From c782f7d775b6fe8784e1b339e9a0d6e522a2357f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Le=20Corre?= <sebastien.lecorre@orange.com>
Date: Wed, 13 Jan 2021 04:09:47 +0100
Subject: [PATCH] Validate function before callback. Fixes #482

---
 widget/fs.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/widget/fs.lua b/widget/fs.lua
index 48d80b7..b3a2dad 100644
--- a/widget/fs.lua
+++ b/widget/fs.lua
@@ -137,7 +137,7 @@ local function factory(args)
     function fs.update(callback)
         Gio.Async.start(gears.protected_call.call)(function()
             update_synced()
-            if callback then
+            if type(callback) == "function" and callback then
                 callback()
             end
         end)