Re: Tmux crashes on attaching

[Thomas Adam]

On 12 November 2010 14:43, Jan Seeger jan.see...@thenybble.de wrote:
 Greetings!

 I am using tmux version 1.3.1, and the tmux server keeps on crashing
 during an attach. The relevant error line is fatal: tty_raw: write
 failed: Resource temporarily unavailable.

 I have a window manager shortcut set up to execute xterm -e 'tmux
 attach -d' to open a terminal when I press the shortcut. Very often,
 the attach fails, the xterm appears for a very short time, and then it
 disappears as tmux has crashed. What could be the problem?

 Regards,
 Jan Seeger

Presumably if you pass xterm the -hold option, you don't see
anything useful there?

-- Thomas Adam

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Re: Window updates stop until moved

[Nicholas Riley]

In article 4cde1a6b.4010...@cowan.name,
 Micah Cowan mi...@cowan.name wrote:

 Not true; should be fixed in current CVS HEAD. As a workaround, detach
 any other clients currently attached to the same session (use prefix D).

This does sound encouraging as I do often have multiple clients attached 
to a session.

However, I was running a few-day-old CVS HEAD and still had the problem. 
I just updated to the latest version, but now the server process dumps 
core when I start tmux.

The problem appears to be this change in compat/imsg.c:

Index: compat/imsg.c
===
RCS file: /cvsroot/tmux/tmux/compat/imsg.c,v
retrieving revision 1.5
retrieving revision 1.6
diff -r1.5 -r1.6
1c1
 /* $Id: imsg.c,v 1.5 2010/06/06 00:08:28 tcunha Exp $ */
---
 /* $Id: imsg.c,v 1.6 2010/11/11 20:41:08 nicm Exp $ */
114c114
  if ((imsg-data = malloc(datalen)) == NULL)
---
  if (datalen != 0  (imsg-data = malloc(datalen + 1)) == NULL)?

The logic here seems broken (if datalen is 0 then it won't return with 
an error).

However, even fixing this:

Index: compat/imsg.c
===
RCS file: /cvsroot/tmux/tmux/compat/imsg.c,v
retrieving revision 1.6
diff -r1.6 imsg.c
114c114,116
  if (datalen != 0  (imsg-data = malloc(datalen + 1)) == NULL)
---
  if (datalen == 0)
 return (-1);
  if ((imsg-data = malloc(datalen + 1)) == NULL)

tmux now returns -1 all the way up the stack and exits.

datalen is 1024 consistently for a while, then it gets big, then it's 0.

[...]
Breakpoint 1, imsg_get (ibuf=0x80b2858, imsg=0xbfa40264) at 
compat/imsg.c:114
114  if (datalen == 0)
$36 = 1024
(gdb) 
Continuing.

Breakpoint 1, imsg_get (ibuf=0x80b2858, imsg=0xbfa40264) at 
compat/imsg.c:114
114  if (datalen == 0)
$37 = 4228
(gdb) 
Continuing.

Breakpoint 1, imsg_get (ibuf=0x80b2858, imsg=0xbfa40264) at 
compat/imsg.c:114
114  if (datalen == 0)
$38 = 0

Sorry I don't have time to debug this any further...
-- 
Nicholas Riley njri...@illinois.edu


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