2 files changed, 11 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index cbe29c617c..80b34476c4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Jun 24 02:40:09 2003  Nobuyoshi Nakada  <nobu.nokada@softhome.net>
+
+	* array.c (rb_ary_unshift_m): need to check number of arguments.
+	  [ruby-talk:74189]
+
 Mon Jun 23 23:59:56 2003  Minero Aoki  <aamine@loveruby.net>
 
 	* io.c (io_close): missing prototype.
diff --git a/array.c b/array.c
index 5aa268bd82..69bf714e6f 100644
--- a/array.c
+++ b/array.c
@@ -427,7 +427,12 @@ rb_ary_unshift_m(argc, argv, ary)
     VALUE ary;
 {
     long len = RARRAY(ary)->len;
-    
+
+    if (argc < 0) {
+	rb_raise(rb_eArgError, "negative number of arguments");
+    }
+    if (argc == 0) return ary;
+
     /* make rooms by setting the last item */
     rb_ary_store(ary, len + argc - 1, Qnil);