Assertion: Avoid endless loop in case of circular class inheritance.
Assertion: Avoid endless loop in case of circular class inheritance.

This commit does not solve the root cause (incomplete circularity detection), see FIXME.

kstaring/swift,benlangmuir/swift,hooman/swift,tinysun212/swift-windows,shajrawi/swift,airspeedswift/swift,ken0nek/swift,allevato/swift,bitjammer/swift,therealbnut/swift,codestergit/swift,calebd/swift,johnno1962d/swift,alblue/swift,sschiau/swift,brentdax/swift,tardieu/swift,IngmarStein/swift,gottesmm/swift,karwa/swift,KrishMunot/swift,airspeedswift/swift,jckarter/swift,CodaFi/swift,frootloops/swift,shahmishal/swift,gottesmm/swift,allevato/swift,nathawes/swift,jtbandes/swift,kperryua/swift,ahoppen/swift,shahmishal/swift,zisko/swift,amraboelela/swift,devincoughlin/swift,practicalswift/swift,jtbandes/swift,johnno1962d/swift,airspeedswift/swift,atrick/swift,zisko/swift,uasys/swift,tkremenek/swift,stephentyrone/swift,codestergit/swift,felix91gr/swift,hughbe/swift,slavapestov/swift,karwa/swift,shajrawi/swift,harlanhaskins/swift,calebd/swift,shajrawi/swift,hughbe/swift,ken0nek/swift,OscarSwanros/swift,adrfer/swift,kperryua/swift,arvedviehweger/swift,KrishMunot/swift,return/swift,IngmarStein/swift,glessard/swift,gmilos/swift,danielmartin/swift,nathawes/swift,lorentey/swift,xedin/swift,aschwaighofer/swift,felix91gr/swift,slavapestov/swift,milseman/swift,shajrawi/swift,CodaFi/swift,IngmarStein/swift,uasys/swift,jopamer/swift,deyton/swift,ben-ng/swift,KrishMunot/swift,allevato/swift,arvedviehweger/swift,huonw/swift,adrfer/swift,tkremenek/swift,uasys/swift,shahmishal/swift,practicalswift/swift,xwu/swift,austinzheng/swift,aschwaighofer/swift,kstaring/swift,slavapestov/swift,calebd/swift,Jnosh/swift,xedin/swift,harlanhaskins/swift,adrfer/swift,OscarSwanros/swift,therealbnut/swift,bitjammer/swift,practicalswift/swift,ben-ng/swift,felix91gr/swift,gregomni/swift,sschiau/swift,apple/swift,therealbnut/swift,tkremenek/swift,tkremenek/swift,frootloops/swift,jtbandes/swift,return/swift,zisko/swift,tjw/swift,benlangmuir/swift,danielmartin/swift,djwbrown/swift,harlanhaskins/swift,danielmartin/swift,alblue/swift,jmgc/swift,ben-ng/swift,kstaring/swift,allevato/swift,russbishop/swift,stephentyrone/swift,tkremenek/swift,xwu/swift,OscarSwanros/swift,Jnosh/swift,return/swift,devincoughlin/swift,codestergit/swift,hughbe/swift,tjw/swift,rudkx/swift,karwa/swift,jckarter/swift,russbishop/swift,codestergit/swift,gribozavr/swift,parkera/swift,jckarter/swift,JGiola/swift,gribozavr/swift,CodaFi/swift,JGiola/swift,glessard/swift,xwu/swift,huonw/swift,tardieu/swift,zisko/swift,modocache/swift,dduan/swift,gregomni/swift,SwiftAndroid/swift,benlangmuir/swift,gottesmm/swift,danielmartin/swift,devincoughlin/swift,sschiau/swift,brentdax/swift,manavgabhawala/swift,modocache/swift,felix91gr/swift,kstaring/swift,gottesmm/swift,manavgabhawala/swift,devincoughlin/swift,austinzheng/swift,austinzheng/swift,manavgabhawala/swift,modocache/swift,JGiola/swift,gottesmm/swift,hooman/swift,alblue/swift,Jnosh/swift,johnno1962d/swift,calebd/swift,aschwaighofer/swift,stephentyrone/swift,kstaring/swift,harlanhaskins/swift,jmgc/swift,dduan/swift,rudkx/swift,parkera/swift,codestergit/swift,SwiftAndroid/swift,tkremenek/swift,tjw/swift,karwa/swift,adrfer/swift,bitjammer/swift,manavgabhawala/swift,xedin/swift,allevato/swift,lorentey/swift,dreamsxin/swift,djwbrown/swift,JaSpa/swift,lorentey/swift,swiftix/swift,jopamer/swift,adrfer/swift,manavgabhawala/swift,gmilos/swift,nathawes/swift,jckarter/swift,natecook1000/swift,alblue/swift,parkera/swift,jckarter/swift,tardieu/swift,stephentyrone/swift,brentdax/swift,return/swift,arvedviehweger/swift,ahoppen/swift,devincoughlin/swift,SwiftAndroid/swift,sschiau/swift,apple/swift,tjw/swift,glessard/swift,nathawes/swift,kperryua/swift,Jnosh/swift,adrfer/swift,huonw/swift,deyton/swift,lorentey/swift,jtbandes/swift,nathawes/swift,kperryua/swift,gribozavr/swift,karwa/swift,calebd/swift,swiftix/swift,aschwaighofer/swift,deyton/swift,xedin/swift,OscarSwanros/swift,shahmishal/swift,JaSpa/swift,stephentyrone/swift,practicalswift/swift,xwu/swift,frootloops/swift,deyton/swift,gottesmm/swift,stephentyrone/swift,jopamer/swift,russbishop/swift,gregomni/swift,hughbe/swift,IngmarStein/swift,swiftix/swift,xedin/swift,jmgc/swift,gribozavr/swift,zisko/swift,russbishop/swift,gribozavr/swift,glessard/swift,swiftix/swift,huonw/swift,SwiftAndroid/swift,arvedviehweger/swift,shajrawi/swift,swiftix/swift,dduan/swift,jopamer/swift,felix91gr/swift,harlanhaskins/swift,SwiftAndroid/swift,apple/swift,roambotics/swift,hughbe/swift,parkera/swift,roambotics/swift,rudkx/swift,xedin/swift,jmgc/swift,swiftix/swift,frootloops/swift,therealbnut/swift,CodaFi/swift,huonw/swift,jckarter/swift,natecook1000/swift,adrfer/swift,russbishop/swift,ken0nek/swift,airspeedswift/swift,tardieu/swift,CodaFi/swift,arvedviehweger/swift,milseman/swift,jtbandes/swift,jopamer/swift,glessard/swift,CodaFi/swift,jmgc/swift,roambotics/swift,SwiftAndroid/swift,shajrawi/swift,tjw/swift,allevato/swift,KrishMunot/swift,nathawes/swift,modocache/swift,atrick/swift,slavapestov/swift,jmgc/swift,natecook1000/swift,sschiau/swift,tinysun212/swift-windows,huonw/swift,KrishMunot/swift,karwa/swift,amraboelela/swif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