bug#26824: 24.5; Bytecode overflow error when byte compiling large .el file

bug#26824: 24.5; Bytecode overflow error when byte compiling large .el file

[Christian Wittern]

--text follows this line--

I installed the package "mandoku" from melpa.  The latest version
includes a file "mandoku-cbeta.el".  When installing the package, this
file should be compiled, but the overflow error prevents this.



In GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9)
  of 2016-04-18 on lgw01-04, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11804000
System Description:    Ubuntu 16.04.2 LTS

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 -fstack-protector-strong -Wformat
  -Werror=format-security -Wall' 'CPPFLAGS=-Wdate-time
  -D_FORTIFY_SOURCE=2' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro''

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

Major mode: Compilation

Minor modes in effect:
   diff-auto-refine-mode: t
   magit-auto-revert-mode: t
   global-git-commit-mode: t
   async-bytecomp-package-mode: t
   shell-dirtrack-mode: t
   override-global-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
   blink-cursor-mode: t
   auto-composition-mode: t
   auto-encryption-mode: t
   auto-compression-mode: t
   buffer-read-only: t
   line-number-mode: t
   transient-mark-mode: t

Recent messages:
Generating autoloads for helm-types.el...done
Generating autoloads for helm-utils.el...done
Saving file 
/home/chris/sinomacs/.emacs.d/elpa/helm-20170506.840/helm-autoloads.el...
Wrote /home/chris/sinomacs/.emacs.d/elpa/helm-20170506.840/helm-autoloads.el
(No changes need to be saved)
Loading async...done
Turning on magit-auto-revert-mode...done
For information about GNU Emacs and the GNU system, type C-h C-a.
M-o <down> is undefined
Making completion list...

Load-path shadows:
/home/chris/sinomacs/.emacs.d/elpa/mandoku-20170325.1917/mandoku-remote 
hides /Users/chris/projects/mandoku/lisp/mandoku-remote
/home/chris/sinomacs/.emacs.d/elpa/mandoku-20170325.1917/mandoku-init 
hides /Users/chris/projects/mandoku/lisp/mandoku-init
/home/chris/sinomacs/.emacs.d/elpa/mandoku-20170325.1917/mandoku-cbeta 
hides /Users/chris/projects/mandoku/lisp/mandoku-cbeta
/home/chris/sinomacs/.emacs.d/elpa/mandoku-20170325.1917/mandoku-github 
hides /Users/chris/projects/mandoku/lisp/mandoku-github
/home/chris/sinomacs/.emacs.d/elpa/mandoku-20170325.1917/mandoku-dict 
hides /Users/chris/projects/mandoku/lisp/mandoku-dict
/home/chris/sinomacs/.emacs.d/elpa/mandoku-20170325.1917/w32-registry 
hides /Users/chris/projects/mandoku/lisp/w32-registry
/home/chris/sinomacs/.emacs.d/elpa/mandoku-20170325.1917/mandoku hides 
/Users/chris/projects/mandoku/lisp/mandoku
/home/chris/sinomacs/.emacs.d/elpa/mandoku-20170325.1917/mandoku-images 
hides /Users/chris/projects/mandoku/lisp/mandoku-images
/home/chris/sinomacs/.emacs.d/elpa/mandoku-20170325.1917/mandoku-annot 
hides /Users/chris/projects/mandoku/lisp/mandoku-annot
/home/chris/sinomacs/.emacs.d/elpa/mandoku-20170325.1917/mandoku-link 
hides /Users/chris/projects/mandoku/lisp/mandoku-link
/usr/share/emacs/24.5/site-lisp/debian-startup hides 
/usr/share/emacs/site-lisp/debian-startup
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-compat hides 
/usr/share/emacs/24.5/lisp/org/org-compat
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-crypt hides 
/usr/share/emacs/24.5/lisp/org/org-crypt
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ox-md hides 
/usr/share/emacs/24.5/lisp/org/ox-md
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org hides 
/usr/share/emacs/24.5/lisp/org/org
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-src hides 
/usr/share/emacs/24.5/lisp/org/org-src
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-comint hides 
/usr/share/emacs/24.5/lisp/org/ob-comint
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-awk hides 
/usr/share/emacs/24.5/lisp/org/ob-awk
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-lob hides 
/usr/share/emacs/24.5/lisp/org/ob-lob
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-mobile hides 
/usr/share/emacs/24.5/lisp/org/org-mobile
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-js hides 
/usr/share/emacs/24.5/lisp/org/ob-js
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-plantuml hides 
/usr/share/emacs/24.5/lisp/org/ob-plantuml
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ox-man hides 
/usr/share/emacs/24.5/lisp/org/ox-man
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-python hides 
/usr/share/emacs/24.5/lisp/org/ob-python
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-lisp hides 
/usr/share/emacs/24.5/lisp/org/ob-lisp
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-bibtex hides 
/usr/share/emacs/24.5/lisp/org/org-bibtex
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-tangle hides 
/usr/share/emacs/24.5/lisp/org/ob-tangle
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ox-publish hides 
/usr/share/emacs/24.5/lisp/org/ox-publish
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-bbdb hides 
/usr/share/emacs/24.5/lisp/org/org-bbdb
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-picolisp hides 
/usr/share/emacs/24.5/lisp/org/ob-picolisp
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-faces hides 
/usr/share/emacs/24.5/lisp/org/org-faces
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-habit hides 
/usr/share/emacs/24.5/lisp/org/org-habit
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-capture hides 
/usr/share/emacs/24.5/lisp/org/org-capture
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-install hides 
/usr/share/emacs/24.5/lisp/org/org-install
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-eval hides 
/usr/share/emacs/24.5/lisp/org/ob-eval
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-scala hides 
/usr/share/emacs/24.5/lisp/org/ob-scala
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-keys hides 
/usr/share/emacs/24.5/lisp/org/ob-keys
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-mouse hides 
/usr/share/emacs/24.5/lisp/org/org-mouse
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-sass hides 
/usr/share/emacs/24.5/lisp/org/ob-sass
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-macro hides 
/usr/share/emacs/24.5/lisp/org/org-macro
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-screen hides 
/usr/share/emacs/24.5/lisp/org/ob-screen
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-emacs-lisp hides 
/usr/share/emacs/24.5/lisp/org/ob-emacs-lisp
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-footnote hides 
/usr/share/emacs/24.5/lisp/org/org-footnote
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-ruby hides 
/usr/share/emacs/24.5/lisp/org/ob-ruby
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ox-texinfo hides 
/usr/share/emacs/24.5/lisp/org/ox-texinfo
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ox-org hides 
/usr/share/emacs/24.5/lisp/org/ox-org
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-gnuplot hides 
/usr/share/emacs/24.5/lisp/org/ob-gnuplot
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-java hides 
/usr/share/emacs/24.5/lisp/org/ob-java
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-haskell hides 
/usr/share/emacs/24.5/lisp/org/ob-haskell
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-feed hides 
/usr/share/emacs/24.5/lisp/org/org-feed
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-archive hides 
/usr/share/emacs/24.5/lisp/org/org-archive
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-scheme hides 
/usr/share/emacs/24.5/lisp/org/ob-scheme
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-datetree hides 
/usr/share/emacs/24.5/lisp/org/org-datetree
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-ctags hides 
/usr/share/emacs/24.5/lisp/org/org-ctags
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-inlinetask hides 
/usr/share/emacs/24.5/lisp/org/org-inlinetask
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-org hides 
/usr/share/emacs/24.5/lisp/org/ob-org
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob hides 
/usr/share/emacs/24.5/lisp/org/ob
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-maxima hides 
/usr/share/emacs/24.5/lisp/org/ob-maxima
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-R hides 
/usr/share/emacs/24.5/lisp/org/ob-R
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-shen hides 
/usr/share/emacs/24.5/lisp/org/ob-shen
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-lilypond hides 
/usr/share/emacs/24.5/lisp/org/ob-lilypond
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-perl hides 
/usr/share/emacs/24.5/lisp/org/ob-perl
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-makefile hides 
/usr/share/emacs/24.5/lisp/org/ob-makefile
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-docview hides 
/usr/share/emacs/24.5/lisp/org/org-docview
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-dot hides 
/usr/share/emacs/24.5/lisp/org/ob-dot
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-octave hides 
/usr/share/emacs/24.5/lisp/org/ob-octave
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-mhe hides 
/usr/share/emacs/24.5/lisp/org/org-mhe
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-ref hides 
/usr/share/emacs/24.5/lisp/org/ob-ref
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-css hides 
/usr/share/emacs/24.5/lisp/org/ob-css
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-table hides 
/usr/share/emacs/24.5/lisp/org/org-table
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-pcomplete hides 
/usr/share/emacs/24.5/lisp/org/org-pcomplete
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-sqlite hides 
/usr/share/emacs/24.5/lisp/org/ob-sqlite
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-io hides 
/usr/share/emacs/24.5/lisp/org/ob-io
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-version hides 
/usr/share/emacs/24.5/lisp/org/org-version
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-table hides 
/usr/share/emacs/24.5/lisp/org/ob-table
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-C hides 
/usr/share/emacs/24.5/lisp/org/ob-C
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-element hides 
/usr/share/emacs/24.5/lisp/org/org-element
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-id hides 
/usr/share/emacs/24.5/lisp/org/org-id
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-mscgen hides 
/usr/share/emacs/24.5/lisp/org/ob-mscgen
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ox-icalendar hides 
/usr/share/emacs/24.5/lisp/org/ox-icalendar
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-gnus hides 
/usr/share/emacs/24.5/lisp/org/org-gnus
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-protocol hides 
/usr/share/emacs/24.5/lisp/org/org-protocol
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ox-html hides 
/usr/share/emacs/24.5/lisp/org/ox-html
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-calc hides 
/usr/share/emacs/24.5/lisp/org/ob-calc
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-ditaa hides 
/usr/share/emacs/24.5/lisp/org/ob-ditaa
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-ledger hides 
/usr/share/emacs/24.5/lisp/org/ob-ledger
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-matlab hides 
/usr/share/emacs/24.5/lisp/org/ob-matlab
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-rmail hides 
/usr/share/emacs/24.5/lisp/org/org-rmail
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-w3m hides 
/usr/share/emacs/24.5/lisp/org/org-w3m
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-info hides 
/usr/share/emacs/24.5/lisp/org/org-info
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-irc hides 
/usr/share/emacs/24.5/lisp/org/org-irc
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-loaddefs hides 
/usr/share/emacs/24.5/lisp/org/org-loaddefs
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-exp hides 
/usr/share/emacs/24.5/lisp/org/ob-exp
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-latex hides 
/usr/share/emacs/24.5/lisp/org/ob-latex
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-macs hides 
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/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-fortran hides 
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/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-asymptote hides 
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/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ob-core hides 
/usr/share/emacs/24.5/lisp/org/ob-core
/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-plot hides 
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/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-list hides 
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/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-agenda hides 
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/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-timer hides 
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/home/chris/sinomacs/.emacs.d/elpa/org-20170502/ox hides 
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/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-entities hides 
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/home/chris/sinomacs/.emacs.d/elpa/org-20170502/org-indent hides 
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Features:
(shadow sort mail-extr emacsbug mandoku-tls mandoku-annot mandoku-dict
helm helm-source helm-multi-match helm-lib guide-key popwin face-remap
gh mandoku hi-lock git mandoku-github github-clone mandoku-link subr-x
mandoku-remote org-clock org-table org-agenda nnir gnus-sum nnoo
gnus-group gnus-undo nnmail mail-source gnus-start gnus-spec gnus-int
gnus-range gnus-win gnus gnus-ems nnheader avl-tree doc-view jka-compr
image-mode bibtex ob-octave ebnf2ps ps-print ps-def lpr calc-store
calc-trail calc-ext calc calc-loaddefs calc-macs cc-mode cc-fonts
cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs
magit-obsolete magit-blame magit-stash magit-bisect magit-remote
magit-commit magit-sequence magit-notes magit-worktree magit-branch
magit-files magit-refs magit-status magit magit-repos magit-apply
magit-wip magit-log magit-diff smerge-mode diff-mode magit-core
magit-autorevert autorevert filenotify magit-process magit-margin
magit-mode help-mode magit-git magit-section magit-popup git-commit
magit-utils crm gh-gist gh-users gh-pulls gh-issues gh-repos gh-comments
gh-oauth gh-api logito gh-cache pcache gh-auth gh-url gh-common
gh-profile rx marshal eieio-base ht json recentf tree-widget wid-edit
with-editor async-bytecomp log-edit pcvs-util add-log term disp-table
ehelp esh-var esh-io esh-cmd esh-opt esh-ext esh-proc esh-arg eldoc
esh-groups eshell esh-module esh-mode esh-util tramp-sh tramp
tramp-compat tramp-loaddefs trampver shell server derived info smtpmail
sendmail dired-aux dired async f dash s warnings edmacro kmacro org
org-macro org-footnote org-pcomplete pcomplete org-list org-faces
org-entities noutline outline org-version ob-emacs-lisp ob ob-tangle
ob-ref ob-lob ob-table ob-exp org-src ob-keys ob-comint ob-core ob-eval
org-compat org-macs org-loaddefs find-func cal-menu calendar
cal-loaddefs hydra advice lv tar-mode use-package pcase diminish
bind-key easy-mmode cl-macs cl gv compile comint ansi-color ring
autoload lisp-mnt mm-archive message format-spec rfc822 mml easymenu
mml-sec mailabbrev gmm-utils mailheader mm-decode mm-bodies mm-encode
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rfc2047 rfc2045 ietf-drums url-gw url-cache url-auth url url-proxy
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bug#26824: 24.5; Bytecode overflow error when byte compiling large .el file

[Glenn Morris]

Christian Wittern wrote:

> I installed the package "mandoku" from melpa.  The latest version
> includes a file "mandoku-cbeta.el".  When installing the package, this
> file should be compiled, but the overflow error prevents this.

I see that file basically contains a 16000 line nested cond, with one
branch per line, and has now been marked no-byte-compile (by you, I'm
guessing from the name?).

https://github.com/mandoku/mandoku/commit/0e733fdaea77150539455656c2e6af08d19611b0

bug#26824: 24.5; Bytecode overflow error when byte compiling large .el file

[Christian Wittern]

On 05/09/2017 01:40 AM, Glenn Morris wrote:
> Christian Wittern wrote:
>
>> I installed the package "mandoku" from melpa.  The latest version
>> includes a file "mandoku-cbeta.el".  When installing the package, this
>> file should be compiled, but the overflow error prevents this.
> I see that file basically contains a 16000 line nested cond, with one
> branch per line, and has now been marked no-byte-compile (by you, I'm
> guessing from the name?).
>
> https://github.com/mandoku/mandoku/commit/0e733fdaea77150539455656c2e6af08d19611b0
>
Yes, that is right.  This file is a bit of a crazy thing, if there is a 
better way to achieve this, I would be glad to know.  And I did mark it 
as no-byte-compile, but it seems that this has no effect, since when 
installed as a package the installer still attempts to byte compile it.
All the best,
Christian

bug#26824: 24.5; Bytecode overflow error when byte compiling large .el file

[Glenn Morris]

[Please reply-to-all]

Christian Wittern wrote:

> Yes, that is right.  This file is a bit of a crazy thing, if there is
> a better way to achieve this, I would be glad to know.  And I did mark
> it as no-byte-compile, but it seems that this has no effect, since
> when installed as a package the installer still attempts to byte
> compile it.

Probably because the no-byte-compile is in the second line, not the first.

bug#26824: 24.5; Bytecode overflow error when byte compiling large .el file

[Michael Heerdegen]

Christian Wittern <cwittern@gmail.com> writes:

> Yes, that is right.  This file is a bit of a crazy thing, if there is
> a better way to achieve this, I would be glad to know.

Use a data structure.

In the simplest case (when lookup time is not critical), just use a
linear structure, an alist: For each VOL, define an alist with elements
(pagelimit . filename) with `defconst'.  To implement
`mandoku-cbeta-vol-page-to-file', find the first entry whose car is not
smaller than the given page in a loop.  Return the cdr of the found
cons.


Michael.

bug#26824: 24.5; Bytecode overflow error when byte compiling large .el file

[Christian Wittern]

On 05/16/2017 09:24 AM, Michael Heerdegen wrote:
> Christian Wittern <cwittern@gmail.com> writes:
>
>> Yes, that is right.  This file is a bit of a crazy thing, if there is
>> a better way to achieve this, I would be glad to know.
> Use a data structure.
>
> In the simplest case (when lookup time is not critical), just use a
> linear structure, an alist: For each VOL, define an alist with elements
> (pagelimit . filename) with `defconst'.  To implement
> `mandoku-cbeta-vol-page-to-file', find the first entry whose car is not
> smaller than the given page in a loop.  Return the cdr of the found
> cons.
Well, yes.  But I expect the timing then to be slower (although I did 
not really test this), because I would have to go sequentially through 
the alist, so I went with this inelegant method, which at least 
responses fast, even without bytecompiling.

Christian

bug#26824: 24.5; Bytecode overflow error when byte compiling large .el file

[npostavs]

Christian Wittern <cwittern@gmail.com> writes:

> Well, yes.  But I expect the timing then to be slower (although I did
> not really test this), because I would have to go sequentially through
> the alist, so I went with this inelegant method, which at least
> responses fast, even without bytecompiling.

You just need to make nested alists, as in

    '(("T" . ((1 . ((0011102 . "KR6a0001_001.txt")
                    (0011102 . "KR6a0001_001.txt")
                    (0016212 . "KR6a0001_002.txt")
                    (0016212 . "KR6a0001_002.txt")
                    (0023303 . "KR6a0001_003.txt")
                    (0023303 . "KR6a0001_003.txt")
                    (0030206 . "KR6a0001_004.txt"))))))

The `cond' form tests each case in sequence, so it should be about the
same speed as an cl-assoc-if lookup.

bug#26824: 24.5; Bytecode overflow error when byte compiling large .el file

[npostavs]

I see the code triggering this has a FIXME on it:

      ;; FIXME: Replace this by some workaround.
      (if (> (car bytes-tail) 255) (error "Bytecode overflow"))

What workarounds could we use?  Introduce a new jump opcode with a 4
byte operand?  Or daisy chain a bunch of relative jumps?  Both of these
seem a bit extreme for a pretty rare edge case.