* lisp/emacs-lisp/bytecomp.el (=, <, >, <=, >=): Don't optimize multi-arg

case.

Fixes: debbugs:18767

2 files changed, 11 insertions, 5 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 6b0c8a67b79..1a458522079 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2014-10-20  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+        * emacs-lisp/bytecomp.el (=, <, >, <=, >=): Don't optimize multi-arg
+        case (bug#18767).
+
 2014-10-15  Alan Mackenzie  <acm@muc.de>
 
         * cus-edit.el (custom-command-apply): Specify the return value in
diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el
index e5f8a8cc22a..69c4e0f1628 100644
--- a/lisp/emacs-lisp/bytecomp.el
+++ b/lisp/emacs-lisp/bytecomp.el
@@ -3261,11 +3261,11 @@ If it is nil, then the handler is \"byte-compile-SYMBOL.\""
 (byte-defop-compiler cons               2)
 (byte-defop-compiler aref               2)
 (byte-defop-compiler set                2)
-(byte-defop-compiler (= byte-eqlsign)   2-and)
-(byte-defop-compiler (< byte-lss)       2-and)
-(byte-defop-compiler (> byte-gtr)       2-and)
-(byte-defop-compiler (<= byte-leq)      2-and)
-(byte-defop-compiler (>= byte-geq)      2-and)
+(byte-defop-compiler (= byte-eqlsign)   2) ;; -and  bug#18767
+(byte-defop-compiler (< byte-lss)       2) ;; -and  bug#18767
+(byte-defop-compiler (> byte-gtr)       2) ;; -and  bug#18767
+(byte-defop-compiler (<= byte-leq)      2) ;; -and  bug#18767
+(byte-defop-compiler (>= byte-geq)      2) ;; -and  bug#18767
 (byte-defop-compiler get                2)
 (byte-defop-compiler nth                2)
 (byte-defop-compiler substring          2-3)
@@ -3332,6 +3332,7 @@ If it is nil, then the handler is \"byte-compile-SYMBOL.\""
 (defun byte-compile-and-folded (form)
   "Compile calls to functions like `<='.
 These implicitly `and' together a bunch of two-arg bytecodes."
+  ;; FIXME: bug#18767 means we can't do it this way!
   (let ((l (length form)))
     (cond
      ((< l 3) (byte-compile-form `(progn ,(nth 1 form) t)))