The field is not property incremented by an addition assignment

[arakov]

Describe the bug The field is not property incremented by an addition assignment

To Reproduce

singleton Exceptions
{
   static int i;

   foo()
   {
         for(i := 0, i < 2, i  += 1)
         {
             console.printLine(i)
         }
    }    
}

Expected behavior The code should generate the list of numbers from 0 till 1