check pspace always receives symbol
check pspace always receives symbol

This is a common fail-point for poorly behaved SymPy Expr code.

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