2 files changed, 7 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 38af7da9f4..2e3992d7f2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Dec 13 00:08:09 2005  Tanaka Akira  <akr@m17n.org>
+
+	* sprintf.c (rb_str_format): fix a GC problem.
+	  [ruby-dev:28001]
+
 Mon Dec 12 15:51:22 2005  GOTOU Yuuzou  <gotoyuzo@notwork.org>
 
 	* test/openssl/test_ssl.rb (test_parallel): call GC.start to close
diff --git a/sprintf.c b/sprintf.c
index e8c0d36164..580a54ae8f 100644
--- a/sprintf.c
+++ b/sprintf.c
@@ -604,11 +604,12 @@ rb_str_format(int argc, const VALUE *argv, VALUE fmt)
 			}
 		    }
 		    else {
+                        volatile VALUE tmp1;
 			if (!RBIGNUM(val)->sign) {
 			    val = rb_big_clone(val);
 			    rb_big_2comp(val);
 			}
-			tmp = rb_big2str(val, base);
+			tmp1 = tmp = rb_big2str(val, base);
 			s = RSTRING(tmp)->ptr;
 			if (*s == '-') {
 			    if (base == 10) {