lua-deferred: explicitly restore Lua stack across callbacks.

diff --git a/src/core/lua-bindings/lua-deferred.c b/src/core/lua-bindings/lua-deferred.c
index a7e2eba..9e0f3f1 100644 (file)
--- a/src/core/lua-bindings/lua-deferred.c
+++ b/src/core/lua-bindings/lua-deferred.c
@@ -105,9 +105,12 @@ static void deferred_lua_cb(mrp_deferred_t *deferred, void *user_data)
 {
     deferred_lua_t *d   = (deferred_lua_t *)user_data;
     int             one = d->oneshot;
+    int             top;
 
     MRP_UNUSED(deferred);
 
+    top = lua_gettop(d->L);
+
     if (mrp_lua_object_deref_value(d, d->L, d->callback, false)) {
         mrp_lua_push_object(d->L, d);
 
@@ -122,6 +125,8 @@ static void deferred_lua_cb(mrp_deferred_t *deferred, void *user_data)
         mrp_disable_deferred(d->d);
         d->disabled = true;
     }
+
+    lua_settop(d->L, top);
 }