2 files changed, 6 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 66de79ce97..92ae8ea1ba 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sun Jun 29 23:01:54 2008  Tanaka Akira  <akr@fsij.org>
+
+	* string.c (rb_str_format_m): make tmp volatile to avoid possible GC
+	  problem.
+
 Sun Jun 29 18:01:30 2008  Kouhei Sutou  <kou@cozmixng.org>
 
 	* lib/rss/parser.rb, lib/rss/utils.rb: merge documents from ruby_1_8.
diff --git a/string.c b/string.c
index 49f3ba9456..983f3e682a 100644
--- a/string.c
+++ b/string.c
@@ -957,7 +957,7 @@ rb_str_times(VALUE str, VALUE times)
 static VALUE
 rb_str_format_m(VALUE str, VALUE 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);