* bug fix: OPEN reports a more meaningful error when an existing file is
opened for output with :if-exists :new-version. Thanks to Philip
Munksgaard. (lp#455381)
+ * bug fix: DEFSTRUCTs with NIL as a slot name no longer cause strange
+ CLOS-related errors. (lp#633911)
changes in sbcl-1.1.13 relative to sbcl-1.1.12:
* optimization: better distribution of SXHASH over small conses of related