eieio-persistent-validate/fix-slot-value: Wrong type argument: arrayp, n

Hi,

I am haunted by a:

eieio-persistent-validate/fix-slot-value: Wrong type argument: arrayp, nil

error, when trying to load a previously created project, or when trying
to load files from such projects. Currently I cannot use ede at all. In
the following I will describe a stripped down procedure how this error
occurs on my system. Any help would be most appreciated.

Regards,
Xaver


Prolog:
-------
- I'm running GNU Emacs 24.3.1 (x86_64-unknown-linux-gnu, GTK+ Version
3.10.4)

- Torso of an init.el:

(global-ede-mode 1)
(setq ede-project-directories t)


Step 1
------
- Created new empty directory 'khl'
- Started emacs in this directory
- Used ede-new to generate new Automake project
- Created single target 'mmm', type program, named 'tessi' in directory
'khl'
- Added single *.cc file 'test.cc' to target 'mmm':

int main() {
  return 0;
}

- The Project.ede files then reads:

;; Object mmm
;; EDE Project Files are auto generated: Do Not Edit
(ede-proj-project "mmm"
  :file "Project.ede"
  :name "mmm"
  :targets (list
   (ede-proj-target-makefile-program "tessi"
    :name "tessi"
    :path ""
    :source '("test.cc")
    )
   )
  :makefile-type 'Makefile.am
  )

- Compiled the project with C-c . C
- After that the directory 'khl' contains

drwxr-xr-x  4 xxxxxx users   4096 Aug 11 19:29 ./
drwxr-xr-x 89 xxxxxx users   4096 Aug 11 13:50 ../
-rw-r--r--  1 xxxxxx users  38803 Aug 11 19:26 aclocal.m4
-rw-r--r--  1 xxxxxx users     33 Aug 11 19:26 AUTHORS
drwxr-xr-x  2 xxxxxx users   4096 Aug 11 19:29 autom4te.cache/
-rw-r--r--  1 xxxxxx users      1 Aug 11 19:26 ChangeLog
-rw-r--r--  1 xxxxxx users    722 Aug 11 19:26 config.h
-rw-r--r--  1 xxxxxx users    625 Aug 11 19:26 config.h.in
-rw-r--r--  1 xxxxxx users  11523 Aug 11 19:29 config.log
-rwxr-xr-x  1 xxxxxx users  32424 Aug 11 19:29 config.status*
-rwxr-xr-x  1 xxxxxx users 133851 Aug 11 19:29 configure*
-rw-r--r--  1 xxxxxx users    479 Aug 11 19:26 configure.ac
-rw-r--r--  1 xxxxxx users  35147 Aug 11 19:26 COPYING
-rwxr-xr-x  1 xxxxxx users  23566 Aug 11 19:26 depcomp*
drwxr-xr-x  2 xxxxxx users   4096 Aug 11 19:26 .deps/
-rw-r--r--  1 xxxxxx users  15749 Aug 11 19:26 INSTALL
-rwxr-xr-x  1 xxxxxx users  13997 Aug 11 19:26 install-sh*
-rw-r--r--  1 xxxxxx users  27662 Aug 11 19:29 Makefile
-rw-r--r--  1 xxxxxx users    373 Aug 11 19:26 Makefile.am
-rw-r--r--  1 xxxxxx users  28016 Aug 11 19:29 Makefile.in
-rwxr-xr-x  1 xxxxxx users   6873 Aug 11 19:26 missing*
-rw-r--r--  1 xxxxxx users     17 Aug 11 19:26 NEWS
-rw-r--r--  1 xxxxxx users    291 Aug 11 19:25 Project.ede
-rw-r--r--  1 xxxxxx users      1 Aug 11 19:26 README
-rw-r--r--  1 xxxxxx users     30 Aug 11 19:29 stamp-h
-rw-r--r--  1 xxxxxx users     23 Aug 11 19:29 stamp-h1
-rwxr-xr-x  1 xxxxxx users  12887 Aug 11 19:26 tessi*
-rw-r--r--  1 xxxxxx users     27 Aug 11 19:26 test.cc
-rw-r--r--  1 xxxxxx users   2928 Aug 11 19:26 test.o

- The program can be run with C-c . R with no error.
- * Now I close emacs * !!

Step 2
------

- Start emacs
- Trying to load the project in 'khl' I get the error:

eieio-persistent-validate/fix-slot-value: Wrong type argument: arrayp, nil

- If I toggle the debugger: M-x toggle-debug-on-error RET
  and try to load the project in 'khl' I get

Debugger entered--Lisp error: (wrong-type-argument arrayp nil)
  child-of-class-p(ede-proj-target-makefile-program ede-target)
  eieio-persistent-validate/fix-slot-value(ede-proj-project :targets
(list (ede-proj-target-makefile-program "tessi" :name "tessi" :path ""
:source (quote ("test.cc")))))
  eieio-persistent-convert-list-to-object((ede-proj-project "mmm" :file
"Project.ede" :name "mmm" :targets (list
(ede-proj-target-makefile-program "tessi" :name "tessi" :path "" :source
(quote ("test.cc")))) :makefile-type (quote Makefile\.am)))
  eieio-persistent-read("/home/xxxxxx/projects/khl/Project.ede"
ede-proj-project)
  ede-proj-load("/home/xxxxxx/projects/khl/")
  #[(this dir) "\303#\304\"\204##\305	!\204##\306\307!\210\303#\310\"
!\211#\204 #\306\311!\210\312\n!)\207" [this dir o eieio-oref :safe-p
ede-directory-safe-p error "Attempt to load an unsafe project (bug
elsewhere in EDE)" load-type "Project type error: :load-type failed to
create a project" ede-add-project-to-global-list] 4 "Load in the project
associated with THIS project autoload description.\nTHIS project
description should be valid for DIR, where the project will\nbe
loaded."]([object ede-project-autoload "edeproject-makefile" "Make"
ede/proj "Project.ede" "" unbound nil ede-proj-load ede-proj-project nil
t nil] "/home/xxxxxx/projects/khl/")
  apply(#[(this dir) "\303#\304\"\204##\305
!\204##\306\307!\210\303#\310\"	!\211#\204 #\306\311!\210\312\n!)\207"
[this dir o eieio-oref :safe-p ede-directory-safe-p error "Attempt to
load an unsafe project (bug elsewhere in EDE)" load-type "Project type
error: :load-type failed to create a project"
ede-add-project-to-global-list] 4 "Load in the project associated with
THIS project autoload description.\nTHIS project description should be
valid for DIR, where the project will\nbe loaded."] ([object
ede-project-autoload "edeproject-makefile" "Make" ede/proj "Project.ede"
"" unbound nil ede-proj-load ede-proj-project nil t nil]
"/home/xxxxxx/projects/khl/"))
  ede-auto-load-project([object ede-project-autoload
"edeproject-makefile" "Make" ede/proj "Project.ede" "" unbound nil
ede-proj-load ede-proj-project nil t nil] "/home/xxxxxx/projects/khl/")
  ede-load-project-file("/home/xxxxxx/projects/khl")
  ede("/home/xxxxxx/projects/khl")
  call-interactively(ede nil nil)

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