From 94a1f488a6b7209dc4b70a04df30ad69ebdc00de Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 18 Jul 2019 00:35:21 +0900
Subject: Clear `env` before top-level execution; fix #4581

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

(limited to 'src')

diff --git a/src/vm.c b/src/vm.c
index 0a6d4af8d..86262650e 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -2834,6 +2834,7 @@ mrb_top_run(mrb_state *mrb, struct RProc *proc, mrb_value self, unsigned int sta
     return mrb_vm_run(mrb, proc, self, stack_keep);
   }
   if (mrb->c->ci == mrb->c->cibase) {
+    mrb->c->ci->env = NULL;
     return mrb_vm_run(mrb, proc, self, stack_keep);
   }
   ci = cipush(mrb);
-- 
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