Review Request 111626: Fix Amarok crash with Audio CD inserted

[Commit Hook]

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This review has been submitted with commit 31fdb4ab1b72fa39290931f6a8934eda4eb4f636 by Christoph Feck to branch KDE/4.11.

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On July 21, 2013, 12:28 p.m., Christoph Feck wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/111626/
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> (Updated July 21, 2013, 12:28 p.m.)
> 
> 
> Review request for Amarok, kdelibs and Solid.
> 
> 
> Description
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> 
> https://bugs.kde.org/show_bug.cgi?id=314544#c40 says:
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> "Looking at the backtrace, KFilePlacesItem tries to detect Audio CDs as follows:
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>     Solid::Device d = device();
>     if (d.isValid()) {
>             if (m_access) {
>                 return QUrl(KUrl(m_access->filePath()));
>             } else if (m_disc && (m_disc->availableContent() & Solid::OpticalDisc::Audio)!=0) {
>                 QString device = d.as<Solid::Block>()->device();
>                 return QUrl(QString("audiocd:/?device=%1").arg(device));
>             }
>     }
> 
> The crash happens, because d.as<Solid::Block> returns 0, in other words, Audio CDs are no longer treated as block devices.
> 
> Failure of said cast can be easily detected, but the question is rather, if it's not a Solid bug, how the code needs to be modified to correctly get the audiocd:/ URL for the block device."
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> While I did not yet figure out, how I can get the block device URL for a disc in case block is 0, I propose this temporary fix. It should fix the crash, but could fail to correctly invoke the audiocd:/ kio with multiple disc drives.
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> 
> This addresses bug 314544.
>     http://bugs.kde.org/show_bug.cgi?id=314544
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> 
> Diffs
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>   kfile/kfileplacesitem.cpp 5a12486 
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> Diff: http://git.reviewboard.kde.org/r/111626/diff/
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> Testing
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> I could not test, my system has no disc drives.
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> 
> Thanks,
> 
> Christoph Feck
> 
>

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