From e4224137f1972ce46dcb6db6686afa4e870c3d41 Mon Sep 17 00:00:00 2001
From: Cloud Wu <cloudwu@gmail.com>
Date: Wed, 28 Aug 2019 20:19:15 +0800
Subject: [PATCH] fix #1078

---
 3rd/lua/lstring.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/3rd/lua/lstring.c b/3rd/lua/lstring.c
index 893ed8a8..cfff68eb 100644
--- a/3rd/lua/lstring.c
+++ b/3rd/lua/lstring.c
@@ -64,6 +64,8 @@ int luaS_eqshrstr (TString *a, TString *b) {
 }
 
 void luaS_share (TString *ts) {
+  if (ts == NULL)
+    return;
   makeshared(ts);
   ts->id = ATOM_DEC(&STRID);
 }