Recent Emacs crashes when started in console

Recent Emacs crashes when started in console

[Ari Roponen]

Hi,

recent Emacs crashes when started in GNU/Linux console:

Program received signal SIGSEGV, Segmentation fault.
set_tty_color_mode (tty=0x8b7f1d8, f=0x8392c98) at term.c:2175
2175      tem = assq_no_quit (Qtty_color_mode, XFRAME (val)->param_alist);
(gdb) list
2170      int mode;
2171      extern Lisp_Object Qtty_color_mode;
2172      Lisp_Object tty_color_mode_alist
2173        = Fintern_soft (build_string ("tty-color-mode-alist"), Qnil);
2174    
2175      tem = assq_no_quit (Qtty_color_mode, XFRAME (val)->param_alist);
2176      val = CONSP (tem) ? XCDR (tem) : Qnil;
2177    
2178      if (INTEGERP (val))
2179        color_mode = val;
(gdb) quit


This patch seems to fix the problem:


diff --git a/src/term.c b/src/term.c
index f76d0a5..4e63568 100644
--- a/src/term.c
+++ b/src/term.c
@@ -2172,7 +2172,7 @@ set_tty_color_mode (tty, f)
   Lisp_Object tty_color_mode_alist
     = Fintern_soft (build_string ("tty-color-mode-alist"), Qnil);
 
-  tem = assq_no_quit (Qtty_color_mode, XFRAME (val)->param_alist);
+  tem = assq_no_quit (Qtty_color_mode, f->param_alist);
   val = CONSP (tem) ? XCDR (tem) : Qnil;
 
   if (INTEGERP (val))


-- 
Ari Roponen

Problems with Emacs (Cygwin)

[Angelo Graziosi]

The Cygwin build of Emacs-CVS-23.0.60 (a few hours ago) fails when 
started as

$ emacs -nw
Fatal error (11)Segmentation fault

Instead, it works if started as

$ emacs &

With CVS of less than 24 hours ago all works fine.


Could the cause be [1]?



Cheers,
    Angelo.
---
[1]
[...]
2008-04-09  Stefan Monnier  <...>
[...]

	* xdisp.c (redisplay_internal): Reset tty's color_mode when switching
	to another frame.
	* frame.c (do_switch_frame): Refine the top_frame/async_visible code.
	Don't call set_tty_color_mode.
	(store_frame_param): Reset previous_frame rather than call
	set_tty_color_mode.
	* term.c (set_tty_color_mode): Rewrite.
	* dispextern.h (set_tty_color_mode): New type.
	* termchar.h (struct tty_display_info): Add `previous_color_mode'.
[...]
---------------------------

Re: Problems with Emacs (Cygwin)

[Stefan Monnier]

> The Cygwin build of Emacs-CVS-23.0.60 (a few hours ago) fails when started
> $ emacs -nw
> Fatal error (11)Segmentation fault

> Instead, it works if started as

> $ emacs &

> With CVS of less than 24 hours ago all works fine.

> Could the cause be [1]?

Could be.  But we need more info to figure it out.
E.g. a backtrace?


        Stefan

Re: Recent Emacs crashes when started in console

[Angelo Graziosi]

Ari Roponen wrote:

 > recent Emacs crashes when started in GNU/Linux console:

 > Program received signal SIGSEGV, Segmentation fault.
 > set_tty_color_mode (tty=0x8b7f1d8, f=0x8392c98) at term.c:2175
 > 2175      tem = assq_no_quit (Qtty_color_mode, XFRAME
 > (val)->param_alist);

This is exactly the same problem (seen on Cygwin) I flagged here [1,2].

The patch proposed

 > diff --git a/src/term.c b/src/term.c
 > [...]

solves the things also on Cygwin (though I was constrained to use 
CVS-trunk of about 36 hours ago: the current fails bootstrapping, as 
several posts, on this list, confirm).

Thanks,
    Angelo

---
[1] http://lists.gnu.org/archive/html/emacs-devel/2008-04/msg00727.html
[2] http://lists.gnu.org/archive/html/emacs-devel/2008-04/msg00764.html