Just a quick update, the fix is now in master and backported:
https://github.com/qgis/QGIS/issues/51971
https://github.com/qgis/QGIS/pull/51985
Thanks to all the devs!
Cheers
Matteo
On 2/22/23 08:33, matteo wrote:
Hi Richard,
Not very helpful for you, but what about creating an issue with the
minimal code to crash?
done: https://github.com/qgis/QGIS/issues/51971
I've prepared a minimal algorithm that mimics the problem
And about Thread/Crash problems: I have been succesful with the tips
of Nyall in:
https://lists.osgeo.org/pipermail/qgis-developer/2023-February/065525.html to create a QgsTask which either crashed or gave warnings...
One thing I've seen recently is that some Processing algs with me give
these "...is run from a different thread than the object lives in
..."-warnings.
And my feeling is that if some code is fetching references to the QGIS
application instance, it shows this warning.
Good luck solving your issue
Thanks! Some gurus around? :)
Cheers
Matteo
Regards,
Richard
On 2/21/23 16:41, matteo via QGIS-Developer wrote:
Hi devs,
I'm raising this email again because I don't know if this a
bug/limitation/correct behavior.
I also think that the problem is from a thread point of view, at
least by the crash that I have.
Knowing that a processing algorithm, as suggested by Germàn, can be
created with:
processing.createAlgorithmDialog("my_provider:my_algorithm", params)
within a plugin, if the algorithm **id** is passed as first argument,
QGIS is crashing, while it seems working on a standalone script in
the QGIS code editor.
Is this a limitation?
Cheers and thanks for any suggestion!
Matteo
On 8/1/22 15:23, matteo wrote:
Hi all,
I've a set of custom processing scripts within a plugin (that is
both "normal" and processing provider plugin).
I'm trying to executing the dialog of these algorithm from one of
the main plugin file. I found the processing.createAlgorithmDialog
[0], but it is constantly crashing when I'm passing the instance of
the algorithm:
my_alg = MyCustomAlg()
my_dialog = my_alg.createAlgorithmDialog(custom_dict)
## crash here
Thinking it was a problem of the threads I also tried to overwrite
the `flag` method in the algorithm by setting also
QgsProcessingAlgorithm.FlagNoThreading but with the same results.
I know I can run the processing algorithm with processing.run(....)
but I need to open the dialog pre-filled with custom parameters and
to get also some other outputs besides the standard ones (like the
QgsFeatureSink path)
Thanks for any suggestion
Cheers
Matteo
[0]
https://github.com/qgis/QGIS/blob/master/python/plugins/processing/tools/general.py#L155
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