commit e5dbeb77f4da2fe8b13e13bfe8d5ce4565b83f56 (HEAD, refs/remotes/origin/master)
Author: Jaesup Kwak <veshboo@gmail.com>
Date:   Fri Nov 24 11:33:32 2017 +0200

    Avoid unnecessary xwidget_view creations
    
    * src/xwidget.c (x_draw_xwidget_glyph_string): Don't create new
    xwidget view if we have a usable one already.
    
    Copyright-paperwork-exempt: yes

diff --git a/src/xwidget.c b/src/xwidget.c
index a0c9e03477..a67dc0ecf4 100644
--- a/src/xwidget.c
+++ b/src/xwidget.c
@@ -585,22 +585,20 @@ x_draw_xwidget_glyph_string (struct glyph_string *s)
      xwidget on screen.  Moving and clipping is done here.  Also view
      initialization.  */
   struct xwidget *xww = s->xwidget;
-  struct xwidget_view *xv;
+  struct xwidget_view *xv = xwidget_view_lookup (xww, s->w);
   int clip_right;
   int clip_bottom;
   int clip_top;
   int clip_left;
 
-  /* FIXME: The result of this call is discarded.
-     What if the lookup fails?  */
-  xwidget_view_lookup (xww, s->w);
-
   int x = s->x;
   int y = s->y + (s->height / 2) - (xww->height / 2);
 
   /* Do initialization here in the display loop because there is no
-     other time to know things like window placement etc.  */
-  xv = xwidget_init_view (xww, s, x, y);
+     other time to know things like window placement etc.  Do not
+     create a new view if we have found one that is usable.  */
+  if (!xv)
+    xv = xwidget_init_view (xww, s, x, y);
 
   int text_area_x, text_area_y, text_area_width, text_area_height;
 

commit ed36c71a1e36b919c57cd9f1ab73210e64810fcb
Author: Alex Branham <branham@utexas.edu>
Date:   Fri Nov 24 10:59:12 2017 +0200

    More informative error when autosave file is not available
    
    * lisp/files.el (recover-file): Distinguish in error messages
    between autosave file not existing and not being current.
    (Bug#29179)

diff --git a/lisp/files.el b/lisp/files.el
index ae90d19f2f..63dd509eab 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -5881,7 +5881,11 @@ an auto-save file."
       (error "%s is an auto-save file" (abbreviate-file-name file)))
   (let ((file-name (let ((buffer-file-name file))
 		     (make-auto-save-file-name))))
-    (cond ((if (file-exists-p file)
+    (cond ((and (file-exists-p file)
+                (not (file-exists-p file-name)))
+           (error "Auto save file %s does not exist"
+                  (abbreviate-file-name file-name)))
+          ((if (file-exists-p file)
 	       (not (file-newer-than-file-p file-name file))
 	     (not (file-exists-p file-name)))
 	   (error "Auto-save file %s not current"

commit 197dd690112e8eef6457b16adbe6e2c1d801c849
Author: Stefan Monnier <monnier@iro.umontreal.ca>
Date:   Thu Nov 23 13:35:15 2017 -0500

    * lisp/simple.el (clone-buffer): Adjust `mark-ring'

diff --git a/lisp/simple.el b/lisp/simple.el
index fde6669df1..41f22b2396 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -8516,13 +8516,16 @@ after it has been set up properly in other respects."
 
       ;; Set up other local variables.
       (mapc (lambda (v)
-	      (condition-case ()	;in case var is read-only
+	      (condition-case ()
 		  (if (symbolp v)
 		      (makunbound v)
 		    (set (make-local-variable (car v)) (cdr v)))
-		(error nil)))
+		(setting-constant nil))) ;E.g. for enable-multibyte-characters.
 	    lvars)
 
+      (setq mark-ring (mapcar (lambda (mk) (copy-marker (marker-position mk)))
+                              mark-ring))
+
       ;; Run any hooks (typically set up by the major mode
       ;; for cloning to work properly).
       (run-hooks 'clone-buffer-hook))