From d70a0c91ad42275af1f6f1b6e37c604442b3f0d1 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Thu, 15 Dec 2022 16:44:22 -0300
Subject: Dump/undump reuse strings

A repeated string in a dump is represented as an index to its first
occurence, instead of another copy of the string.
---
 lstrlib.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'lstrlib.c')

diff --git a/lstrlib.c b/lstrlib.c
index 0b4fdbb7..ce07d9bc 100644
--- a/lstrlib.c
+++ b/lstrlib.c
@@ -239,6 +239,7 @@ static int str_dump (lua_State *L) {
   if (l_unlikely(lua_dump(L, writer, &state, strip) != 0))
     return luaL_error(L, "unable to dump given function");
   luaL_pushresult(&state.B);
+  lua_assert(lua_isfunction(L, 1));  /* lua_dump kept that value */
   return 1;
 }
 
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