2 files changed, 6 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 0722190fae..4f53e99e44 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Jun 29 23:01:54 2008  Tanaka Akira  <[email protected]>
+
+	* string.c (rb_str_format_m): make tmp volatile to avoid possible GC
+	  problem.
+
 Sun Jun 29 19:19:42 2008  Nobuyoshi Nakada  <[email protected]>
 
 	* array.c (rb_ary_fill): check for negative length.
diff --git a/string.c b/string.c
index 4f0517938f..615af97e67 100644
--- a/string.c
+++ b/string.c
@@ -462,7 +462,7 @@ static VALUE
 rb_str_format_m(str, arg)
     VALUE str, arg;
 {
-    VALUE tmp = rb_check_array_type(arg);
+    volatile VALUE tmp = rb_check_array_type(arg);
 
     if (!NIL_P(tmp)) {
 	return rb_str_format(RARRAY_LEN(tmp), RARRAY_PTR(tmp), str);