1 files changed, 9 insertions, 4 deletions

diff --git a/lisp/emacs-lisp/byte-opt.el b/lisp/emacs-lisp/byte-opt.el
index cb9f4ffab3a..8b7937b7d80 100644
--- a/lisp/emacs-lisp/byte-opt.el
+++ b/lisp/emacs-lisp/byte-opt.el
@@ -1094,16 +1094,21 @@
 
 ;; As byte-decompile-bytecode, but updates
 ;; byte-compile-{constants, variables, tag-number}.
-;; If the optional 3rd arg is true, then `return' opcodes are replaced
+;; If MAKE-SPLICEABLE is true, then `return' opcodes are replaced
 ;; with `goto's destined for the end of the code.
-(defun byte-decompile-bytecode-1 (bytes constvec &optional make-splicable)
+;; That is for use by the compiler.
+;; If MAKE-SPLICEABLE is nil, we are being called for the disassembler.
+;; In that case, we put a pc value into the list
+;; before each insn (or its label).
+(defun byte-decompile-bytecode-1 (bytes constvec &optional make-spliceable)
   (let ((length (length bytes))
         (ptr 0) optr tag tags op offset
         lap tmp
         endtag
         (retcount 0))
     (while (not (= ptr length))
-      (setq lap (cons ptr lap))
+      (or make-spliceable
+          (setq lap (cons ptr lap)))
       (setq op (aref bytes ptr)
             optr ptr
             offset (disassemble-offset)) ; this does dynamic-scope magic
@@ -1125,7 +1130,7 @@
                                 (car (setq byte-compile-variables
                                            (cons (list tmp)
                                                  byte-compile-variables)))))))
-            ((and make-splicable
+            ((and make-spliceable
                   (eq op 'byte-return))
              (if (= ptr (1- length))
                  (setq op nil)