From 1489338145e8bad8b56d1bde411ae2c5adc75993 Mon Sep 17 00:00:00 2001
From: dearblue <dearblue@users.osdn.me>
Date: Sat, 25 Jun 2022 11:10:39 +0900
Subject: [PATCH] Use `mrb->object_class` instead if `MRB_PROC_TARGET_CLASS()`
 is `NULL`

Fix #5725
---
 src/variable.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/variable.c b/src/variable.c
index 68d3a388d..38d35f636 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -828,6 +828,7 @@ mrb_vm_const_get(mrb_state *mrb, mrb_sym sym)
   proc = proc->upper;
   while (proc) {
     c2 = MRB_PROC_TARGET_CLASS(proc);
+    if (!c2) c2 = mrb->object_class;
     if (c2 && iv_get(mrb, c2->iv, sym, &v)) {
       return v;
     }