Merge branch 'master' into 'main'

Reset chars_changed_stamp in _gtk_text_btree_unref

Closes #5544

See merge request GNOME/gtk!6087

diff --cc gtk/gtktextbtree.c
index 78f07bcffcc5bc8736b802e52d90896a2bb8c218,a625e86735fb9ecedefe04f2325eed97546717b7..41660839671d58059e9ce2235bcfe2517f8ff159
--- 1/gtk/gtktextbtree.c
--- 2/gtk/gtktextbtree.c
+++ b/gtk/gtktextbtree.c
@@@ -512,8 -512,9 +512,9 @@@ _gtk_text_btree_unref (GtkTextBTree *tr
        tree->insert_mark = NULL;
        g_object_unref (tree->selection_bound_mark);
        tree->selection_bound_mark = NULL;
+       tree->chars_changed_stamp = 0;
  
 -      g_slice_free (GtkTextBTree, tree);
 +      g_free (tree);
      }
  }