fix recursion error
fix recursion error

atsao72/sympy,pandeyadarsh/sympy,atreyv/sympy,cswiercz/sympy,Titan-C/sympy,Curious72/sympy,kumarkrishna/sympy,jaimahajan1997/sympy,ahhda/sympy,atsao72/sympy,chaffra/sympy,beni55/sympy,ga7g08/sympy,sampadsaha5/sympy,sunny94/temp,liangjiaxing/sympy,MridulS/sympy,moble/sympy,yukoba/sympy,Davidjohnwilson/sympy,souravsingh/sympy,sampadsaha5/sympy,abhiii5459/sympy,mafiya69/sympy,abhiii5459/sympy,Vishluck/sympy,skidzo/sympy,pandeyadarsh/sympy,Sumith1896/sympy,Gadal/sympy,saurabhjn76/sympy,mafiya69/sympy,kmacinnis/sympy,mafiya69/sympy,garvitr/sympy,MechCoder/sympy,Designist/sympy,drufat/sympy,abhiii5459/sympy,chaffra/sympy,sampadsaha5/sympy,rahuldan/sympy,meghana1995/sympy,jamesblunt/sympy,AkademieOlympia/sympy,diofant/diofant,pandeyadarsh/sympy,lidavidm/sympy,Curious72/sympy,garvitr/sympy,kaichogami/sympy,meghana1995/sympy,Vishluck/sympy,sahilshekhawat/sympy,dqnykamp/sympy,lidavidm/sympy,grevutiu-gabriel/sympy,vipulroxx/sympy,Sumith1896/sympy,lidavidm/sympy,kaichogami/sympy,Shaswat27/sympy,madan96/sympy,yashsharan/sympy,jamesblunt/sympy,sahilshekhawat/sympy,sahilshekhawat/sympy,kevalds51/sympy,saurabhjn76/sympy,Titan-C/sympy,yashsharan/sympy,shipci/sympy,pbrady/sympy,shipci/sympy,pbrady/sympy,ChristinaZografou/sympy,cccfran/sympy,asm666/sympy,lindsayad/sympy,farhaanbukhsh/sympy,sunny94/temp,kaichogami/sympy,maniteja123/sympy,jaimahajan1997/sympy,aktech/sympy,grevutiu-gabriel/sympy,garvitr/sympy,wanglongqi/sympy,jbbskinny/sympy,ahhda/sympy,skidzo/sympy,kaushik94/sympy,jerli/sympy,beni55/sympy,Gadal/sympy,kaushik94/sympy,cswiercz/sympy,AunShiLord/sympy,jbbskinny/sympy,abloomston/sympy,jerli/sympy,kmacinnis/sympy,ChristinaZografou/sympy,ChristinaZografou/sympy,drufat/sympy,madan96/sympy,wyom/sympy,shikil/sympy,postvakje/sympy,mcdaniel67/sympy,VaibhavAgarwalVA/sympy,yukoba/sympy,Mitchkoens/sympy,toolforger/sympy,sahmed95/sympy,liangjiaxing/sympy,debugger22/sympy,iamutkarshtiwari/sympy,Arafatk/sympy,bukzor/sympy,skidzo/sympy,Shaswat27/sympy,hrashk/sympy,emon10005/sympy,shikil/sympy,lindsayad/sympy,sunny94/temp,amitjamadagni/sympy,iamutkarshtiwari/sympy,kevalds51/sympy,moble/sympy,kevalds51/sympy,MridulS/sympy,madan96/sympy,saurabhjn76/sympy,wanglongqi/sympy,Designist/sympy,meghana1995/sympy,AkademieOlympia/sympy,ga7g08/sympy,souravsingh/sympy,Davidjohnwilson/sympy,Shaswat27/sympy,toolforger/sympy,ga7g08/sympy,yashsharan/sympy,Titan-C/sympy,Mitchkoens/sympy,Sumith1896/sympy,cccfran/sympy,maniteja123/sympy,dqnykamp/sympy,postvakje/sympy,MechCoder/sympy,Mitchkoens/sympy,hargup/sympy,Arafatk/sympy,hargup/sympy,hrashk/sympy,shipci/sympy,Gadal/sympy,Arafatk/sympy,kumarkrishna/sympy,atreyv/sympy,bukzor/sympy,jamesblunt/sympy,AunShiLord/sympy,emon10005/sympy,hargup/sympy,Designist/sympy,lindsayad/sympy,hrashk/sympy,cccfran/sympy,toolforger/sympy,oliverlee/sympy,skirpichev/omg,kumarkrishna/sympy,yukoba/sympy,liangjiaxing/sympy,oliverlee/sympy,Davidjohnwilson/sympy,wyom/sympy,VaibhavAgarwalVA/sympy,VaibhavAgarwalVA/sympy,farhaanbukhsh/sympy,rahuldan/sympy,drufat/sympy,emon10005/sympy,rahuldan/sympy,sahmed95/sympy,atsao72/sympy,shikil/sympy,MechCoder/sympy,farhaanbukhsh/sympy,mcdaniel67/sympy,bukzor/sympy,kaushik94/sympy,pbrady/sympy,jerli/sympy,amitjamadagni/sympy,Curious72/sympy,chaffra/sympy,debugger22/sympy,souravsingh/sympy,sahmed95/sympy,abloomston/sympy,asm666/sympy,debugger22/sympy,vipulroxx/sympy,wyom/sympy,wanglongqi/sympy,moble/sympy,AunShiLord/sympy,jaimahajan1997/sympy,vipulroxx/sympy,Vishluck/sympy,MridulS/sympy,mcdaniel67/sympy,aktech/sympy,ahhda/sympy,aktech/sympy,asm666/sympy,oliverlee/sympy,iamutkarshtiwari/sympy,maniteja123/sympy,jbbskinny/sympy,atreyv/sympy,abloomston/sympy,grevutiu-gabriel/sympy,AkademieOlympia/sympy,cswiercz/sympy,beni55/sympy,dqnykamp/sympy,kmacinnis/sympy,postvakje/sympy