String duplication glitch

Related to MC-59471

I did some experimenting with this bug and found that it's direction dependent, the direction of the tripwire must be inline with the block offset to the side of the slime block, and the block must be on the south or west side of the slime block for the duplication to occur. If those conditions are not met the string will break as usual when the piston is extended and will not remain in place. Also of note the block offset from the slime block must be a solid block, when tried with glass in the same circumstances it simply broke the string as to be expected.

The bug also does not depend upon the redstone block block-update clock as shown in the screen shots, and in-fact doesn't require any timing whatsoever as you can cause the duplication using just a lever powering the sticky piston. It's also possible to stack up to 6 of these side by side using a single sticky piston, 6 slime blocks, and six solid blocks which results in a very efficient string farm, hence ripe for abuse.

Video demonstrating the cardinality of the design, powering with only a lever, and a sample string farm a player could construct using it (to show the issue): http://youtu.be/ykfbd07UYas

It works in all directions as seen in the third screenshot.

Here is it running on a clock
http://gfycat.com/DearestFrenchDogwoodclubgall

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