git-cl problem

[John Gourlay]

At long last I’m ready to upload the changes that I’ve been working on 
(updating musicxml2ly from Philomelos, issue 4751), but git-cl is not working 
for me. This is what I see in my terminal window:

[lilypond-git (philomelos %)]$ git-cl upload master

** (emacs:13854): WARNING **: Error retrieving accessibility bus address: 
org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not 
provided by any .service files
No output from [‘git', 'diff', '--no-color', '--no-ext-diff', '--full-index', 
'--ignore-submodules', '--src-prefix=a/', '--dst-prefix=b/', 'master']

(The warning from emacs is something I get every time I start emacs from the 
terminal. I think it can be ignored.) 

What am I doing wrong?

John Gourlay