1.5.0.rc1.g4494: Can't use a bare GIT_DIR to add

I tried this:
  
  mkdir xyz
  cd xyz
  git --git-dir=../xyz.git   
     # Initialized empty Git repository in ../xyz.git/
  echo Junk > file-a
  git --git-dir=../xyz.git add .
     # fatal: add cannot be used in a bare git directory

I expected that "GIT_DIR is bare, over there, stuff is here" works the same
as "GIT_DIR is .git, right here among stuff".
-- 
Dr. Horst H. von Brand                   User #22616 counter.li.org
Departamento de Informatica                    Fono: +56 32 2654431
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