[Babel][Bug] Inconsistent output from babel function depending on how called

[Ethan Ligon <ligon@are.berkeley.edu>]

I'd like to call a simple babel code block to generate org-code
If I define a list thusly:

#+results: list1
 - foo
 - bar

Then I define a code block thusly, and execute it by C-c C-c on the
"source" line.  That yields the desired result: a sequence of headings
under "#+results: print_list".

#+source: print_list(lst=list1)
#+begin_src sh :results output org
  for i in $lst; do
    echo "* $i"
  done
#+end_src

#+results: print_list
#+BEGIN_ORG
* foo
* bar
#+END_ORG

Now I want to reuse the code block to generate other sequences of
headings.  But even if I call it with the *same* list, instead of the
desired headings, I get a literal, as below.

#+call: print_list(lst=list1)

#+results: print_list(lst=list1)
: * foo
: * bar

I think this qualifies as a bug---surely the method of calling the
code block shouldn't affect the output?

Thoughts, patches, or work-arounds welcomed!

Thanks,
-Ethan

-- 
Ethan Ligon, Associate Professor
Agricultural & Resource Economics
University of California, Berkeley