Critical Description
When faced with repeated sequences of misaligned blocks, the LBM may corrupt one while deleting its neighbor. This is due to the aligning behavior in the hole punching code: aligning up to the nearest filesystem block boundary is incorrect behavior if the following block is misaligned.
Note: misaligned blocks in the LBM are incredibly rare. To see them, you must have been victimized by KUDU-1793. Repeated sequences of misaligned blocks are even rarer; I'm not even sure if they're possible.