--- xfce4-taskmanager-a/src/process-tree-model.c	2017-02-25 11:25:41.605366374 +0100
+++ xfce4-taskmanager-b/src/process-tree-model.c	2017-02-25 11:43:30.009506576 +0100
@@ -871,6 +871,24 @@
 	if (G_UNLIKELY (size == 0))
 		return;
 
+        /* Quick fix of bug 12132:
+         *
+         * https://bugzilla.xfce.org/show_bug.cgi?id=12132
+         *  
+         * This callback function receives bad new_order[] array
+         * value. This occurs when filtering is used, filtered model
+         * has no rows and matching row appears. Then, the value of
+         * new_order[0] is 1 and because size of the model indexed
+         * from 0 is 1, getting iter at position 1 returns no/bad
+         * value and segmentation fault occurs in the next function.
+         *  
+         * Here, we are checking for these specific conditions and
+         * correcting the value of new_order[0].
+         */
+        if ((size == 1) && (new_order[0] == 1)) {
+            new_order[0] = 0;
+        }
+
 	not_persist = ! (gtk_tree_model_get_flags (model) & GTK_TREE_MODEL_ITERS_PERSIST);
 
 	/* New list to hold the new order */