Re: seg fault in DDD

[Andreas Zeller]

Hi!

Nils@InfoSun.FMI.Uni-Passau.De (Nils Ellmenreich) writes:

> While debugging mozilla, a segfault in mozilla occurs. I get a back trace
> by typing 'where' in the gdb sub window. Now I want the DDD back trace
> window Status->backtrace. It opens up. As soon as I click on a
> function/method within the back trace window, DDD reports an internal
> error and wants to restart itself. Doing so twice then segfaults DDD.
> 
> DDD log attached.
> 
> The bug ist reproducible.

This looks like a memory corruption problem in the LessTif XmText
widget (similar problems have been reported before).

I'm not a big expert in LessTif internals, but at least I want to make
sure this is really the cause.  There's two ways for narrowing that
problem down:

* Set the environment variable MALLOC_CHECK_ to 2 and repeat the DDD run;
  while this will not help fixing the error, any memory corruption problems
  will be detected sooner, facilitating localization.

* You may wish to upgrade to LessTif 0.92 or later, available from
  `www.lesstif.org'; please tell me whether the problem persists.

Best wishes,

Andreas

-- 
Andreas Zeller     Universitaet Passau
                   http://www.fmi.uni-passau.de/st/staff/zeller/