QGIS freezes/crashes during check geometries

[DeadBranches]

QGIS 3.14.16 hangs at 99% while using the "Check Geometries" feature in the Vector menu for the layer in the sample file. I've isolated the crash to the geometry validity option "duplicate nodes."

Other settings are all as default. The output is to a new layer.

Windows 10 Pro N 2004 19041.450 64-bit
AMD Ryzen 5 3600
32 GB Ram

https://drive.google.com/file/d/16n87F-FtCch3MBj13Bz5Y0DR6fKQ-mfG/view?usp=sharing

[gioman]

@SalvatoryMalamar what is the exact tool your are using, "geometry checker"?

[DeadBranches]

Oops, sorry for not being clear about that. It's the check geometries tool in the Vector menu.

[gioman]

https://drive.google.com/file/d/16n87F-FtCch3MBj13Bz5Y0DR6fKQ-mfG/view?usp=sharing

@SalvatoryMalamar please open access to this sample dataset.

[DeadBranches]

My apologies gioman. Thank you for following up on the bug report. I've set the sample data set so anyone with the link can view.

[gioman]

Finishes fine on QGIS 3.10 on Linux (looking for duplicates nodes).

[gioman]

On Windows/master it seems to choke at 100%, but maybe is "just" the typical Windows slowness in running anything.

[gioman]

On Windows/master it seems to choke at 100%, but maybe is "just" the typical Windows slowness in running anything.

still unfinished here, I guess we can say that on Windows does not work.

[DeadBranches]

Thank you for verifying the validity of this bug report for Windows and Linux gioman. I appreciate your efforts.

[roya0045]

Is it with the dataset only or it happens with any dataset on windows?

[plitvicer]

Same here with different dataset. Shapefile and SQLite DB. Also testet sample dataset from @SalvatoryMalamar
Using QGIS 3.16.4, Windows 10 Pro, 16GB RAM

[gioman]

Same here with different dataset. Shapefile and SQLite DB

@plitvicer attach here your sample.

[lucbontemps]

I'm encountering the same problem.
My environment: W10 PRO, 16Gb RAM, QGis 3.16.3., CRS project EPSG:2169
I've made many tests. On a subset (about the half), it is running.
On he whole dataset, QGis crashes systematically.
Tried without "Duplicate nodes", or other functionnal variations, no changes.
Here is a sample.
Feel free to ask for further information on my context.
PARQUETS_V3.zip

[gioman]

Feel free to ask for further information on my context.

@lucbontemps crash confirmed also on 3.18 on Linux.

[nyalldawson]

@gioman

crash confirmed also on 3.18 on Linux.

What's required to reproduce this? I tried with just the "duplicate nodes" check enabled and no crash here...

[gioman]

What's required to reproduce this? I tried with just the "duplicate nodes" check enabled and no crash here...

@nyalldawson it crashes towards the end

[lucbontemps]

Tried again on most of the checkbox and any of the ones I'm using.
"Check for duplicates" makes QGis crashing.
This option is necessary and sufficient. Not the other ones.
I presume the problem is due to this function.

On the other hand QGis freezes when exporting the errors. Another topic?

[nyalldawson]

I still can't reproduce this. Maybe it was fixed in newer GEOS versions...

[lucbontemps]

Here is a video without and with "Check for duplicates".
Windows 10 Pro, QGis 3.16.

20210528_121829.mp4

[gioman]

Here is a video without and with "Check for duplicates".

@lucbontemps no crash here on 3.16 on WIndows (with our dataset) and both check duplicates or not.

[lucbontemps]

@gioman: could you try on the dataset previously sent (see above)?

[gioman]

@lucbontemps I used this:

PARQUETS_V3.zip

[DeadBranches]

Thank you @nyalldawson for your excellent work on improving QGIS. And thank you to everyone else for your great contributions in clarifying the issue.