* io.c (rb_f_p): return nil if no argument. [ruby-dev:31285]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12843 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/io.c b/io.c
index cda216789b..b108b20705 100644
--- a/io.c
+++ b/io.c
@@ -3991,7 +3991,7 @@ rb_f_p(int argc, VALUE *argv, VALUE self)
     if (argc == 1) {
 	ret = argv[0];
     }
-    else {
+    else if (argc > 1) {
 	ret = rb_ary_new4(argc, argv);
     }
     if (TYPE(rb_stdout) == T_FILE) {