X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fsymbol.lisp;h=e1143df7eb3f144970e9b81e1412c751cd44105f;hb=58084279740fc96c6ffcd14e86dca73b71b7c288;hp=437e199532a842105f000091ae3239d03f2393d6;hpb=4ae1b794a5d6a90794468cf8017f5307f2c30dfe;p=sbcl.git

diff --git a/src/code/symbol.lisp b/src/code/symbol.lisp
index 437e199..e1143df 100644
--- 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))))))