diff --git a/modules/module-lua-scripting/pod.c b/modules/module-lua-scripting/pod.c
index 181005f7..206826fd 100644
--- a/modules/module-lua-scripting/pod.c
+++ b/modules/module-lua-scripting/pod.c
@@ -921,7 +921,7 @@ push_luapod (lua_State *L, WpSpaPod *pod, WpSpaIdValue field_idval)
   /* Boolean */
   else if (wp_spa_pod_is_boolean (pod)) {
     gboolean value = FALSE;
-    wp_spa_pod_get_boolean (pod, &value);
+    g_warn_if_fail (wp_spa_pod_get_boolean (pod, &value));
     lua_pushboolean (L, value);
   }
 
@@ -930,7 +930,7 @@ push_luapod (lua_State *L, WpSpaPod *pod, WpSpaIdValue field_idval)
     guint32 value = 0;
     WpSpaIdTable idtable = NULL;
     WpSpaIdValue idval = NULL;
-    wp_spa_pod_get_id (pod, &value);
+    g_warn_if_fail (wp_spa_pod_get_id (pod, &value));
     if (field_idval && SPA_TYPE_Id ==
             wp_spa_id_value_get_value_type (field_idval, &idtable)) {
       idval = wp_spa_id_table_find_value (idtable, value);
@@ -944,7 +944,7 @@ push_luapod (lua_State *L, WpSpaPod *pod, WpSpaIdValue field_idval)
   /* Int */
   else if (wp_spa_pod_is_int (pod)) {
     gint value = 0;
-    wp_spa_pod_get_int (pod, &value);
+    g_warn_if_fail (wp_spa_pod_get_int (pod, &value));
     lua_pushinteger (L, value);
   }
 
@@ -958,21 +958,21 @@ push_luapod (lua_State *L, WpSpaPod *pod, WpSpaIdValue field_idval)
   /* Float */
   else if (wp_spa_pod_is_float (pod)) {
     float value = 0;
-    wp_spa_pod_get_float (pod, &value);
+    g_warn_if_fail (wp_spa_pod_get_float (pod, &value));
     lua_pushnumber (L, value);
   }
 
   /* Double */
   else if (wp_spa_pod_is_double (pod)) {
     double value = 0;
-    wp_spa_pod_get_double (pod, &value);
+    g_warn_if_fail (wp_spa_pod_get_double (pod, &value));
     lua_pushnumber (L, value);
   }
 
   /* String */
   else if (wp_spa_pod_is_string (pod)) {
     const gchar *value = NULL;
-    wp_spa_pod_get_string (pod, &value);
+    g_warn_if_fail (wp_spa_pod_get_string (pod, &value));
     lua_pushstring (L, value);
   }
 
@@ -980,7 +980,7 @@ push_luapod (lua_State *L, WpSpaPod *pod, WpSpaIdValue field_idval)
   else if (wp_spa_pod_is_bytes (pod)) {
     gconstpointer value = NULL;
     guint32 size = 0;
-    wp_spa_pod_get_bytes (pod, &value, &size);
+    g_warn_if_fail (wp_spa_pod_get_bytes (pod, &value, &size));
     char str[size + 1];
     for (guint i = 0; i < size; i++)
       str[i] = ((const gchar *)value)[i];
@@ -991,7 +991,7 @@ push_luapod (lua_State *L, WpSpaPod *pod, WpSpaIdValue field_idval)
   /* Pointer */
   else if (wp_spa_pod_is_pointer (pod)) {
     gconstpointer value = NULL;
-    wp_spa_pod_get_pointer (pod, &value);
+    g_warn_if_fail (wp_spa_pod_get_pointer (pod, &value));
     if (!value)
       lua_pushnil (L);
     else
@@ -1001,14 +1001,14 @@ push_luapod (lua_State *L, WpSpaPod *pod, WpSpaIdValue field_idval)
   /* Fd */
   else if (wp_spa_pod_is_fd (pod)) {
     gint64 value = 0;
-    wp_spa_pod_get_fd (pod, &value);
+    g_warn_if_fail (wp_spa_pod_get_fd (pod, &value));
     lua_pushinteger (L, value);
   }
 
   /* Rectangle */
   else if (wp_spa_pod_is_rectangle (pod)) {
     guint32 width = 0, height = 0;
-    wp_spa_pod_get_rectangle (pod, &width, &height);
+    g_warn_if_fail (wp_spa_pod_get_rectangle (pod, &width, &height));
     lua_newtable (L);
     lua_pushstring (L, "Rectangle");
     lua_setfield (L, -2, "pod_type");
@@ -1021,7 +1021,7 @@ push_luapod (lua_State *L, WpSpaPod *pod, WpSpaIdValue field_idval)
   /* Fraction */
   else if (wp_spa_pod_is_fraction (pod)) {
     guint32 num = 0, denom = 0;
-    wp_spa_pod_get_fraction (pod, &num, &denom);
+    g_warn_if_fail (wp_spa_pod_get_fraction (pod, &num, &denom));
     lua_newtable (L);
     lua_pushstring (L, "Fraction");
     lua_setfield (L, -2, "pod_type");
@@ -1038,7 +1038,7 @@ push_luapod (lua_State *L, WpSpaPod *pod, WpSpaIdValue field_idval)
     const gchar *id_name = NULL;
     g_auto (GValue) item = G_VALUE_INIT;
     g_autoptr (WpIterator) it = NULL;
-    wp_spa_pod_get_object (pod, &id_name, NULL);
+    g_warn_if_fail (wp_spa_pod_get_object (pod, &id_name, NULL));
     lua_newtable (L);
     lua_pushstring (L, "Object");
     lua_setfield (L, -2, "pod_type");
@@ -1052,7 +1052,7 @@ push_luapod (lua_State *L, WpSpaPod *pod, WpSpaIdValue field_idval)
       g_autoptr (WpSpaPod) val = NULL;
       //FIXME: this is suboptimal because _get_property() converts
       // the key to a short name and we convert it back
-      wp_spa_pod_get_property (prop, &key, &val);
+      g_warn_if_fail (wp_spa_pod_get_property (prop, &key, &val));
       if (key) {
         push_luapod (L, val,
             wp_spa_id_table_find_value_from_short_name (values_table, key));
@@ -1090,7 +1090,8 @@ push_luapod (lua_State *L, WpSpaPod *pod, WpSpaIdValue field_idval)
       guint32 offset = 0;
       const char *type_name = NULL;
       g_autoptr (WpSpaPod) val = NULL;
-      wp_spa_pod_get_control (control, &offset, &type_name, &val);
+      g_warn_if_fail (wp_spa_pod_get_control (control, &offset, &type_name,
+          &val));
       lua_newtable (L);
       lua_pushinteger (L, offset);
       lua_setfield (L, -2, "offset");