Re: [wxhaskell-users] Sigsev on Process example

[Benedikt G. <Ben...@we...>]

Hello Daan, Hello List,

I have some free time this weekend which I want to use to track down
this sigsev bug.  Interestingly the bug does not appear that often 
when running the Process.hs in a debugger.  But most of the time it
does crash when I try to execute the unknown cmd `cmd' to times in a
row.  I compiled process using ghc -debug -package wx --make Process.hs
gdb says:

Starting program: /home/dreamer/programming/wxhaskell/wxhaskell-0.8/samples/wx/a.out 
[Thread debugging using libthread_db enabled]
[New Thread 1090297408 (LWP 1826)]
Detaching after fork from child process 1829.
[New Thread 1100573616 (LWP 1830)]
[New Thread 1108962224 (LWP 1831)]
[Thread 1108962224 (zombie) exited]
[Thread 1100573616 (zombie) exited]
Detaching after fork from child process 1832.
[New Thread 1100573616 (LWP 1833)]
[New Thread 1108962224 (LWP 1834)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1108962224 (LWP 1834)]
0x40221dd4 in wxInputSinkEvent::Read () from /usr/local/lib/libwxc-gtk2.4.2-0.8.so
(gdb) bt
#0  0x40221dd4 in wxInputSinkEvent::Read () from /usr/local/lib/libwxc-gtk2.4.2-0.8.so
#1  0x402219c9 in wxInputSink::Entry () from /usr/local/lib/libwxc-gtk2.4.2-0.8.so
#2  0x403fc446 in wxThreadInternal::PthreadStart ()
   from /usr/local/lib/libwxc-gtk2.4.2-0.8.so
#3  0x405cb9b4 in start_thread () from /lib/tls/libpthread.so.0
#4  0x00000000 in ?? ()
(gdb) 


I don't know wether that is already helpfull to you or not.  How do I compile
wxhaskell with full debugging information?  I noticed that there is something
like wxcd in makefile.lib but there does not seem to be an accompanying 
parameter in the configure script.


Cheers,

Bene


PS:

I originally intented not to write this email to the wxhaskell mailing list, as
I wasn't sure wether this email was interesting to it.  And I had it only cc'ed to 
Daniel Fischer (who happened to post another one of our problems yesterday evening 
and is that colleque of mine I mentioned before).  But I just had to realize that
your spam filter blocked my email.  


-- 
Benedikt Grundmann

For animals, the entire universe has been neatly divided into things 
to (a) mate with, (b) eat, (c) run away from, and (d) rocks.
--- (Terry Pratchett, Equal Rites) ---