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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/120081/">https://git.reviewboard.kde.org/r/120081/</a>
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<div>Review request for KDE Software on Mac OS X and KDevelop.</div>
<div>By René J.V. Bertin.</div>
<p style="color: grey;"><i>Updated Sept. 6, 2014, 3:50 p.m.</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Changes</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;">modified the comment as requested.</pre>
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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;">On OS X, kdevelop would crash after clicking on the "Finish Review" button, at least when the path review tool was started through a project's git->differences. This crash occurred with the current stable release (kdevplatform 1.6.0) through the 4.7ß up to and including kdevplatform git/kde4-legacy.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">The crash would be deep inside Qt, seemingly mouse action/event related. Googling the actual function in which the crash occurred led to the hypothesis a QObject derived object might be disposed of via <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">delete m_obj</code> instead of <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">m_obj->deleteLate()</code> as appears to be the correct way of doing things (http://qt-project.org/forums/viewthread/38406/#162801).</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">More details, with referring links and backtraces are here: https://bugs.kde.org/show_bug.cgi?id=338829</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">A single line change in the PatchReviewPlugin destructor, following this knowledge, seems indeed to be the required fix to prevent the crash. I have not made this a platform-specific change as the online information I found doesn't say anything about whether or not the requirement is valid for OS X only.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I ignore to what extent Qt5 has relaxed the disposal requirements on QObjects but presume it will continue to be a good idea to use ->deleteAll() . I presume Qt has some kind of garbage collection, if so, one should leave object disposal to the GC and not do it the hard way.</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;">Works (i.e. no more crashing) under OS X 10.6.8, with kdelibs git/4.14 and the other dependencies at KDE/MacPorts 4.12.5 . kdevplatform and kdevelop are built using gcc 4.8.3 from MacPorts (due to the C++11 requirement).</p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> (updated)</h1>
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<li>plugins/patchreview/patchreview.cpp <span style="color: grey">(2977c40)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/120081/diff/" style="margin-left: 3em;">View Diff</a></p>
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