From f9e35627ed26dff4114a1d01ff113d8b4cc91ab5 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Wed, 26 Feb 2025 11:31:10 -0300
Subject: 'lua_State.nci' must be an integer

Lua can easily overflow an unsigned short counting nested calls.
(The limit to this value is the maximum stack size, LUAI_MAXSTACK,
which is currently 1e6.)
---
 lstate.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lstate.h')

diff --git a/lstate.h b/lstate.h
index 050fc35f..f841c232 100644
--- a/lstate.h
+++ b/lstate.h
@@ -290,7 +290,6 @@ struct lua_State {
   CommonHeader;
   lu_byte allowhook;
   TStatus status;
-  unsigned short nci;  /* number of items in 'ci' list */
   StkIdRel top;  /* first free slot in the stack */
   struct global_State *l_G;
   CallInfo *ci;  /* call info for current function */
@@ -306,6 +305,7 @@ struct lua_State {
   ptrdiff_t errfunc;  /* current error handling function (stack index) */
   l_uint32 nCcalls;  /* number of nested non-yieldable or C calls */
   int oldpc;  /* last pc traced */
+  int nci;  /* number of items in 'ci' list */
   int basehookcount;
   int hookcount;
   volatile l_signalT hookmask;
-- 
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