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From: Alan Mackenzie <acm@muc.de>
To: emacs-devel@gnu.org
Subject: [acm@muc.de: Re: Inadequate documentation of silly characters on screen.]
Date: Wed, 18 Nov 2009 19:12:58 +0000	[thread overview]
Message-ID: <20091118191258.GA2676@muc.de> (raw)

Hi, Emacs!

This is the message I meant to CC: to emacs-devel.  It looks serious.

----- Forwarded message from Alan Mackenzie <acm@muc.de> -----

Date: Wed, 18 Nov 2009 11:04:53 +0000
From: Alan Mackenzie <acm@muc.de>
To: Miles Bader <miles@gnu.org>
Subject: Re: Inadequate documentation of silly characters on screen.

Hi, again, Miles!

On Wed, Nov 18, 2009 at 06:40:53PM +0900, Miles Bader wrote:
> Alan Mackenzie <acm@muc.de> writes:
> > Once again, I'm getting silly characters on the screen.  In *scratch*,
> > where's I've written "ñ", what gets displayed is "\361".  It may have
> > happened when I upgraded to Emacs 23.

> Does it happen with "emacs -Q"?

> How do you "write" ñ (do you use an input method?  Type it on your keyboard...?)?

Of the good and the bad representations, if I do "C-x =" on each, I get
this:

Char: ñ (241, #o361, #xf1, file #xF1)
Char: \361 (4194289, #o17777761, #x3ffff1, raw-byte)

This sequence reproduces the bug:
M-: (setq nl "\n")
M-: (aset nl 0 ?ñ
M-: (insert nl)

So it looks a bit like the `aset' invocation is doing damage, by doing
sign extension rather than zero filling.

> Do you use X emacs, emacs in a tty, etc.?  If tty emacs, which type of
> terminal do you use?

Linux tty.

> -Miles

-- 
Alan Mackenzie (Nuremberg, Germany).


----- End forwarded message -----




             reply	other threads:[~2009-11-18 19:12 UTC|newest]

Thread overview: 96+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-11-18 19:12 Alan Mackenzie [this message]
2009-11-19  1:27 ` Fwd: Re: Inadequate documentation of silly characters on screen Stefan Monnier
2009-11-19  8:20   ` Alan Mackenzie
2009-11-19  8:50     ` Miles Bader
2009-11-19 10:16     ` Fwd: " Andreas Schwab
2009-11-19 12:21       ` Alan Mackenzie
2009-11-19 13:21       ` Jason Rumney
2009-11-19 13:35         ` Stefan Monnier
2009-11-19 14:18         ` Alan Mackenzie
2009-11-19 14:58           ` Jason Rumney
2009-11-19 15:42             ` Alan Mackenzie
2009-11-19 19:39               ` Eli Zaretskii
2009-11-19 15:30           ` Stefan Monnier
2009-11-19 15:58             ` Alan Mackenzie
2009-11-19 16:06               ` Andreas Schwab
2009-11-19 16:47               ` Aidan Kehoe
2009-11-19 17:29                 ` Alan Mackenzie
2009-11-19 18:21                   ` Aidan Kehoe
2009-11-20  2:43                   ` Stephen J. Turnbull
2009-11-19 19:45                 ` Eli Zaretskii
2009-11-19 20:07                   ` Eli Zaretskii
2009-11-19 19:55                 ` Stefan Monnier
2009-11-20  3:13                   ` Stephen J. Turnbull
2009-11-19 16:55               ` David Kastrup
2009-11-19 18:08                 ` Alan Mackenzie
2009-11-19 19:25                   ` Davis Herring
2009-11-19 21:25                     ` Alan Mackenzie
2009-11-19 22:31                       ` David Kastrup
2009-11-21 22:52                         ` Richard Stallman
2009-11-23  2:08                           ` Displaying bytes (was: Inadequate documentation of silly characters on screen.) Stefan Monnier
2009-11-23 20:38                             ` Richard Stallman
2009-11-23 21:34                               ` Per Starbäck
2009-11-24 22:47                                 ` Richard Stallman
2009-11-25  1:33                                   ` Kenichi Handa
2009-11-25  2:29                                     ` Displaying bytes (was: Inadequate documentation of silly Stefan Monnier
2009-11-25  2:50                                       ` Lennart Borgman
2009-11-25  6:25                                       ` Stephen J. Turnbull
2009-11-25  5:40                                     ` Displaying bytes (was: Inadequate documentation of silly characters on screen.) Ulrich Mueller
2009-11-26 22:59                                       ` Displaying bytes Reiner Steib
2009-11-27  0:16                                         ` Ulrich Mueller
2009-11-27  1:41                                         ` Stefan Monnier
2009-11-27  4:14                                         ` Stephen J. Turnbull
2009-11-25  5:59                                     ` Displaying bytes (was: Inadequate documentation of silly characters on screen.) Stephen J. Turnbull
2009-11-25  8:16                                       ` Kenichi Handa
2009-11-29 16:01                                     ` Richard Stallman
2009-11-29 16:31                                       ` Displaying bytes (was: Inadequate documentation of silly Stefan Monnier
2009-11-29 22:01                                         ` Juri Linkov
2009-11-30  6:05                                           ` tomas
2009-11-30 12:09                                             ` Andreas Schwab
2009-11-30 12:39                                               ` tomas
2009-11-29 22:19                                       ` Displaying bytes (was: Inadequate documentation of silly characters on screen.) Kim F. Storm
2009-11-30  1:42                                         ` Stephen J. Turnbull
2009-11-24  1:28                               ` Displaying bytes Stefan Monnier
2009-11-24 22:47                                 ` Richard Stallman
2009-11-25  2:18                                   ` Stefan Monnier
2009-11-26  6:24                                     ` Richard Stallman
2009-11-26  8:59                                       ` David Kastrup
2009-11-26 14:57                                       ` Stefan Monnier
2009-11-26 16:28                                         ` Lennart Borgman
2009-11-27  6:36                                         ` Richard Stallman
2009-11-24 22:47                                 ` Richard Stallman
2009-11-20  8:48                       ` Fwd: Re: Inadequate documentation of silly characters on screen Eli Zaretskii
2009-11-19 19:52                   ` Eli Zaretskii
2009-11-19 20:53                     ` Alan Mackenzie
2009-11-19 22:16                       ` David Kastrup
2009-11-20  8:55                         ` Eli Zaretskii
2009-11-19 20:05                   ` Stefan Monnier
2009-11-19 21:27                     ` Alan Mackenzie
2009-11-19 19:43               ` Eli Zaretskii
2009-11-19 21:57                 ` Alan Mackenzie
2009-11-19 23:10                   ` Stefan Monnier
2009-11-19 20:02               ` Stefan Monnier
2009-11-19 14:08     ` Stefan Monnier
2009-11-19 14:50       ` Jason Rumney
2009-11-19 15:27         ` Stefan Monnier
2009-11-19 23:12           ` Miles Bader
2009-11-20  2:16             ` Stefan Monnier
2009-11-20  3:37             ` Stephen J. Turnbull
2009-11-20  4:30               ` Stefan Monnier
2009-11-20  7:18                 ` Stephen J. Turnbull
2009-11-20 14:16                   ` Stefan Monnier
2009-11-21  4:13                     ` Stephen J. Turnbull
2009-11-21  5:24                       ` Stefan Monnier
2009-11-21  6:42                         ` Stephen J. Turnbull
2009-11-21  6:49                           ` Stefan Monnier
2009-11-21  7:27                             ` Stephen J. Turnbull
2009-11-23  1:58                               ` Stefan Monnier
2009-11-21 12:33                           ` David Kastrup
2009-11-21 13:55                             ` Stephen J. Turnbull
2009-11-21 14:36                               ` David Kastrup
2009-11-21 17:53                                 ` Stephen J. Turnbull
2009-11-21 23:30                                   ` David Kastrup
2009-11-22  1:27                                     ` Sebastian Rose
2009-11-22  8:06                                       ` David Kastrup
2009-11-22 23:52                                         ` Sebastian Rose
2009-11-19 17:08       ` Fwd: " Alan Mackenzie

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