Interval intersect with null throws java null pointer exception

[Darren Duncan]

Try to run this CQL:

define x: Interval[1, 10] intersect Interval[5, null)

Expected result is null, but actual result is the CQL Engine dies with a java.lang.NullPointerException.

This bug is demonstrated in a CQL Engine test failure of CqlIntervalOperatorsTest.xml -> TestIntersectNull.

[Darren Duncan]

I consider pull request #82 in particular and also possibly #80 to block any attempt to fix issue #44, as they might have the same cause; or, if the cause is different, the fix probably involves the same area of the code. When the above 2 pull requests are merged, then #44 would be un-blocked.

[JP]

Resolved by #80