Found where it crashes!

[Hans Deragon]

Hi guys.


  Well it looks like db is off the hook.  Thanks to Eric Sorenson and is ¨file¨ 
tip, I got the full trace:


---->
Edit action: AutoCreate
Edit action: BeginGroupIfNoLineMatching
---Type <return> to continue, or q <return> to quit---

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1076587584 (LWP 15291)]
0x0805fbfc in LocateItemMatchingRegExp (list=0x0,
    string=0xbfff8eb0 "ssh-dss.*root.kickstart") at item-ext.c:394
394     Debug("LocateItemMatchingRexExp(%s,%s)\n",list->name,string);
(gdb) backtrace
#0  0x0805fbfc in LocateItemMatchingRegExp (list=0x0,
    string=0xbfff8eb0 "ssh-dss.*root.kickstart") at item-ext.c:394
#1  0x080691dc in DoEditFile (ptr=0x81408c0,
    filename=0x8140910 "/root/.ssh/authorized_keys2") at edittools.c:927
#2  0x08068212 in WrapDoEditFile (ptr=0x81408c0,
    filename=0x8140910 "/root/.ssh/authorized_keys2") at edittools.c:329
#3  0x08053300 in EditFiles () at do.c:2145
---Type <return> to continue, or q <return> to quit---
#4  0x0804d1ea in DoTree (passes=2, info=0x808f40f "Main Tree")
    at cfagent.c:1239
#5  0x0804af21 in main (argc=4, argv=0xbfffe0f4) at cfagent.c:188
#6  0x420156a4 in __libc_start_main () from /lib/tls/libc.so.6
(gdb) print string
$1 = 0xbfff8eb0 "ssh-dss.*root.kickstart"
(gdb) print list->name
Cannot access memory at address 0x4
(gdb) print list
$2 = (struct Item *) 0x0
<----

  ... list is null.  The worst thing is that cfagent only crashes when -d2 is 
on!  list is only referenced in the Debug() statement.  I tried without -d2 and 
cfagent runs fine.

  I am not sure if this is possible, but can we wrap the Debug macro around an 
exception catcher, catch any error, print a serious error message with meaning 
info and abort?  In Java I could suggest, but not in C.

  Now why list is null, I do not know.  I have not investigated further.


Best regards,
Hans Deragon
--
Consultant en informatique/Software Consultant
Deragon Informatique inc.         Open source:
http://www.deragon.biz            http://swtmvcwrapper.sourceforge.net
mailto://hans@deragon.biz         http://autopoweroff.sourceforge.net