Merge pull request #7116 from rldhont/processing-infinite-loop-in-refresh-algorithms-tree-218

[BUGFIX][Processing] Infinite loop in refresh algorithms tree 2.18

Author: rldhont

python/plugins/processing/core/Processing.py

@@ -67,6 +67,8 @@
 
 class Processing:
 
+    currentlyUpdatingAlgList = False
+
     providers = []
 
     # Same structure as algs in algList
@@ -179,10 +181,14 @@ def updateAlgsList():
         requires the list of algorithms to be created again from
         algorithm providers.
         """
+        if Processing.currentlyUpdatingAlgList:
+            return
+        Processing.currentlyUpdatingAlgList = True
         QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
         for p in Processing.providers:
             Processing.reloadProvider(p.getName())
         QApplication.restoreOverrideCursor()
+        Processing.currentlyUpdatingAlgList = False
 
     @staticmethod
     def reloadProvider(providerName):

python/plugins/processing/gui/ProcessingToolbox.py

@@ -374,7 +374,6 @@ def __init__(self, providerName, tree, toolbox):
 
     def refresh(self):
         self.takeChildren()
-        Processing.updateAlgsList()
         self.populate()
 
     def populate(self):