add a hackaround for rdar://15753317.  I don't unerstand the code enough to tell if this is the right fix.
add a hackaround for rdar://15753317.  I don't unerstand the code enough to tell if this is the right fix.


Swift SVN r11927

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