> *From:*  Stefan Monnier <monnier <at> iro.umontreal.ca>
> *Date:*  Sun, 03 May 2015 22:07:57 -0400
>
> >http://git.savannah.gnu.org/cgit/bash.git/diff/shell.c?h=devel&id=0385211bb5cb01e0259c64ec2c5cc6337d4e215c
>
> > So, the point has been made, but it will take a long time for this to
> > get into the default bash on all the systems Emacs supports.
>
> Good.  So we can revert beaab89896 before 25.1.
> We should still keep it a bit longer, in case some other project has
> failed to notice the obsolescence of $EMACS.

OK, it's been ten months and that should be long enough, so I reverted 
it in emacs-25 (see attached patch) and am closing this bug report. Yay! 
One less blocker for Emacs 25! (The fixed Bash isn't out yet, alas.)