Hello,

org-bibtex.el contains a reference to longlines-mode, which is obsolete
in emacs trunk since Dec. 4.  When the function was made obsolete, the
version of org distributed with emacs was changed to use
visual-line-mode (the successor to longlines-mode).

But it seems that this change hasn’t made it to the orgmode git repo yet
– either on the master or maint branches.  Is that an expected result?

In case it’s useful, I’ve attached a patch to make this change.