git issues or repository issues?

[Karel Gardas]

Hello,

for around a year or two I do have issues which updating ghc git
repository. There are actually two issues.

The clone is created as recommended by ghc.dev:

$ git clone --recurse-submodules https://gitlab.haskell.org/ghc/ghc.git

Update is performed as recommended too:

$ git pull --recurse-submodules.

After some time (accumulated patches) since I update monthly or
bi-monthly to test I see those two issues:

1. this is what fails first and is able to be "fixed" by running another
pull:

Fetching submodule utils/hsc2hs
fatal: remote error: upload-pack: not our ref
0584d4fd443ac7a8e397895a79d162a55e36ef00
fatal: the remote end hung up unexpectedly
fatal: remote error: upload-pack: not our ref
57d23853806add183308178663c7e22fbef2417f
fatal: the remote end hung up unexpectedly
fatal: remote error: upload-pack: not our ref
5361c3d9503d017d5f42daff793837a017e4f7a7
fatal: the remote end hung up unexpectedly
fatal: remote error: upload-pack: not our ref
e5a6da21382ae76098a4f02148504b9f79e5e2ff
fatal: the remote end hung up unexpectedly
fatal: remote error: upload-pack: not our ref
3373ca908ad059cbadb526e6ed1dcba5679b0d72
fatal: the remote end hung up unexpectedly
fatal: remote error: upload-pack: not our ref
659eb37eb84e9cbdef226726f46a0fa5608eab5c
fatal: the remote end hung up unexpectedly
fatal: remote error: upload-pack: not our ref
40e1c4eb53c1e65be23e91f63139aa16111bbdf3
fatal: the remote end hung up unexpectedly
fatal: remote error: upload-pack: not our ref
b8ae1bf26ee0e74c3e2eeeee7fc2c7dd0dd2b0a2
fatal: the remote end hung up unexpectedly


2. this one is not-fixable, but hard to judge if this is issue at all or
what. Certainly "error" is making me nervous about it.

Fetching submodule utils/haddock
error: cannot lock ref 'refs/remotes/origin/wip/hsyl20/dynflags':
'refs/remotes/origin/wip/hsyl20/dynflags/exception' exists; cannot
create 'refs/remotes/origin/wip/hsyl20/dynflags'
>From https://gitlab.haskell.org/ghc/haddock
 ! [new branch]        wip/hsyl20/dynflags -> origin/wip/hsyl20/dynflags
 (unable to update local ref)
Fetching submodule utils/hsc2hs


This all is run on Ubuntu 20.04.x LTS pretty uptodate. The provided git
is 2.25.1 there.

Does anybody here have any idea why this happens?

Thanks!
Karel