Sema: Don't crash checking null conformance if ObjC conformance fails.
Sema: Don't crash checking null conformance if ObjC conformance fails.

Swift SVN r5679

IngmarStein/swift,kentya6/swift,lorentey/swift,felix91gr/swift,SwiftAndroid/swift,shahmishal/swift,huonw/swift,felix91gr/swift,aschwaighofer/swift,hooman/swift,jmgc/swift,hughbe/swift,codestergit/swift,manavgabhawala/swift,swiftix/swift.old,shajrawi/swift,dduan/swift,kentya6/swift,jopamer/swift,lorentey/swift,emilstahl/swift,kusl/swift,swiftix/swift.old,hughbe/swift,nathawes/swift,cbrentharris/swift,ahoppen/swift,codestergit/swift,IngmarStein/swift,mightydeveloper/swift,zisko/swift,apple/swift,parkera/swift,modocache/swift,swiftix/swift.old,practicalswift/swift,russbishop/swift,kusl/swift,ben-ng/swift,adrfer/swift,SwiftAndroid/swift,johnno1962d/swift,swiftix/swift.old,benlangmuir/swift,Jnosh/swift,amraboelela/swift,return/swift,lorentey/swift,manavgabhawala/swift,gribozavr/swift,tardieu/swift,swiftix/swift.old,sschiau/swift,slavapestov/swift,allevato/swift,practicalswift/swift,khizkhiz/swift,MukeshKumarS/Swift,jtbandes/swift,brentdax/swift,modocache/swift,airspeedswift/swift,bitjammer/swift,sdulal/swift,OscarSwanros/swift,tinysun212/swift-windows,gottesmm/swift,alblue/swift,JGiola/swift,johnno1962d/swift,therealbnut/swift,harlanhaskins/swift,CodaFi/swift,natecook1000/swift,atrick/swift,practicalswift/swift,aschwaighofer/swift,gmilos/swift,kstaring/swift,adrfer/swift,Ivacker/swift,manavgabhawala/swift,kstaring/swift,shajrawi/swift,emilstahl/swift,mightydeveloper/swift,felix91gr/swift,russbishop/swift,Jnosh/swift,gregomni/swift,karwa/swift,JaSpa/swift,atrick/swift,allevato/swift,calebd/swift,KrishMunot/swift,frootloops/swift,LeoShimonaka/swift,johnno1962d/swift,slavapestov/swift,uasys/swift,ahoppen/swift,ahoppen/swift,danielmartin/swift,emilstahl/swift,devincoughlin/swift,tjw/swift,kusl/swift,xedin/swift,jmgc/swift,LeoShimonaka/swift,MukeshKumarS/Swift,tjw/swift,gmilos/swift,russbishop/swift,kstaring/swift,glessard/swift,gottesmm/swift,JaSpa/swift,devincoughlin/swift,nathawes/swift,danielmartin/swift,amraboelela/swift,JaSpa/swift,Ivacker/swift,mightydeveloper/swift,jtbandes/swift,harlanhaskins/swift,brentdax/swift,apple/swift,ben-ng/swift,allevato/swift,Jnosh/swift,deyton/swift,brentdax/swift,djwbrown/swift,xedin/swift,cbrentharris/swift,tardieu/swift,MukeshKumarS/Swift,swiftix/swift.old,airspeedswift/swift,parkera/swift,emilstahl/swift,ben-ng/swift,devincoughlin/swift,kperryua/swift,dduan/swift,slavapestov/swift,khizkhiz/swift,austinzheng/swift,dduan/swift,brentdax/swift,zisko/swift,djwbrown/swift,zisko/swift,allevato/swift,Ivacker/swift,xwu/swift,gribozavr/swift,glessard/swift,SwiftAndroid/swift,roambotics/swift,djwbrown/swift,Jnosh/swift,xedin/swift,benlangmuir/swift,parkera/swift,calebd/swift,jtbandes/swift,gribozavr/swift,calebd/swift,calebd/swift,johnno1962d/swift,devincoughlin/swift,shajrawi/swift,djwbrown/swift,jmgc/swift,felix91gr/swift,deyton/swift,ben-ng/swift,Ivacker/swift,cbrentharris/swift,ahoppen/swift,gmilos/swift,stephentyrone/swift,tkremenek/swift,harlanhaskins/swift,karwa/swift,huonw/swift,xedin/swift,brentdax/swift,austinzheng/swift,benlangmuir/swift,glessard/swift,apple/swift,allevato/swift,shahmishal/swift,stephentyrone/swift,kusl/swift,shajrawi/swift,kstaring/swift,arvedviehweger/swift,uasys/swift,jckarter/swift,glessard/swift,rudkx/swift,felix91gr/swift,Jnosh/swift,ahoppen/swift,amraboelela/swift,KrishMunot/swift,bitjammer/swift,modocache/swift,jtbandes/swift,hooman/swift,tardieu/swift,sdulal/swift,tkremenek/swift,alblue/swift,shahmishal/swift,glessard/swift,russbishop/swift,sdulal/swift,CodaFi/swift,rudkx/swift,cbrentharris/swift,Jnosh/swift,kstaring/swift,mightydeveloper/swift,LeoShimonaka/swift,MukeshKumarS/Swift,emilstahl/swift,sschiau/swift,bitjammer/swift,bitjammer/swift,milseman/swift,austinzheng/swift,austinzheng/swift,parkera/swift,hooman/swift,jopamer/swift,ken0nek/swift,Ivacker/swift,gottesmm/swift,SwiftAndroid/swift,johnno1962d/swift,KrishMunot/swift,return/swift,codestergit/swift,tinysun212/swift-windows,emilstahl/swift,dduan/swift,therealbnut/swift,glessard/swift,mightydeveloper/swift,frootloops/swift,swiftix/swift,gottesmm/swift,emilstahl/swift,roambotics/swift,tinysun212/swift-windows,airspeedswift/swift,nathawes/swift,alblue/swift,natecook1000/swift,practicalswift/swift,dduan/swift,kentya6/swift,modocache/swift,alblue/swift,KrishMunot/swift,rudkx/swift,sdulal/swift,jckarter/swift,slavapestov/swift,tjw/swift,deyton/swift,sschiau/swift,gregomni/swift,CodaFi/swift,jmgc/swift,shajrawi/swift,shahmishal/swift,shahmishal/swift,MukeshKumarS/Swift,adrfer/swift,nathawes/swift,djwbrown/swift,felix91gr/swift,stephentyrone/swift,milseman/swift,Ivacker/swift,roambotics/swift,zisko/swift,deyton/swift,jtbandes/swift,ken0nek/swift,harlanhaskins/swift,CodaFi/swift,xwu/swift,gottesmm/swift,khizkhiz/swift,russbishop/swift,russbishop/swift,harlanhaskins/swift,mightydeveloper/swift,benlangmuir/swift,milseman/swift,deyton/swift,milseman/swift,calebd/swift,cbrentharris/swift,SwiftAndroid/swift,CodaFi/swift,hughbe/swift,KrishMunot/swift,roambotics/swift,IngmarStein/swift,cbrentharris/swift,milseman/swift,gottesmm/swift,alblue/swift,slavapestov/swift,milseman/swift,kentya6/swift,brentdax/swift,gregomni/swift,jopamer/swift,danielmartin/swift,practicalswift/swift,swiftix/swift.old,djwbrown/swift,hughbe/swift,natecook1000/swift,nathawes/swift,ken0nek/swift,cbrentharris/swift,huonw/swift,austinzheng/swift,JGiola/swift,airspeedswift/swift,therealbnut/swift,airspeedswift/swift,danielmartin/swift,hooman/swift,jckarter/swift,tinysun212/swift-windows,airspeedswift/swift,gribozavr/swift,nathawes/swift,arvedviehweger/swift,MukeshKumarS/Swift,therealbnut/swift,tkremenek/swift,codestergit/swift,JGiola/swift,allevato/swift,JGiola/swift,stephentyrone/swift,arvedviehweger/swift,mightydeveloper/swift,dreamsxin/swift,swiftix/swift,jopamer/swift,xwu/swift,gribozavr/swift,xwu/swift,shahmishal/swift,sdulal/swift,huonw/swift,tardieu/swift,xedin/swift,adrfer/swift,jopamer/swift,ahoppen/swift,stephentyrone/swift,airspeedswift/swift,alblue/swift,karwa/swift,adrfer/swift,brentdax/swift,LeoShimonaka/swift,IngmarStein/swift,swiftix/swift,sschiau/swift,allevato/swift,karwa/swift,hooman/swift,codestergit/swift,sschiau/swift,amraboelela/swift,ken0nek/swift,jckarter/swift,sdulal/swift,aschwaighofer/swift,gregomni/swift,deyton/swift,johnno1962d/swift,swiftix/swift,kperryua/swift,manavgabhawala/swift,tardieu/swift,practicalswift/swift,JaSpa/swift,rudkx/swift,return/swift,karwa/swift,karwa/swift,dduan/swift,rudkx/swift,LeoShimonaka/swift,MukeshKumarS/Swift,tjw/swift,khizkhiz/swift,shajrawi/swift,parkera/swift,KrishMunot/swift,manavgabhawala/swift,codestergit/swift,cbrentharris/swift,arvedviehweger/swift,therealbnut/swift,shajrawi/swift,bitjammer/swift,uasys/swift,jckarter/swift,sschiau/swift,roambotics/swift,KrishMunot/swift,apple/swift,hooman/swift,LeoShimonaka/swift,arvedviehweger/swift,hughbe/swift,slavapestov/swift,russbishop/swift,aschwaighofer/swift,karwa/swift,austinzheng/swift,return/swift,OscarSwanros/swift,karwa/swift,kentya6/swift,jtbandes/swift,xwu/swift,OscarSwanros/swift,amraboelela/swift,atrick/swift,amraboelela/swift,calebd/swift,JaSpa/swift,LeoShimonaka/swift,natecook1000/swift,xedin/swift,austinzheng/swift,gribozavr/swift,gottesmm/swift,kusl/swift,khizkhiz/swift,arvedviehweger/swift,khizkhiz/swift,aschwaighofer/swift,benlangmuir/swift,JaSpa/swift,natecook1000/swift,danielmartin/swift,parkera/swift,apple/swift,roambotics/swift,sschiau/swift,therealbnut/swift,tkremenek/swift,IngmarStein/swift,benlangmuir/swift,stephentyrone/swift,alblue/swift,therealbnut/swift,kperryua/swift,xwu/swift,jmgc/swift,tkremenek/swift,atrick/swift,JaSpa/swift,apple/swift,khizkhiz/swift,uasys/swift,devincoughlin/swift,Jnosh/swift,shahmishal/swift,frootloops/swift,uasys/swift,kusl/swift,manavgabhawala/swift,atrick/swift,JGiola/swift,huonw/swift,danielmartin/swift,modocache/swift,CodaFi/swift,kperryua/swift,sdulal/swift,felix91gr/swift,xedin/swift,frootloops/swift,ken0nek/swift,gregomni/swift,huonw/swift,huonw/swift,devincoughlin/swift,harlanhaskins/swift,gribozavr/swift,gregomni/swift,tinysun212/swift-windows,lorentey/swift,uasys/swift,aschwaighofer/swift,kperryua/swift,swiftix/swift,devincoughlin/swift,modocache/swift,tardieu/swift,deyton/swift,adrfer/swift,IngmarStein/swift,lorentey/swift,harlanhaskins/swift,danielmartin/swift,gmilos/swift,shahmishal/swift,return/swift,hughbe/swift,bitjammer/swift,codestergit/swift,tjw/swift,devincoughlin/swift,frootloops/swift,kusl/swift,CodaFi/swift,mightydeveloper/swift,gmilos/swift,JGiola/swift,tkremenek/swift,manavgabhawala/swift,sschiau/swift,gmilos/swift,practicalswift/swift,ben-ng/swift,Ivacker/swift,johnno1962d/swift,milseman/swift,dreamsxin/swift,kperryua/swift,hooman/swift,ben-ng/swift,calebd/swift,amraboelela/swift,ben-ng/swift,kusl/swift,dduan/swift,OscarSwanros/swift,OscarSwanros/swift,practicalswift/swift,bitjammer/swift,IngmarStein/swift,swiftix/swift,parkera/swift,kperryua/swift,SwiftAndroid/swift,Ivacker/swift,emilstahl/swift,swiftix/swift,SwiftAndroid/swift,LeoShimonaka/swift,natecook1000/swift,hughbe/swift,xedin/swift,slavapestov/swift,tinysun212/swift-windows,lorentey/swift,kstaring/swift,jckarter/swift,gmilos/swift,uasys/swift,tjw/swift,djwbrown/swift,tkremenek/swift,aschwaighofer/swift,jopamer/swift,shajrawi/swift,kentya6/swift,tardieu/swift,ken0nek/swift,gribozavr/swift,tjw/swift,ken0nek/swift,kstaring/swift,jtbandes/swift,zisko/swift,kentya6/swift,nathawes/swift,adrfer/swift,OscarSwanros/swift,parkera/swift,natecook1000/swift,jckarter/swift,frootloops/swift,tinysun212/swift-windows,zisko/swift,OscarSwanros/swift,frootloops/swift,return/swift,stephentyrone/swift,return/swift,sdulal/swift,modocache/swift,xwu/swift,lorentey/swift,jmgc/swift,swiftix/swift.old,atrick/swift,jopamer/swift,kentya6/swift,lorentey/swift,rudkx/swift,arvedviehweger/swift,jmgc/swift,zisko/swift