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bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object.
From: |
Noam Postavsky |
Subject: |
bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object. |
Date: |
Sat, 18 Nov 2017 22:17:40 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.0.90 (gnu/linux) |
Eric Abrahamsen <eric@ericabrahamsen.net> writes:
> (defclass person ()
> ((name :type string :initarg :name)))
>
> (defclass classy (eieio-persistent)
> ((teacher
> :type person
> :initarg :teacher)
> (students
> :initarg :students :initform (make-hash-table))))
>
> (setq jane (make-instance 'person :name "Jane"))
> (setq bob (make-instance 'person :name "Bob"))
>
> (setq class (make-instance 'classy
> :teacher jane))
> (puthash "Bob" bob (slot-value class 'students))
> Jane is `read'-able, Bob isn't. `object-write' will recurse and use
> `object-write' on any member objects, but the hashtable gets sent to
> `prin1', which I assume uses `prin1' on all its values instead:
Yes, but this is the case in emacs-25 as well. The significant
difference seems to be in the class object:
25.3:
(eieio--object-class-tag bob) => eieio-class-tag--person
26:
(eieio--object-class-tag bob) => #2=#s(eieio--class person nil nil
[#s(cl-slot-descriptor name unbound string nil)] #s(hash-table size 65 test eq
rehash-size 1.5 rehash-threshold 0.8125 data (name 0)) nil ((:name . name))
#1=[] #1# #s(#2# unbound) (:custom-groups nil))
In Emacs 25 we have a simple symbol which will round-trip as an `eq'
object, in Emacs 26 we have a structure which will not (and furthermore
has some circularity, requiring print-circle to print readably).
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., (continued)
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Pierre Téchoueyres, 2017/11/10
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/12
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Pierre Téchoueyres, 2017/11/14
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/14
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Stefan Monnier, 2017/11/15
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Pierre Téchoueyres, 2017/11/17
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/17
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Eric Abrahamsen, 2017/11/17
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/18
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Eric Abrahamsen, 2017/11/18
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object.,
Noam Postavsky <=
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Eric Abrahamsen, 2017/11/19
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Pierre Téchoueyres, 2017/11/23
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/23
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Pierre Téchoueyres, 2017/11/28
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/28
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Pierre Téchoueyres, 2017/11/28
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Noam Postavsky, 2017/11/28
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Stefan Monnier, 2017/11/29
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Eric Abrahamsen, 2017/11/28
- bug#29220: 26.0.90; eieio-persistent-read fail to restore saved object., Stefan Monnier, 2017/11/29