Removed sources of panic from piepline.rs.
Removed sources of panic from piepline.rs.

splav/servo,nnethercote/servo,nnethercote/servo,larsbergstrom/servo,notriddle/servo,mattnenterprise/servo,szeged/servo,nnethercote/servo,mattnenterprise/servo,fiji-flo/servo,peterjoel/servo,paulrouget/servo,mbrubeck/servo,saneyuki/servo,fiji-flo/servo,szeged/servo,jimberlage/servo,eddyb/servo,saneyuki/servo,ConnorGBrewster/servo,emilio/servo,nrc/servo,CJ8664/servo,szeged/servo,fiji-flo/servo,mattnenterprise/servo,anthgur/servo,thiagopnts/servo,CJ8664/servo,mattnenterprise/servo,szeged/servo,CJ8664/servo,larsbergstrom/servo,upsuper/servo,larsbergstrom/servo,notriddle/servo,peterjoel/servo,splav/servo,splav/servo,DominoTree/servo,splav/servo,saneyuki/servo,thiagopnts/servo,jimberlage/servo,KiChjang/servo,eddyb/servo,sadmansk/servo,dati91/servo,anthgur/servo,cbrewster/servo,CJ8664/servo,eddyb/servo,DominoTree/servo,pyfisch/servo,eddyb/servo,anthgur/servo,peterjoel/servo,paulrouget/servo,fiji-flo/servo,DominoTree/servo,paulrouget/servo,sadmansk/servo,mbrubeck/servo,avadacatavra/servo,nrc/servo,ConnorGBrewster/servo,DominoTree/servo,ConnorGBrewster/servo,eddyb/servo,szeged/servo,cbrewster/servo,SimonSapin/servo,KiChjang/servo,saneyuki/servo,peterjoel/servo,dati91/servo,fiji-flo/servo,jimberlage/servo,dsandeephegde/servo,paulrouget/servo,nrc/servo,steveklabnik/servo,notriddle/servo,canaltinova/servo,cbrewster/servo,DominoTree/servo,nrc/servo,emilio/servo,anthgur/servo,eddyb/servo,peterjoel/servo,avadacatavra/servo,upsuper/servo,CJ8664/servo,dsandeephegde/servo,dsandeephegde/servo,upsuper/servo,larsbergstrom/servo,peterjoel/servo,CJ8664/servo,avadacatavra/servo,nnethercote/servo,notriddle/servo,rnestler/servo,pyfisch/servo,dati91/servo,thiagopnts/servo,anthgur/servo,splav/servo,mbrubeck/servo,nnethercote/servo,szeged/servo,peterjoel/servo,nnethercote/servo,rnestler/servo,szeged/servo,sadmansk/servo,mbrubeck/servo,mbrubeck/servo,mbrubeck/servo,notriddle/servo,emilio/servo,DominoTree/servo,KiChjang/servo,ConnorGBrewster/servo,cbrewster/servo,fiji-flo/servo,KiChjang/servo,avadacatavra/servo,SimonSapin/servo,notriddle/servo,rnestler/servo,saneyuki/servo,paulrouget/servo,splav/servo,paulrouget/servo,cbrewster/servo,nrc/servo,nnethercote/servo,pyfisch/servo,upsuper/servo,dsandeephegde/servo,nnethercote/servo,emilio/servo,larsbergstrom/servo,notriddle/servo,szeged/servo,upsuper/servo,upsuper/servo,emilio/servo,sadmansk/servo,steveklabnik/servo,nrc/servo,szeged/servo,sadmansk/servo,dati91/servo,ConnorGBrewster/servo,ConnorGBrewster/servo,canaltinova/servo,jimberlage/servo,canaltinova/servo,canaltinova/servo,mattnenterprise/servo,sadmansk/servo,steveklabnik/servo,canaltinova/servo,jimberlage/servo,thiagopnts/servo,upsuper/servo,ConnorGBrewster/servo,SimonSapin/servo,CJ8664/servo,saneyuki/servo,avadacatavra/servo,upsuper/servo,canaltinova/servo,anthgur/servo,DominoTree/servo,mbrubeck/servo,nnethercote/servo,dsandeephegde/servo,fiji-flo/servo,steveklabnik/servo,DominoTree/servo,cbrewster/servo,dsandeephegde/servo,larsbergstrom/servo,KiChjang/servo,notriddle/servo,peterjoel/servo,nrc/servo,avadacatavra/servo,avadacatavra/servo,saneyuki/servo,emilio/servo,rnestler/servo,SimonSapin/servo,KiChjang/servo,thiagopnts/servo,rnestler/servo,pyfisch/servo,jimberlage/servo,jimberlage/servo,cbrewster/servo,fiji-flo/servo,sadmansk/servo,dati91/servo,eddyb/servo,paulrouget/servo,paulrouget/servo,SimonSapin/servo,steveklabnik/servo,mattnenterprise/servo,thiagopnts/servo,larsbergstrom/servo,emilio/servo,thiagopnts/servo,CJ8664/servo,canaltinova/servo,pyfisch/servo,cbrewster/servo,SimonSapin/servo,splav/servo,steveklabnik/servo,KiChjang/servo,larsbergstrom/servo,peterjoel/servo,SimonSapin/servo,steveklabnik/servo,KiChjang/servo,pyfisch/servo,splav/servo,larsbergstrom/servo,saneyuki/servo,SimonSapin/servo,dati91/servo,rnestler/servo,DominoTree/servo,jimberlage/servo,eddyb/servo,sadmansk/servo,canaltinova/servo,notriddle/servo,rnestler/servo,avadacatavra/servo,pyfisch/servo,anthgur/servo,KiChjang/servo,pyfisch/servo,ConnorGBrewster/servo,mattnenterprise/servo,emilio/servo,pyfisch/servo,dsandeephegde/servo,nnethercote/servo,emilio/servo,dati91/servo,larsbergstrom/servo,peterjoel/servo,pyfisch/servo,notriddle/servo,paulrouget/servo,dati91/servo,dsandeephegde/servo,emilio/servo,KiChjang/servo,rnestler/servo,paulrouget/servo,splav/servo,saneyuki/servo,saneyuki/servo,mattnenterprise/servo,jimberlage/servo,anthgur/servo,splav/servo,mbrubeck/servo,thiagopnts/servo,szeged/servo,DominoTree/servo