From 62e6b5a336688680904edbfd4a7496e2808f3f0b Mon Sep 17 00:00:00 2001
From: SHIRAKATA Kentaro <argrath@ub32.org>
Date: Fri, 22 Oct 2021 02:13:17 +0900
Subject: [PATCH] guard lua_close()

nhl_done() can be called with L == NULL.
So lua_close() should be guarded.
---
 src/nhlua.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/nhlua.c b/src/nhlua.c
index 92a942b92..db4deb6c4 100644
--- a/src/nhlua.c
+++ b/src/nhlua.c
@@ -1375,7 +1375,8 @@ nhl_init(void)
 void
 nhl_done(lua_State *L)
 {
-    lua_close(L);
+    if (L)
+        lua_close(L);
     iflags.in_lua = FALSE;
 }