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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/127237/">https://git.reviewboard.kde.org/r/127237/</a>
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<p style="margin-top: 0;">On March 7th, 2016, 9:29 p.m. UTC, <b>Gregor Mi</b> wrote:</p>
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<a href="https://git.reviewboard.kde.org/r/127237/diff/2/?file=448481#file448481line128" style="color: black; font-weight: bold; text-decoration: underline;">src/kmoretools/kmoretoolsmenufactory.cpp</a>
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(Diff revision 2)
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="c1">// Check the pointer just in case a null pointer got in somewhere</span></pre></td>
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<td bgcolor="#c5ffc4" 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">kmtService</span><span class="p">)</span> <span class="k">continue</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;">Thanks for the comment. However, as long as we don't know the root cause for the null pointers, I would feel better if the comment states clearly that we don't know what is happening and that it is happening on Windows only.</p></pre>
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<p>On March 8th, 2016, 6:36 a.m. UTC, <b>Kåre Särs</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;">This one is not needed at the moment (I did not get null pointers here), but I left it there just in case. I feel it is better to loose functionality than getting a crash ;)</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;">Then it's ok. General question: is there a common log file where one could write a message in case there is nullptr which was catched?</p></pre>
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<p style="margin-top: 0;">On March 7th, 2016, 9:29 p.m. UTC, <b>Gregor Mi</b> wrote:</p>
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<a href="https://git.reviewboard.kde.org/r/127237/diff/2/?file=448481#file448481line237" style="color: black; font-weight: bold; text-decoration: underline;">src/kmoretools/kmoretoolsmenufactory.cpp</a>
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(Diff revision 2)
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="c1">// Check the pointer just in case a null pointer got in somewhere</span></pre></td>
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<td bgcolor="#c5ffc4" 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">kmtService</span><span class="p">)</span> <span class="k">continue</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;">see my comment above</p></pre>
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<p>On March 8th, 2016, 6:36 a.m. UTC, <b>Kåre Särs</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;">same as above ;)</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;">:)</p></pre>
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<p style="margin-top: 0;">On March 7th, 2016, 9:29 p.m. UTC, <b>Gregor Mi</b> wrote:</p>
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<a href="https://git.reviewboard.kde.org/r/127237/diff/2/?file=448482#file448482line97" style="color: black; font-weight: bold; text-decoration: underline;">src/kmoretools/kmoretoolspresets.cpp</a>
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(Diff revision 2)
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">service</span><span class="o">-></span><span class="n">setHomepageUrl</span><span class="p">(</span><span class="n">QUrl</span><span class="p">(</span><span class="n">kmtServiceInfo</span><span class="p">.</span><span class="n">homepageUrl</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="n">service</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;">Again, this should not happen here, so please add a comment that this is a fix for Windows.</p></pre>
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<p>On March 8th, 2016, 6:36 a.m. UTC, <b>Kåre Särs</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;">This is the first place where we get the null pointers. KMoreTools::registerServiceByDesktopEntryName() has at least two code paths that return nullptr.
kmoretools.cpp
line 129: qCritical() << ... the kmt-desktopfile " << desktopEntryName << " is provided but no Exec line is specified ...
line 130: return nullptr;
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line 146: qCritical() << ... a kmt-desktopfile must be provided. Please fix. Return nullptr. ...
line 147: return nullptr;
These might be errors, but I would rather see that it does not crash even if a runtime file is missing. I suspect that it is the later that generates the nullptr.
This is why I check the returned pointer before using it.
QStandardPaths::GenericDataLocation does not return ../share/ on Windows and thus does not find the file</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;">Please add these findings to your code comments. Then Ship it.</p></pre>
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<p style="margin-top: 0;">On March 7th, 2016, 9:29 p.m. UTC, <b>Gregor Mi</b> wrote:</p>
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<a href="https://git.reviewboard.kde.org/r/127237/diff/2/?file=448482#file448482line165" style="color: black; font-weight: bold; text-decoration: underline;">src/kmoretools/kmoretoolspresets.cpp</a>
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(Diff revision 2)
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">kmtService</span><span class="p">)</span> <span class="p">{</span> <span class="c1">// Do not add null pointers</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">resultList</span> <span class="o"><<</span> <span class="n">kmtService</span><span class="p">;</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <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;">As above: as long as we don't know the reason for the nullpointers I would be happier if there was a comment.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">That said I don't know what the KDE policy is when dealing with this kind of problem. Just adding null checks seems to make the code more complicated to analyse later. You are a long-term committer, so your words have a high weight. On the other hand I would be interested in a second opinion.</p></pre>
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<p>On March 8th, 2016, 6:36 a.m. UTC, <b>Kåre Särs</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;">KMoreToolsPresets::registerServiceByDesktopEntryName() has one code path that returns a direct nullptr and another that calls KMoreTools::registerServiceByDesktopEntryName() that also can return a nullptr. So I cannot be sure that the pointer isn't null. So check it and don't add nullptr ;)
The problem is, with 99% certainty, the missing .desktop file, but IMO we should not crash even if a runtime file is missing ;)</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;">I agree that a missing desktop file should not be reason for a runtime crash. I wonder if there is a good way to log those errors instead of silently do nothing.</p></pre>
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<p>- Gregor</p>
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<p>On March 7th, 2016, 8:38 p.m. UTC, Kåre Särs wrote:</p>
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<div>Review request for KDE Frameworks and Gregor Mi.</div>
<div>By Kåre Särs.</div>
<p style="color: grey;"><i>Updated March 7, 2016, 8:38 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
knewstuff
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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;">On Windows we sometimes get null-pointers in stead of pointers to KMoreToolsService. This patch adds checks for null-pointers in those places that made Kate crash in the project plugin and adds a nullptr check before adding them to the list.</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;">Compiled and run on windows. No crashes in Kate when right-clicking files in the project plugin.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>src/kmoretools/kmoretoolsmenufactory.cpp <span style="color: grey">(30f4d02)</span></li>
<li>src/kmoretools/kmoretoolspresets.cpp <span style="color: grey">(2405321)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/127237/diff/" style="margin-left: 3em;">View Diff</a></p>
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