X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/1a1e3f3207b660b42127bde55119d233aca02a1c..8350f087efe62e2ce0ded434534629a56cdc4e8c:/lisp/emacs-lisp/derived.el?ds=sidebyside

diff --git a/lisp/emacs-lisp/derived.el b/lisp/emacs-lisp/derived.el
index e8f799b9af..55ea102ed2 100644
--- a/lisp/emacs-lisp/derived.el
+++ b/lisp/emacs-lisp/derived.el
@@ -133,10 +133,10 @@ BODY can start with a bunch of keyword arguments.  The following keyword
 	Declare the customization group that corresponds to this mode.
 	The command `customize-mode' uses this.
 :syntax-table TABLE
-	Use TABLE instead of the default.
+	Use TABLE instead of the default (CHILD-syntax-table).
 	A nil value means to simply use the same syntax-table as the parent.
 :abbrev-table TABLE
-	Use TABLE instead of the default.
+	Use TABLE instead of the default (CHILD-abbrev-table).
 	A nil value means to simply use the same abbrev-table as the parent.
 
 Here is how you could define LaTeX-Thesis mode as a variant of LaTeX mode:
@@ -230,7 +230,7 @@ No problems result if this variable is not bound.
 					; Run the parent.
 	 (delay-mode-hooks
 
-	  (,(or parent 'fundamental-mode))
+	  (,(or parent 'kill-all-local-variables))
 					; Identify the child mode.
 	  (setq major-mode (quote ,child))
 	  (setq mode-name ,name)
@@ -255,7 +255,10 @@ No problems result if this variable is not bound.
 				   (not (eq parent (standard-syntax-table))))
 			(set-char-table-parent ,syntax (syntax-table)))))
                 ,(when declare-abbrev
-                   `(unless (abbrev-table-get ,abbrev :parents)
+                   `(unless (or (abbrev-table-get ,abbrev :parents)
+                                ;; This can happen if the major mode defines
+                                ;; the abbrev-table to be its parent's.
+                                (eq ,abbrev local-abbrev-table))
                       (abbrev-table-put ,abbrev :parents
                                         (list local-abbrev-table))))))
 	  (use-local-map ,map)