[Qgis-user] Crashing with snapping and WFS !?

[Michael Dufty]

I think I recall checking and a bug report was already there, but I can't find it now, so can have a go.

From: Alessandro Pasotti <apasotti at gmail.com>
Sent: Friday, 22 October 2021 4:33 PM
To: Michael Dufty <MDufty at mbsenvironmental.com.au>
Cc: Lars I. Nielsen <lin at lifa.dk>; qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] Crashing with snapping and WFS !?

Hi,

this really sounds like a bug, can you file a ticket if there isn't one already?

On Fri, Oct 22, 2021 at 4:16 AM Michael Dufty <MDufty at mbsenvironmental.com.au<mailto:MDufty at mbsenvironmental.com.au>> wrote:
I'm not sure if its related, but I often have issues with snapping and arcgis rest layers.  The problem is if snapping is enabled QGIS will index the entire layer.  If it happens to be a national dataset - the sort of thing web layers are great for, this can take an hour or so, with QGIS unresponsive for the whole time often it won't actually crash if you are patient enough, but better to force quit if you have saved.  Often I don't even want to snap to that layer, just accidentally had snap to all layers enabled, and once you realise it is happening it is too late to save the setting.  Even worse the settings only seem to be available when snap is enabled, so to fix it, you need to hide the layer, turn snap on, change the settings, then turn the layers back on.

Michael Dufty
-----Original Message-----
From: Qgis-user <qgis-user-bounces at lists.osgeo.org<mailto:qgis-user-bounces at lists.osgeo.org>> On Behalf Of Lars I. Nielsen
Sent: Wednesday, 20 October 2021 7:29 PM
To: Julien Cabieces <julien.cabieces at oslandia.com<mailto:julien.cabieces at oslandia.com>>
Cc: qgis-user at lists.osgeo.org<mailto:qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] Crashing with snapping and WFS !?

Thanks Julien.

It's on Windows. It's at a customer, so I'm not entirely sure what version, except that it's Windows 10.

I did a bug report on it: # 45589.

Cheers
Lars

-----Oprindelig meddelelse-----
Fra: Julien Cabieces [mailto:julien.cabieces at oslandia.com<mailto:julien.cabieces at oslandia.com>]
Sendt: 18. oktober 2021 09:15
Til: Lars I. Nielsen
Cc: qgis-user at lists.osgeo.org<mailto:qgis-user at lists.osgeo.org>
Emne: Re: [Qgis-user] Crashing with snapping and WFS !?


Hi,


Could you please open an issue here https://github.com/qgis/QGIS/issues
?

Does it happen on Linux or Windows ?

Do you manage to reproduce the issue every time or it happen randomly?

Kind regards,
Julien

> Hi list.
>
>
>
> We’re running a dataset via WFS (Geoserver 2.16) into QGIS.
>
> The user has snap turned on while digitizing/editing, and too often this combo results in QGIS crashing.
>
>
>
> However, this crash does not happen when digitizing/editing, but during other operations like panning the map or something similar.
>
>
>
> The stack dump mentions “snapPoint”, “snapToMap”, “nearestVertex”, and “closestVertex”, which to me implies the snapping function in action.
>
> It also mentions “canvasMoveEvent”, which to me implies a panning operation.
>
>
>
> I expect the snapping operation to be entirely local, i.e. independent of actual data source type, but this apparently only happens when using a WFS data source.
>
>
>
> Can anyone shed some light on this unexpected behavior ? Is it a bug ?
>
>
>
> Here’s the crash dialog box:
>
> *
>
>
>
> QGIS is version 3.16.10, as the stack dump shows.
>
>
>
>
>
> Med venlig hilsen
>
> Lars I. Nielsen
> GIS-kons., FME+Python Certified Professional
> GeoData
>
>
>
> *
>  Dir. +4563136849
>  Tlf.  +4563136800
>  Mail  +lin at lifa.dk<mailto:lin at lifa.dk>
> *
>
>
>
> LIFA A/S · Tlf +4563136800 · lifa.dk<http://lifa.dk> · CVRI20937289
>
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--
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