From 1705bde0ebfde92501a966013d7093f0f4c778c2 Mon Sep 17 00:00:00 2001
From: XmiliaH <xmilia.hermit@gmail.com>
Date: Thu, 31 Mar 2022 15:32:56 +0200
Subject: [PATCH] Nicer print output for itern special key

---
 src/lj_strfmt.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/lj_strfmt.c b/src/lj_strfmt.c
index 5c808290..9a67decf 100644
--- a/src/lj_strfmt.c
+++ b/src/lj_strfmt.c
@@ -521,6 +521,11 @@ GCstr * LJ_FASTCALL lj_strfmt_obj(lua_State *L, cTValue *o)
     return lj_str_newlit(L, "true");
   } else {
     char buf[8+2+2+16], *p = buf;
+    if (tvislightud(o) && o->u32.hi == LJ_KEYINDEX) {
+      p = lj_buf_wmem(p, "iterator@", 9);
+      p = lj_strfmt_wint(p, o->u32.lo);
+      return lj_str_new(L, buf, (size_t)(p - buf));
+    }
     p = lj_buf_wmem(p, lj_typename(o), (MSize)strlen(lj_typename(o)));
     *p++ = ':'; *p++ = ' ';
     if (tvisfunc(o) && isffunc(funcV(o))) {