https://issues.apache.org/bugzilla/show_bug.cgi?id=50416

Nick Burch <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from Nick Burch <[email protected]> 2010-12-14 01:41:32 
EST ---
I've found the problem. In the case of:

* 1
* blank
* 3
* 4

Then when you move 4 to (blank=2) with a shift of 2, it wasn't checking if row
3 existed or not before re-computing the last

In the case of

* 1
* 2
* 3

then moving row 1 to row 4 would also have left it confused

I think I've fixed this in r1048951, along with a slightly expanded version of
your unit test (thanks for that!)

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