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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/128016/">https://git.reviewboard.kde.org/r/128016/</a>
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<p style="margin-top: 0;">On May 26th, 2016, 10:56 a.m. CEST, <b>Sven Brauch</b> wrote:</p>
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<a href="https://git.reviewboard.kde.org/r/128016/diff/1/?file=465464#file465464line99" style="color: black; font-weight: bold; text-decoration: underline;">sublime/idealdockwidget.cpp</a>
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(Diff revision 1)
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">menu</span><span class="p">.</span><span class="n">addSection</span><span class="p">(</span><span class="n">windowIcon</span><span class="p">(),</span> <span class="n">m_view</span><span class="o">-></span><span class="n">document</span><span class="p">()</span><span class="o">-></span><span class="n">title</span><span class="p">());</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">menu</span><span class="p">)</span> <span class="p">{</span></pre></td>
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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;">Don't do this. It just clutters the code, and you would have to fix it in about every second line of the application anyways, should it ever happen (it doesn't on linux).</p></pre>
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<p>On May 26th, 2016, 11:08 a.m. CEST, <b>René J.V. Bertin</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 don't understand what you're implying here. Not doing this would either mean not using a pointer at all (= abandoning the patch), or not checking if the allocation succeeded. And that's not acceptable either. No matter how likely an application is to crash anyway if an allocation fails.
>From what I see this is true also when using a QScopedPointer.</p></pre>
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<p>On May 26th, 2016, 11:46 a.m. CEST, <b>Sven Brauch</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;">Nowhere in KDE code does anybody ever check if an allocation succeeds. IMO it's pedantic and useless. We are not writing life-critical software; if your system is out of memory, your IDE crashes, such is life. On Linux it doesn't do anything <em style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: normal;">anyways</em> in the default kernel configuration, since allocations always succeed.</p></pre>
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<p>On May 26th, 2016, 12:22 p.m. CEST, <b>René J.V. Bertin</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 just don't agree with that. If you really insist on not checking here, I'd propose that you remove the 2 lines in a separate commit, because I don't want to go on permanent record not doing things properly.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Writing proper code is indeed pedantic. Is it useless? What's the percentage of security fixes that we would NOT see if everyone always checked against NULL before using a pointer? </p>
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<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">allocations always succeed.</p>
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<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I'm not sure if I should be in awe for a kernel that apparently is able to provide more memory than I could ever afford to buy, or lose quite a bit of esteem for inciting lazy and sloppy programming practices...</p></pre>
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<p>On May 26th, 2016, 2:01 p.m. CEST, <b>Kai Uwe Broulik</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;">If operator new fails it throws std::bad_alloc in which case your program will blow up anyway as we don't catch exceptions anywhere.</p></pre>
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<pre style="margin-left: 1em; 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;">Tomaz posted a more detailed comment with the same gist on the ML (Tomaz: please consider replying via the website, it's twice now that I scanned in vain through the RR trying to find your contributions ;) )</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Anyway, that's more constructive, and apparently the Linux kernel has nothing to do with it. I clearly never absorbed the fact that <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">new</code> throws in case of failure, I guess I've never been sufficiently annoyed by that yet :)</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">If the check is pointless I'll remove it.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">That doesn't mean I consider it pointless to check, or handle allocation exceptions. I just hope there are no situations in which a big allocation fails that could have been handled with a nice "sorry, can't do that right now" failure message rather than a downright abort which can evidently lead to data (code) loss.</p></pre>
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<p>- René J.V.</p>
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<p>On May 26th, 2016, 1:21 p.m. CEST, René J.V. Bertin wrote:</p>
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<div>Review request for KDevelop.</div>
<div>By René J.V. Bertin.</div>
<p style="color: grey;"><i>Updated May 26, 2016, 1:21 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;">OS X can be capricious when instances corresponding to a widget are deleted, if the class in question uses "native" ObjC SDKs behind the scenes. Pending events can in that case be (generated and) delivered to objects that were already deleted.
According to the documentation, one should prefer to use <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">QObject::deleteLater()</code> rather than the regular, direct <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">delete</code> whether it be explicit or implicit.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I've long used a local patch that uses this approach in order to prevent a recurring crash after using the context menu of the "ideal dock widget". Somehow I never put it up for review here, apparently.</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;">Builds and permits reliable behaviour on both OS X and Linux.</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>sublime/idealdockwidget.cpp <span style="color: grey">(dae0ea2)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/128016/diff/" style="margin-left: 3em;">View Diff</a></p>
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