Hello, I just upgraded to 2.11.0 from 2.10.2, and I noticed that some commands no longer print an error message when the `index.lock` file exists (such as `git merge --ff-only`).
It appears this bug was introduced in 55f5704da69d3e6836620f01bee0093ad5e331e8 (sequencer: lib'ify checkout_fast_forward()). I determined this by running the attached bisect script (on OS X, but I don't think that matters; I've also seen the error message missing on Linux): $ cd /path/to/git/src $ git bisect start v2.11.0-rc0 v2.10.2 $ git bisect run /path/to/bisect.test.sh (my original version of the script also includes some other makefile parameters to get a modern version of gettext and openssl too, but they're not relevant to this ML). I'm not certain that I have enough context to propose a meaningful patch though :/. Cheers, Robbie
bisect.test.sh
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