String switch is odd using betterC

[Abby]

On Wednesday, 26 February 2020 at 08:25:00 UTC, Abby wrote:
> /dlang/dmd/linux/bin64/../../src/druntime/import/object.d(2999): Error: TypeInfo cannot be used with -betterC
>
> Odd think is that wehen I remove g from my enum it compiles 
> just fine, so it seems that this compilation error occurs only 
> when my enum has more then 6 members.
>
> Any idea why?

Ok so this is enough to reproduce the problem

extern(C) void main()
{
     auto s = "F";
     final switch(s)
     {
         case "A": break;
         case "B": break;
         case "C": break;
         case "D": break;
         case "E": break;
         case "F": break;
         case "G": break;
     }
}