TypeError: unable to convert a C++ 'QPointer<QgsMapLayer>' instance to a Python object

[jakimowb]

What is the bug or the crash?

The QgsexpresisonContextUtils allows to add add layer specific variables to a QgsExpressionContext.

However, accessing the "layer" variable in python raises a python error (see code example below):

TypeError: unable to convert a C++ 'QPointer' instance to a Python object

Steps to reproduce the issue

The following python creates a vector layer and wants to asses it from a QgsExpressionContext:

from qgis.core import QgsExpressionContext, QgsVectorLayer, QgsExpressionContextUtils

lyr = QgsVectorLayer('point?crs=epsg:4326&field=id:integer', 'dummy', 'memory')

context = QgsExpressionContext()
context.appendScope(QgsExpressionContextUtils.layerScope(lyr))
lyr2 = context.variable('layer')

Versions

QGIS 3.24 and QGIS 3.25 (master) OSGeo4W & Ubuntu 20.04

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response

[nyalldawson]

This should already be fixed. Can you confirm which revision of master of you're using?

[jakimowb]

Obviously I should pull the master more frequently. You are right, it's fixed. Thank's a lot.