[QGIS-Developer] Crashes on exit

[Andreas Neumann]

Hi, 

Unfortunately I am of no good use currently to test this, as I just
recently switched jobs and currently only have access to Linux as
sysadmin. In Windows I currently don't have admin rights. And I don't
own a private copy of Windows. I am working on getting admin rights on
Windows as well, but it might take a few days/weeks to get that from the
central IT services. First need to convince them that I am trustworthy
and that it is useful for me to have the admin rights. 

But I am pretty sure that others who reported that issue would be
willing to help. 

However, if these crashes happen on Linux I can provide proper stack
traces with debug symbols enabled. 

Greetings, 

Andreas 

On 2019-07-18 08:54, Mathieu Pellerin wrote:

> In the meantime, if we have fellow Andreas able to reproduce an exit crash, let's help him install the debug package and get a valid trace? 
> 
> Andreas, that is, if you're game. 
> 
> Math 
> 
> On Thu, Jul 18, 2019, 13:51 Nathan Woodrow <madmanwoo at gmail.com> wrote: 
> Yeah, in this case, the stack trace is wrong because of the lack of symbols.  The symbols could be installed with QGIS at the increase of package size but maybe we can do that for a while until we catch this issue. 
> 
> At the moment installing the symbols for the normal installer versions of QGIS is a bit hard for most users. 
> 
> Jurgen, would we be able to include the debug symbols for the build on the normal installers for once release cycle while this is still an issue? That would be super handy to catch this and other issues that come up. 
> 
> On Thu, Jul 18, 2019 at 4:44 PM Mathieu Pellerin <nirvn.asia at gmail.com> wrote: 
> While discussing this further with Nathan, disabling the crash reporter might not be the right solution as it'd most likely bring the OS crash dialog anyways. 
> 
> We'd need for the crash reporter to detect specific traces and silently fail when it detects a useless / harmless trace. 
> 
> There's also the problem of ppl pasting wrong traces due to not having installed the debug package, we could improve the notification in this scenario to suggest installing package. 
> 
> On Thu, Jul 18, 2019, 13:35 Andreas Neumann <a.neumann at carto.net> wrote: 
> 
> Hi Nyall, 
> 
> Thanks for the reply. I also experienced quite a lot of these crashes. Something that often shows up in the stack trace is 
> 
> proj_lpz_dist :
> proj_lpz_dist :
> QgsCoordinateTransform::transformPolygon :
> QgsCoordinateTransform::transformPolygon :
> QgsCoordinateTransform::QgsCoordinateTransform :
> QHashData::free_helper :
> QgsCoordinateTransform::addToCache :
> QgsCoordinateTransform::invalidateCache :
> QgsApplication::exitQgis :
> QgisApp::~QgisApp :
> CPLStringList::operator char * __ptr64 * __ptr64 :
> main :
> BaseThreadInitThunk :
> RtlUserThreadStart : 
> 
> Like in https://github.com/qgis/QGIS/issues/30753 
> 
> But I am sure you also came across these. 
> 
> Really annoying. Perhaps disabling the crash reporter on QGIS exit on the release versions would help? Can we enable them just on the master? 
> 
> Andreas 
> 
> On 2019-07-18 08:19, Nyall Dawson wrote: 
> On Thu, 18 Jul 2019 at 16:05, Andreas Neumann <a.neumann at carto.net> wrote: 
> Hi QGIS core devs,
> 
> Currently on the Github issues I have the (subjective) feeling that every third report is about QGIS crashing on closing the program. It seems to be a really wide-spread issue that a majority of our users have. It would be great for QGIS' reputation if we could fix this/these issue(s). Or has this already been fixed and people don't use the newest versions? 
> These are VERY frustrating. It's actually a bunch of different
> underlying issues causing this. We've probably squashed a dozen or so,
> but they keep resurfacing (or being re-introduced), and none of the
> existing bug reports have clues on remaining causes.
> 
> Fortunately they are harmless. Mathieu has previously suggested we
> just shut down the crash reporter on QGIS exit to avoid this -- I
> think that would be a worthwhile change.
> 
> Nyall

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