Bug? git show behaves incorrectly when called on a stash object

Hi,

I experience difference in behavior between `git stash show stash@{0}` and `git show stash@{0}`:

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# git stash show --name-status stash@{0}
A       a
M       conflict.js
# git show --name-status stash@{0}
commit 05aa170746dc4e060f10710a92aed4592276f2d4
Merge: 737f544 7c2160f
Author: Kirill Likhodedov [off-list ref]
Date:   Wed Mar 20 18:56:28 2013 +0400

   WIP on master: 737f544 master

MM      conflict.js

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The first gives the correct result, while the second doesn't show the addition.
Is it a bug, or I'm just missing something?

Thanks a lot!
Kirill.