[gtk/wip/baedert/for-master: 175/180] stack: assert for some assumptions




commit d443c88f43a553309402c117b88a45c606b5b687
Author: Timm Bäder <mail baedert org>
Date:   Thu Oct 15 18:52:45 2020 +0200

    stack: assert for some assumptions

 gtk/gtkstack.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gtk/gtkstack.c b/gtk/gtkstack.c
index a9a0902c23..8497925a81 100644
--- a/gtk/gtkstack.c
+++ b/gtk/gtkstack.c
@@ -2166,6 +2166,9 @@ gtk_stack_snapshot_cube (GtkWidget   *widget,
   GtkStackPrivate *priv = gtk_stack_get_instance_private (stack);
   double progress = gtk_progress_tracker_get_progress (&priv->tracker, FALSE);
 
+  g_assert (priv->active_transition_type == GTK_STACK_TRANSITION_TYPE_ROTATE_RIGHT ||
+            priv->active_transition_type == GTK_STACK_TRANSITION_TYPE_ROTATE_LEFT);
+
   if (priv->active_transition_type == GTK_STACK_TRANSITION_TYPE_ROTATE_RIGHT)
     progress = 1 - progress;
 


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