From 8c23d6aad7f39d58c4ca949426a3f18e900a9485 Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Wed, 19 Aug 2026 20:56:02 +0200
Subject: [PATCH] Fix unpack() recording.

Thanks to Christian Clason and Justin M. Keyes. #1513
---
 src/lj_ffrecord.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lj_ffrecord.c b/src/lj_ffrecord.c
index 20e0455f..41dee1ca 100644
--- a/src/lj_ffrecord.c
+++ b/src/lj_ffrecord.c
@@ -336,7 +336,7 @@ static void LJ_FASTCALL recff_unpack(jit_State *J, RecordFFData *rd)
   }
   /* Ending index. */
   trend = J->base[2];
-  if (tref_isnil(trend)) {  /* Default end = #t. */
+  if (J->maxslot < 3 || tref_isnil(trend)) {  /* Default end = #t. */
     end = (int32_t)lj_tab_len(t);
     trend = emitir(IRTI(IR_ALEN), trtab, TREF_NIL);
   } else {