> On Feb. 5, 2016, 3:57 p.m., Martin Gräßlin wrote: > > drkonqi/drkonqi.cpp, lines 183-188 > > <https://git.reviewboard.kde.org/r/126993/diff/1/?file=442765#file442765line183> > > > > yes this is possible and there is even a Krazy check for this. The > > QWeakPointer is the proper fix to this problem. > > > > What exactly was the compile issue you run into with the QWeakPointer? > > > > I assume that: > > QWeakPointer<QFileDialog> dlg(new QFileDialog(parent, defname)); > > > > would solve your compile error.
found the explanation: https://blogs.kde.org/2009/03/26/how-crash-almost-every-qtkde-application-and-how-fix-it-0 - Martin ----------------------------------------------------------- This is an automatically generated e-mail. To reply, visit: https://git.reviewboard.kde.org/r/126993/#review92090 ----------------------------------------------------------- On Feb. 5, 2016, 3:13 p.m., René J.V. Bertin wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://git.reviewboard.kde.org/r/126993/ > ----------------------------------------------------------- > > (Updated Feb. 5, 2016, 3:13 p.m.) > > > Review request for KDE Software on Mac OS X and Plasma. > > > Repository: plasma-workspace > > > Description > ------- > > While looking to build DrKonqi for OS X/MacPorts I came across a few issues > that appear to be syntax/coding errors that, surprisingly, were never caught > before given that they also caused compile failures when I used the same > configure/build/packaging script on Linux. > > The code uses methods that no longer exist in Qt 5.5+ : > `QString::fromAscii()`, `QHeaderView::setResizeMod()` (replaced with > `QHeaderView::setSectionResizeMode()` and `QInputDialog::getInteger()` > (instead of `QInputDialog::getInt()`). Those are the easy and straightforward > ones fixed by this patch. > > The handling of file dialogs (in 2 locations) was more problematic. Both > Apple's clang "6.0.0" and gcc 5.3 (on Linux) refused statements like > `QWeakPointer<QFileDialog> dlg = new QFileDialog(parent,defname);` . My > initial attempt was to follow the documentation for QWeakPointer, and do > `QWeakPointer<QFileDialog> dlg = QSharedPointer<QFileDialog>(new > QFileDialog(parent,defname));` but that caused a crash as soon as I clicked > on the "save backtrace as" button - on both platforms. > It turned out that `QSharedPointer<QFileDialog>()` returned a valid > (non-null) shared pointer, but after creating a QWeakPointer from it, > `dlg.data()` returned NULL -- immediately. > > I had a look around in the 5.17.0 frameworks codebase, and could find no > relevant examples of using QWeakPointer; some expressions appear to be > equivalent to the original DrKonqi code, in other locations QWeakPointer > instances are indeed created "going through" a QSharedPointer. In the end I > tested using QFileDialog (and `QFileDialog::selectedUrls()` as kate5 does, > and that works (on OS X and Linux). > > That's what the attached patch does: no QFileDialog pointer at all, just an > instance. > This RR is intended to fuel a discussion on the subject, as suggested by > Aleix; therefore I left the comment about the possibility of > invalidating/deleting the file dialog e.g. through a DBus call. Is that > actually a possibility, and why wouldn't it be in Kate? Are there no other > ways to prevent it, or check for its occurrence? > > This patch also marks drkonqi as a nongui executable, a requirement on OS X > and which shouldn't cause any regressions elsewhere AFAIK. > > > Diffs > ----- > > drkonqi/CMakeLists.txt deb8c40 > drkonqi/bugzillaintegration/bugzillalib.cpp 802c5fb > drkonqi/bugzillaintegration/reportassistantpages_bugzilla.cpp e60fb14 > drkonqi/bugzillaintegration/reportassistantpages_bugzilla_duplicates.cpp > 4f8f4ea > drkonqi/drkonqi.cpp b12c118 > > Diff: https://git.reviewboard.kde.org/r/126993/diff/ > > > Testing > ------- > > On OS X 10.9.1 and Kubuntu 14.04, both with Qt 5.5.1 and KF5 5.17.0 installed > into /opt/local > > > Thanks, > > René J.V. Bertin > >
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