From Newsgroup: gnu.emacs.help

(I posted this a week or so ago in the "wrong" emacs group, and just
silence. Maybe that one is essentially dead, so I thought I'd try here.)

In emacs 28.2 (started as "emacs -Q"), if I have a file

------------------------------------cut here---------------------
#! /bin/sh

while
do
done
------------------------------------cut here---------------------

and I mark the region with the (partial) while loop and then
M-x indent-region
nothing changes.

However, in emacs 30.2, the partial while loop changes to

while
do
done

The same thing happens with "until" loops, but not "for" loops.


Other info: with no condition, in 30.2 with the cursor at the beginning of
the "do" line, smie-config-show-indent (C-c ?) says
Rules used: :elem basic -> 4, :after "while" -> nil
whereas in

for
do
done

(i.e., a for loop with no loop variable or list) with the cursor at the beginning of the "do" line, smie-config-show-indent says
Rules used: :before "do" -> 0

For the "while", Emacs 28.2's smie reports this:
Rules used: :before "do" -> 0


Yes, I know I am missing the while condition there, and if I put it in,
emacs 30.2 behaves itself. So I can deal with it.


My question is this: is this an intentional change in smie? I browsed
emacs' NEWS file and didn't see anything about a functional change in smie.


Jim
--- Synchronet 3.21a-Linux NewsLink 1.2