[Qgis-user] QGIS crashing to desktop, doesn't make log file, how to investigate?

[Richard Duivenvoorde]

Hi Sean,

If you install QGIS nightlies (so development version: the qgis-dev package in osgeo4w) you get a QGIS build with QGSDEBUG (according to [1]).

On windows (and setting the environment variable QGIS_DEBUG to eg 5 ) you can then see the debug info if you install Microsoft Debugview you can see the debug messages of QGIS and maybe spot better where it fails [2].

Note that this is often data-related. So best if you can pin this down to some part (record) of your dataset.
IF you then could make this small dataset available for testing in an issue, people could try to reproduce it.

Also note that currently I introduced an oracle issue, when you load a layer via the browser [0], but I'm working on it.
For FOSS developers with (often) no access to Oracle databases it is harder to fix this. I just learned (see [1] that I can run a docker with an Oracle db in it here locally)...

Maybe a small funding project would be an option, to get a core dev more familiar with Oracle and oracle-qgis code could try to invest some time in the open Oracle issues [4]

Hope this helps.

Regards,

Richard Duivenvoorde


[0] http://osgeo-org.1560.x6.nabble.com/How-to-see-log-debug-messages-in-Osgeo4W-installer-qgis-dev-td5047542.html
[1] https://github.com/qgis/QGIS/issues/39759
[2] https://docs.microsoft.com/en-us/sysinternals/downloads/debugview
[4] https://github.com/qgis/QGIS/issues?q=is%3Aissue+is%3Aopen+oracle

On 11/5/20 9:18 AM, Sean Batt wrote:
> [sorry if you see this twice; I sent from my work account a couple of days ago, but it’s awaiting moderation due to my big corporate signature]
> 
> Dear QGIS Users,
> Â 
> I am running QGIS 3.16.0 on Windows 2016 Server 2019 Datacenter, loading an Oracle layer then running Check Validity from the Vector geometry section of the Processing Toolbox.
> Â 
> QGIS crashes-to-desktop without leaving an error message. I would like to be able to find a work-around or at least provide more info for a bug report, but the instructions I’ve found for creating log files (set QGIS_LOG_FILE and QGIS_DEBUG in the Options -> System -> Environment Variables) have not worked. The Windows Event Log seems unhelpful, saying only:
> Â 
> Faulting application name: qgis-bin.exe, version: 0.0.0.0, time stamp: 0x5f9304c8
> Faulting module name: KERNELBASE.dll, version: 10.0.17763.1518, time stamp: 0xff301d3c
> Exception code: 0xc0000005
> Fault offset: 0x00000000000396c9
> Faulting process id: 0x12b4
> Faulting application start time: 0x01d6b0b7a76af475
> Faulting application path: C:\Program Files\QGIS 3.16\bin\qgis-bin.exe
> Faulting module path: C:\Windows\System32\KERNELBASE.dll
> Report Id: 26e55c5c-5042-4c60-a353-2a8c72434bce
> Faulting package full name:Â 
> Faulting package-relative application ID:Â 
> Â 
> I can’t say I’ve ever found a 0xc00000005 error particularly solvable.
> Â 
> I’ve just checked QGIS 3.14.16-Pi and it just works as it is supposed to, so at least I have my work-around.
> Â 
> So, how to be a good open source citizen and provide good Issue text? I thought “log file!” but maybe there’s another way?
> Â 
> If QGIS_LOG_FILE is the way to go (and it may not be as that string isn’t in the documentation as far as I can tell) can anyone help me set it more firmly than in the Environment Variables section of the Options?
> Â 
> Best Regards,
> Â 
> Sean
> 
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