Use a while let loop in ThreadSafeLayoutNode::traverse_postorder_mut.
Use a while let loop in ThreadSafeLayoutNode::traverse_postorder_mut.

jdramani/servo,dagnir/servo,pyecs/servo,j3parker/servo,emilio/servo,jlegendary/servo,tafia/servo,paulrouget/servo,bjwbell/servo,dsandeephegde/servo,brendandahl/servo,caldwell/servo,karlito40/servo,dati91/servo,WriterOfAlicrow/servo,samfoo/servo,akosel/servo,tschneidereit/servo,szeged/servo,jimberlage/servo,jdramani/servo,karlito40/servo,pgonda/servo,emilio/servo,dsandeephegde/servo,runarberg/servo,pyecs/servo,mbrubeck/servo,s142857/servo,dsandeephegde/servo,ConnorGBrewster/servo,jdramani/servo,AnthonyBroadCrawford/servo,caldwell/servo,deokjinkim/servo,peterjoel/servo,pyfisch/servo,cbrewster/servo,mbrubeck/servo,nerith/servo,jlegendary/servo,A-deLuna/servo,paulrouget/servo,upsuper/servo,emilio/servo,youprofit/servo,ryancanhelpyou/servo,bjwbell/servo,CJ8664/servo,sadmansk/servo,pyecs/servo,caldwell/servo,notriddle/servo,peterjoel/servo,meh/servo,meh/servo,dvberkel/servo,nerith/servo,cbrewster/servo,thiagopnts/servo,samfoo/servo,tempbottle/servo,dhananjay92/servo,kindersung/servo,splav/servo,dvberkel/servo,anthgur/servo,KiChjang/servo,youprofit/servo,GyrosOfWar/servo,dati91/servo,dhananjay92/servo,anthgur/servo,avadacatavra/servo,nrc/servo,s142857/servo,peterjoel/servo,codemac/servo,szeged/servo,RenaudParis/servo,peterjoel/servo,g-k/servo,dati91/servo,RenaudParis/servo,rnestler/servo,kindersung/servo,codemac/servo,tschneidereit/servo,boghison/servo,ConnorGBrewster/servo,saneyuki/servo,aidanhs/servo,zentner-kyle/servo,szeged/servo,aidanhs/servo,tempbottle/servo,mdibaiee/servo,splav/servo,DominoTree/servo,anthgur/servo,runarberg/servo,CJ8664/servo,SimonSapin/servo,anthgur/servo,dati91/servo,fiji-flo/servo,wartman4404/servo,dhananjay92/servo,splav/servo,dsandeephegde/servo,szeged/servo,thiagopnts/servo,saneyuki/servo,dagnir/servo,bjwbell/servo,pyfisch/servo,RenaudParis/servo,rnestler/servo,pyfisch/servo,steveklabnik/servo,nerith/servo,larsbergstrom/servo,RenaudParis/servo,deokjinkim/servo,samfoo/servo,mattnenterprise/servo,mbrubeck/servo,jdramani/servo,peterjoel/servo,emilio/servo,g-k/servo,GyrosOfWar/servo,pyfisch/servo,thiagopnts/servo,jdramani/servo,brendandahl/servo,zentner-kyle/servo,nerith/servo,paulrouget/servo,pyfisch/servo,tschneidereit/servo,AnthonyBroadCrawford/servo,dsandeephegde/servo,CJ8664/servo,steveklabnik/servo,nerith/servo,CJ8664/servo,tafia/servo,jimberlage/servo,meh/servo,bjwbell/servo,avadacatavra/servo,nerith/servo,mbrubeck/servo,larsbergstrom/servo,avadacatavra/servo,ryancanhelpyou/servo,huonw/servo,tempbottle/servo,s142857/servo,dsandeephegde/servo,dhananjay92/servo,meh/servo,emilio/servo,mattnenterprise/servo,DominoTree/servo,nrc/servo,wartman4404/servo,codemac/servo,notriddle/servo,splav/servo,mattnenterprise/servo,avadacatavra/servo,rnestler/servo,mt2d2/servo,notriddle/servo,pgonda/servo,j3parker/servo,brendandahl/servo,canaltinova/servo,rentongzhang/servo,sadmansk/servo,wartman4404/servo,aidanhs/servo,sadmansk/servo,larsbergstrom/servo,caldwell/servo,szeged/servo,DominoTree/servo,DominoTree/servo,aweinstock314/servo,zentner-kyle/servo,nrc/servo,canaltinova/servo,bjwbell/servo,j3parker/servo,youprofit/servo,codemac/servo,avadacatavra/servo,saneyuki/servo,pgonda/servo,larsbergstrom/servo,cbrewster/servo,saneyuki/servo,AnthonyBroadCrawford/servo,A-deLuna/servo,nnethercote/servo,tafia/servo,pyfisch/servo,SimonSapin/servo,CJ8664/servo,sadmansk/servo,walac/servo,jimberlage/servo,samfoo/servo,mbrubeck/servo,akosel/servo,eddyb/servo,A-deLuna/servo,larsbergstrom/servo,paulrouget/servo,nnethercote/servo,tafia/servo,SimonSapin/servo,huonw/servo,dhananjay92/servo,rentongzhang/servo,runarberg/servo,nnethercote/servo,deokjinkim/servo,steveklabnik/servo,splav/servo,aweinstock314/servo,kindersung/servo,eddyb/servo,mt2d2/servo,peterjoel/servo,cbrewster/servo,GyrosOfWar/servo,huonw/servo,huonw/servo,jimberlage/servo,dati91/servo,saneyuki/servo,paulrouget/servo,dagnir/servo,kindersung/servo,walac/servo,KiChjang/servo,huonw/servo,g-k/servo,KiChjang/servo,jimberlage/servo,boghison/servo,fiji-flo/servo,nrc/servo,s142857/servo,mbrubeck/servo,walac/servo,fiji-flo/servo,dsandeephegde/servo,upsuper/servo,meh/servo,DominoTree/servo,jlegendary/servo,SimonSapin/servo,nrc/servo,runarberg/servo,jimberlage/servo,saratang/servo,ryancanhelpyou/servo,anthgur/servo,WriterOfAlicrow/servo,DominoTree/servo,paulrouget/servo,GyrosOfWar/servo,CJ8664/servo,j3parker/servo,mattnenterprise/servo,mdibaiee/servo,aweinstock314/servo,nnethercote/servo,notriddle/servo,vks/servo,huonw/servo,pyecs/servo,DominoTree/servo,tschneidereit/servo,eddyb/servo,larsbergstrom/servo,splav/servo,g-k/servo,eddyb/servo,rentongzhang/servo,fiji-flo/servo,j3parker/servo,nick-thompson/servo,rentongzhang/servo,bjwbell/servo,saratang/servo,akosel/servo,wartman4404/servo,AnthonyBroadCrawford/servo,WriterOfAlicrow/servo,szeged/servo,tempbottle/servo,AnthonyBroadCrawford/servo,codemac/servo,boghison/servo,nnethercote/servo,saneyuki/servo,KiChjang/servo,emilio/servo,mdibaiee/servo,jlegendary/servo,DominoTree/servo,g-k/servo,saneyuki/servo,upsuper/servo,saneyuki/servo,brendandahl/servo,walac/servo,cbrewster/servo,KiChjang/servo,steveklabnik/servo,jlegendary/servo,boghison/servo,pgonda/servo,ryancanhelpyou/servo,walac/servo,WriterOfAlicrow/servo,vks/servo,nick-thompson/servo,pgonda/servo,rentongzhang/servo,dagnir/servo,thiagopnts/servo,aidanhs/servo,avadacatavra/servo,DominoTree/servo,brendandahl/servo,upsuper/servo,brendandahl/servo,pyecs/servo,RenaudParis/servo,aidanhs/servo,mt2d2/servo,vks/servo,steveklabnik/servo,aidanhs/servo,eddyb/servo,youprofit/servo,jlegendary/servo,g-k/servo,nnethercote/servo,caldwell/servo,mattnenterprise/servo,tafia/servo,canaltinova/servo,nerith/servo,tschneidereit/servo,mt2d2/servo,nick-thompson/servo,jimberlage/servo,codemac/servo,dvberkel/servo,nick-thompson/servo,anthgur/servo,A-deLuna/servo,dsandeephegde/servo,mattnenterprise/servo,runarberg/servo,dvberkel/servo,ConnorGBrewster/servo,youprofit/servo,sadmansk/servo,A-deLuna/servo,emilio/servo,aweinstock314/servo,RenaudParis/servo,mattnenterprise/servo,ryancanhelpyou/servo,GyrosOfWar/servo,notriddle/servo,nnethercote/servo,meh/servo,wartman4404/servo,tempbottle/servo,ConnorGBrewster/servo,paulrouget/servo,cbrewster/servo,mbrubeck/servo,pyecs/servo,SimonSapin/servo,pyfisch/servo,thiagopnts/servo,deokjinkim/servo,aidanhs/servo,zentner-kyle/servo,notriddle/servo,canaltinova/servo,walac/servo,sadmansk/servo,splav/servo,saratang/servo,KiChjang/servo,samfoo/servo,peterjoel/servo,mt2d2/servo,nnethercote/servo,vks/servo,jdramani/servo,jimberlage/servo,cbrewster/servo,wartman4404/servo,szeged/servo,akosel/servo,upsuper/servo,aweinstock314/servo,deokjinkim/servo,splav/servo,zentner-kyle/servo,fiji-flo/servo,szeged/servo,paulrouget/servo,jimberlage/servo,huonw/servo,pyfisch/servo,vks/servo,mattnenterprise/servo,saratang/servo,KiChjang/servo,s142857/servo,SimonSapin/servo,sadmansk/servo,nick-thompson/servo,bjwbell/servo,dagnir/servo,caldwell/servo,dagnir/servo,larsbergstrom/servo,saratang/servo,brendandahl/servo,thiagopnts/servo,anthgur/servo,jdramani/servo,tafia/servo,tempbottle/servo,pgonda/servo,peterjoel/servo,larsbergstrom/servo,steveklabnik/servo,vks/servo,saneyuki/servo,tafia/servo,ConnorGBrewster/servo,karlito40/servo,canaltinova/servo,canaltinova/servo,GyrosOfWar/servo,KiChjang/servo,nnethercote/servo,sadmansk/servo,nick-thompson/servo,splav/servo,pgonda/servo,ryancanhelpyou/servo,RenaudParis/servo,karlito40/servo,anthgur/servo,SimonSapin/servo,dvberkel/servo,peterjoel/servo,deokjinkim/servo,j3parker/servo,akosel/servo,vks/servo,notriddle/servo,s142857/servo,runarberg/servo,caldwell/servo,dagnir/servo,larsbergstrom/servo,walac/servo,karlito40/servo,rnestler/servo,rnestler/servo,dvberkel/servo,kindersung/servo,rentongzhang/servo,larsbergstrom/servo,ConnorGBrewster/servo,WriterOfAlicrow/servo,paulrouget/servo,emilio/servo,dati91/servo,eddyb/servo,samfoo/servo,kindersung/servo,mdibaiee/servo,canaltinova/servo,tempbottle/servo,akosel/servo,pyfisch/servo,youprofit/servo,dvberkel/servo,ConnorGBrewster/servo,codemac/servo,GyrosOfWar/servo,nick-thompson/servo,rnestler/servo,tschneidereit/servo,mt2d2/servo,cbrewster/servo,nrc/servo,rnestler/servo,KiChjang/servo,SimonSapin/servo,saneyuki/servo,upsuper/servo,notriddle/servo,peterjoel/servo,boghison/servo,rnestler/servo,A-deLuna/servo,mdibaiee/servo,emilio/servo,mdibaiee/servo,canaltinova/servo,avadacatavra/servo,dati91/servo,zentner-kyle/servo,fiji-flo/servo,eddyb/servo,deokjinkim/servo,youprofit/servo,CJ8664/servo,akosel/servo,g-k/servo,dati91/servo,thiagopnts/servo,steveklabnik/servo,saratang/servo,kindersung/servo,notriddle/servo,pyecs/servo,nrc/servo,pyfisch/servo,splav/servo,dhananjay92/servo,zentner-kyle/servo,upsuper/servo,avadacatavra/servo,fiji-flo/servo,upsuper/servo,A-deLuna/servo,szeged/servo,notriddle/servo,eddyb/servo,paulrouget/servo,ConnorGBrewster/servo,nnethercote/servo,thiagopnts/servo,KiChjang/servo,fiji-flo/servo,mdibaiee/servo,mbrubeck/servo,ryancanhelpyou/servo,DominoTree/servo,j3parker/servo,karlito40/servo,szeged/servo,boghison/servo,tschneidereit/servo,mt2d2/servo,AnthonyBroadCrawford/servo,runarberg/servo,emilio/servo,dhananjay92/servo,saratang/servo,boghison/servo,aweinstock314/servo,karlito40/servo,WriterOfAlicrow/servo,meh/servo,WriterOfAlicrow/servo,aweinstock314/servo,rentongzhang/servo,CJ8664/servo,AnthonyBroadCrawford/servo,wartman4404/servo,jlegendary/servo,samfoo/servo,s142857/servo