[stdlib] Disambiguate a subscript operation.
[stdlib] Disambiguate a subscript operation.

This is only flagged by some type checker changes that I have, but it
appears to be a legitimate ambiguity.

frootloops/swift,milseman/swift,amraboelela/swift,nathawes/swift,stephentyrone/swift,frootloops/swift,tjw/swift,ahoppen/swift,swiftix/swift,allevato/swift,deyton/swift,jckarter/swift,OscarSwanros/swift,tkremenek/swift,danielmartin/swift,xedin/swift,devincoughlin/swift,jtbandes/swift,hooman/swift,tjw/swift,xwu/swift,devincoughlin/swift,aschwaighofer/swift,practicalswift/swift,aschwaighofer/swift,atrick/swift,apple/swift,danielmartin/swift,return/swift,djwbrown/swift,jopamer/swift,Jnosh/swift,felix91gr/swift,zisko/swift,lorentey/swift,roambotics/swift,karwa/swift,karwa/swift,airspeedswift/swift,gribozavr/swift,shahmishal/swift,djwbrown/swift,calebd/swift,uasys/swift,xwu/swift,xedin/swift,atrick/swift,jopamer/swift,karwa/swift,brentdax/swift,CodaFi/swift,CodaFi/swift,OscarSwanros/swift,brentdax/swift,glessard/swift,gregomni/swift,hughbe/swift,airspeedswift/swift,stephentyrone/swift,deyton/swift,ahoppen/swift,aschwaighofer/swift,xwu/swift,rudkx/swift,stephentyrone/swift,hooman/swift,parkera/swift,huonw/swift,milseman/swift,zisko/swift,sschiau/swift,austinzheng/swift,parkera/swift,jmgc/swift,jmgc/swift,shahmishal/swift,JGiola/swift,allevato/swift,milseman/swift,sschiau/swift,rudkx/swift,OscarSwanros/swift,rudkx/swift,practicalswift/swift,apple/swift,amraboelela/swift,jmgc/swift,jopamer/swift,hughbe/swift,jmgc/swift,glessard/swift,xedin/swift,glessard/swift,hooman/swift,Jnosh/swift,jmgc/swift,uasys/swift,alblue/swift,rudkx/swift,roambotics/swift,jckarter/swift,shahmishal/swift,karwa/swift,jtbandes/swift,gregomni/swift,practicalswift/swift,alblue/swift,benlangmuir/swift,tjw/swift,jopamer/swift,lorentey/swift,swiftix/swift,gribozavr/swift,frootloops/swift,frootloops/swift,benlangmuir/swift,frootloops/swift,natecook1000/swift,nathawes/swift,atrick/swift,milseman/swift,karwa/swift,harlanhaskins/swift,apple/swift,uasys/swift,lorentey/swift,natecook1000/swift,Jnosh/swift,shahmishal/swift,aschwaighofer/swift,brentdax/swift,tkremenek/swift,calebd/swift,gregomni/swift,ahoppen/swift,harlanhaskins/swift,aschwaighofer/swift,JGiola/swift,devincoughlin/swift,karwa/swift,tkremenek/swift,devincoughlin/swift,zisko/swift,nathawes/swift,danielmartin/swift,JGiola/swift,airspeedswift/swift,hughbe/swift,brentdax/swift,alblue/swift,parkera/swift,sschiau/swift,jtbandes/swift,roambotics/swift,shahmishal/swift,calebd/swift,CodaFi/swift,swiftix/swift,sschiau/swift,milseman/swift,sschiau/swift,benlangmuir/swift,allevato/swift,harlanhaskins/swift,OscarSwanros/swift,glessard/swift,felix91gr/swift,natecook1000/swift,huonw/swift,hooman/swift,gregomni/swift,Jnosh/swift,apple/swift,atrick/swift,Jnosh/swift,huonw/swift,swiftix/swift,danielmartin/swift,tjw/swift,xedin/swift,apple/swift,karwa/swift,hughbe/swift,harlanhaskins/swift,hooman/swift,return/swift,practicalswift/swift,rudkx/swift,atrick/swift,shajrawi/swift,xedin/swift,hughbe/swift,alblue/swift,Jnosh/swift,practicalswift/swift,airspeedswift/swift,lorentey/swift,deyton/swift,shajrawi/swift,djwbrown/swift,xwu/swift,parkera/swift,djwbrown/swift,roambotics/swift,shajrawi/swift,zisko/swift,return/swift,return/swift,jckarter/swift,amraboelela/swift,ahoppen/swift,felix91gr/swift,hooman/swift,tkremenek/swift,rudkx/swift,deyton/swift,calebd/swift,brentdax/swift,xwu/swift,nathawes/swift,nathawes/swift,stephentyrone/swift,gribozavr/swift,Jnosh/swift,felix91gr/swift,sschiau/swift,danielmartin/swift,tkremenek/swift,uasys/swift,CodaFi/swift,return/swift,CodaFi/swift,gribozavr/swift,lorentey/swift,jopamer/swift,jckarter/swift,brentdax/swift,gregomni/swift,allevato/swift,xedin/swift,natecook1000/swift,swiftix/swift,return/swift,austinzheng/swift,felix91gr/swift,jopamer/swift,jmgc/swift,gribozavr/swift,jtbandes/swift,tjw/swift,JGiola/swift,allevato/swift,ahoppen/swift,calebd/swift,benlangmuir/swift,lorentey/swift,hooman/swift,practicalswift/swift,parkera/swift,swiftix/swift,jtbandes/swift,xedin/swift,uasys/swift,gregomni/swift,xedin/swift,CodaFi/swift,atrick/swift,zisko/swift,glessard/swift,lorentey/swift,shajrawi/swift,xwu/swift,zisko/swift,apple/swift,parkera/swift,sschiau/swift,JGiola/swift,milseman/swift,airspeedswift/swift,zisko/swift,OscarSwanros/swift,felix91gr/swift,benlangmuir/swift,jckarter/swift,airspeedswift/swift,shahmishal/swift,gribozavr/swift,shajrawi/swift,jtbandes/swift,jckarter/swift,uasys/swift,calebd/swift,natecook1000/swift,xwu/swift,deyton/swift,nathawes/swift,allevato/swift,austinzheng/swift,OscarSwanros/swift,huonw/swift,austinzheng/swift,natecook1000/swift,shajrawi/swift,shahmishal/swift,allevato/swift,jckarter/swift,danielmartin/swift,shajrawi/swift,deyton/swift,djwbrown/swift,sschiau/swift,uasys/swift,aschwaighofer/swift,benlangmuir/swift,devincoughlin/swift,hughbe/swift,stephentyrone/swift,lorentey/swift,parkera/swift,parkera/swift,felix91gr/swift,amraboelela/swift,glessard/swift,alblue/swift,harlanhaskins/swift,gribozavr/swift,huonw/swift,devincoughlin/swift,frootloops/swift,calebd/swift,austinzheng/swift,tjw/swift,austinzheng/swift,roambotics/swift,ahoppen/swift,tkremenek/swift,stephentyrone/swift,jtbandes/swift,danielmartin/swift,practicalswift/swift,jmgc/swift,hughbe/swift,devincoughlin/swift,frootloops/swift,amraboelela/swift,shajrawi/swift,karwa/swift,harlanhaskins/swift,alblue/swift,jopamer/swift,shahmishal/swift,austinzheng/swift,deyton/swift,swiftix/swift,huonw/swift,amraboelela/swift,amraboelela/swift,tkremenek/swift,huonw/swift,djwbrown/swift,brentdax/swift,milseman/swift,stephentyrone/swift,djwbrown/swift,CodaFi/swift,harlanhaskins/swift,tjw/swift,aschwaighofer/swift,airspeedswift/swift,natecook1000/swift,roambotics/swift,gribozavr/swift,alblue/swift,return/swift,nathawes/swift,OscarSwanros/swift,JGiola/swift,devincoughlin/swift,practicalswift/swift