From ba93ca82c66b572b677ce120008405af493b410c Mon Sep 17 00:00:00 2001
From: Guillaume Gomez <guillaume1.gomez@gmail.com>
Date: Fri, 22 Apr 2022 16:47:49 +0200
Subject: [PATCH] Add missing GTK initialization check

---
 gtk/src/subclass/scrolled_window.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gtk/src/subclass/scrolled_window.rs b/gtk/src/subclass/scrolled_window.rs
index 1e94a362a778..385e542a4cfa 100644
--- a/gtk/src/subclass/scrolled_window.rs
+++ b/gtk/src/subclass/scrolled_window.rs
@@ -71,6 +71,10 @@ unsafe impl<T: ScrolledWindowImpl> IsSubclassable<T> for ScrolledWindow {
     fn class_init(class: &mut ::glib::Class<Self>) {
         Self::parent_class_init::<T>(class);
 
+        if !crate::rt::is_initialized() {
+            panic!("GTK has to be initialized first");
+        }
+
         let klass = class.as_mut();
         klass.move_focus_out = Some(window_move_focus_out::<T>);
         klass.scroll_child = Some(window_scroll_child::<T>);