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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/123648/">https://git.reviewboard.kde.org/r/123648/</a>
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<p style="margin-top: 0;">On May 6th, 2015, 12:57 a.m. CEST, <b>Aleix Pol Gonzalez</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;">LGTM, thanks for looking into this.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">The alternative David suggests also sounds good, maybe better but not by that much.</p></pre>
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<p>On May 6th, 2015, 1:06 a.m. CEST, <b>Sebastian Kügler</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;">Agree. I'll let the guard in as well, just to be super-safe that the crash is gone (and not reintroduced).</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Do you recall why we're also monitoring QScreen?</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;">The correct screen removed signal comes from Qt, if we use the one from KScreen we're sometimes too late and it becomes a mess because Qt tries to bodge a solution.</p></pre>
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<p>- Aleix</p>
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<p>On May 6th, 2015, 12:08 a.m. CEST, Sebastian Kügler wrote:</p>
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<div>Review request for Plasma.</div>
<div>By Sebastian Kügler.</div>
<p style="color: grey;"><i>Updated May 6, 2015, 12:08 a.m.</i></p>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://bugs.kde.org/show_bug.cgi?id=346590">346590</a>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
plasma-workspace
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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;">Guard access to kscreen configuration
reconsiderOutputs() may be called before the async config fetching
operation (KScreen::GetConfigOperation) has finished, so the pointer is
still null at that point. This can happen if qApp::screenRemoved fires
before kscreen was able to start the backend loader and pass back a
ConfigPtr.
The bug is rooted by in the dual-use of libkscreen and qApp's QScreen
handling. The timings here produce this race condition. This patch
should be quite safe, though, since it doesn't change the logic, but
rather makes sure this race condition bails out nicely by falling back
to just waiting until a kscreen config has arrived (which will happen
right after).
BUG:346590
REVIEW:
FIXED-IN:5.3.1</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;">I can't reproduce this crash myself.</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>shell/shellcorona.cpp <span style="color: grey">(558788daad66f8be7cc35955a5600ddab655cde6)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/123648/diff/" style="margin-left: 3em;">View Diff</a></p>
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