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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/120150/">https://git.reviewboard.kde.org/r/120150/</a>
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<p style="margin-top: 0;">On September 13th, 2014, 1:08 a.m. CEST, <b>Kevin Funk</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I've just a closer look at the code. It looks indeed unsafe to delete patch source which are <em style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: normal;">no</em> LocalPatchSources, (because others may access dangling pointers then, see 'showVcsDiff' function).</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">But: Is the <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">deleteLater</code> still necessary now? Is checking against <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">qobject_cast<LocalPatchSource*></code> and then just delete'ing not enough?</p></pre>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">TBH, that's a bit over my head ... what does <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">qobject_cast<LocalPatchSource*></code> do? The code currently checks if it returns true to delete/deleteLater <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">m_patch</code>, isn't that the case when <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">m_patch</code> IS a LocalPatchSource?</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Also, if access through a dangling pointer, e.g. by showVcsDiff, were to explain the crashes I've seen, why would it not crash on Linux too? Unless that's a result of differences in event handling, which kind of takes us back to my own hunch...</p></pre>
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<p>- René J.V.</p>
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<p>On September 12th, 2014, 10:30 p.m. CEST, René J.V. Bertin wrote:</p>
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<div>Review request for KDE Software on Mac OS X, KDevelop and Olivier Goffart.</div>
<div>By René J.V. Bertin.</div>
<p style="color: grey;"><i>Updated Sept. 12, 2014, 10:30 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
kdevplatform
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">In https://reviewboard.kde.org/r/120081/ I proposed an (accepted) approach to prevent kdevelop from crashing after closing the patch review ("git/show differences") toolview. I had another of those crashes after heavier-than-usual perusal of the toolview, despite the previous patch. The attached patch replaces all <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">delete</code>s of <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">QObject</code> derived class instances with <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">deleteLater()</code>.</p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">kdevplatform git/kde4-legacy on KDE/MacPorts OS X 10.6.8 . </p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>plugins/patchreview/patchreview.cpp <span style="color: grey">(18b63db)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/120150/diff/" style="margin-left: 3em;">View Diff</a></p>
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