Added an error-handling wrapper to Debugger's use of printOn:.
Added an error-handling wrapper to Debugger's use of printOn:.

briantrice/slate-language,briantrice/slate-language,krfkeith/slate-language,krfkeith/slate-language,krfkeith/slate-language,briantrice/slate-language,krfkeith/slate-language,briantrice/slate-language,briantrice/slate-language,briantrice/slate-language,krfkeith/slate-language,krfkeith/slate-language