git gc == git garbage-create from removed branch

After removing a branch, 'git gc' explodes all objects which were only in that branch. Git filled up my disk that way when I had cherry-picked from a big remote repo and then did git remote rm. Tested with Git 1.7.10.1 and 1.7.1.

$ git clone --bare --branch linux-overhaul-20010122 \
	git://git.savannah.gnu.org/config.git
...
Receiving objects: 100% (3263/3263), 517.15 KiB | 295 KiB/s, done.
...
$ cd config.git/
$ git tag -d `git tag`
...
$ git branch -D master
$ git gc
Counting objects: 1183, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (751/751), done.
Writing objects: 100% (1183/1183), done.
Total 1183 (delta 457), reused 1113 (delta 393)

$ find objects/?? -type f -print | wc -l 2080

$ git reflog expire --expire=now; git gc --prune=now Counting objects: 1183, done. Delta compression using up to 2 threads. Compressing objects: 100% (687/687), done. Writing objects: 100% (1183/1183), done. Total 1183 (delta 457), reused 1183 (delta 457)

$ ls objects/ info/ pack/

3263 fetched objects == 2080 loose objects before prune + HEAD's 1183 objects.