[QGIS-Developer] QGIS Debug build fails to launch in QtCreator

[Tim Sutton]

Sorry my second message on this thread was probably a red herring - if I
run as sudo QGIS starts fine....

Regards

Tim

On Thu, Sep 3, 2020 at 11:48 PM Tim Sutton <tim at kartoza.com> wrote:

> Hi
>
> By the way poking around with it a bit more it seems to be crashing on
> this line @Nyal:
>
> 39fbc2ac331 src/core/qgsproject.cpp (Nyall Dawson               2020-08-31
> 10:30:20 +1000)   mMainAnnotationLayer->setTransformContext( context );
>
> Regards
>
> Tim
>
>
> On Thu, Sep 3, 2020 at 10:02 PM Tim Sutton <tim at kartoza.com> wrote:
>
>> Dear QGIS Developers
>>
>> I am trying to run QGIS in debug mode in Qt-Creator. When I launch the
>> QGIS executable from QtCreator, I can see the application starting up but
>> then after a short time it crashes out. This happens both when I press the
>> green 'Run' triangle icon and when I press the green 'Start Debugging of
>> Target Project' triangle icon.
>>
>> I am building on pop_os! (essentially Ubuntu 20.04, 64 bit) using GCC
>> without CCache and I have CMAKE_BUILD_TYPE set to Debug.
>>
>> After starting QGIS it thinks for a while and then dies with the
>> following (full log of messages here [1]).
>>
>> 21:21:14: Debugging starts
>> src/app/main.cpp:505 : (main) [0ms] Starting qgis main
>> src/core/qgsmessagelog.cpp:29 : (logMessage) [379ms] 2020-09-03T21:21:45
>> [1] Successfully loaded globalsettingsfile path:
>> /home/timlinux/dev/cpp/QGIS-Debug-Build/output/data/resources/qgis_global_settings.ini
>> src/core/qgscolorramp.cpp:732 : (loadFile) [103ms] filename=
>> /home/timlinux/dev/cpp/QGIS-Debug-Build/output/data/resources/cpt-city-qgis-min/grass/elevation.svg
>> loaded=0
>> QGIS died on signal 11Could not attach to process.  If your uid matches
>> the uid of the target
>> process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try
>> again as the root user.  For more details, see
>> /etc/sysctl.d/10-ptrace.conf
>> warning: process 223467 is already traced by process 223447
>> ptrace: Operation not permitted.
>> No thread selected
>> No stack.
>> gdb returned 256
>> 21:30:39: Debugging has finished
>>
>>
>>
>> When I googled the ptrace error message above I found this StackOverflow
>> post[2] which seems to address the same issue. However, even after trying
>> all the various hints listed there, I still have the crash whenever I try
>> to launch QGIS in debug mode, or outside of a debugger.
>>
>> Has anyone else experienced this? Can you help me fix it?
>>
>> Many thanks!
>>
>> Regards
>>
>> Tim
>>
>>
>> [1] https://gist.github.com/timlinux/ac7468675e08f18428e3fe60d7e9633c
>> [2]
>> https://stackoverflow.com/questions/22120711/qt-creator-ptrace-operation-not-permitted-what-is-the-permanent-solution/30486572
>>
>>
>>
>> --
>>
>> ------------------------------------------------------------------------------------------
>>
>> Tim Sutton
>> Visit http://kartoza.com to find out about open source:
>>  * Desktop GIS programming services
>>  * Geospatial web development
>> * GIS Training
>> * Consulting Services
>> Skype: timlinux Irc: timlinux on #qgis at freenode.net
>> Tim is a member of the QGIS Project Steering Committee
>>
>> -------------------------------------------------------------------------------------------
>> Kartoza is a merger between Linfiniti and Afrispatial
>>
>
>
> --
>
> ------------------------------------------------------------------------------------------
>
> Tim Sutton
> Visit http://kartoza.com to find out about open source:
>  * Desktop GIS programming services
>  * Geospatial web development
> * GIS Training
> * Consulting Services
> Skype: timlinux Irc: timlinux on #qgis at freenode.net
> Tim is a member of the QGIS Project Steering Committee
>
> -------------------------------------------------------------------------------------------
> Kartoza is a merger between Linfiniti and Afrispatial
>


-- 
------------------------------------------------------------------------------------------
​

Tim Sutton
Visit http://kartoza.com to find out about open source:
 * Desktop GIS programming services
 * Geospatial web development
* GIS Training
* Consulting Services
Skype: timlinux Irc: timlinux on #qgis at freenode.net
Tim is a member of the QGIS Project Steering Committee
-------------------------------------------------------------------------------------------
Kartoza is a merger between Linfiniti and Afrispatial
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