Subject: bug#68364: Print log buttons fail with vc-log-mergebase

From: Juri Linkov <[email-masked]>
Date: Wed, 10 Jan 2024 09:28:13 +0200

Buttons to show more log entries is a nice feature,
but after the recent change this doesn't work with
'C-x v M L' (vc-log-mergebase):

  Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p "branch-2")
    vc-print-log-setup-buttons("branch-1" t "branch-2" nil)

Probably it requires a special handling for 'C-x v M L'.