svn cleanup: sqlite: database disk image is malformed

I had the same problem. The following blog post helped me resolve it:

You do an integrity check on the sqlite database that keeps track of the repository (/.svn/wc.db):

sqlite3 .svn/wc.db "pragma integrity_check"

That should report some errors.

Then you might be able to clean them up by doing:

sqlite3 .svn/wc.db "reindex nodes"
sqlite3 .svn/wc.db "reindex pristine"

If there are still errors after that, you still got the option to check out a fresh copy of the repository to a temporary folder and copy the .svn folder from the fresh copy to the old one. Then the old copy should work again and you can delete the temporary folder.