git bug: moved file with local unstaged changes are lost during merge

What steps will reproduce the problem? git init echo "initial checkin" >> readme git add readme git commit -m "inital checkin" git branch b1 git checkout b1 echo "b1" >> readme git add readme git commit -m "b1 readme" git checkout master git mv readme readme_master git ci -m "moved readme" echo "master" >> readme_master git merge b1

What is the expected output? What do you see instead? I expect to have git prevent the merge due to local changes to the file. Instead it overwrites the file (erasing the local modification "master") and you end up with: cat readme_master initial readme b1

What version of the product are you using? On what operating system? Reproduced on 1.7.9.6 and from the git-core repo 1.7.10.128.g7945c. This is on ubuntu 10.04.

Please provide any additional information below.

This problem only seems to occur after you check in the move, then make local modifications, then do the merge.