[Sbcl-help] Problem with SOURCE command

[Leslie P. P. <sk...@vi...>]

Hi,

I've tried an example of using the debugger that MacLachlan
gives in his paper about Python.

I prepared the following file, located in /home/sky/test.lisp:


(declaim (optimize (debug 3)))

(defstruct my-struct (slot nil :type (or integer null)))

(defun source-demo (structs)
  (dolist (struct structs)
    (when (oddp (my-struct-slot struct))
      (return struct))))

(source-demo (list (make-my-struct :slot 0)
                   (make-my-struct :slot 2)
                   (pathname "foo")))

However:

debugger invoked on a TYPE-ERROR in thread #<THREAD "initial thread" RUNNING {A8C75E9}>:
  The value #P"foo" is not of type MY-STRUCT.
[...]
(SOURCE-DEMO (#S(MY-STRUCT :SLOT 0) #S(MY-STRUCT :SLOT 2) #P"foo"))
source:
; file: /home/sky/test.lisp
error finding source: The source path no longer exists.


Is there a known problem with recording or resolving source
locations?

  Thank you,

    Leslie


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