gtk图标显示异常，最小化等图标无法显示

(Project1.exe:10480): Gtk-WARNING **: Could not find the icon 'window-minimize-symbolic-ltr'. The 'hicolor' theme
was not found either, perhaps you need to install it.
You can get a copy from:
        http://icon-theme.freedesktop.org/releases
//出现这个警告