[processing] Fix preconfigured alg creation (fixes #15100)

wonder-sk · wonder-sk · commit 47eae5865abf · 2016-07-05T19:32:33.000+02:00
diff --git a/python/plugins/processing/preconfigured/NewPreconfiguredAlgorithmAction.py b/python/plugins/processing/preconfigured/NewPreconfiguredAlgorithmAction.py
@@ -42,5 +42,6 @@ def isEnabled(self):
                 not isinstance(self.itemData, PreconfiguredAlgorithm))
 
     def execute(self):
-        dlg = PreconfiguredAlgorithmDialog(self.itemData, self.toolbox)
+        alg = self.itemData.getCopy()  # make copy so we do not taint the original one in the dialog
+        dlg = PreconfiguredAlgorithmDialog(alg, self.toolbox)
         dlg.exec_()
