Roslyn: The C# compiler failed to compile "obj is byte*[]" form

[anydream]

Version Used:
Visual Studio 2017
C#7.1
.NET Framework 4.7

Steps to Reproduce:

1. Try to compile this code:
   C# namespace Test { static unsafe class Program { static void Main() { object obj = new byte*[10]; bool b = obj is byte*[]; } } }

Expected Behavior:
Compile success.

Actual Behavior:
Program.cs(8,20,8,24): error CS1525: Invalid expression term 'byte'
Program.cs(8,25,8,26): error CS1525: Invalid expression term '['
Program.cs(8,26,8,27): error CS0443: Syntax error; value expected

[HaloFour]

The is operator doesn't work with pointers. I believe that limitation is inherited from the CLR isinst opcode not being able to distinguish between different pointer types.

[anydream]

The type byte*[] isn't a pointer type, it's actually an array type.
And that code can compiled by older csc.exe compilers.
So I think maybe that's a bug, not feature.