Re: [gentoo-user] KAudioCreator - Stopped Working

[Alan McKinnon]

On Thursday 24 April 2008, Paul Sobey wrote:
> Some time in the last three months (last time I bought a new CD!),
> KAudioCreator has stopped working on my system, Running from a shell
> gives the following:
>
> *** glibc detected *** kaudiocreator: malloc(): memory corruption:
> 0x081ccb38 ***

I believe this is called a "bug".

Quite a serious one actually and the corruption is happening in 
kaudiocreator's heap. Assuming your environment and CFLAGS are sane, I 
would try looking for a workaround. Perhaps the memory corruption is 
triggered by some code that you can remove via USE flags. Remove all 
USE flags for that package, recompile and see what happens.

I doubt you will have much luck, all the USE flags are for useful stuff 
and chances are you'll want them.

I'd file a bug at bugs.gentoo.org with the output you have. With luck 
some dev will ask for more info and tell you how to get it in an effort 
to track it down.

You could also use a different app, it's not like kaudiocreator is 
software with a totally unique purpose


> ======= Backtrace: =========
> /lib/libc.so.6[0x4a953a00]
> /lib/libc.so.6[0x4a955cbb]
> /lib/libc.so.6(__libc_malloc+0x7e)[0x4a95730e]
> /usr/lib/gcc/i686-pc-linux-gnu/4.1.2/libstdc++.so.6(_Znwj+0x29)[0x4ab
>33459]
> /usr/lib/gcc/i686-pc-linux-gnu/4.1.2/libstdc++.so.6(_Znaj+0x1d)[0x4ab
>33579]
> /usr/qt/3/lib/libqt-mt.so.3(_ZN7QString9setLengthEj+0x39)[0x4b2a4d93]
> /usr/qt/3/lib/libqt-mt.so.3[0x4b2a77d0]
> /usr/qt/3/lib/libqt-mt.so.3(_ZNK7QString3argExii+0xa4)[0x4b2ad4ba]
> kaudiocreator[0x805d72f]
> [0x2a0001f]
> ======= Memory map: ========
> 08047000-08097000 r-xp 00000000 08:03 267795
> /usr/kde/3.5/bin/kaudiocreator
> 08097000-08098000 r--p 00050000 08:03 267795
> /usr/kde/3.5/bin/kaudiocreator
> 08098000-0809a000 rw-p 00051000 08:03 267795
> /usr/kde/3.5/bin/kaudiocreator
> 0809b000-0812d000 rw-p 00052000 08:03 267795
> /usr/kde/3.5/bin/kaudiocreator
> 0812d000-081e4000 rw-p 0812d000 00:00 0          [heap]
>
> ... etc.
>
> How can I troubleshoot this? I've tried re-emerging, revdep-rebuild
> (doesn't rebuild anything), re-emerging kdemultimedia-kioslaves just
> in case, and now I'm out of ideas.
>
> Thanks all,
>
> Paul



-- 
Alan McKinnon
alan dot mckinnon at gmail dot com

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