[elpa] externals/lmc 6cd76ac 05/14: * packages/lmc/lmc.el (lmc-store-word): match-data can change in sit-for.

[Stefan Monnier]

branch: externals/lmc
commit 6cd76acd0522e0363087c0a4f663f09cc55dc0a9
Author: Stefan Monnier <monnier@iro.umontreal.ca>
Commit: Stefan Monnier <monnier@iro.umontreal.ca>

    * packages/lmc/lmc.el (lmc-store-word): match-data can change in sit-for.
    Reported by William Léchelle <william.lechelle@umontreal.ca>.
---
 lmc.el | 35 +++++++++++++++++------------------
 1 file changed, 17 insertions(+), 18 deletions(-)

diff --git a/lmc.el b/lmc.el
index 2e6e34e..656539d 100644
--- a/lmc.el
+++ b/lmc.el
@@ -1,9 +1,9 @@
 ;;; lmc.el --- Little Man Computer in Elisp
 
-;; Copyright (C) 2011  Free Software Foundation, Inc.
+;; Copyright (C) 2011, 2013  Free Software Foundation, Inc.
 
 ;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
-;; Version: 1.0
+;; Version: 1.1
 
 ;; This program is free software; you can redistribute it and/or modify
 ;; it under the terms of the GNU General Public License as published by
@@ -540,22 +540,21 @@
     (lmc-addr->point addr)
     (if (not (re-search-forward "\t.*\t\\(.*\\)$" (line-end-position) t))
         (error "Missing memory cell %S" addr)
-      (when lmc-store-flash
-        (lmc--with-silent-modifications
-          (put-text-property (match-beginning 1) (point)
-                             'face 'region))
-        (sit-for 0.2))
-      (replace-match (format "  %03d" word) t t nil 1)
-      (when lmc-store-flash
-        (sit-for 0.1)
-        (lmc--with-silent-modifications
-          (put-text-property (match-beginning 1) (point)
-                             'face 'region))
-        (sit-for 0.1)
-        (lmc--with-silent-modifications
-          (put-text-property (match-beginning 1) (point)
-                             'face nil))
-        (sit-for 0.1)))))
+      (let ((mb1 (match-beginning 1)))
+        (when lmc-store-flash
+          (lmc--with-silent-modifications
+           (put-text-property mb1 (point) 'face 'region))
+          (sit-for 0.2))
+        (let ((me1 (point)))
+          (insert (format "  %03d" word)) (delete-region mb1 me1))
+        (when lmc-store-flash
+          (sit-for 0.1)
+          (lmc--with-silent-modifications
+           (put-text-property mb1 (point) 'face 'region))
+          (sit-for 0.1)
+          (lmc--with-silent-modifications
+           (put-text-property mb1 (point) 'face nil))
+          (sit-for 0.1))))))
 
 (defun lmc-step ()
   "Execute one LMC instruction."