Debug info: add a test for rdar://problem/16990007.
Debug info: add a test for rdar://problem/16990007.

Swift SVN r21426

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