emacsclient not working on RHEL 6.8 (non-sudo) [master branch]

[Kaushal Modi]

Hello all,

I rebuilt emacs from master today using commit 9a162e2 after about a
month, and was surprised to see that my wrapper bash script that
called "emacsclient -a '' -c&" (two single quote follow that -a
option) no longer works.

Upon running "emacsclient -a '' -c&" directly, I get:

=====
Warning: due to a long standing Gtk+ bug
https://gitlab.gnome.org/GNOME/gtk/issues/221
Emacs might crash when run in daemon mode and the X11 connection is
unexpectedly lost.
Using an Emacs configured with --with-x-toolkit=lucid does not have
this problem.
Loading paren...
Loading paren...done
Key Chord mode on
Loading /home/kmodi/.emacs.d/elisp/ox-hugo/ox-hugo-autoloads.el (source)...
Loading /home/kmodi/.emacs.d/elisp/ox-hugo/ox-hugo-autoloads.el (source)...done
All backup files will be saved to /tmp/kmodi/.backups/.
Turning on magit-auto-revert-mode...
Turning on magit-auto-revert-mode...done
Starting Emacs daemon.
Restarting server
Emacs daemon should have started, trying to connect again
Waiting for Emacs...
[1]  + Suspended (tty output)        emacsclient -a  -c
=====

On doing fg, I get:

=====
emacsclient -a  -c
Broken pipe
=====

(Looks like those empty single quotes get lost now?)

Well, I get the same result with "emacsclient -c" too.

I am on RHEL 6.8 without sudo access.

I looked at the NEWS but any backward incompatible change wasn't evident.

But looking at 
https://git.savannah.gnu.org/cgit/emacs.git/log/?qt=grep&q=emacsclient,
it looks like some series changes related to emacsclient happened in
the last two weeks.

What debug info can I provide to make emacsclient work once again on my machine?

Thanks.

--
Kaushal Modi