[Qgis-user] QGIS 2.18.2 Crashes often on Mac (Yosemite 10.10.5)

Wed Mar 29 18:39:56 PDT 2017

The relevant response from John H was:

"Your stack indicates the Qt crashed trying to draw an ellipse, as
invoked by QGIS while attempting to start rendering of a marker symbol.
This is probably a straightforward crash to resolve by someone familiar
with the code."

I'm new to using these lists and fairly new to QGIS. Should I file this as
a bug with the QGIS group?

On Wed, Mar 29, 2017 at 6:37 PM, NPE NewPathEconometrics <
newpatheconometrics at gmail.com> wrote:

> Being new to using these lists, I accidentally responded just to a person,
> and not the list, so I'm forwarding my response to the list
> ---------- Forwarded message ----------
> From: NPE NewPathEconometrics <newpatheconometrics at gmail.com>
> Date: Sun, Mar 26, 2017 at 10:16 AM
> Subject: Re: [Qgis-user] QGIS 2.18.2 Crashes often on Mac (Yosemite
> 10.10.5)
> To: John Hawkinson <jhawk at mit.edu>
>
>
> Thank you for the thoughtful suggestions. I don't have a lot of experience
> digging into these types of crash reports, and I wasn't sure if the
> information in that report would be of interest to anybody. I pasted the
> full report into pastebin as you suggested (thanks for that idea, I had not
> heard of pastebin before).
>
> http://pastebin.com/Jcb4FH04
>
> This time, it lists thread 27 as the crashed thread. I looked through the
> report for details of that, and see this information, thought I don't
> really understand what this tells me, or how to resolve this.
>
>
>    1. Thread 27 Crashed:: Thread (pooled)
>    2. 0   QtGui                           0x0000000111fb946b
>    QPaintEngine::drawEllipse(QRectF const&) + 75
>    3. 1   QtGui                           0x0000000111fb8409
>    QPaintEngine::drawEllipse(QRect const&) + 73
>    4. 2   QtGui                           0x0000000111fccd0c
>    QPainter::begin(QPaintDevice*) + 476
>    5. 3   org.qgis.qgis2_core             0x0000000110ea178b
>    QgsSimpleMarkerSymbolLayerV2::prepareCache(QgsSymbolV2RenderContext&)
>    + 405
>    6. 4   org.qgis.qgis2_core             0x0000000110ea150e
>    QgsSimpleMarkerSymbolLayerV2::startRender(QgsSymbolV2RenderContext&) +
>    1276
>    7. 5   org.qgis.qgis2_core             0x0000000110f0f6fa
>    QgsSymbolV2::startRender(QgsRenderContext&, QgsFields const*) + 660
>    8. 6   org.qgis.qgis2_core             0x0000000110e2ee5a
>    QgsCategorizedSymbolRendererV2::startRender(QgsRenderContext&,
>    QgsFields const&) + 548
>    9. 7   org.qgis.qgis2_core             0x000000011120f000
>    QgsVectorLayerRenderer::render() + 194
>    10. 8   org.qgis.qgis2_core             0x00000001110c15e3
>    QgsMapRendererParallelJob::renderLayerStatic(LayerRenderJob&) + 59
>    11. 9   org.qgis.qgis2_core             0x00000001110c1fb8
>    QtConcurrent::MapKernel<QList<LayerRenderJob>::iterator,
>    QtConcurrent::FunctionWrapper1<void, LayerRenderJob&>
>    >::runIteration(QList<LayerRenderJob>::iterator, int, void*) + 16
>    12. 10  org.qgis.qgis2_core             0x00000001110c1ffc
>    QtConcurrent::MapKernel<QList<LayerRenderJob>::iterator,
>    QtConcurrent::FunctionWrapper1<void, LayerRenderJob&>
>    >::runIterations(QList<LayerRenderJob>::iterator, int, int, void*) + 64
>    13. 11  org.qgis.qgis2_core             0x00000001110c213b
>    QtConcurrent::IterateKernel<QList<LayerRenderJob>::iterator,
>    void>::forThreadFunction() + 227
>    14. 12  QtCore                          0x0000000111a97559
>    QtConcurrent::ThreadEngineBase::run() + 57
>    15. 13  QtCore                          0x0000000111a9a32d
>    QThreadPoolThread::run() + 205
>    16. 14  QtCore                          0x0000000111aa73f4
>    QThreadPrivate::start(void*) + 356
>    17. 15  libsystem_pthread.dylib         0x00007fff8e6dd05a
>    _pthread_body + 131
>    18. 16  libsystem_pthread.dylib         0x00007fff8e6dcfd7
>    _pthread_start + 176
>    19. 17  libsystem_pthread.dylib         0x00007fff8e6da3ed
>    thread_start + 13
>    20.
>
>
>
> On Sat, Mar 25, 2017 at 4:18 PM, John Hawkinson <jhawk at mit.edu> wrote:
>
>> I don't have a lot of QGIS experience (none prior to 2.18), and I have
>> seen
>> more crashes than I would like (mostly related to Cocoa), but I would
>> offer some general comments:
>>
>> > I did note this warning there: *WARNING: QGIS will crash if Qt4
>> > developer components are installed in the standard /Developer
>> > location. Either rename /Developer/Applications/Qt/Plugins or
>> > uninstall Qt before running QGIS.*
>> >
>> > I don't have Qt4 developer installed there, but I'm wondering why QGIS
>> is
>> > crashing so often, and this warning is the best clue I have.
>>
>> This is not related. Both because you don't have Qt4 developer stuff
>> installed, and also because I believe the warning is about a deterministic
>> crash -- that QGIS will *always* crash if those incompatible components
>> are
>> installed, not that it will be unstable, which is what you are saying.
>>
>> > I did put a post on Stack Exchange over a week ago, with some of the
>> crash
>> > information:
>> > http://gis.stackexchange.com/questions/230576/qgis-crashes-f
>> requently-since-upgrading-to-2-18-2-on-mac
>> > No responses from that post.
>>
>> There is not enough information in your post to be useful.
>> You write:
>>
>> | (I'm not pasting the entire report because it is pretty long):
>>
>> You should probably get over this, or at least get some background
>> on what information is important. It is not always the beginning
>> of the report. It might be helpful to post the report to pastebin.com
>> or gist.github.com and provide a link, though.
>>
>> Specifically, when your crash report says:
>>
>> > Crashed Thread:        18  Thread (pooled)
>>
>> Then the stack trace for Thread 18 is what's of interest. In your
>> report, you included only the first thread (Thread 0), and only the
>> first 11 (0-10) frames of that stack. To be helpful, you should include
>> the entirety of the stack of the thread in question.
>>
>> --jhawk at mit.edu
>>   John Hawkinson
>>
>
>
>
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