Created attachment 227092 [details]
test case showing the compiler error

Description of Problem:

Compiler fails to parse an expression containing a right bit shift operation.

Simple expressions as such are compiled, a more complex one fails.

Steps to reproduce the problem:
1. compile the attached file: gmcs invalid-parsing.cs
2. 

Actual Results:
invalid-parsing.cs(39,79): error CS1002: Expecting `;'
invalid-parsing.cs(43,25): error CS1518: Expected `class', `delegate', `enum', `interface', or `struct'

Expected Results:
No error message.

How often does this happen? 
Repeatable.

Additional Information:
Enclosing the sub-expression with brackets eliminates the error.