I get this warning from gcc:

    test.c:28: warning: initialization from incompatible pointer type

When using compiling the following code. The on_test_command callback is not properly cast with G_CALLBACK() when initializing the static array in the C code.

/* 
 * valac --pkg gtk+-2.0 -o test test.vala
 */

using GLib;
using Gtk;

namespace Test {
	public class Test : GLib.Object {

		private ActionGroup actions;

		private static const ActionEntry[] COMMAND_ACTIONS = {
			{ "test-command", null, "Test Command", "",
			  "Description of test command.", on_test_command }
		};

		construct {
			actions = new ActionGroup("test-group");
			actions.add_actions(COMMAND_ACTIONS, this);
		}

		private void on_test_command (Action action) {
			stdout.printf ("blah\n");
		}

		public static void main(string[] args) {
			var test = new Test();
		}
	}
}