IRGen: WitnessTableEntry::isFunction() shouldn't crash if its not a function
IRGen: WitnessTableEntry::isFunction() shouldn't crash if its not a function

practicalswift/swift,JGiola/swift,CodaFi/swift,atrick/swift,amraboelela/swift,practicalswift/swift,austinzheng/swift,JGiola/swift,shajrawi/swift,devincoughlin/swift,practicalswift/swift,harlanhaskins/swift,sschiau/swift,gribozavr/swift,shahmishal/swift,austinzheng/swift,shajrawi/swift,ahoppen/swift,ahoppen/swift,amraboelela/swift,tkremenek/swift,devincoughlin/swift,nathawes/swift,xedin/swift,natecook1000/swift,karwa/swift,hooman/swift,tkremenek/swift,aschwaighofer/swift,apple/swift,ahoppen/swift,devincoughlin/swift,lorentey/swift,gregomni/swift,aschwaighofer/swift,danielmartin/swift,shahmishal/swift,rudkx/swift,parkera/swift,shahmishal/swift,austinzheng/swift,xwu/swift,roambotics/swift,xwu/swift,gribozavr/swift,gribozavr/swift,xwu/swift,stephentyrone/swift,austinzheng/swift,devincoughlin/swift,amraboelela/swift,harlanhaskins/swift,harlanhaskins/swift,glessard/swift,gribozavr/swift,ahoppen/swift,glessard/swift,practicalswift/swift,shajrawi/swift,parkera/swift,karwa/swift,jmgc/swift,parkera/swift,hooman/swift,roambotics/swift,practicalswift/swift,jmgc/swift,gribozavr/swift,alblue/swift,apple/swift,tkremenek/swift,natecook1000/swift,alblue/swift,alblue/swift,atrick/swift,alblue/swift,sschiau/swift,karwa/swift,sschiau/swift,stephentyrone/swift,hooman/swift,JGiola/swift,airspeedswift/swift,xwu/swift,roambotics/swift,jckarter/swift,gregomni/swift,xedin/swift,danielmartin/swift,xwu/swift,jmgc/swift,atrick/swift,apple/swift,benlangmuir/swift,karwa/swift,roambotics/swift,lorentey/swift,airspeedswift/swift,austinzheng/swift,glessard/swift,natecook1000/swift,parkera/swift,rudkx/swift,hooman/swift,jckarter/swift,rudkx/swift,sschiau/swift,aschwaighofer/swift,sschiau/swift,parkera/swift,nathawes/swift,xedin/swift,karwa/swift,lorentey/swift,ahoppen/swift,apple/swift,rudkx/swift,allevato/swift,allevato/swift,xedin/swift,natecook1000/swift,natecook1000/swift,atrick/swift,lorentey/swift,JGiola/swift,alblue/swift,lorentey/swift,JGiola/swift,stephentyrone/swift,CodaFi/swift,brentdax/swift,amraboelela/swift,airspeedswift/swift,roambotics/swift,natecook1000/swift,harlanhaskins/swift,xedin/swift,allevato/swift,parkera/swift,benlangmuir/swift,alblue/swift,ahoppen/swift,lorentey/swift,allevato/swift,benlangmuir/swift,shahmishal/swift,amraboelela/swift,shahmishal/swift,aschwaighofer/swift,stephentyrone/swift,harlanhaskins/swift,tkremenek/swift,airspeedswift/swift,sschiau/swift,airspeedswift/swift,allevato/swift,karwa/swift,devincoughlin/swift,stephentyrone/swift,airspeedswift/swift,gribozavr/swift,shahmishal/swift,brentdax/swift,danielmartin/swift,gribozavr/swift,jckarter/swift,jmgc/swift,gregomni/swift,harlanhaskins/swift,shahmishal/swift,devincoughlin/swift,practicalswift/swift,aschwaighofer/swift,aschwaighofer/swift,tkremenek/swift,CodaFi/swift,shajrawi/swift,lorentey/swift,devincoughlin/swift,parkera/swift,shajrawi/swift,benlangmuir/swift,xedin/swift,benlangmuir/swift,danielmartin/swift,harlanhaskins/swift,xedin/swift,alblue/swift,tkremenek/swift,gregomni/swift,austinzheng/swift,karwa/swift,shajrawi/swift,parkera/swift,gregomni/swift,practicalswift/swift,JGiola/swift,sschiau/swift,karwa/swift,xwu/swift,sschiau/swift,devincoughlin/swift,rudkx/swift,natecook1000/swift,jmgc/swift,atrick/swift,rudkx/swift,stephentyrone/swift,danielmartin/swift,glessard/swift,brentdax/swift,apple/swift,brentdax/swift,nathawes/swift,hooman/swift,hooman/swift,amraboelela/swift,CodaFi/swift,CodaFi/swift,shajrawi/swift,xwu/swift,benlangmuir/swift,amraboelela/swift,CodaFi/swift,roambotics/swift,gribozavr/swift,danielmartin/swift,jckarter/swift,gregomni/swift,nathawes/swift,practicalswift/swift,allevato/swift,shahmishal/swift,aschwaighofer/swift,brentdax/swift,apple/swift,jckarter/swift,lorentey/swift,CodaFi/swift,tkremenek/swift,glessard/swift,xedin/swift,nathawes/swift,nathawes/swift,jckarter/swift,shajrawi/swift,atrick/swift,nathawes/swift,hooman/swift,airspeedswift/swift,allevato/swift,danielmartin/swift,jckarter/swift,jmgc/swift,glessard/swift,stephentyrone/swift,brentdax/swift,brentdax/swift,jmgc/swift,austinzheng/swift