Should error when trying to string concatenate with null
Should error when trying to string concatenate with null

mikebarkas/libsass,technoAri/libsass,mikebarkas/libsass,panicinc/libsass,khchanel/libsass,TBAPI-0KA/NSass,mtwebster/mint-libsass,TBAPI-0KA/NSass,mikebarkas/libsass,mikebarkas/libsass,TBAPI-0KA/NSass,technoAri/libsass,panicinc/libsass,FishingCactus/libsass,technoAri/libsass,webdev1001/libsass,panicinc/libsass,webdev1001/libsass,mtwebster/mint-libsass,am11/libsass,FishingCactus/libsass,saper/libsass,FishingCactus/libsass,TBAPI-0KA/NSass,errorx666/libsass,errorx666/libsass,am11/libsass,technoAri/libsass,panicinc/libsass,saper/libsass,khchanel/libsass,webdev1001/libsass,TBAPI-0KA/NSass,errorx666/libsass,FishingCactus/libsass,khchanel/libsass,TBAPI-0KA/NSass,khchanel/libsass,technoAri/libsass,am11/libsass,mikebarkas/libsass,am11/libsass,panicinc/libsass,webdev1001/libsass,FishingCactus/libsass,errorx666/libsass,saper/libsass,mtwebster/mint-libsass,khchanel/libsass,webdev1001/libsass,saper/libsass,mtwebster/mint-libsass,mtwebster/mint-libsass,am11/libsass,saper/libsass