diff --git a/src/lua.rs b/src/lua.rs
index 692d16d..aaa17a1 100644
--- a/src/lua.rs
+++ b/src/lua.rs
@@ -968,7 +968,7 @@ impl<'lua, T: UserData> UserDataMethods<'lua, T> {
     /// back to the user-provided metamethod if no regular method was found.
     pub fn add_method<M>(&mut self, name: &str, method: M)
     where
-        M: 'lua + for<'a> FnMut(&'lua Lua, &'a T, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
+        M: 'static + for<'a> FnMut(&'lua Lua, &'a T, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
     {
         self.methods.insert(
             name.to_owned(),
@@ -983,7 +983,7 @@ impl<'lua, T: UserData> UserDataMethods<'lua, T> {
     /// [`add_method`]: #method.add_method
     pub fn add_method_mut<M>(&mut self, name: &str, method: M)
     where
-        M: 'lua + for<'a> FnMut(&'lua Lua, &'a mut T, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
+        M: 'static + for<'a> FnMut(&'lua Lua, &'a mut T, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
     {
         self.methods.insert(
             name.to_owned(),
@@ -1000,7 +1000,7 @@ impl<'lua, T: UserData> UserDataMethods<'lua, T> {
     /// [`add_method_mut`]: #method.add_method_mut
     pub fn add_function<F>(&mut self, name: &str, function: F)
     where
-        F: 'lua + FnMut(&'lua Lua, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
+        F: 'static + FnMut(&'lua Lua, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
     {
         self.methods.insert(name.to_owned(), Box::new(function));
     }
@@ -1015,7 +1015,7 @@ impl<'lua, T: UserData> UserDataMethods<'lua, T> {
     /// [`add_meta_function`]: #method.add_meta_function
     pub fn add_meta_method<M>(&mut self, meta: MetaMethod, method: M)
     where
-        M: 'lua + for<'a> FnMut(&'lua Lua, &'a T, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
+        M: 'static + for<'a> FnMut(&'lua Lua, &'a T, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
     {
         self.meta_methods.insert(meta, Self::box_method(method));
     }
@@ -1030,7 +1030,7 @@ impl<'lua, T: UserData> UserDataMethods<'lua, T> {
     /// [`add_meta_function`]: #method.add_meta_function
     pub fn add_meta_method_mut<M>(&mut self, meta: MetaMethod, method: M)
     where
-        M: 'lua + for<'a> FnMut(&'lua Lua, &'a mut T, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
+        M: 'static + for<'a> FnMut(&'lua Lua, &'a mut T, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
     {
         self.meta_methods.insert(meta, Self::box_method_mut(method));
     }
@@ -1042,14 +1042,14 @@ impl<'lua, T: UserData> UserDataMethods<'lua, T> {
     /// userdata of type `T`.
     pub fn add_meta_function<F>(&mut self, meta: MetaMethod, function: F)
     where
-        F: 'lua + FnMut(&'lua Lua, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
+        F: 'static + FnMut(&'lua Lua, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
     {
         self.meta_methods.insert(meta, Box::new(function));
     }
 
     fn box_method<M>(mut method: M) -> Callback<'lua>
     where
-        M: 'lua + for<'a> FnMut(&'lua Lua, &'a T, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
+        M: 'static + for<'a> FnMut(&'lua Lua, &'a T, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
     {
         Box::new(move |lua, mut args| if let Some(front) = args.pop_front() {
             let userdata = AnyUserData::from_lua(front, lua)?;
@@ -1065,7 +1065,7 @@ impl<'lua, T: UserData> UserDataMethods<'lua, T> {
 
     fn box_method_mut<M>(mut method: M) -> Callback<'lua>
     where
-        M: 'lua + for<'a> FnMut(&'lua Lua, &'a mut T, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
+        M: 'static + for<'a> FnMut(&'lua Lua, &'a mut T, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
     {
         Box::new(move |lua, mut args| if let Some(front) = args.pop_front() {
             let userdata = AnyUserData::from_lua(front, lua)?;
@@ -1514,7 +1514,7 @@ impl Lua {
     /// ```
     pub fn create_function<'lua, F>(&'lua self, func: F) -> Function<'lua>
     where
-        F: 'lua + FnMut(&'lua Lua, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
+        F: 'static + FnMut(&'lua Lua, MultiValue<'lua>) -> Result<MultiValue<'lua>>,
     {
         self.create_callback_function(Box::new(func))
     }
diff --git a/src/tests.rs b/src/tests.rs
index bf64b6b..756226f 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -208,32 +208,27 @@ fn test_bind() {
 
 #[test]
 fn test_rust_function() {
-    let mut captured_var = 2;
-    {
-        let lua = Lua::new();
-        let globals = lua.globals();
-        lua.exec::<()>(
-            r#"
-                function lua_function()
-                    return rust_function()
-                end
+    let lua = Lua::new();
+    let globals = lua.globals();
+    lua.exec::<()>(
+        r#"
+            function lua_function()
+                return rust_function()
+            end
 
-                -- Test to make sure chunk return is ignored
-                return 1
-            "#,
-            None,
-        ).unwrap();
+            -- Test to make sure chunk return is ignored
+            return 1
+        "#,
+        None,
+    ).unwrap();
 
-        let lua_function = globals.get::<_, Function>("lua_function").unwrap();
-        let rust_function = lua.create_function(|lua, _| {
-            captured_var = 42;
-            lua.pack("hello")
-        });
+    let lua_function = globals.get::<_, Function>("lua_function").unwrap();
+    let rust_function = lua.create_function(|lua, _| {
+        lua.pack("hello")
+    });
 
-        globals.set("rust_function", rust_function).unwrap();
-        assert_eq!(lua_function.call::<_, String>(()).unwrap(), "hello");
-    }
-    assert_eq!(captured_var, 42);
+    globals.set("rust_function", rust_function).unwrap();
+    assert_eq!(lua_function.call::<_, String>(()).unwrap(), "hello");
 }
 
 #[test]
@@ -368,17 +363,6 @@ fn test_scope() {
     assert_eq!(tin.get::<_, i64>(1).unwrap(), 1);
     assert_eq!(tin.get::<_, i64>(2).unwrap(), 2);
     assert_eq!(tin.get::<_, i64>(3).unwrap(), 3);
-
-    // Should not compile, don't know how to test that
-    // struct UserData;
-    // impl UserData for UserData {};
-    // let userdata_ref;
-    // {
-    //     let touter = globals.get::<_, Table>("touter").unwrap();
-    //     touter.set("userdata", lua.create_userdata(UserData).unwrap()).unwrap();
-    //     let userdata = touter.get::<_, AnyUserData>("userdata").unwrap();
-    //     userdata_ref = userdata.borrow::<UserData>();
-    // }
 }
 
 #[test]
@@ -907,3 +891,29 @@ fn coroutine_panic() {
     let thrd: Thread = lua.create_thread(thrd_main);
     thrd.resume::<_, ()>(()).unwrap();
 }
+
+
+// Need to use compiletest-rs or similar to make sure these don't compile.
+/*
+#[test]
+fn should_not_compile() {
+    let lua = Lua::new();
+    let globals = lua.globals();
+
+    // Should not allow userdata borrow to outlive lifetime of AnyUserData handle
+    struct MyUserData;
+    impl UserData for MyUserData {};
+    let userdata_ref;
+    {
+        let touter = globals.get::<_, Table>("touter").unwrap();
+        touter.set("userdata", lua.create_userdata(MyUserData)).unwrap();
+        let userdata = touter.get::<_, AnyUserData>("userdata").unwrap();
+        userdata_ref = userdata.borrow::<MyUserData>();
+    }
+
+    // Should not allow self borrow of lua, it can change addresses
+    globals.set("boom", lua.create_function(|_, _| {
+        lua.pack(lua.eval::<i32>("1 + 1", None)?)
+    })).unwrap();
+}
+*/