From 1f5ba7e01d01450f29d78092856d925652917010 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sun, 20 Oct 2024 19:30:45 +0900
Subject: [PATCH] vm.c (OP_STRCAT): mrb_str_concat may call VM recursively

And recursive calls may reallocate call-info stack.
---
 src/vm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/vm.c b/src/vm.c
index 3ed498405..2d0f9ee98 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -2774,6 +2774,7 @@ RETRY_TRY_BLOCK:
     CASE(OP_STRCAT, B) {
       mrb_assert(mrb_string_p(regs[a]));
       mrb_str_concat(mrb, regs[a], regs[a+1]);
+      ci = mrb->c->ci;
       NEXT;
     }