无法使用haskell的glade xml文件

Question

我不确定我是否应该打个招呼，这是我在这里的第一篇文章。

无论如何，我正在关注gtk2hs website的林间空地教程。代码编译正确，但是当我尝试执行它时，我得到了这个错误。

(hellogtk2hs:8670): libglade-WARNING **: Expected <glade-interface>.  Got <interface>.
(hellogtk2hs:8670): libglade-WARNING **: did not finish in PARSER_FINISH state
hellogtk2hs: user error (Pattern match failure in do expression at HelloGtk2Hs.hs:8:8-15)

这是我的林间空地文件。

<?xml version="1.0" encoding="UTF-8"?>
<interface>
  <!-- interface-requires gtk+ 3.0 -->
  <object class="GtkWindow" id="window1">
    <property name="can_focus">False</property>
    <child>
      <object class="GtkBox" id="box1">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <property name="orientation">vertical</property>
        <property name="homogeneous">True</property>
        <child>
          <object class="GtkLabel" id="label1">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <property name="label" translatable="yes">Write your name here: </property>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">0</property>
          </packing>
        </child>
        <child>
          <object class="GtkEntry" id="entry1">
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="invisible_char">●</property>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">1</property>
          </packing>
        </child>
        <child>
          <object class="GtkBox" id="box2">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <property name="homogeneous">True</property>
            <child>
              <object class="GtkButton" id="button1">
                <property name="label">gtk-apply</property>
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="receives_default">True</property>
                <property name="use_stock">True</property>
                <property name="always_show_image">True</property>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="fill">True</property>
                <property name="position">0</property>
              </packing>
            </child>
            <child>
              <object class="GtkButton" id="button2">
                <property name="label">gtk-close</property>
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="receives_default">True</property>
                <property name="use_stock">True</property>
                <property name="always_show_image">True</property>
              </object>
              <packing>
                <property name="expand">False</property>
                <property name="fill">True</property>
                <property name="position">1</property>    
              </packing>
            </child>
          </object>
          <packing>
            <property name="expand">False</property>
            <property name="fill">True</property>
            <property name="position">2</property>
          </packing>
        </child>
      </object>
    </child>
  </object>
</interface>

glade文件与我的源代码位于同一目录中。源代码是教程中的完整副本。我之前从未使用过林间空地，所以我不知道什么是错误的。

我不得不将ghc从7.6降级到7.4.2。我正在使用glade 3.14.1，所有其他软件包都是通过cabal安装的，因此它们是当前版本的。

如果我用 glade-interface 切换界面，在开头和结尾时它仍会抱怨。

(hellogtk2hs:9636): libglade-WARNING **: Unexpected element <object> inside <glade-interface>.
hellogtk2hs: user error (glade.xmlGetWidget: no object named "window1" in the glade file)

如果用小部件更改所有对象标签，我会得到这个

(hellogtk2hs:9668): GLib-GObject-ERROR **: cannot create instance of abstract (non-instantiatable) type `GtkBox'
`trap' para punto de parada/seguimiento

通过这样做我得到的错误更少，但它仍然不起作用。