1 files changed, 4 insertions, 0 deletions
diff --git a/vm_args.c b/vm_args.c
index 4e404870da..4eccb62da6 100644
--- a/vm_args.c
+++ b/vm_args.c
@@ -702,6 +702,10 @@ setup_parameters_complex(rb_execution_context_t * const ec, const rb_iseq_t * co
 	args->rest = Qfalse;
     }
 
+    if (kw_flag && iseq->body->param.flags.accepts_no_kwarg) {
+	rb_raise(rb_eArgError, "no keywords accepted");
+    }
+
     switch (arg_setup_type) {
       case arg_setup_method:
 	break; /* do nothing special */