From d0e19e7a7fe3e76d1c08344ff83c9f3e48514a65 Mon Sep 17 00:00:00 2001
From: Tianqi Chen <tqchen@users.noreply.github.com>
Date: Wed, 21 Sep 2016 16:53:38 -0700
Subject: [PATCH] avoid close threadlocal lua state for singleton and cudart
 safety (#174)

---
 include/dmlc/lua.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/dmlc/lua.h b/include/dmlc/lua.h
index 44a51364bfdd..67a5850e3eb2 100644
--- a/include/dmlc/lua.h
+++ b/include/dmlc/lua.h
@@ -455,7 +455,10 @@ inline LuaState::LuaState() {
 }
 
 inline LuaState::~LuaState() {
-  lua_close(L_);
+  if (option_ != kThreadLocal && L_ != nullptr) {
+    // never close threadlocal, for save destruction.
+    lua_close(L_);
+  }
 }
 
 inline LuaState* LuaState::Create_(Option opt) {