The std.batmanip bigEndianToNative has a regression where the slice range doesn't work with variables (only literals).
Is the syntax incorrect or is this a regression in dmd?

Using this main.d:
import std.bitmanip;

int main(string args[])
{
   auto datain = new ubyte[16];

   // this syntax works
   ushort descriptorLength = bigEndianToNative!ushort(datain[2..4]);

   // this syntax fails (worked in previous version)
   int offset = 2;
   descriptorLength = bigEndianToNative!ushort(cast(ubyte[2]) datain[offset..offset+2]);

   return 0;
}


I get this error on the command line:
main.d(14): Error: cannot cast expression datain[cast(uint)offset..cast(uint)(offset + 2)] of type ubyte[] to ubyte[2]

I reported this as a regression https://issues.dlang.org/show_bug.cgi?id=14582