a split node that was set as type="rule" and
dialect="java". We had java code in the expression like this:  

return boolean;


So, my guess is that the rule compiler choked on it since it was not rule
logic, didn't catch the error, and the flow was not placed in the registry
as a result.  Later code tried to pull it out, and it was not there.

I would guess there's two psedo bugs here (even though it was our fault for
configuring the process wrong):
1. The compiler code didn't catch the compile error
2. PackageBuilder assumes that a package is in the registry, and crashes the
thread if it is not.

Hope this helps someone else.
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