Number8 Number8 - 4 months ago 53
Git Question

How to resolve "Error: bad index – Fatal: index file corrupt" when using Git

After

git init
, I added and committed a few files, made some changes, added and committed. Set up the git daemon (running under Cygwin on WinXP) and cloned the repository once.
Now, I get this error with the cloned repository:

$ git status
error: bad index file sha1 signature
fatal: index file corrupt


Is there any way to fix this, other than getting a new copy of the repository?

Answer

If the problem is with the index as the staging area for commits (i.e. .git/index), you can simply remove the index (make a backup copy if you want), and then restore index to version in the last commit:

On OSX/Linux:

rm -f .git/index
git reset

On Windows:

del .git\index
git reset

(The reset command above is the same as git reset --mixed HEAD)

You can alternatively use lower level plumbing git read-tree instead of git reset.


If the problem is with index for packfile, you can recover it using git index-pack.