[Qgis-user] Vertex Tool instabilities

[Matthias Kuhn]

Hi Andreas,

Can you open an issue report for this with the contents from the crash 
dialog in there?

Thanks a lot

Matthias

On 8/15/19 9:07 AM, Andreas Wicht wrote:
> Hi there,
>
> lately I observed the following:
> I was using the Vertex Tool quite a lot lately as I had to adjust
> polygon boundaries in a larger layer (PostGIS table ~60.000 polygons).
> The layer and the QGIS project use CRS 3857.
> As I am aware of snapping issues I usually take care that snapping is
> only enabled for layers where I really need it.
> As QGIS enables snapping for each layer loaded (when setting enable
> snapping by default in the settings, I guess) I forgot to turn it off
> for some point layers (millions of features - address point layer) I
> added later as a background reference. Those layers were using CRS
> 4326 and therefore re-projecting on-the-fly.
> As soon as those were in the mix QGIS started to crash very frequently
> (>10x per hour) when using the Vertex Tool.
> After some time and frustration I noticed the snapping options and
> disabled snapping for those point layers and the crashes stopped
> immediately (no crashes for days).
> The crashes appeared ONLY when using the Vertex Tool for me. Splitting
> or reshaping features worked just as expected.
>
> I know this is a very vague and not very technical description of a
> problem which can be very frustrating to users who do not see the
> connection between the snapping options, re-projecting on-the-fly and
> those crashes.
>
> I do not know if it is a Vertex Tool or re-projecting issue... or a
> combination of both as other tools work fine.
>
> QGIS Version 3.8.0 (OSGeo4W installer)
> Win10
> PostGIS 2.5.2
>
> Cheers
> Andreas
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