GNU bug report logs - #36521
26.2; CEDET/Semantic - Semantic constantly entering debugger with scheme

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: David Palma <dbpalma9 <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 26.2; CEDET/Semantic - Semantic constantly entering debugger with
 scheme
Date: Sat, 6 Jul 2019 12:45:20 +0100

Semantic enters the debugger whenever it's parsing invalid scheme code with
matching parentheses. The error code is "A Rule must return a single
tag-line list!"

To trigger this simply write
(define )

with electric matching pair mode active, the ending parenthesis is
automatically put and semantic constantly tries to enter the debugger,
making it unusable.
This has already been reported here
https://sourceforge.net/p/cedet/mailman/message/36185774/


In GNU Emacs 26.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.8)
of 2019-04-12 built on juergen
Windowing system distributor 'The X.Org Foundation', version 11.0.12005000
Recent messages:
Checking 176 files in /usr/share/emacs/26.2/lisp/emacs-lisp...
Checking 24 files in /usr/share/emacs/26.2/lisp/cedet...
Checking 57 files in /usr/share/emacs/26.2/lisp/calendar...
Checking 87 files in /usr/share/emacs/26.2/lisp/calc...
Checking 105 files in /usr/share/emacs/26.2/lisp/obsolete...
Checking for load-path shadows...done
Quit
scroll-down-command: Beginning of buffer [2 times]
Turning on magit-auto-revert-mode...done
completing-read-default: Command attempted to use minibuffer while in 
minibuffer [2 times]
command-execute: Buffer is read-only: #<buffer tag.el.gz>
Configured using:
'configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
--localstatedir=/var --with-x-toolkit=gtk3 --with-xft --with-modules
'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong
-fno-plt' CPPFLAGS=-D_FORTIFY_SOURCE=2
LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS GLIB
NOTIFY ACL GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS LIBSYSTEMD LCMS2

Important settings:
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: @im=fcitx
locale-coding-system: utf-8-unix

Major mode: Emacs-Lisp

Minor modes in effect:
global-magit-file-mode: t
magit-auto-revert-mode: t
global-git-commit-mode: t
electric-pair-mode: t
yas-global-mode: t
yas-minor-mode: t
diff-auto-refine-mode: t
pyvenv-mode: t
shell-dirtrack-mode: t
ws-butler-mode: t
clean-aindent-mode: t
recentf-mode: t
global-semantic-idle-scheduler-mode: t
semantic-idle-scheduler-mode: t
global-semanticdb-minor-mode: t
semantic-mode: t
helm-mode: t
async-bytecomp-package-mode: t
helm-autoresize-mode: t
company-quickhelp-mode: t
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global-company-mode: t
company-mode: t
show-paren-mode: t
global-display-line-numbers-mode: t
display-line-numbers-mode: t
tooltip-mode: t
global-eldoc-mode: t
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
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
buffer-read-only: t
column-number-mode: t
line-number-mode: t
transient-mark-mode: t

Load-path shadows:
/home/hnasiet/.emacs.d/elpa/cmake-mode-20180709.1426/cmake-mode hides 
/usr/share/emacs/site-lisp/cmake-mode

Features:
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mail-utils jka-compr cl-print debug semantic/edit semantic/bovine/scm
semantic/decorate/include semantic/bovine/scm-by scheme
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term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
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button faces cus-face macroexp files text-properties overlay sha1 md5
base64 format env code-pages mule custom widget hashtable-print-readable
backquote threads dbusbind inotify lcms2 dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty make-network-process emacs)

Memory information:
((conses 16 731052 100135)
(symbols 48 54428 9)
(miscs 40 2441 894)
(strings 32 180031 12479)
(string-bytes 1 5155155)
(vectors 16 92322)
(vector-slots 8 1489339 113970)
(floats 8 362 695)
(intervals 56 6937 807)
(buffers 992 50))

Message #8 received at 36521 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: David Palma <dbpalma9 <at> gmail.com>
Cc: 36521 <at> debbugs.gnu.org
Subject: Re: bug#36521: 26.2;
 CEDET/Semantic - Semantic constantly entering debugger with scheme
Date: Mon, 08 Jul 2019 22:08:36 +0200

David Palma <dbpalma9 <at> gmail.com> writes:

> Semantic enters the debugger whenever it's parsing invalid scheme code with
> matching parentheses. The error code is "A Rule must return a single
> tag-line list!"
>
> To trigger this simply write
> (define )
>
> with electric matching pair mode active, the ending parenthesis is
> automatically put and semantic constantly tries to enter the debugger,
> making it unusable.

Do you have a recipe for how to reproduce this bug, starting with
"emacs -Q"?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

Message #11 received at 36521 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: David Palma <dbpalma9 <at> gmail.com>
Cc: 36521 <at> debbugs.gnu.org
Subject: Re: bug#36521: 26.2;
 CEDET/Semantic - Semantic constantly entering debugger with scheme
Date: Tue, 09 Jul 2019 00:03:15 +0200

David Palma <dbpalma9 <at> gmail.com> writes:

> I do, I have attached a scheme source example file.
>
> 1. Start emacs with "emacs -Q".
>
> 2. Enable semantic-mode with M-x semantic-mode
>
> 3. Open bugtest.scm
>
> And emacs should enter the debugger when semantic-idle-scheduler
> starts working.

Thanks; I'm able to reproduce the error in Emacs 27, too, and I get the
following backtrace:

Debugger entered: ((118 126))
  semantic--tag-expand((118 126))
  semantic-repeat-parse-whole-stream(((semantic-list 1 . 116) (semantic-list 118 . 126)) nil nil)
  semantic-parse-region-default(1 127 nil nil nil)
  semantic-parse-region(1 127)
  semantic-fetch-tags()
  semantic-idle-scheduler-refresh-tags()
  semantic-idle-core-handler()
  semantic-idle-scheduler-function()
  apply(semantic-idle-scheduler-function nil)
  timer-event-handler([t 0 1 0 t semantic-idle-scheduler-function nil idle 0])

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

Message #16 received at 36521 <at> debbugs.gnu.org (full text, mbox):

From: David Palma <dbpalma9 <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 36521 <at> debbugs.gnu.org
Subject: Re: bug#36521: 26.2; CEDET/Semantic - Semantic constantly entering
 debugger with scheme
Date: Mon, 8 Jul 2019 22:50:15 +0100

[Message part 1 (text/plain, inline)]

I do, I have attached a scheme source example file.

1. Start emacs with "emacs -Q".

2. Enable semantic-mode with M-x semantic-mode

3. Open bugtest.scm

And emacs should enter the debugger when semantic-idle-scheduler starts 
working.

Thanks,
David


On 7/8/19 9:08 PM, Lars Ingebrigtsen wrote:
> David Palma <dbpalma9 <at> gmail.com> writes:
>
>> Semantic enters the debugger whenever it's parsing invalid scheme code with
>> matching parentheses. The error code is "A Rule must return a single
>> tag-line list!"
>>
>> To trigger this simply write
>> (define )
>>
>> with electric matching pair mode active, the ending parenthesis is
>> automatically put and semantic constantly tries to enter the debugger,
>> making it unusable.
> Do you have a recipe for how to reproduce this bug, starting with
> "emacs -Q"?
>

[bugtest.scm (text/x-scheme, attachment)]

Message #19 received at 36521 <at> debbugs.gnu.org (full text, mbox):

From: David Palma <dbpalma9 <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 36521 <at> debbugs.gnu.org
Subject: Re: bug#36521: 26.2; CEDET/Semantic - Semantic constantly entering
 debugger with scheme
Date: Sat, 13 Jul 2019 21:24:18 +0100

A CEDET developer replied and attached a patch:

https://sourceforge.net/p/cedet/mailman/cedet-semantic/?viewmonth=201907

Regards,

David

On 7/8/19 11:03 PM, Lars Ingebrigtsen wrote:
> David Palma <dbpalma9 <at> gmail.com> writes:
>
>> I do, I have attached a scheme source example file.
>>
>> 1. Start emacs with "emacs -Q".
>>
>> 2. Enable semantic-mode with M-x semantic-mode
>>
>> 3. Open bugtest.scm
>>
>> And emacs should enter the debugger when semantic-idle-scheduler
>> starts working.
> Thanks; I'm able to reproduce the error in Emacs 27, too, and I get the
> following backtrace:
>
> Debugger entered: ((118 126))
>    semantic--tag-expand((118 126))
>    semantic-repeat-parse-whole-stream(((semantic-list 1 . 116) (semantic-list 118 . 126)) nil nil)
>    semantic-parse-region-default(1 127 nil nil nil)
>    semantic-parse-region(1 127)
>    semantic-fetch-tags()
>    semantic-idle-scheduler-refresh-tags()
>    semantic-idle-core-handler()
>    semantic-idle-scheduler-function()
>    apply(semantic-idle-scheduler-function nil)
>    timer-event-handler([t 0 1 0 t semantic-idle-scheduler-function nil idle 0])
>

Message #22 received at 36521 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: David Palma <dbpalma9 <at> gmail.com>
Cc: 36521 <at> debbugs.gnu.org
Subject: Re: bug#36521: 26.2; CEDET/Semantic - Semantic constantly entering
 debugger with scheme
Date: Sun, 14 Jul 2019 13:51:43 +0200

David Palma <dbpalma9 <at> gmail.com> writes:

> A CEDET developer replied and attached a patch:
>
> https://sourceforge.net/p/cedet/mailman/cedet-semantic/?viewmonth=201907

Thanks; I've now applied the patch to the Emacs trunk.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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