From: Keith David Bershatsky <esq@lawlist.com>
To: Noam Postavsky <npostavs@users.sourceforge.net>,
Paul Eggert <eggert@cs.ucla.edu>
Cc: 27779@debbugs.gnu.org
Subject: bug#27779: #27779; C stack overflow from `read' on deeply nested lisp object.
Date: Mon, 08 Jan 2018 17:38:27 -0800 [thread overview]
Message-ID: <m2y3l7ke0c.wl%esq@lawlist.com> (raw)
In-Reply-To: <m2wp72h72g.wl%esq@lawlist.com>
[-- Attachment #1: Type: text/plain, Size: 1077 bytes --]
Dear Paul and Noam:
I have determined that bug #27779 was introduced on December 8, 2016 with commit f0a1e9ec3fba3d5bea5bd62f525dba3fb005d1b1. The following patch to the Emacs 26 branch as of today (01/08/2018) reverses the commit and enables the test below to be completed successfully.
[FYI: I am on OSX 10.6.8 and am manually increasing the stack limit with `ulimit -S -s unlimited` so that I can have rather large custom undo-tree histories.]
(require 'cl-lib)
(defun make-deep-object (depth)
(let ((obj 1))
(while (> (cl-decf depth) 0)
(setq obj (vector (list obj))))
obj))
;;; STACK OVERFLOW: problem with `read'
;;; The bug was introduced on December 8, 2016 with
;;; commit: f0a1e9ec3fba3d5bea5bd62f525dba3fb005d1b1
(let* ((print-circle t)
(max-lisp-eval-depth most-positive-fixnum)
(max-specpdl-size most-positive-fixnum)
(deep-object (make-deep-object 6000))
(string (prin1-to-string deep-object))
(result (read string)))
(when result
(message "Bug #27779: Success! (%d)" (length string))))
[-- Attachment #2: patch.diff --]
[-- Type: application/diff, Size: 9713 bytes --]
next prev parent reply other threads:[~2018-01-09 1:38 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-21 2:12 bug#27779: 26.0.50: read -- Re-entering top level after C stack overflow Keith David Bershatsky
2017-07-21 3:03 ` Keith David Bershatsky
2017-07-22 3:24 ` npostavs
2017-07-22 5:52 ` Keith David Bershatsky
2017-07-22 12:05 ` npostavs
2017-07-22 16:32 ` Keith David Bershatsky
2017-07-22 17:23 ` npostavs
2017-07-22 21:31 ` Keith David Bershatsky
2017-07-23 2:45 ` npostavs
2017-07-23 22:28 ` Keith David Bershatsky
2018-01-09 1:38 ` Keith David Bershatsky [this message]
2018-06-06 21:04 ` bug#27779: #27779; C stack overflow from `read' on deeply nested lisp object Vasilij Schneidermann
2018-06-06 21:30 ` Noam Postavsky
2018-06-07 8:18 ` Vasilij Schneidermann
2019-05-02 2:30 ` Noam Postavsky
2019-05-02 7:05 ` Keith David Bershatsky
2019-05-02 7:26 ` Paul Eggert
2019-05-02 8:00 ` Keith David Bershatsky
2022-04-21 13:33 ` bug#27779: 26.0.50: read -- Re-entering top level after C stack overflow Lars Ingebrigtsen
2022-04-21 18:56 ` Keith David Bershatsky
2022-04-22 0:26 ` Paul Eggert
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