Incorrect "together-not-middle" clues

[areinhardt]

I know the game hasn't been updated in a while, but today I came across an unexpected situation for the second time and thought I'd let you know. Happens both when compiling from scratch as well when using the watson 0.8.3.1 OSX binaries.

Specifically, I was receiving the following hint, applying which led to the "Something is wrong. An item was ruled out incorrectly." message.

Hitting s shows the following solution:

[koro-xx]

Mmm, that's odd. I'll check it out whenever I have some time to spare. I haven't actually touched this in quite a while indeed. Thanks for letting me know.

[koro-xx]

I was never able to recreate this bug. It's odd that you get it both compiling from source and from the binaries, and I never get it.
Did you have to use it many times to get this bug?

[koro-xx]

I think it is fixed in the latest release (the culprit was the clue "simplification" in filter_clues())