0.8.0.24:

[sbcl.git] / src / code / symbol.lisp

diff --git a/src/code/symbol.lisp b/src/code/symbol.lisp
index 437e199..e1143df 100644 (file)
--- a/src/code/symbol.lisp
+++ b/src/code/symbol.lisp
@@ -156,8 +156,11 @@
   (do ((plist place (cddr plist)))
       ((null plist) default)
     (cond ((atom (cdr plist))
-          (error "~S is a malformed property list."
-                 place))
+          (error 'simple-type-error
+                 :format-control "malformed property list: ~S."
+                 :format-arguments (list place)
+                 :datum (cdr plist)
+                 :expected-type 'cons))
          ((eq (car plist) indicator)
           (return (cadr plist))))))
 
@@ -178,8 +181,11 @@
   (do ((plist place (cddr plist)))
       ((null plist) (values nil nil nil))
     (cond ((atom (cdr plist))
-          (error "~S is a malformed proprty list."
-                 place))
+          (error 'simple-type-error
+                 :format-control "malformed property list: ~S."
+                 :format-arguments (list place)
+                 :datum (cdr plist)
+                 :expected-type 'cons))
          ((memq (car plist) indicator-list)
           (return (values (car plist) (cadr plist) plist))))))