fix a bug when deleting a pipeline from the scene

Author: servoz

capsul/pipeline/pipeline.py

@@ -226,6 +226,7 @@ def __init__(self, autoexport_nodes_parameters=None, **kwargs):
 
         # Class attributes
         # this one is only useful to maintain subprocesses/subpipelines life
+        self._pipeline_released = False
         self.list_process_in_pipeline = []
         self.nodes_activation = Controller()
         self.nodes = SortedDictionary()

capsul/qt_gui/widgets/pipeline_developer_view.py

@@ -2676,7 +2676,6 @@ def __init__(self, pipeline=None, parent=None, show_sub_pipelines=False,
         self._restricted_edition = False
         self.disable_overwrite = False
         self._userlevel = userlevel
-        self._pipeline_released = False
         self.doc_browser = None
 
         self.set_pipeline(pipeline)
@@ -2808,11 +2807,6 @@ def release_pipeline(self, delete=False):
         # Setup callback to update view when pipeline state is modified
         from soma.qt_gui.qt_backend import sip
 
-        if getattr(self, '_pipeline_released', False):
-            return  # already released
-        
-        self._pipeline_released = True
-
         try:
             pipeline = None
 
@@ -2826,6 +2820,11 @@ def release_pipeline(self, delete=False):
 
             if pipeline is not None:
 
+                if getattr(pipeline, '_pipeline_released', False):
+                    return  # pipeline already released
+        
+                pipeline._pipeline_released = True
+
                 if hasattr(pipeline, 'pipeline_steps'):
                     pipeline.pipeline_steps.on_trait_change(
                         self._reset_pipeline, remove=True