[racket-dev] crash with subprocess

Thanks. If you don't need places, compiling with places disabled (i.e.,
`configure --disable-places') would likely work around the bug for now.

At Thu, 30 Aug 2012 16:18:15 +0200, Tobias Hammer wrote:
> It uses only a single place. The system is 32bit Linux:
> Linux 2.6.32.59-0.7-pae #1 SMP 2012-07-13 15:50:56 +0200 i686 i686 i386  
> GNU/Linux
> 
> Tobias
> 
> 
> On Thu, 30 Aug 2012 15:17:05 +0200, Matthew Flatt <mflatt at cs.utah.edu>  
> wrote:
> 
> > It looks like we still have problems with the `subprocess'
> > implementation that cooperates with places.
> >
> > Does your program use multiple places, or just one? If it uses multiple
> > places, does it use `subprocess' in multiple places?
> >
> > Is your platform 32-bit Linux?
> >
> > At Thu, 30 Aug 2012 13:38:23 +0200, Tobias Hammer wrote:
> >> Hi,
> >>
> >> i am experiencing random crashes when using subprocess followed by a
> >> subprocess-wait. My test program, that i call via subprocess is special,
> >> in that it kills itself very fast with a sigkill after executing.
> >>
> >> Unfortunately, i wasn't able to reproduce this behavior in a small  
> >> sample
> >> but i could record three different core dumps with full debug info
> >> (attached).
> >> I tested with my own build of git head and 5.3.0.21.
> >>
> >> All crashes/freezes are preceded by the message
> >> "unexpected error from waitpid(138321448[1]): 10"
> >> with a completely invalid pid argument to waitpid. The errno 10
> >> is "No child processes".
> >>
> >> What follows this message are random freezes (ctrl+c has no effect),
> >> heap corruptions or segfaults.
> >>
> >> I hope the supplied information is enough to locate whatever goes wrong,
> >> otherwise i can, of course send in more.
> >>
> >> Tobias
> >
> 
> 
> -- 
> ---------------------------------------------------------
> Tobias Hammer
> DLR / Institute of Robotics and Mechatronics
> Muenchner Str. 20, D-82234 Wessling
> Tel.: 08153/28-1487
> Mail: tobias.hammer at dlr.de