* vm_eval.c (check_funcall): Raise ArgumentError if respond_to?

	  requires more than three arguments. [Bug #6000]
	* test/ruby/test_object.rb (class TestObject):  Test for respond_to?
	  requiring more than three arguments.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35025 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/vm_eval.c b/vm_eval.c
index 8bad08944d..398c344bc5 100644
--- a/vm_eval.c
+++ b/vm_eval.c
@@ -272,7 +272,10 @@ check_funcall(VALUE recv, ID mid, int argc, VALUE *argv)
 	VALUE args[2];
 	int arity = rb_method_entry_arity(me);
 
-	if (arity < 1 || arity > 3) arity = 2;
+	if (arity > 2)
+	    rb_raise(rb_eArgError, "respond_to? must accept 1 or 2 arguments (requires %d)", arity);
+
+	if (arity < 1) arity = 2;
 
 	args[0] = ID2SYM(mid);
 	args[1] = Qtrue;