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Re: attempt to kill non-existant buffer leads to error

From: Juri Linkov
Subject: Re: attempt to kill non-existant buffer leads to error
Date: Sun, 09 Oct 2005 09:16:05 +0300
User-agent: Gnus/5.110004 (No Gnus v0.4) Emacs/22.0.50 (gnu/linux)

>    BTW, shouldn't `-D' command line option enable the debugger globally?
>    It seems natural for `-D' ("debug") option to set debug-on-error to t.
> No.  You have the wrong sense of what the option stands for.
> Think of `-D' as standing for "display".
>   (emacs)Misc X says
>     `-D'
>     `--basic-display'
>          Disable the menu-bar, the tool-bar, the scroll-bars, and tool
>          tips, and turn off the blinking cursor.  This can be useful
>          for making a test case that simplifies debugging of display
>          problems.

Since the purpose of this option is to be useful for debugging, it is
not unreasonable to let it set debug-on-error to t.

> Incidentally (I just tried it), you also go to an error buffer when
> you attempt to kill non-existant buffer when you start Emacs as
>     /usr/local/src/emacs/src/emacs -Q
> which leaves you with the icon-containing tool bar.

Some evaluation commands activate the debugger regardless of the
default value of `debug-on-error'.

Juri Linkov

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