Re: Bug in "revision.c: --all adds HEAD from all worktrees" ?

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On 15 November 2017 at 22:08, Junio C Hamano <gitster@xxxxxxxxx> wrote:
> Luke Diamand <luke@xxxxxxxxxxx> writes:
>
>> Quite a few of the worktrees have expired - their head revision has
>> been GC'd and no longer points to anything sensible
>> (gc.worktreePruneExpire). The function other_head_refs() in worktree.c
>> bails out if there's an error, which I think is the problem. I wonder
>> if it should instead just report something and then keep going.
>
> Am I correct to understand that your "git fsck" would fail because
> these HEAD refs used by other stale worktrees are pointing at
> missing objects?

git fsck says:

Checking object directories: 100% (256/256), done.
Checking objects: 100% (1434634/1434634), done.
error: HEAD: invalid reflog entry
7fa2b7ee4bc0d11529f659db8b13ed1f537d2a98
error: HEAD: invalid reflog entry
7fa2b7ee4bc0d11529f659db8b13ed1f537d2a98
error: HEAD: invalid reflog entry
7e79e09e8a7382f91610f7255a1b99ea59f68c0b
error: refs/stash: invalid reflog entry
feeb35e7b045d28943c706e761d0a2ac8206af2f
error: refs/remotes/origin/master: invalid reflog entry
7fa2b7ee4bc0d11529f659db8b13ed1f537d2a98
Checking connectivity: 1419477, done.
missing tree 1480c0a7ed2ad59ae701667292399c38d294658e
missing tree ca2a01116bfbbd1fcbcf9812b95d8dc6c39e69d5
missing tree 5b7c41e547fc5c4c840e5b496da13d3daebc5fbe
...
...

>
> What do you mean by "expired"?  "Even though I want to keep using
> them, Git for some reason decided to destroy them." or "I no longer
> use them but kept them lying around."?

git worktree automatically prunes work trees:

"The working tree’s administrative files in the repository (see
"DETAILS" below) will eventually be removed automatically (see
gc.worktreePruneExpire in git-config(1)),"

In my case I didn't actually want them removed, but fortunately
there's nothing important in them (there certainly isn't anymore...).

>
> If the latter, I wonder "worktree prune" to remove the
> admininstrative information for them would unblock you?

It doesn't seem to help.

$ git worktree prune -n
<lists lots of unhappy trees>
$ git worktree prune
$ git fetch
remote: Counting objects: 35, done.
remote: Compressing objects: 100% (20/20), done.
remote: Total 21 (delta 17), reused 5 (delta 1)
Unpacking objects: 100% (21/21), done.
fatal: bad object HEAD
error: ssh://whatever/myrepol did not send all necessary objects
$ /usr/bin/git-2.7.3 fetch
<works fine>




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