X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fcompiler-deftype.lisp;h=c4a92a5c8c2111978cd00f2293209579a1ba366f;hb=158f220d2e6b44e48806480d6498466b9fc7eb62;hp=20b08b5e0d46b73875aebd43add82d4037da4848;hpb=63cef087068afc157283c0a05ae1f16b962303aa;p=sbcl.git

diff --git a/src/compiler/compiler-deftype.lisp b/src/compiler/compiler-deftype.lisp
index 20b08b5..c4a92a5 100644
--- a/src/compiler/compiler-deftype.lisp
+++ b/src/compiler/compiler-deftype.lisp
@@ -14,14 +14,16 @@
 (/show0 "compiler-deftype.lisp 14")
 
 (defun %compiler-deftype (name expander &optional doc)
+  (with-single-package-locked-error
+      (:symbol name "defining ~A as a type specifier"))
   (ecase (info :type :kind name)
     (:primitive
      (when *type-system-initialized*
        (error "illegal to redefine standard type: ~S" name)))
     (:instance
      (warn "The class ~S is being redefined to be a DEFTYPE." name)
-     (undefine-structure (layout-info (class-layout (sb!xc:find-class name))))
-     (setf (class-cell-class (find-class-cell name)) nil)
+     (undefine-structure (layout-info (classoid-layout (find-classoid name))))
+     (setf (classoid-cell-classoid (find-classoid-cell name :create t)) nil)
      (setf (info :type :compiler-layout name) nil)
      (setf (info :type :kind name) :defined))
     (:defined