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 ***
======= 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)[0x4ab33459]
/usr/lib/gcc/i686-pc-linux-gnu/4.1.2/libstdc++.so.6(_Znaj+0x1d)[0x4ab33579]
/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
--
gentoo-user@lists.gentoo.org mailing list

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

--
gentoo-user@lists.gentoo.org mailing list

Paul Sobey wrote:

> 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.

In your $HOME/.kde/share/config directory, search for a file or file(s)
called something like kaudiocreatorrc and perhaps similar files (I do not
have it so I do not know if it perhaps uses several config files, they'll
be easily identified by name, though), and rename them. Run kbuildsycoca,
then try to start kaudiocreator again.

If that doesn't help, try renaming the directory
$HOME/.kde/share/apps/kaudiocreator, if it exists, and try again.

If it's still not working, my last resort would be to file a bug.

Anno.

--
gentoo-user@lists.gentoo.org mailing list

Anno v. Heimburg wrote:
> In your $HOME/.kde/share/config directory, search for a file or file(s)
> called something like kaudiocreatorrc and perhaps similar files (I do not
> have it so I do not know if it perhaps uses several config files, they'll
> be easily identified by name, though), and rename them. Run kbuildsycoca,
> then try to start kaudiocreator again.

Wow, well done that man! Deleting the rc made it start again. Now I wish
I'd renamed it so I could have a look inside. Perhaps worth recovering
from backups in order to file a bug. My mp3 path has changed recently,
perhaps that did it.

Meanwhile though, following Alan's suggestion I've discovered the
command line ripper abcde, and actually prefer it. Recommended!

Thanks both,
Paul
--
gentoo-user@lists.gentoo.org mailing list

Paul Sobey wrote:

> Wow, well done that man!

I got bitten by broken config files often enough in the early KDE 3.x days,
especially on minor version changes. It has gotten much better since 3.3 or
so though, I'm actually a bit suprised... Also, changing from SuSE on
reiserfs to gentoo on xfs helped big time, no hard resets necessary anmore,
and if they are, xfs is able to cope. ReiserFS would pretty regularly mess
up my config files.

> Meanwhile though, following Alan's suggestion I've discovered the
> command line ripper abcde, and actually prefer it.

Yeah, it's a simple and neat little thing. I use it, too.

And thank you for writing back to say it works, too often, people just
quietly stop posting when some suggestion did it.

Anno.


--
gentoo-user@lists.gentoo.org mailing list