ps-print-buffer and emacs 26

[George McNinch]

Hi,

For what it is worth:

I noticed that ps-print-buffer doesn't work for me in emacs-26,
though it is fine in emacs-25.

(Actually, this has been true for at least a few weeks, but 
e.g. it is true for a fairly recent compile of 26.0.50.)

Symptom:

start emacs (/usr/local/bin/emacs-26) via:

emacs-26 -Q

Then

C-u M-x ps-print-buffer <RET> ~/Desktop/foo.ps <RET>

yields a skeletal postscript file foo.ps with no content, no 
matter the buffer content that should have been printed.

I diffed ....share/emacs/26.0.50/lisp/ps-print.el.gz

with ....share/emacs/25.2.50/lisp/ps-print.el.gz

and more-or-less the only difference was the

-*- lexical-binding: t -*- 

bit on the first line.

And indeed, after making a copy of ps-print.el.gz, I deleted this 
"lexical-binding" setting, deleted the .elc file, restarted 
emacs-26 and now ps-print-buffer seems to work as expected.

I fumbled around a bit, but couldn't really work out more 
specifically what is breaking...

All the best,
gm

--
oOo George McNinch