[racket] srcloc in unbound identifier errors

Hi,

most exception for an unknown variable give proper srcloc information, but  
inside a submodule with phase > 0 it's missing.
Is there any reason or would it be possible to add?

Tobias

;; --- example ---

#lang racket/base

main-0
;;> error.rkt:4:0: main-0: unbound identifier in module (...)

(begin-for-syntax
  main-1)
;;> error.rkt:8:1: main-1: unbound identifier in the transformer  
environment; (...)

(module m racket
   mod-0
   ;;> error.rkt:13:2: mod-0: unbound identifier in module (...)

   (begin-for-syntax
    mod-1))
   ;;mod-1: undefined;
   ;;  cannot reference an identifier before its definition
   ;;  in module: 'm
   ;;  phase: 1
   ;;  context...:
   ;;    standard-module-name-resolver



-- 
---------------------------------------------------------
Tobias Hammer
DLR / Robotics and Mechatronics Center (RMC)
Muenchner Str. 20, D-82234 Wessling
Tel.: 08153/28-1487
Mail: tobias.hammer at dlr.de