From 82a419cde394a0026763065b42a72ddc6139d7c8 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Wed, 6 Jul 2022 10:07:02 +0900
Subject: [PATCH] vm.c (mrb_ci_kdict): should return `-1` when no kargs given;
 ref #5741

---
 src/vm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/vm.c b/src/vm.c
index 25dda5521..9a871d512 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -482,6 +482,7 @@ mrb_funcall_id(mrb_state *mrb, mrb_value self, mrb_sym mid, mrb_int argc, ...)
 static mrb_int
 mrb_ci_kidx(const mrb_callinfo *ci)
 {
+  if (ci->nk == 0) return -1;
   return (ci->n == CALL_MAXARGS) ? 2 : ci->n + 1;
 }