Fix clippy warnings

Author: khvzak

Cargo.toml

@@ -57,6 +57,7 @@ erased-serde = { version = "0.4", optional = true }
 serde-value = { version = "0.7", optional = true }
 parking_lot = { version = "0.12", features = ["arc_lock"] }
 anyhow = { version = "1.0", optional = true }
+rustversion = "1.0"
 
 ffi = { package = "mlua-sys", version = "0.6.6", path = "mlua-sys" }
 

src/memory.rs

@@ -18,15 +18,31 @@ pub(crate) struct MemoryState {
 }
 
 impl MemoryState {
+    #[cfg(feature = "luau")]
     #[inline]
     pub(crate) unsafe fn get(state: *mut ffi::lua_State) -> *mut Self {
         let mut mem_state = ptr::null_mut();
-        #[cfg(feature = "luau")]
-        {
-            ffi::lua_getallocf(state, &mut mem_state);
-            mlua_assert!(!mem_state.is_null(), "Luau state has no allocator userdata");
+        ffi::lua_getallocf(state, &mut mem_state);
+        mlua_assert!(!mem_state.is_null(), "Luau state has no allocator userdata");
+        mem_state as *mut MemoryState
+    }
+
+    #[cfg(not(feature = "luau"))]
+    #[rustversion::since(1.85)]
+    #[inline]
+    pub(crate) unsafe fn get(state: *mut ffi::lua_State) -> *mut Self {
+        let mut mem_state = ptr::null_mut();
+        if !ptr::fn_addr_eq(ffi::lua_getallocf(state, &mut mem_state), ALLOCATOR) {
+            mem_state = ptr::null_mut();
         }
-        #[cfg(not(feature = "luau"))]
+        mem_state as *mut MemoryState
+    }
+
+    #[cfg(not(feature = "luau"))]
+    #[rustversion::before(1.85)]
+    #[inline]
+    pub(crate) unsafe fn get(state: *mut ffi::lua_State) -> *mut Self {
+        let mut mem_state = ptr::null_mut();
         if ffi::lua_getallocf(state, &mut mem_state) != ALLOCATOR {
             mem_state = ptr::null_mut();
         }

src/state.rs

@@ -1809,8 +1809,8 @@ impl Lua {
         let state = lua.state();
         unsafe {
             let mut unref_list = (*lua.extra.get()).registry_unref_list.lock();
-            let unref_list = mem::replace(&mut *unref_list, Some(Vec::new()));
-            for id in mlua_expect!(unref_list, "unref list not set") {
+            let unref_list = unref_list.replace(Vec::new());
+            for id in mlua_expect!(unref_list, "unref list is not set") {
                 ffi::luaL_unref(state, ffi::LUA_REGISTRYINDEX, id);
             }
         }