Allegro CL 在调用（读取）函数时冻结

每当我打电话给(read)在 Allegro Common Lisp 9.0 中，调试窗口“中断”（抱歉，我想不出更清晰的术语）：鼠标变成旋转的蓝色死亡轮，窗口拒绝评估任何新输入，尽管它可以仍然可以输入。 IDE 的其他部分不受影响。屏幕看起来像这样：

International Allegro CL Free Express Edition
9.0 [Windows] (Jan 8, 2013 8:45)
Copyright (C) 1985-2012, Franz Inc., Oakland, CA, USA.  All Rights Reserved.

This development copy of Allegro CL is licensed to:
   Allegro CL 9.0 Express user

CG version 9.0 / IDE version 9.0
Loaded options from C:\Users\Noah Dove\Documents\allegro-prefs-9-0-express.cl.

;; Optimization settings: safety 1, space 1, speed 1, debug 2.
;; For a complete description of all compiler switches given the current
;; optimization settings evaluate (EXPLAIN-COMPILER-SETTINGS).

[changing package from "COMMON-LISP-USER" to "COMMON-GRAPHICS-USER"]
CG-USER(1): (read) ; <--- causes window to malfunction. 
                   ;  any further input is not evaluated.

窗口底部的状态文本停留在：

"reading and evaluating 'read'..."

知道发生了什么事吗？我想做的只是基本的控制台 io。

这个问题好像可以通过补丁解决cg_cg-文本编辑窗格_001 http://www.franz.com/support/patches/log/9.0/#cg_cg-text-edit-pane_001:

Date posted: Mon Jan 28 09:26:04 PST 2013
Patch names: code/cg-text-edit-pane.001,
             update/pjk001.001,
             update/pjl002.001
Description: The code for doing lisp reading in text-edit-pane windows and
             widgets was out-of-date with the conversion of Common Graphics
             to the Unicode version of the Windows API.
             fresh-line erroneously printed a newline just after a blocking
             read.
             Lisp reading was broken in IDE listeners.
Impact:      recommended

下载并安装新补丁：

• 选择菜单“安装”->“新补丁”
• 单击“列出新补丁”
  确保您看到这些补丁
• Leave the "Download all new and updated patches" radio button checked
  I recommend this, so you get all current fixes and improvements
  Alternatively, you may:
  • 仅检查这些补丁
  • 选中“仅下载选定的补丁（上面选中的补丁）”单选按钮
• 点击“下载”

出现一条消息，表明该过程尚未结束：

• 关闭所有 Allegro CL 实例
• Run update.exe
  它将使用下载的补丁重建官方映像

Now, (read)在 IDE 侦听器中工作。