(byte-compile-defvar-or-defconst): Only cons onto

current-load-list in top-level forms.  Else this leaks a cons cell
every time a defun is called.

1 files changed, 27 insertions, 18 deletions

diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el
index f0f24213d17..800df042a78 100644
--- a/lisp/emacs-lisp/bytecomp.el
+++ b/lisp/emacs-lisp/bytecomp.el
@@ -10,7 +10,7 @@
 
 ;;; This version incorporates changes up to version 2.10 of the
 ;;; Zawinski-Furuseth compiler.
-(defconst byte-compile-version "$Revision: 1.1 $")
+(defconst byte-compile-version "$Revision: 2.76 $")
 
 ;; This file is part of GNU Emacs.
 
@@ -3213,26 +3213,35 @@ If FORM is a lambda or a macro, byte-compile it as a function."
 
 (defun byte-compile-defvar (form)
   ;; This is not used for file-level defvar/consts with doc strings.
-  (let ((var (nth 1 form))
+  (let ((fun (nth 0 form))
+        (var (nth 1 form))
         (value (nth 2 form))
         (string (nth 3 form)))
-    (if (memq 'free-vars byte-compile-warnings)
-        (setq byte-compile-bound-variables
-              (cons var byte-compile-bound-variables)))
+    (when (> (length form) 4)
+      (byte-compile-warn
+       "%s %s called with %d arguments, but accepts only %s"
+       fun var (length (cdr form)) 3))
+    (when (memq 'free-vars byte-compile-warnings)
+      (setq byte-compile-bound-variables
+            (cons var byte-compile-bound-variables)))
     (byte-compile-body-do-effect
-     (list (if (cdr (cdr form))
-               (if (eq (car form) 'defconst)
-                   (list 'setq var value)
-                 (list 'or (list 'boundp (list 'quote var))
-                       (list 'setq var value))))
-           ;; Put the defined variable in this library's load-history entry
-           ;; just as a real defvar would.
-           (list 'setq 'current-load-list
-                 (list 'cons (list 'quote var)
-                       'current-load-list))
-           (if string
-               (list 'put (list 'quote var) ''variable-documentation string))
-           (list 'quote var)))))
+     (list
+      ;; Put the defined variable in this library's load-history entry
+      ;; just as a real defvar would, but only in top-level forms.
+      (when (null byte-compile-current-form)
+        `(push ',var current-load-list))
+      (when (> (length form) 3)
+        (when (and string (not (stringp string)))
+          (byte-compile-warn "Third arg to %s %s is not a string: %s"
+                             fun var string))
+        `(put ',var 'variable-documentation ,string))
+      (if (cdr (cdr form))              ; `value' provided
+          (if (eq fun 'defconst)
+              ;; `defconst' sets `var' unconditionally.
+              `(setq ,var ,value)
+            ;; `defvar' sets `var' only when unbound.
+            `(if (not (boundp ',var)) (setq ,var ,value))))
+      `',var))))
 
 (defun byte-compile-autoload (form)
   (and (byte-compile-constp (nth 1 form))