* sprintf.c (rb_f_sprintf): [ruby-dev:25104]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7503 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/sprintf.c b/sprintf.c
index 16f9c35a3e..97c392816b 100644
--- a/sprintf.c
+++ b/sprintf.c
@@ -249,6 +249,7 @@ rb_f_sprintf(argc, argv)
     fmt = GETNTHARG(0);
     if (OBJ_TAINTED(fmt)) tainted = 1;
     StringValue(fmt);
+    fmt = rb_str_new4(fmt);
     p = RSTRING(fmt)->ptr;
     end = p + RSTRING(fmt)->len;
     blen = 0;