struct menu *menu = current_entry;
while ((menu = menu->parent) != NULL) {
+ struct expr *dup_expr;
+
if (!menu->visibility)
continue;
+ /*
+ * Do not add a reference to the
+ * menu's visibility expression but
+ * use a copy of it. Otherwise the
+ * expression reduction functions
+ * will modify expressions that have
+ * multiple references which can
+ * cause unwanted side effects.
+ */
+ dup_expr = expr_copy(menu->visibility);
+
prop->visible.expr
= expr_alloc_and(prop->visible.expr,
- menu->visibility);
+ dup_expr);
}
}