1.0.15.3: Have PROBE-FILE return NIL whenever a truename can't be found.

[sbcl.git] / src / pcl / wrapper.lisp

diff --git a/src/pcl/wrapper.lisp b/src/pcl/wrapper.lisp
index 1e8b2f8..eb567cd 100644 (file)
--- a/src/pcl/wrapper.lisp
+++ b/src/pcl/wrapper.lisp
@@ -152,6 +152,9 @@
     (remhash owrapper *previous-nwrappers*)
     (setf (gethash nwrapper *previous-nwrappers*) new-previous)))
 
+;;; FIXME: This is not a good name: part of the constract here is that
+;;; we return the valid wrapper, which is not obvious from the name
+;;; (or the names of our callees.)
 (defun check-wrapper-validity (instance)
   (let* ((owrapper (wrapper-of instance))
          (state (layout-invalid owrapper)))
@@ -187,6 +190,12 @@
 (defun check-obsolete-instance (instance)
   (when (invalid-wrapper-p (layout-of instance))
     (check-wrapper-validity instance)))
+
+(defun valid-wrapper-of (instance)
+  (let ((wrapper (wrapper-of instance)))
+    (if (invalid-wrapper-p wrapper)
+        (check-wrapper-validity instance)
+        wrapper)))
 \f
 ;;;  NIL: means nothing so far, no actual arg info has NILs in the
 ;;;  metatype.