WARNING: From function: testing
         spec/sass_3_5/warn-directive/functions-in-stack/input.scss 2:3   issues-warning()
         spec/sass_3_5/warn-directive/functions-in-stack/input.scss 7:11  calls-function-that-warns()
         spec/sass_3_5/warn-directive/functions-in-stack/input.scss 11:3  root stylesheet
         
