From e8da16cdf5cfbe334be2eaba38468881352db017 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Mon, 27 Nov 2023 23:52:45 +0900
Subject: [PATCH] vm.c (exec_irep): need to support aliases

---
 src/vm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/vm.c b/src/vm.c
index 774ba03db..1ceb0e115 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -750,6 +750,11 @@ exec_irep(mrb_state *mrb, mrb_value self, const struct RProc *p)
   mrb_int keep, nregs;
 
   ci->stack[0] = self;
+  /* handle alias */
+  if (MRB_PROC_ALIAS_P(p)) {
+    ci->mid = p->body.mid;
+    p = p->upper;
+  }
   CI_PROC_SET(ci, p);
   if (MRB_PROC_CFUNC_P(p)) {
     if (MRB_PROC_NOARG_P(p) && (ci->n > 0 || ci->nk > 0)) {