From 37165a8201734fb91cd23236b180ca26bd168b69 Mon Sep 17 00:00:00 2001
From: kyren <kerriganw@gmail.com>
Date: Tue, 4 Sep 2018 03:38:22 -0400
Subject: [PATCH] Don't leak userdata if the metatable creation errors or
 panics

---
 src/lua.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/lua.rs b/src/lua.rs
index 4284c8c..4ea11c2 100644
--- a/src/lua.rs
+++ b/src/lua.rs
@@ -970,14 +970,14 @@ impl Lua {
         let _sg = StackGuard::new(self.state);
         assert_stack(self.state, 4);
 
+        let ud_index = self.userdata_metatable::<T>()?;
         push_userdata::<RefCell<T>>(self.state, RefCell::new(data))?;
 
         ffi::lua_rawgeti(
             self.state,
             ffi::LUA_REGISTRYINDEX,
-            self.userdata_metatable::<T>()? as ffi::lua_Integer,
+            ud_index as ffi::lua_Integer,
         );
-
         ffi::lua_setmetatable(self.state, -2);
 
         Ok(AnyUserData(self.pop_ref()))