Hi,

I get the error while doing twice a :Gwrite (same or different file).

fugitive: fatal: Unable to create '.../.git/index.lock': File exists.^@^@Another git process seems to be running in this repository, e.g.^@an editor opened by 'git commit'. Please make sure all processes^@are terminated
 then try again. If it still fails, a git process^@may have crashed in this repository earlier:^@remove the file manually to continue.

The file does not exist, there is no other IDE or other git process running. I tried the master, race-condition branch as well as tags/v3.*.
It is possible to close and open vim to recover, then :Gwrite works one time, the second time fails again.

As it works on my other machines, I guess it is a issue with my setup (different linux, different git version, ...). Is there any possibility to turn on some debug output or logging to track down this issue?