[DRE-maint] Bug#942633: gitlab: Experimental gitlab requires gitshell 9.3.0 but only 9.1.0 is packaged

[Pirate Praveen]

On Mon, 11 Nov 2019 22:15:20 +0530 Pirate Praveen
<praveen at onenetbeyond.org> wrote:
> Control: retitle -1 ssh access fails with gitaly-upload-pack: fatal:
> error: %v
> On Sat, 2 Nov 2019 14:51:42 +0100 Romain Bignon <romain at symlink.me> wrote:
> > Hello,
> > 
> > The problem is still here, and is so not related to compatibility between
> > versions of gitlab/gitlab-shell/gitality…
> > 
> > Is there anything I can do to find the origin of this issue?
> 
> Fortunately or unfortunately the same error hit my instance as well. I'm
> digging deeper into it now.
> 
> As a workaround you can use https access till we fix this (only ssh
> access is affected).

Found the root cause to be ruby-google-protobuf update from 3.7 to 3.10.
But to actually get it work is tricky.

If we downgrade ruby-google-protobuf to 3.7.1, then gitaly fails to build.