On Wed, 1 Mar 2017 22:35:00 +0100, Mike Wey wrote:

I am not able to reproduce this with the Latest GtkD and GTK 3.22 on

What are you currently using?

I use GTK 3.0 with Gtkd 3.5.1 on Ubuntu 12.04 32 bit.

These warning messages seems to be appear after I click spin button a few times.