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bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode
From: |
Ken Raeburn |
Subject: |
bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode |
Date: |
Fri, 11 Mar 2016 14:18:55 -0500 |
> On Mar 11, 2016, at 09:31, Eli Zaretskii <eliz@gnu.org> wrote:
>
>> From: Ken Raeburn <raeburn@raeburn.org>
>> Date: Fri, 11 Mar 2016 06:17:45 -0500
>> Cc: 22975@debbugs.gnu.org
>>
>> It appears that Emacs tries to display the “Using load-path …” message,
>> calls echo_area_display, display_echo_area, with_echo_area_buffer,
>> display_echo_area_1, resize_mini_window, and grow_mini_window, which then
>> uses
>> call3 (Qwindow_resize_root_window_vertically, …)
>> but since we haven’t loaded window.el yet, there’s no function definition
>> and we raise a signal, quitting out of loadup and trying to display a
>> message.
>
> I'm not sure I follow: message calls message3_nolog, which should have
> done this:
>
> void
> message3_nolog (Lisp_Object m)
> {
> struct frame *sf = SELECTED_FRAME ();
>
> if (FRAME_INITIAL_P (sf))
> message_to_stderr (m);
>
> Is FRAME_INITIAL_P not doing it job in this case?
With “-nw”, sf->output_method is output_termcap. It’s cleared the window and
drawn a line of dashes near the bottom, and messages are displayed on the
bottom line (when it’s not crashing).
Without “-nw”, sf->output_method is output_initial and messages are printed to
stderr line by line until the X frame opens.
> And just so I'm on the right page here: the "Loading foo..." messages
> that loadup.el displays are shown where in this case? written to
> stderr or displayed in the echo area?
In the echo area.
>
>> As to why normal temacs doesn’t show the problem: The load path displayed
>> for a normal temacs contains one directory, but for a CANNOT_DUMP emacs it
>> contains several; in my tests, resize_mini_window computed the height needed
>> as one line for the former and six lines for the latter, so only in the
>> latter case did grow_mini_window need to get called.
>
> I think temacs should write these messages to stderr, so the whole
> resize_mini_window rigmarole shouldn't get called at all. What am I
> missing?
In init_display we call init_tty and then update the frame’s output_method.
Under X11, the X frame creation happens much later.
>
>> If I mess around with installation prefix length, window size, and font
>> size, I can get the CANNOT_DUMP emacs to start properly (but with unreadably
>> tiny characters); and if I make my terminal window quite narrow, I can get a
>> normal temacs to get into some kind of error loop (not the same failure mode
>> but probably a similar root cause). So it’s not just the CANNOT_DUMP setting
>> that’s causing the problem.
>
> Error loop that displays what messages?
*Tries* to display… From the stack trace, it looks like it’s throwing an error
that window—-resize-root-window-vertically isn’t defined, then back at the top
level we notice we’re displaying a message, so we call
resize_echo_area_exactly, which decides to resize, which tries to call
window—resize-root-window-vertically, etc.
Ken
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Ken Raeburn, 2016/03/10
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Eli Zaretskii, 2016/03/10
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Eli Zaretskii, 2016/03/10
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Ken Raeburn, 2016/03/11
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Eli Zaretskii, 2016/03/11
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode,
Ken Raeburn <=
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Eli Zaretskii, 2016/03/11
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Kenneth Raeburn, 2016/03/11
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Andreas Schwab, 2016/03/11
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Eli Zaretskii, 2016/03/11
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Eli Zaretskii, 2016/03/12
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Ken Raeburn, 2016/03/12
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, martin rudalics, 2016/03/13
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Eli Zaretskii, 2016/03/13
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, martin rudalics, 2016/03/13
- bug#22975: 25.0.92; CANNOT_DUMP build can't start in tty mode, Eli Zaretskii, 2016/03/13