GNU bug report logs - #1077
23.0.60; x-create-frame: (wrong-type-argument number-or-marker-p nil)

Previous Next

Full log

Message #144 received at 1077 <at> debbugs.gnu.org (full text, mbox):

From: martin rudalics <rudalics <at> gmx.at>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 1077 <at> debbugs.gnu.org, drew.adams <at> oracle.com
Subject: Re: bug#1077: 23.0.60;
	x-create-frame: (wrong-type-argument number-or-marker-p nil)
Date: Tue, 30 Nov 2010 18:05:03 +0100

>> The only difference I can think of is that nil stands for "this frame
>> cannot have a menubar" and zero for "the menubar has been temporarily
>> disabled".
>
> What is the difference between these two?  What does "cannot have a
> menu bar" mean in practice?  Just wondering.

Minibuffer-only frames don't have a menubar by design.  Surprisingly
they have (menu-bar-lines . 1) here.

>> But if not entry for `menu-bar-lines' exists, calling
>> (frame-parameter ... 'menu-bar-lines) returns nil.
>
> That's not guaranteed to be true.

For the menu-bar-lines parameter it is true AFAICT.

> You will see in the implementation
> of frame-parameter and frame-parameters that we return values for some
> frame parameters without ever looking at the frame's parameter alist.
> It's true that frame-parameter actually does look in frame's parameter
> alist when the value of menu-bar-lines is requested, but
> frame-parameters does not, at least for TTYs.

Do you mean where it goes for the menu_bar_lines entry from the frame
structure via FRAME_MENU_BAR_LINES?  I suppose this is the only part of
the menu-bar handling code that is still correct.

> That said, I agree that any code which is called during frame creation
> should be able to avoid signaling an error.

I still don't get it why a condition_case can't handle such an error.

>> Probably for using `menu-bar-lines' in a uniform manner instead of a
>> combination of `menu-bar-mode' and `menu-bar-lines'.
>
> If so, this is a thing of the past, as we no longer need
> menu-bar-mode, menu-bar-lines alone is enough, right?

Currently, menu-bar alone is enough ;-)

> Even funnier, the ELisp manual shows an example of building a menu bar
> with two lines, see the node "Menu Bar" there.

It used to work with Emacs' own menubars IIRC.

martin

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.