From 94a40bb238092e73f3dc0c3626911a7efa997c22 Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Thu, 23 Sep 2021 19:07:30 +0200
Subject: [PATCH] FFI: Ensure returned string is alive in ffi.typeinfo().

Reported by zhuizhuhaomeng.
---
 src/lib_ffi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/lib_ffi.c b/src/lib_ffi.c
index a29014e5..b4321048 100644
--- a/src/lib_ffi.c
+++ b/src/lib_ffi.c
@@ -573,6 +573,7 @@ LJLIB_CF(ffi_typeinfo)
       setintV(lj_tab_setstr(L, t, lj_str_newlit(L, "sib")), (int32_t)ct->sib);
     if (gcref(ct->name)) {
       GCstr *s = gco2str(gcref(ct->name));
+      if (isdead(G(L), obj2gco(s))) flipwhite(obj2gco(s));
       setstrV(L, lj_tab_setstr(L, t, lj_str_newlit(L, "name")), s);
     }
     lj_gc_check(L);