fix a crash on invalid caught by the validation tests.
fix a crash on invalid caught by the validation tests.

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