pulling the root commit overwrites untracked files without warning (1.7.2.3)

Hi

On 1.7.2.3, pulling the root commit overwrites untracked files

Minimal working example: $ git init wc1 $ cd wc1 $ echo a > a $ git add a $ git commit -m "added a" $ mkdir ../wc2 $ cd ../wc2 $ echo b > a $ git init $ git remote add origin ../wc1 $ git pull origin master $ # expected: error: Untracked working tree file 'a' would be overwritten by merge. Aborting $ # actual: no error $ cat a $ # expected: b $ # actual: a

An excerpt from the session:
gert@planc ~/test/wc2 git[master?]
768$ git pull origin master
remote: Counting objects: 3, done.
remote: Total 3 (delta 0), reused 0 (delta 0)
Unpacking objects: 100% (3/3), done.
From ../wc1
 * branch            master     -> FETCH_HEAD
gert@planc ~/test/wc2 git[master]
769$ cat a
a