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bug#23651: 25.1.50; edebug-read-sexp: infinite recursion when reading ba
From: |
ju . schmidt |
Subject: |
bug#23651: 25.1.50; edebug-read-sexp: infinite recursion when reading backquote or comma |
Date: |
Sun, 29 May 2016 20:09:41 +0200 |
Start emacs with -Q, do M-: and type "(require 'edebug)". Then write
this in buffer "*scratch*":
`1
Then do M-: and type "(edebug-eval-defun)". It will give this error:
"edebug-read-sexp: Lisp nesting exceeds `max-lisp-eval-depth'"
(The documentation for edebug-eval-defun says that this should display
"1" instead of giving an error).
One gets the same error when the buffer contains this instead:
,1
This is caused by an endless recursion in edebug-read-sexp which
apparently can be fixed like this:
diff --git a/lisp/emacs-lisp/edebug.el b/lisp/emacs-lisp/edebug.el
index c283c16..4254862 100644
--- a/lisp/emacs-lisp/edebug.el
+++ b/lisp/emacs-lisp/edebug.el
@@ -722,9 +722,9 @@ edebug-read-sexp
((eq class 'string) (read (current-buffer)))
((eq class 'quote) (forward-char 1)
(list 'quote (edebug-read-sexp)))
- ((eq class 'backquote)
+ ((eq class 'backquote) (forward-char 1)
(list '\` (edebug-read-sexp)))
- ((eq class 'comma)
+ ((eq class 'comma) (forward-char 1)
(list '\, (edebug-read-sexp)))
(t ; anything else, just read it.
(read (current-buffer))))))
Configured using:
'configure --prefix=/home/jhs/local --with-xpm=no --with-gif=no
--with-tiff=no PKG_CONFIG_PATH=/home/jhs/local/lib/pkgconfig'
Configured features:
JPEG PNG SOUND DBUS GSETTINGS NOTIFY LIBXML2 FREETYPE XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11
Important settings:
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
Major mode: Lisp Interaction
Minor modes in effect:
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t
Load-path shadows:
None found.
Features:
(shadow sort map mail-extr emacsbug message puny seq byte-opt gv
bytecomp byte-compile cl-extra help-mode cconv cl-loaddefs pcase cl-lib
dired dired-loaddefs format-spec rfc822 mml easymenu mml-sec
password-cache epa derived epg epg-config gnus-util rmail rmail-loaddefs
mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils
mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr
mail-utils term/xterm xterm time-date mule-util tooltip eldoc electric
uniquify ediff-hook vc-hooks lisp-float-type mwheel term/x-win x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list newcomment elisp-mode lisp-mode prog-mode register page
menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core term/tty-colors frame cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese charscript case-table epa-hook
jka-cmpr-hook help simple abbrev obarray minibuffer cl-preloaded nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote dbusbind inotify dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty make-network-process emacs)
Memory information:
((conses 16 98461 8207)
(symbols 48 20696 0)
(miscs 40 33 93)
(strings 32 17428 3931)
(string-bytes 1 532970)
(vectors 16 11481)
(vector-slots 8 395373 4073)
(floats 8 185 220)
(intervals 56 207 0)
(buffers 976 11)
(heap 1024 33354 1491))
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