Question 135601 in Visual Studio Code Question posted in
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Visual Studio Code – All merge conflicts cause an error, cannot be resolved

Over the last few weeks, any time I get a merge conflict I get a fatal error.

Steps to reproduce:

  1. checkout branch name
  2. git pull origin master

At this point, my VScode would show the conflict(s) in the file and give me the opportunity of which to pick. This has happened for years..

But now, I get this error instead

 * branch            master     -> FETCH_HEAD
fatal: Not possible to fast-forward, aborting.

VScode won’t show me the conflict, there appears to be no way to resolve it except for deleting entire branch, creating a new branch from master, then rebuilding all my changes.

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2

Answers


  1. Chosen as BEST ANSWER
    0

    steps to fix:

    % vi ~/.gitconfig
    in vi, type E

    in edit screen, Comment out 2 lines

    #[pull]

    #ff only

    Save, everything works


  2. 0

    The message:

    fatal: Not possible to fast-forward, aborting.

    means that you’ve told Git to use --ff-only for the merge that occurs as the second step of git pull1 and that this merge cannot be done as a fast-forward.

    There was a bug in Git 2.33 where --ff-only misbehaved in certain cases:

     * "git pull --ff-only" and "git pull --rebase --ff-only" should make
   it a no-op to attempt pulling from a remote that is behind us, but
   instead the command errored out by saying it was impossible to
   fast-forward, which may technically be true, but not a useful thing
   to diagnose as an error.  This has been corrected.
   (merge 361cb52383 jc/fix-pull-ff-only-when-already-up-to-date later to maint).

    If you have this version of Git, you should upgrade to 2.34 or later. Your comment implies that you’ve hit this particular bug.

    (Your comment about Bitbucket almost certainly involves something else entirely, and is a Bitbucket issue, not a Git one.)

    1Remember that git pull is a convenience short-cut that means:

    1. run git fetch;
    2. run a second Git command to do something with the commits obtained in step 1.

    The default second command is git merge but you can choose git rebase instead. The --ff-only option is an option to git merge and means nothing to git rebase, so git pull won’t supply --ff-only to the second command if you choose git rebase (but it is supposed to stop the rebase for that case). Whether git merge supplies --ff-only to the second command if you choose git merge depends on how you configure git pull to operate.

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