[NFC] Add a test for constraint generation failures in a pattern binding decl inside of a function builder.
[NFC] Add a test for constraint generation failures in a pattern binding
decl inside of a function builder.

nathawes/swift,CodaFi/swift,rudkx/swift,benlangmuir/swift,CodaFi/swift,hooman/swift,ahoppen/swift,allevato/swift,tkremenek/swift,roambotics/swift,CodaFi/swift,airspeedswift/swift,xwu/swift,jckarter/swift,JGiola/swift,jmgc/swift,jckarter/swift,nathawes/swift,apple/swift,apple/swift,parkera/swift,glessard/swift,stephentyrone/swift,CodaFi/swift,stephentyrone/swift,hooman/swift,JGiola/swift,tkremenek/swift,stephentyrone/swift,jmgc/swift,xwu/swift,gregomni/swift,gregomni/swift,rudkx/swift,allevato/swift,allevato/swift,JGiola/swift,roambotics/swift,parkera/swift,atrick/swift,tkremenek/swift,benlangmuir/swift,nathawes/swift,airspeedswift/swift,airspeedswift/swift,tkremenek/swift,rudkx/swift,stephentyrone/swift,rudkx/swift,nathawes/swift,parkera/swift,allevato/swift,parkera/swift,jckarter/swift,hooman/swift,apple/swift,parkera/swift,jmgc/swift,xwu/swift,jckarter/swift,xwu/swift,xwu/swift,airspeedswift/swift,tkremenek/swift,jmgc/swift,glessard/swift,hooman/swift,roambotics/swift,jmgc/swift,glessard/swift,nathawes/swift,benlangmuir/swift,tkremenek/swift,JGiola/swift,ahoppen/swift,stephentyrone/swift,atrick/swift,atrick/swift,allevato/swift,airspeedswift/swift,rudkx/swift,xwu/swift,glessard/swift,parkera/swift,CodaFi/swift,parkera/swift,JGiola/swift,xwu/swift,tkremenek/swift,atrick/swift,parkera/swift,CodaFi/swift,glessard/swift,nathawes/swift,benlangmuir/swift,jckarter/swift,airspeedswift/swift,rudkx/swift,allevato/swift,jckarter/swift,hooman/swift,stephentyrone/swift,gregomni/swift,jckarter/swift,gregomni/swift,nathawes/swift,JGiola/swift,benlangmuir/swift,jmgc/swift,stephentyrone/swift,ahoppen/swift,hooman/swift,gregomni/swift,atrick/swift,apple/swift,roambotics/swift,apple/swift,ahoppen/swift,benlangmuir/swift,roambotics/swift,airspeedswift/swift,roambotics/swift,CodaFi/swift,glessard/swift,ahoppen/swift,hooman/swift,jmgc/swift,gregomni/swift,apple/swift,atrick/swift,ahoppen/swift,allevato/swift