* object.c (rb_to_float): prohibit conversion from nil to float.

  [ruby-dev:37663]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@21204 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 0 deletions

diff --git a/object.c b/object.c
index 889a0c6d21..61aa80a014 100644
--- a/object.c
+++ b/object.c
@@ -2273,6 +2273,9 @@ rb_to_float(VALUE val)
     VALUE v;
 
     if (TYPE(val) == T_FLOAT) return val;
+    if (NIL_P(val)) {
+	rb_raise(rb_eTypeError, "can't convert nil into Float");
+    }
     v = convert_type(val, "Float", "to_f", Qtrue);
     if (TYPE(v) != T_FLOAT) {
 	const char *cname = rb_obj_classname(val);