Propagate error types out of specialized conformances.
Propagate error types out of specialized conformances.

Fixes rdar://problem/21598514.

Swift SVN r29809

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