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cmpltv: don't raise from print-object on a half-built creator #1827

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cmpltv: don't raise from print-object on a half-built creator #1827

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10 changes: 7 additions & 3 deletions src/lisp/kernel/cmp/cmpltv.lisp
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@
;;; The object may be fully initialized or may require further initialization.
(defclass creator (instruction)
((%index :initform nil :initarg :index :accessor index
:type (integer 0))))
:type (or null (integer 0)))))
;;; A creator for which a prototype value (which the eventual LTV will be
;;; similar to) is available.
(defclass vcreator (creator)
Expand All @@ -55,15 +55,19 @@

(defmethod print-object ((object creator) stream)
(print-unreadable-object (object stream :type t)
(format stream "~d" (index object)))
(if (slot-boundp object '%index)
(format stream "~d" (index object))
(write-string "[no index]" stream)))
object)

(defmethod print-object ((object vcreator) stream)
(print-unreadable-object (object stream :type t)
(if (slot-boundp object '%prototype)
(prin1 (prototype object) stream)
(write-string "[no prototype]" stream))
(format stream " ~d" (index object)))
(if (slot-boundp object '%index)
(format stream " ~d" (index object))
(write-string " [no index]" stream)))
object)

;;; An instruction that performs some action for effect. This can include
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