Do not deref in overload resolution if the type is not known - fixes #4825 (#4826)
Do not deref in overload resolution if the type is not known - fixes #4825 (#4826)


syeerzy/visualfsharp,brettfo/visualfsharp,dsyme/FSharp.Compiler.Service,ncave/FSharp.Compiler.Service,dsyme/fsharp,dsyme/fsharp,brettfo/visualfsharp,syeerzy/visualfsharp,dsyme/FSharp.Compiler.Service,fsharp/fsharp,fsharp/fsharp,syeerzy/visualfsharp,Jand42/FSharp.Compiler.Service,ncave/FSharp.Compiler.Service,brettfo/visualfsharp,cloudRoutine/FSharp.Compiler.Service,dsyme/FSharp.Compiler.Service,dsyme/fsharp,syeerzy/visualfsharp,dsyme/fsharp,cloudRoutine/FSharp.Compiler.Service,dsyme/fsharp,fsharp/fsharp,dsyme/fsharp,ncave/FSharp.Compiler.Service,brettfo/visualfsharp,dsyme/fsharp,Jand42/FSharp.Compiler.Service,Jand42/FSharp.Compiler.Service,syeerzy/visualfsharp,brettfo/visualfsharp,cloudRoutine/FSharp.Compiler.Service,brettfo/visualfsharp,syeerzy/visualfsharp