GNU bug report logs - #28293
24.5; Haskell Mode Hangs on loading large complex file

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

From: Mike Dupont <jamesmikedupont <at> googlemail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.5; Haskell Mode Hangs on loading large complex file
Date: Wed, 30 Aug 2017 06:03:56 -0400

Load this large haskell file
it hangs emacs, I think it is something in the mode.

https://github.com/h4ck3rm1k3/gcc-ontology/blob/7889b822218950fcdc414a4e054d6e7bb4a3e52e/tests/test_haskell1_b.hs


In GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.21.5)
 of 2016-09-05 on trouble, modified by Debian
System Description: Debian GNU/Linux unstable (sid)

Configured using:
 `configure --build x86_64-linux-gnu --prefix=/usr
 --sharedstatedir=/var/lib --libexecdir=/usr/lib
 --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-pop=yes
 --enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.5/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.5/site-lisp:/usr/share/emacs/site-lisp
 --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib
 --libexecdir=/usr/lib --localstatedir=/var/lib
 --infodir=/usr/share/info --mandir=/usr/share/man --with-pop=yes
 --enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.5/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.5/site-lisp:/usr/share/emacs/site-lisp
 --with-x=yes --with-x-toolkit=gtk3 --with-toolkit-scroll-bars
 'CFLAGS=-g -O2
 -fdebug-prefix-map=/build/emacs24-24.5+1=. -fstack-protector-strong
 -Wformat -Werror=format-security -Wall' 'CPPFLAGS=-Wdate-time
 -D_FORTIFY_SOURCE=2' LDFLAGS=-Wl,-z,relro'

Important settings:
  value of $LC_ALL: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Haskell

Minor modes in effect:
  haskell-indentation-mode: t
  tooltip-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

Recent messages:
Loading /var/cache/dictionaries-common/emacsen-ispell-default.el (source)...done
Loading debian-ispell...done
Loading /var/cache/dictionaries-common/emacsen-ispell-dicts.el (source)...done
Loading /etc/emacs/site-start.d/50dictionaries-common.el (source)...done
Loading /etc/emacs/site-start.d/50python-docutils.el (source)...done
For information about GNU Emacs and the GNU system, type C-h C-a.
(New file)
Saving file /home/mdupont/experiments/gcc-ontology/tests/test.hs...
Wrote /home/mdupont/experiments/gcc-ontology/tests/test.hs
Making completion list...

Load-path shadows:
/usr/share/emacs/24.5/site-lisp/debian-startup hides
/usr/share/emacs/site-lisp/debian-startup
/usr/share/emacs24/site-lisp/cmake-data/cmake-mode hides
/usr/share/emacs/site-lisp/cmake-mode
/usr/share/emacs/site-lisp/rst hides /usr/share/emacs/24.5/lisp/textmodes/rst

Features:
(shadow sort mail-extr emacsbug message format-spec rfc822 mml mml-sec
mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils
mailheader sendmail rfc2047 rfc2045 ietf-drums mail-utils help-mode
haskell haskell-completions haskell-load haskell-commands
highlight-uses-mode haskell-modules haskell-sandbox
haskell-navigate-imports haskell-repl haskell-collapse hideshow
haskell-debug haskell-interactive-mode haskell-presentation-mode
haskell-compile haskell-process haskell-session url-util haskell-hoogle
vc-git haskell-mode haskell-cabal haskell-utils haskell-font-lock
haskell-indentation haskell-string haskell-sort-imports haskell-lexeme
haskell-align-imports haskell-compat haskell-complete-module
haskell-ghc-support noutline outline easy-mmode flymake etags compile
comint ring dabbrev ansi-color haskell-customize xterm gh-common
gh-profile url-parse auth-source gnus-util time-date mm-util mail-prsvr
password-cache url-vars rx s marshal ht json dash eieio byte-opt
bytecomp byte-compile cl-extra cl-loaddefs cl-lib cconv eieio-core
advice help-fns info easymenu package epg-config tooltip electric
uniquify ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar
dnd fontset image regexp-opt fringe tabulated-list newcomment lisp-mode
prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
mouse jit-lock font-lock syntax facemenu font-core frame cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev
minibuffer 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 make-network-process
dbusbind gfilenotify dynamic-setting system-font-setting
font-render-setting move-toolbar gtk x-toolkit x multi-tty emacs)

Memory information:
((conses 16 146806 6971)
 (symbols 48 25084 0)
 (miscs 40 75 131)
 (strings 32 33718 5931)
 (string-bytes 1 1113583)
 (vectors 16 15510)
 (vector-slots 8 444933 4851)
 (floats 8 80 365)
 (intervals 56 261 0)
 (buffers 960 14))


-- 
James Michael DuPont

Message #8 received at 28293 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Mike Dupont <jamesmikedupont <at> googlemail.com>
Cc: 28293 <at> debbugs.gnu.org
Subject: Re: bug#28293: 24.5; Haskell Mode Hangs on loading large complex file
Date: Wed, 30 Aug 2017 17:38:39 +0300

> From: Mike Dupont <jamesmikedupont <at> googlemail.com>
> Date: Wed, 30 Aug 2017 06:03:56 -0400
> 
> Load this large haskell file
> it hangs emacs, I think it is something in the mode.
> 
> https://github.com/h4ck3rm1k3/gcc-ontology/blob/7889b822218950fcdc414a4e054d6e7bb4a3e52e/tests/test_haskell1_b.hs

It doesn't hang here, neither with Emacs 24.5 nor with the current
master.  It displays the first screenful rather quickly, and then
works very sluggishly, even at the beginning of the buffer, much worse
at the end.  But the latter is a known issue: this file is a single
11MB line of text, and Emacs's display is very slow with such long
lines.

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

From: Andreas Röhler <andreas.roehler <at> easy-emacs.de>
To: bug-gnu-emacs <at> gnu.org
Subject: Re: bug#28293: 24.5; Haskell Mode Hangs on loading large complex file
Date: Wed, 30 Aug 2017 18:49:41 +0200

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

May confirm the bugfrom GNU Emacs 25.1.91.1 (i686-pc-linux-gnu, GTK+ 
Version 3.14.5)of 2017-01-02
With emacs -Q it opens quickly, but hangs when moving down.
Without -Q emacs freezes.

Assume the length of line is the reason, not the file resp. the mode.

BTW haskell-mode is developed at https://github.com/haskell



On 30.08.2017 16:38, Eli Zaretskii wrote:
>> From: Mike Dupont <jamesmikedupont <at> googlemail.com>
>> Date: Wed, 30 Aug 2017 06:03:56 -0400
>>
>> Load this large haskell file
>> it hangs emacs, I think it is something in the mode.
>>
>> https://github.com/h4ck3rm1k3/gcc-ontology/blob/7889b822218950fcdc414a4e054d6e7bb4a3e52e/tests/test_haskell1_b.hs
> It doesn't hang here, neither with Emacs 24.5 nor with the current
> master.  It displays the first screenful rather quickly, and then
> works very sluggishly, even at the beginning of the buffer, much worse
> at the end.  But the latter is a known issue: this file is a single
> 11MB line of text, and Emacs's display is very slow with such long
> lines.
>
>
>

[Message part 2 (text/html, inline)]

Message #14 received at 28293 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Mike Dupont <jamesmikedupont <at> googlemail.com>
Cc: 28293 <at> debbugs.gnu.org
Subject: Re: bug#28293: 24.5; Haskell Mode Hangs on loading large complex file
Date: Wed, 30 Aug 2017 12:39:30 -0400

Mike Dupont wrote:

> it hangs emacs, I think it is something in the mode.
[...]
> Major mode: Haskell

Haskell mode isn't part of GNU Emacs/ELPA, so please report this to
whoever maintains it, not here.

Message #17 received at 28293 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Mike Dupont <jamesmikedupont <at> googlemail.com>
Cc: 28293 <at> debbugs.gnu.org
Subject: Re: bug#28293: 24.5; Haskell Mode Hangs on loading large complex file
Date: Wed, 30 Aug 2017 12:44:19 -0400

Glenn Morris wrote:

> Haskell mode isn't part of GNU Emacs/ELPA, so please report this to
> whoever maintains it, not here.

PS unless it's the previously mentioned generic long lines issue.
Either way, I'll close this report, since we already have several about
long lines.

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