Coverity flagged some suspicious code in RBBITableBuilder.java.
Looking at it more closely, it is indeed nonsense code. The good news is that the incorrect lines are effectively a NOP, and that the surrounding code appears to be otherwise correct.
Lines 771-773 should be removed. (The line numbers are offset from master).
Edit: nope, line 773 should have been ...put(s1, ...) It's a little confusing.
The structure of the corresponding C++ code is slightly different; the same problem does not exist there.