TreeWalker must not try to access parent of root node
TreeWalker must not try to access parent of root node

natejenkins/squire,nsartor/Squire,lzhengms/Squire,xfra35/Squire,nsartor/Squire,yuhange/Squire,Endika/Squire,natejenkins/squire,Endika/Squire,StileEducation/Squire,xfra35/Squire,xiamidaxia/Squire,StileEducation/Squire,gertsonderby/Squire,InteractiveIntelligence/Squire,ProtonMail/Squire,neilj/Squire,neilj/Squire,xiamidaxia/Squire,gertsonderby/Squire,InteractiveIntelligence/Squire,yuhange/Squire,ProtonMail/Squire,lzhengms/Squire