don't optimize variable lookups in  (fixes #166)
don't optimize variable lookups in  (fixes #166)

oddbird/nunjucks,campbellwmorgan/nunjucks,campbellwmorgan/nunjucks,node-modules/nunjucks,rhengles/nunjucks,vigetlabs/nunjucks,kevinschaul/nunjucks,oddbird/nunjucks,fabien/nunjucks,AaronO/nunjucks,rhengles/nunjucks,pardo/nunjucks,kevinschaul/nunjucks,campbellwmorgan/nunjucks,carljm/nunjucks,devoidfury/nunjucks,amyboyd/nunjucks,amyboyd/nunjucks,vigetlabs/nunjucks,AaronO/nunjucks,AaronO/nunjucks,robgraeber/nunjucks,vigetlabs/nunjucks,mozilla/nunjucks,mozilla/nunjucks,punkave/nunjucks,robgraeber/nunjucks,node-modules/nunjucks,santoshsahoo/nunjucks,internalfx/nunjucks,santoshsahoo/nunjucks,rhengles/nunjucks,carljm/nunjucks,atorkhov/nunjucks,punkave/nunjucks,santoshsahoo/nunjucks,mozilla/nunjucks,internalfx/nunjucks,node-modules/nunjucks,devoidfury/nunjucks,oddbird/nunjucks,amyboyd/nunjucks,amyboyd/nunjucks,pardo/nunjucks,fabien/nunjucks,pardo/nunjucks,vigetlabs/nunjucks,campbellwmorgan/nunjucks,carljm/nunjucks,kevinschaul/nunjucks,kevinschaul/nunjucks,oddbird/nunjucks,atorkhov/nunjucks,node-modules/nunjucks,internalfx/nunjucks,popomore/nunjucks,atorkhov/nunjucks,punkave/nunjucks,atorkhov/nunjucks,fabien/nunjucks,internalfx/nunjucks,popomore/nunjucks,rhengles/nunjucks,robgraeber/nunjucks,punkave/nunjucks,pardo/nunjucks,robgraeber/nunjucks,devoidfury/nunjucks,AaronO/nunjucks,fabien/nunjucks,carljm/nunjucks,santoshsahoo/nunjucks,popomore/nunjucks