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This is really an uncommon edge case, so this bug in not a priority at all.

While learning how to make a mod I changed a crafting recipe, and I updated the world with "/c game.local_player.force.reset_recipes()". I was still crafting the item with the old recipe, and when I cancelled it this crash happened:
http://pastebin.com/tcDiPeqA

Again, this bug is unlikely to occur in normal gameplay. I'm reporting it because the log asked me to

That is indeed a very specific bug.

But it was an easy fix after finding out how to reproduce it.

Thanks for the report