From 160935dc24f4831f857dd0e13b983a3d44981a3d Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Wed, 25 Dec 2024 12:39:57 +0900
Subject: [PATCH] mruby-compiler (mrb_prev_pc): add assertion to ensure pc
 within iseq

---
 mrbgems/mruby-compiler/core/codegen.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c
index d50df8fb3..9080ffa04 100644
--- a/mrbgems/mruby-compiler/core/codegen.c
+++ b/mrbgems/mruby-compiler/core/codegen.c
@@ -450,6 +450,7 @@ mrb_prev_pc(codegen_scope *s, const mrb_code *pc)
   const mrb_code *prev_pc = NULL;
   const mrb_code *i = s->iseq;
 
+  mrb_assert(pc < s->iseq + s->icapa);
   while (i<pc) {
     uint8_t insn = i[0];
     prev_pc = i;