* src/eval.c (unbind_for_thread_switch): Fix iteration over the

specpdl stack.

2 files changed, 7 insertions, 2 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 705b9c771df..b6ecd5f60ba 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2013-10-19  Barry O'Reilly <gundaetiapo@gmail.com>
+
+	* eval.c (unbind_for_thread_switch): Fix iteration over the
+	specpdl stack.
+
 2013-09-01  Eli Zaretskii  <eliz@gnu.org>
 
 	* eval.c (unbind_for_thread_switch): Accept a 'struct
diff --git a/src/eval.c b/src/eval.c
index b8a61590387..fc16c15e626 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -3488,9 +3488,9 @@ unbind_for_thread_switch (struct thread_state *thr)
 {
   union specbinding *bind;
 
-  for (bind = thr->m_specpdl_ptr; bind != thr->m_specpdl; --bind)
+  for (bind = thr->m_specpdl_ptr; bind > thr->m_specpdl;)
     {
-      if (bind->kind >= SPECPDL_LET)
+      if ((--bind)->kind >= SPECPDL_LET)
 	{
 	  bind->let.saved_value = find_symbol_value (specpdl_symbol (bind));
 	  do_one_unbind (bind, 0);