From 5addd5db4a59450427abae2e9925c529fd6868a1 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 30 Aug 2018 01:20:59 +0900
Subject: Need to clear `mrb->c->cibase->ridx` (toplevel ridx) at L_STOP; fix
 #4092

This problem only appears when `mrb` executed multiple times (i.e. `mirb`)
---
 src/vm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/vm.c b/src/vm.c
index c8088d22e..98e554607 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -2954,6 +2954,7 @@ RETRY_TRY_BLOCK:
       while (mrb->c->eidx > 0) {
         ecall(mrb);
       }
+      mrb->c->cibase->ridx = 0;
       ERR_PC_CLR(mrb);
       mrb->jmp = prev_jmp;
       if (mrb->exc) {
-- 
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