Error: need 'this' to access member i

[Ary Manzana]

Since we are adding semantic analysis to Descent and we'd like to test 
it as much as possible, we'll use dstress (at least the tests that 
pass). I'll be checking which errors gives DMD, and expect the same 
results (with source range information for Descent, and some internal 
IDs for each of the possible problems).

Compiling nocompile\a\alias_28_A.d gives me:
alias_28_A.d(16): Error: need 'this' to access member i

But Descent doesn't give me an error. So I wanted to see where this 
error is reported in DMD's code, but I can't find it. I've search for:
- "need
- to access
- access member
- need 'this'
with no results. Does anyone knows where is this error reported?

Thanks,
Ary