From: Benjamin Otte <otte@redhat.com>
Date: Thu, 30 Mar 2023 06:29:32 +0000 (+0200)
Subject: listbase: Clear any newly set adjustments
X-Git-Tag: archive/raspbian/4.12.3+ds-1+rpi1~1^2^2^2~22^2~1^2~475^2
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=dbff49b5;p=gtk4.git

listbase: Clear any newly set adjustments

The scrolling code assumes the adjustment values are up to date or
it crashes and before we've run size_allocate() we haven't update them.

Fixes a crash in the gtk-demo scrollinfo that would set the adjustments
with random values (via ScrolledWindow.set_child()) and then scroll in a
tick callback right before the (first) size_allocate().
---

diff --git a/gtk/gtklistbase.c b/gtk/gtklistbase.c
index c0e2448279..0c7df53aa0 100644
--- a/gtk/gtklistbase.c
+++ b/gtk/gtklistbase.c
@@ -731,6 +731,8 @@ gtk_list_base_set_adjustment (GtkListBase    *self,
 
   if (adjustment == NULL)
     adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
+  else
+    gtk_adjustment_configure (adjustment, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
   g_object_ref_sink (adjustment);
 
   gtk_list_base_clear_adjustment (self, orientation);