Test for null operators.
Test for null operators.

bitrauser/roast,laben/roast,b2gills/roast,niner/roast,cygx/roast,skids/roast,zostay/roast,skids/roast,dankogai/roast,perl6/roast,dogbert17/roast,dogbert17/roast,zostay/roast,niner/roast,dankogai/roast,bitrauser/roast,laben/roast,b2gills/roast,laben/roast,cygx/roast,cygx/roast,niner/roast,skids/roast,b2gills/roast,dankogai/roast,zostay/roast