Transform errors encountered while iterating features in

processing are non-fatal. We report them to users, and treat the
feature as having no geometry, but don't stop execution.

python/plugins/processing/core/GeoAlgorithm.py

@@ -113,7 +113,7 @@ class GeoAlgorithm(QgsProcessingAlgorithm):
         if feedback is None:
             feedback = QgsProcessingFeedback()
         if context is None:
-            context = dataobjects.createContext()
+            context = dataobjects.createContext(feedback)
 
         self.model = model
         try:
@@ -327,7 +327,7 @@ def executeAlgorithm(alg, parameters, context=None, feedback=None, model=None):
     if feedback is None:
         feedback = QgsProcessingFeedback()
     if context is None:
-        context = dataobjects.createContext()
+        context = dataobjects.createContext(feedback)
 
     #self.model = model
 

python/plugins/processing/core/Processing.py

@@ -193,11 +193,17 @@ class Processing(object):
                         return
                     i = i + 1
 
+        feedback = None
+        if kwargs is not None and "feedback" in list(kwargs.keys()):
+            feedback = kwargs["feedback"]
+        elif iface is not None:
+            feedback = MessageBarProgress(alg.displayName())
+
         context = None
         if kwargs is not None and 'context' in list(kwargs.keys()):
             context = kwargs["context"]
         else:
-            context = dataobjects.createContext()
+            context = dataobjects.createContext(feedback)
 
         ok, msg = alg.checkParameterValues(parameters, context)
         if not ok:
@@ -226,12 +232,6 @@ class Processing(object):
                 QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
                 overrideCursor = True
 
-        feedback = None
-        if kwargs is not None and "feedback" in list(kwargs.keys()):
-            feedback = kwargs["feedback"]
-        elif iface is not None:
-            feedback = MessageBarProgress(alg.displayName())
-
         ret, results = execute(alg, parameters, context, feedback)
         if ret:
             if onFinish is not None:

python/plugins/processing/gui/AlgorithmDialog.py

@@ -164,12 +164,11 @@ class AlgorithmDialog(AlgorithmDialogBase):
     def accept(self):
         super(AlgorithmDialog, self)._saveGeometry()
 
-        context = dataobjects.createContext()
+        feedback = self.createFeedback()
+        context = dataobjects.createContext(feedback)
 
         checkCRS = ProcessingConfig.getSetting(ProcessingConfig.WARN_UNMATCHING_CRS)
         try:
-            feedback = self.createFeedback()
-
             parameters = self.getParamValues()
 
             if checkCRS and not self.alg.validateInputCrs(parameters, context):

python/plugins/processing/gui/AlgorithmExecutor.py

@@ -56,7 +56,7 @@ def execute(alg, parameters, context=None, feedback=None):
     if feedback is None:
         feedback = QgsProcessingFeedback()
     if context is None:
-        context = dataobjects.createContext()
+        context = dataobjects.createContext(feedback)
 
     try:
         results, ok = alg.run(parameters, context, feedback)

python/plugins/processing/gui/BatchAlgorithmDialog.py

@@ -78,8 +78,8 @@ class BatchAlgorithmDialog(AlgorithmDialogBase):
         alg_parameters = []
         load = []
 
-        context = dataobjects.createContext()
         feedback = self.createFeedback()
+        context = dataobjects.createContext(feedback)
 
         for row in range(self.mainWidget.tblParameters.rowCount()):
             col = 0

python/plugins/processing/gui/ProcessingToolbox.py

@@ -253,7 +253,6 @@ class ProcessingToolbox(BASE, WIDGET):
     def executeAlgorithm(self):
         item = self.algorithmTree.currentItem()
         if isinstance(item, TreeAlgorithmItem):
-            context = dataobjects.createContext()
             alg = QgsApplication.processingRegistry().algorithmById(item.alg.id())
             ok, message = alg.canExecute()
             if not ok:
@@ -287,6 +286,7 @@ class ProcessingToolbox(BASE, WIDGET):
                         self.addRecentAlgorithms(True)
             else:
                 feedback = MessageBarProgress()
+                context = dataobjects.createContext(feedback)
                 parameters = {}
                 ret, results = execute(alg, parameters, context, feedback)
                 handleAlgorithmResults(alg, parameters, context, feedback)

python/plugins/processing/gui/menus.py

@@ -203,7 +203,6 @@ def _executeAlgorithm(alg):
         dlg.exec_()
         return
 
-    context = dataobjects.createContext()
     if (alg.countVisibleParameters()) > 0:
         dlg = alg.createCustomParametersWidget(None)
         if not dlg:
@@ -220,6 +219,7 @@ def _executeAlgorithm(alg):
             canvas.setMapTool(prevMapTool)
     else:
         feedback = MessageBarProgress()
+        context = dataobjects.createContext(feedback)
         parameters = {}
         ret, results = execute(alg, parameters, context, feedback)
         handleAlgorithmResults(alg, context, feedback)

python/plugins/processing/tools/dataobjects.py

@@ -65,7 +65,7 @@ TYPE_FILE = 4
 TYPE_TABLE = 5
 
 
-def createContext():
+def createContext(feedback):
     """
     Creates a default processing context
     """
@@ -77,9 +77,11 @@ def createContext():
         invalid_features_method = QgsFeatureRequest.GeometryAbortOnInvalid
     context.setInvalidGeometryCheck(invalid_features_method)
 
-    def raise_transform_error(f):
-        raise GeoAlgorithmExecutionException(QCoreApplication.translate("FeatureIterator",
-                                                                        'Encountered a transform error when reprojecting feature with id {}.'.format(f.id())))
+    def raise_transform_error(f, feedback=feedback):
+        if feedback:
+            feedback.pushInfo(QCoreApplication.translate("FeatureIterator",
+                                                         'Encountered a transform error when reprojecting feature with id {}.'.format(f.id())))
+
     context.setTransformErrorCallback(raise_transform_error)
 
     settings = QgsSettings()