Steel Bank Common Lisp (SBCL) 是一款高性能的 Common Lisp 编译器。除了 ANSI Common Lisp 的编译器和运行时系统之外，它还提供了一个交互式环境，包括调试器、统计分析器、代码覆盖工具和许多其他扩展。
SBCL 1.3.20 更新内容：
次要不兼容的更改：DEF{GENERIC,METHOD} no longer accept some illegal lambda lists such as (defgeneric bar (foo &key foo)) or (defgeneric baz (t)) that were accepted before.
优化：a valueless &AUX binding in a BOA constructor does not force all slots reads in safe code to perform a full type check.
优化：ATOMIC-PUSH and ATOMIC-POP generate better code
修复：the low-level debugger would erroneously print - or not print as the case may be - "(bad-address)" for some objects depending whether the --dynamic-space-size argument was used at Lisp startup
修复：a DEFCONSTANT with a non non-eql-comparable object as the value could cause miscompilation if that constant appeared as the default expression for an &OPTIONAL binding
修复：generic function lambda lists are now checked for repeated and otherwise illegal entries.
修复：setting gencgc_verbose = 1 could cause deadlock in fprintf() depending on the platform's stdio implementation. The relevant code has been changed to use snprintf() and write() instead.
下载地址：
http://sbcl.org/platform-table.html
软件详情：http://sbcl.org/news.html
来自:开源中国社区
