I am transcluding the template Template:NoincludeBug. Note that I am successfully placed inside of the category named "CategoryBug1", as I should be.
I am the main body of this template. I am what gets transcluded when someone refers to me.
Note that, because I have a link to a category named "CategoryBug1", every page which transcludes me will also be put into "CategoryBug1". This is correctly mimicking MediaWiki.