bug#5792: 23.1; man.el{,c} fails to load when utf-8 mode enabled

bug#5792: 23.1; man.el{,c} fails to load when utf-8 mode enabled

[Randal L. Schwartz]

In my .emacs, I have:

  (set-terminal-coding-system 'utf-8)
  (set-keyboard-coding-system 'utf-8)

When I invoke M-x man, I get an invalid byte when trying to load
either the man.el or the man.elc.

Workaround is to (load "man") before turning on utf-8 mode.


In GNU Emacs 23.1.1 (amd64-portbld-freebsd8.0)
 of 2010-03-28 on red.stonehenge.com
configured using `configure  '--with-x=no' '--prefix=/usr/local' '--mandir=/usr/local/man' '--infodir=/usr/local/info/' '--build=amd64-portbld-freebsd8.0' 'build_alias=amd64-portbld-freebsd8.0' 'CC=cc' 'CFLAGS=-O2 -pipe -fno-strict-aliasing''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: IRC

Minor modes in effect:
  auto-fill-function: do-auto-fill
  shell-dirtrack-mode: t
  display-time-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
o C-v C-n C-n C-n C-f C-f C-f C-x o C-h t q C-x k RET 
y C-x RET k RET q C-x RET k TAB a s c i TAB i q ESC 
x s e t - v e r RET q ESC x s e t - v a r RET d e b 
u g - o n - e r r o r RET n i l RET ESC x s e t C-g 
C-x 4 b RET ESC < C-n C-n C-f C-f C-f C-f C-f C-f C-f 
C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f C-f 
C-x C-e q C-x C-b C-x o C-a C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n d d d d x C-n d d d 
d x C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p d x 
C-p C-p C-p C-p C-n C-n f C-x h ESC x e v a l - b u 
f RET C-x k RET ESC x m a n RET C-g d x C-p v o k SPC 
- SPC s o l v e SPC DEL d SPC m y SPC f a c e SPC p 
r o b l e m SPC a n d SPC m y SPC M - X SPC m a DEL 
DEL DEL DEL x SPC m a n SPC p r o b l e DEL DEL l e 
m SPC a s DEL DEL h a s SPC a SPC w o r k a r o u d 
n RET C-p DEL C-p C-p C-p C-p C-p C-p C-p ESC x m a 
DEL x DEL DEL r e p o r TAB e m TAB RET

Recent messages:
Entering debugger...
Back to top level.
Entering debugger...
Back to top level.
Quit
Mark set
Loading man...
Entering debugger...
Back to top level.
Mark set [2 times]
Quit

bug#5792: 23.1; man.el{,c} fails to load when utf-8 mode enabled

[Chong Yidong]

> In my .emacs, I have:
>
>   (set-terminal-coding-system 'utf-8)
>   (set-keyboard-coding-system 'utf-8)
>
> When I invoke M-x man, I get an invalid byte when trying to load
> either the man.el or the man.elc.

Thanks for the bug report, but it's took vague for me to reproduce; for
instance, what do you mean by "get an invalid byte"?  Could you provide
a testcase starting from `emacs -Q'?

bug#5792: 23.1; man.el{,c} fails to load when utf-8 mode enabled

[Randal L. Schwartz]

>>>>> "Chong" == Chong Yidong <cyd@stupidchicken.com> writes:

>> In my .emacs, I have:
>> 
>> (set-terminal-coding-system 'utf-8)
>> (set-keyboard-coding-system 'utf-8)
>> 
>> When I invoke M-x man, I get an invalid byte when trying to load
>> either the man.el or the man.elc.

Chong> Thanks for the bug report, but it's took vague for me to reproduce; for
Chong> instance, what do you mean by "get an invalid byte"?  Could you provide
Chong> a testcase starting from `emacs -Q'?

I imagine it'd be something like

emacs -Q

M-: (set-terminal-coding-system 'utf-8) RET
M-: (set-keyboard-coding-system 'utf-8) RET
M-: (load-library "man) RET

which will blow up while trying to read the "man" library.  There's
something both the man.el and man.elc versions that is *not* utf-8
encoded, probably just latin1.

-- 
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
<merlyn@stonehenge.com> <URL:http://www.stonehenge.com/merlyn/>
Smalltalk/Perl/Unix consulting, Technical writing, Comedy, etc. etc.
See http://methodsandmessages.vox.com/ for Smalltalk and Seaside discussion

bug#5792: 23.1; man.el{,c} fails to load when utf-8 mode enabled

[Chong Yidong]

merlyn@stonehenge.com (Randal L. Schwartz) writes:

> Chong> Thanks for the bug report, but it's took vague for me to reproduce; for
> Chong> instance, what do you mean by "get an invalid byte"?  Could you provide
> Chong> a testcase starting from `emacs -Q'?
>
> I imagine it'd be something like
>
> emacs -Q
>
> M-: (set-terminal-coding-system 'utf-8) RET
> M-: (set-keyboard-coding-system 'utf-8) RET
> M-: (load-library "man") RET
>
> which will blow up while trying to read the "man" library.

I don't see any error; man is loaded fine.

bug#5792: 23.1; man.el{,c} fails to load when utf-8 mode enabled

[Randal L. Schwartz]

>>>>> "Chong" == Chong Yidong <cyd@stupidchicken.com> writes:

Chong> merlyn@stonehenge.com (Randal L. Schwartz) writes:
Chong> Thanks for the bug report, but it's took vague for me to reproduce; for
Chong> instance, what do you mean by "get an invalid byte"?  Could you provide
Chong> a testcase starting from `emacs -Q'?
>> 
>> I imagine it'd be something like
>> 
>> emacs -Q
>> 
>> M-: (set-terminal-coding-system 'utf-8) RET
>> M-: (set-keyboard-coding-system 'utf-8) RET
>> M-: (load-library "man") RET
>> 
>> which will blow up while trying to read the "man" library.

Chong> I don't see any error; man is loaded fine.

Yup, same here.  So it's something more complex than this.

All I know is that in my .emacs, if I had this:

(set-terminal-coding-system 'utf-8)
(set-keyboard-coding-system 'utf-8)
(load-library "man")

it'd blow up.

But if I instead moved the load first:

(load-library "man")
(set-terminal-coding-system 'utf-8)
(set-keyboard-coding-system 'utf-8)

it worked ok.

I don't know how to simulate that from emacs -Q.

-- 
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
<merlyn@stonehenge.com> <URL:http://www.stonehenge.com/merlyn/>
Smalltalk/Perl/Unix consulting, Technical writing, Comedy, etc. etc.
See http://methodsandmessages.vox.com/ for Smalltalk and Seaside discussion

bug#5792: 23.1; man.el{,c} fails to load when utf-8 mode enabled

[Eli Zaretskii]

> From: merlyn@stonehenge.com (Randal L. Schwartz)
> Date: Tue, 06 Apr 2010 10:04:55 -0700
> Cc: 5792@debbugs.gnu.org
> 
> All I know is that in my .emacs, if I had this:
> 
> (set-terminal-coding-system 'utf-8)
> (set-keyboard-coding-system 'utf-8)
> (load-library "man")
> 
> it'd blow up.

I don't see how setting terminal and keyboard encoding could affect
loading a Lisp file.  These settings are relevant only to keyboard
input and terminal output.

Could you perhaps bisect your .emacs to find out what else is needed
to reproduce this problem?

bug#5792: 23.1; man.el{,c} fails to load when utf-8 mode enabled

[Randal L. Schwartz]

>>>>> "Eli" == Eli Zaretskii <eliz@gnu.org> writes:

Eli> Could you perhaps bisect your .emacs to find out what else is needed
Eli> to reproduce this problem?

Got it.  It was an old man.elc in my private .elib compiled before
utf8 probably even existed. :)

Sorry for the misinform.  Thanks.

-- 
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
<merlyn@stonehenge.com> <URL:http://www.stonehenge.com/merlyn/>
Smalltalk/Perl/Unix consulting, Technical writing, Comedy, etc. etc.
See http://methodsandmessages.vox.com/ for Smalltalk and Seaside discussion