QGIS » QGIS Application

Since commit:c83261395476b62f6, https://github.com/qgis/QGIS/commit/c83261395476b62f6, adding or removing preconfigured algorithms leads to a loop that causes an exception:

<pre>
Traceback *RuntimeError: maximum recursion depth exceeded*
@Traceback (most recent call last):
File "C:/PROGRA~1/QGIS2~1.18/apps/qgis-ltr/./python/plugins\processing\gui\ProcessingToolbox.py", line 163, in updateProvider
item.refresh()
File "C:/PROGRA~1/QGIS2~1.18/apps/qgis-ltr/./python/plugins\processing\gui\ProcessingToolbox.py", line 377, in refresh
Processing.updateAlgsList()
File "C:/PROGRA~1/QGIS2~1.18/apps/qgis-ltr/./python/plugins\processing\core\Processing.py", line 184, in updateAlgsList
Processing.reloadProvider(p.getName())
File "C:/PROGRA~1/QGIS2~1.18/apps/qgis-ltr/./python/plugins\processing\core\Processing.py", line 189, in reloadProvider
algList.reloadProvider(providerName)
File "C:/PROGRA~1/QGIS2~1.18/apps/qgis-ltr/./python/plugins\processing\core\alglist.py", line 55, in reloadProvider
p.loadAlgorithms()
File "C:/PROGRA~1/QGIS2~1.18/apps/qgis-ltr/./python/plugins\processing\core\AlgorithmProvider.py", line 56, in loadAlgorithms
self._loadAlgorithms()
File "C:/PROGRA~1/QGIS2~1.18/apps/qgis-ltr/./python/plugins\processing\modeler\ModelerOnlyAlgorithmProvider.py", line 53, in _loadAlgorithms
self.algs = [CalculatorModelerAlgorithm(),
File "C:/PROGRA~1/QGIS2~1.18/apps/qgis-ltr/./python/plugins\processing\core\GeoAlgorithm.py", line 88, in __init__
self.defineCharacteristics()
File "C:/PROGRA~1/QGIS2~1.18/apps/qgis-ltr/./python/plugins\processing\modeler\CalculatorModelerAlgorithm.py", line 54, in defineCharacteristics
self.tr('Formula', 'CalculatorModelerAlgorithm'), ''))
RuntimeError: maximum recursion depth exceeded
</pre> @

What worse, this exception is recurrent, making QGIS unusable until it's killed.