better fix for cached completion engine losing its process

Author: denisri

capsul/attributes/completion_engine.py

@@ -983,6 +983,10 @@ def get_completion_engine(self, process, name=None):
         instance, which is quite incomplete.
         '''
         if hasattr(process, 'completion_engine'):
+            # just in case the process has been changed in the CE
+            if process.completion_engine.process != process:
+                process.completion_engine.process = weak_proxy(
+                    process, process.completion_engine._clear_node)
             return process.completion_engine
 
         if isinstance(process, Switch):

capsul/attributes/completion_engine_factory.py

@@ -18,6 +18,7 @@
     FomProcessCompletionEngineIteration
 from capsul.pipeline.process_iteration import ProcessIteration
 from capsul.pipeline.pipeline_nodes import ProcessNode
+from soma.utils.weak_proxy import weak_proxy
 
 
 class BuiltinProcessCompletionEngineFactory(ProcessCompletionEngineFactory):
@@ -38,7 +39,9 @@ def get_completion_engine(self, process, name=None):
         '''
         if hasattr(process, 'completion_engine'):
             # just in case the process has been changed in the CE
-            process.completion_engine.process = process
+            if process.completion_engine.process != process:
+                process.completion_engine.process = weak_proxy(
+                    process, process.completion_engine._clear_node)
             return process.completion_engine
 
         study_config = process.get_study_config()