yes-or-no-p prompt conditionally broken in master?

[Kaushal Modi <kaushal.modi@gmail.com>]

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Hi all,

I tend to keep my e
​​
macs build updated with the master every few days.

My last build was 2 days back at this commit:
http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=a3c31adea4970b8a7fc7f495e6a6a6d4a93e69ce
and
everything worked fine.

PROBLEM:
- When on latest master, for ANY yes-or-no-p prompt, for the first prompt I
cannot see the prompt question. At times, all I see is the cursor at the
very left in the minibuffer. At times, I see no cursor and have to assume
that the minibuffer is in focus. I blindly need to hit y or n to proceed
(for example when quitting emacs). Some times, 2nd prompt onwards the
prompt questions start appearing fine.
- This issue goes away if I revert to the above linked commit with my emacs
config.
- This issue also goes away in an emacs -Q session while on the latest
commit on master.

Below are all the commits after that commit that works for me.
So some package I have installed is clashing with one of the below commits.

I tried debugging but cannot narrow down to the problem. Can one of the
authors would know if their commit could have possibly changed how
yes-or-know-p prompt display behaved? A proper direction will help me debug
the problem faster.

| Dmitry Gutov    | vc-git-mode-line-string: Explicitly re-apply the
faceHEADmaster  |
| Paul Eggert     | Treat initial-scratch-message as a doc string
         |
| Paul Eggert     | Fix describe-char bug with glyphs on terminals
          |
| Paul Eggert     | Follow text-quoting-style in display table init
         |
| K. Handa        | Fix typo
          |
| K. Handa        | Merge branch 'master' of git.sv.gnu.org:/srv/git/emacs
          |
| K. Handa        | fix previous change
         |
| David Caldwell  | * lisp/vc/vc-hooks.el (vc-refresh-state): New command
         |
| Paul Eggert     | Escape ` and ' in doc
         |
| Stefan Monnier  | Generalize the prefix-command machinery of C-u
          |
| Paul Eggert     | Rework quoting in tutorial
          |
| Paul Eggert     | Setup quote display only if interactive
         |
| Katsumi Yamaoka | Use defalias at the top level
         |
| Paul Eggert     | terminal-init-w32console mimicks command-line
         |
| Paul Eggert     | Display replacement quotes with shadow glyphs
         |
| Michael Albinus | * lisp/net/tramp-sh.el (tramp-methods) <sudo>: Mask
"Password:". |

PS: One of the packages I have installed is
http://elpa.gnu.org/packages/minibuffer-line.html and I thought that that
might be causing the problem. But disabling that did not fix this.

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