[Marble-devel] segfault with an example using current svn

[Torsten Rahn]

Hey Patrick,

Any idea why this happens? - I guess it was introduced by your changes ;-)

Torsten

On Thursday 02 October 2008 07:53:02 Arnd Baecker wrote:
> Hi marble experts!
>
> I am trying to get a test working which used to compile (and run)
> fine about 2 months ago
> I put http://pastebin.com/m78585f3e into marble/tests
> and added marble_add_test( MarbleWidgetTest2 ) to CMakeLists.txt
> The compile works, but gives this warning/error:
>
>  [101%] Generating MarbleWidgetTest2.moc
>
> /NBB/INSTALL_SOFTWARE/Marble/MarbleOSMTest/marble/tests/MarbleWidgetTest2.c
>pp:0: Warning: No relevant classes found. No output generated.
>  [101%] Building CXX object
> tests/CMakeFiles/MarbleWidgetTest2.dir/MarbleWidgetTest2.o
>  Linking CXX executable MarbleWidgetTest2
>
>
> Starting the resulting executable gives: http://pastebin.com/m11f07fb1
>
> The crash happens in
> 0xb7ded2c6 in Marble::GeoDataGeometry::setAltitudeMode ()
>    from
> /NBB/INSTALL_SOFTWARE/Marble/MarbleOSMTest/marble/src/lib/libmarblewidget.s
>o.6 so commenting out the `marble.addPlaceMarkData(kml);` leads to a working
> code!
> Note that the kml passed in http://pastebin.com/m78585f3e contains the
> line `<altitudeMode>clampToGround</altitudeMode>`.
> Removing this line, gives a segfault in
> 0xb7dd6276 in Marble::GeoDataGeometry::setExtrude ()
> Removing the `<extrude>1</extrude>` leads to a segfault in
> 0xb7dfbc13 in Marble::MarbleGeometryModel::Private::mapFeature ().
>
> Maybe I am doing something wrong with this example, but
> as this used to work in the past it seems like a regression to me.
> ((BTW: also the src/lib/tests/KMLTest segfaults for me, this one in
> 0xb7d9bc4e in Marble::GeoDataPlacemark::pack () )).
> Can you reproduce any of these crashes?
>
> Concerning the examples/test in marble/src/lib/tests:
> If I remember correctly, MarbleWidgetTest.cpp used to be an
> example, which could be started to display a simple map widget,
> it seems that now it "just" does a unit test.
>
> I think it would be good, if a stand-alone example for minimal
> marble usage was in svn; eg., http://pastebin.com/m78585f3e
> might (in principle) be helpful.
> Note that this is only a slight modification of some previous
> marble/src/lib/tests/MarbleWidgetTest.cpp
> (which is now a bit different).
>
> Torsten suggested that I add this to
> http://techbase.kde.org/Development/Tutorials/MarbleWidget
> This is fine for me, even though I don't know enough of cmake
> to make this fully stand-alone
> (i.e. I only know how to put this into marble/tests and
> add the corresponding line into CMakeLists.txt).
>
> So should I just go ahead and add it at the end of the Tutorial,
> or do you have any other suggestions?
>
> Best,
>
> Arnd
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