From e282da498cbf0bd5ea474b38bd61f6a1453d035d Mon Sep 17 00:00:00 2001
From: Roberto I <roberto@inf.puc-rio.br>
Date: Fri, 24 Jul 2026 11:21:24 -0300
Subject: [PATCH] Bug: wrong initialization in result from 'gmatch'

Function returned by 'string.gmatch' can be left in an inconsistent
state after an error.
---
 lstrlib.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lstrlib.c b/lstrlib.c
index 03167161..f748bf88 100644
--- a/lstrlib.c
+++ b/lstrlib.c
@@ -757,7 +757,6 @@ static int nospecials (const char *p, size_t l) {
 static void prepstate (MatchState *ms, lua_State *L,
                        const char *s, size_t ls, const char *p, size_t lp) {
   ms->L = L;
-  ms->matchdepth = MAXCCALLS;
   ms->src_init = s;
   ms->src_end = s + ls;
   ms->p_end = p + lp;
@@ -765,8 +764,8 @@ static void prepstate (MatchState *ms, lua_State *L,
 
 
 static void reprepstate (MatchState *ms) {
+  ms->matchdepth = MAXCCALLS;
   ms->level = 0;
-  lua_assert(ms->matchdepth == MAXCCALLS);
 }